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© 2004 Panasonic Communications Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. KX-FT906HG-B KX-FT908HG-B (Black Version) (for Hungary ) Thermal FAX with Digital Answering System IMPORTANT INFORMATION ABOUT LEAD FREE, (PbF), SOLDERING If lead free solder was used in the manufacture of this product the printed circuit boards will be marked PbF. Standard leaded, (Pb), solder can be used as usual on boards without the PbF mark. When this mark does appear, please read and follow the special instructions described in this manual on the use of PbF and how it might be permissible to use Pb solder during service and repair work. ORDER NO. KMF0411828C2

Panasonic Kx Ft906hg b 908hg b

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Page 1: Panasonic Kx Ft906hg b 908hg b

© 2004 Panasonic Communications Co., Ltd. Allrights reserved. Unauthorized copying anddistribution is a violation of law.

KX-FT906HG-BKX-FT908HG-B(Black Version)

(for Hungary )

Thermal FAX with Digital Answering System

IMPORTANT INFORMATION ABOUT LEAD FREE, (PbF), SOLDERINGIf lead free solder was used in the manufacture of this product the printed circuit boards will be marked PbF.

Standard leaded, (Pb), solder can be used as usual on boards without the PbF mark.

When this mark does appear, please read and follow the special instructions described in this manual on the use of PbF and howit might be permissible to use Pb solder during service and repair work.

ORDER NO. KMF0411828C2

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1 INTRODUCTION 3

1.1. TRANSLATION LISTS 3

1.2. ABOUT LEAD FREE SOLDER (PbF: Pb free) 5

1.3. SAFETY PRECAUTIONS 7

1.4. INSULATION RESISTANCE TEST 7

1.5. FOR SERVICE TECHNICIANS 7

1.6. BATTERY CAUTION 7

1.7. AC CAUTION 8

1.8. PERSONAL SAFETY PRECAUTIONS 8

1.9. SERVICE PRECAUTIONS 9

2 FEATURES AND SPECIFICATIONS 10

2.1. FEATURES 10

2.2. OPTIONAL ACCESSORIES 10

2.3. SPECIFICATIONS 11

3 INSTALLATION 12

3.1. LOCATION OF CONTROLS 12

3.2. CONNECTIONS 14

3.3. INSTALLATION 15

4 MAINTENANCE 20

4.1. MAINTENANCE ITEMS AND COMPONENT LOCATIONS

20

4.2. JAMS 22

4.3. CLEANING 23

5 DISASSEMBLY INSTRUCTIONS 25

5.1. DISASSEMBLY FLOW CHART 25

6 DISASSEMBLY INSTRUCTIONS 27

6.1. HOW TO REMOVE THE PAPER STACKER 27

6.2. HOW TO REMOVE THE OPERATION PANEL BLOCK 28

6.3. HOW TO REMOVE THE OPERATION BOARD AND LCD

29

6.4. HOW TO REMOVE THE IMAGE SENSOR 30

6.5. HOW TO REMOVE THE THERMAL HEAD AND CUTTER

UNIT 31

6.6. HOW TO REMOVE THE DOCUMENT TRAY 32

6.7. HOW TO REMOVE THE BOTTOM FRAME 33

6.8. HOW TO REMOVE THE HANDSET CRADLE CABINET

AND SPEAKER 34

6.9. HOW TO REMOVE THE DIGITAL, ANALOG AND

POWER SUPPLY BOARD AND AC INLET 35

6.10. HOW TO REMOVE THE ROLLERS 36

6.11. HOW TO REMOVE THE MOTOR BLOCK 37

6.12. INSTALLATION POSITION OF THE LEAD WIRES 40

6.13. INSTALLATION OF THERMAL HEAD 41

7 TROUBLESHOOTING GUIDE 42

7.1. TROUBLESHOOTING SUMMARY 42

7.2. USER RECOVERABLE ERRORS 43

7.3. PROGRAMMING AND LISTS 45

7.4. TEST FUNCTIONS 48

7.5. TROUBLESHOOTING DETAILS 57

8 CIRCUIT OPERATIONS 109

8.1. CONNECTION DIAGRAM 109

8.2. GENERAL BLOCK DIAGRAM 110

8.3. CONTROL SECTION 112

8.4. FACSIMILE SECTION 119

8.5. SENSORS AND SWITCHES 129

8.6. MODEM SECTION 133

8.7. ANALOG UNIT BLOCK DIAGRAM 140

8.8. NCU SECTION 141

8.9. ITS (INTEGRATED TELEPHONE SYSTEM) AND

MONITOR SECTION 143

8.10. ATAS (AUTOMATIC TELEPHONE ANSWERING

SYSTEM) SECTION 143

8.11. OPERATION BOARD SECTION 145

8.12. LCD SECTION 146

8.13. POWER SUPPLY BOARD SECTION 147

9 REFERENCE MATERIAL DATA 150

9.1. TERMINAL GUIDE OF THE ICs TRANSISTORS AND

DIODES 150

9.2. HOW TO REPLACE THE FLAT PACKAGE IC 151

9.3. TEST CHART 155

10 FIXTURES AND TOOLS 157

11 CABINET, MECHANICAL 158

11.1. OPERATION PANEL SECTION 158

11.2. UPPER CABINET SECTION 159

11.3. LOWER CABINET 160

11.4. MOTOR SECTION 161

11.5. ACTUAL SIZE OF SCREWS 163

12 ACCESSORIES AND PACKING MATERIALS 164

13 REPLACEMENT PARTS LIST 165

13.1. CABINET AND ELECTRICAL PARTS 165

13.2. DIGITAL BOARD PARTS 166

13.3. ANALOG BOARD PARTS 168

13.4. OPERATION BOARD PARTS 169

13.5. POWER SUPPLY BOARD PARTS 170

13.6. FIXTURES AND TOOLS 171

14 MEMO 172

15 PRINTED CIRCUIT BOARD 173

15.1. DIGITAL BOARD (PCB1) 173

15.2. ANALOG BOARD (PCB2) 175

15.3. OPERATION BOARD (PCB3) 177

15.4. POWER SUPPLY BOARD (PCB4) 179

16 FOR THE SCHEMATIC DIAGRAMS 180

17 MEMO 181

18 SCHEMATIC DIAGRAM 182

18.1. DIGITAL BOARD (PCB1) 182

18.2. ANALOG BOARD (PCB2) 184

18.3. OPERATION BOARD (PCB3) 186

18.4. POWER SUPPLY BOARD (PCB4) 187

CONTENTS Page Page

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1 INTRODUCTION1.1. TRANSLATION LISTS

1.1.1. HELP FUNCTION

1.1.2. ERROR MESSAGES

1.1.2.1. DISPLAY

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1.1.2.2. REPORTS

1.1.3. OTHERS

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1.2. ABOUT LEAD FREE SOLDER (PbF: Pb free)Note:

In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder thatcontains lead.

We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn),Silver, (Ag), and Copper, (Cu).

This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repairwork we suggest using the same type of solder although, with some precautions, standard Pb solder can also be used.

Caution

• • • • PbF solder has a melting point that is 50° ~ 70° F, (30° ~ 40°C) higher than Pb solder. Please use a soldering iron withtemperature control and adjust it to 700° ± 20° F, (370° ± 10°C). In case of using high temperature soldering iron, pleasebe careful not to heat too long.

• • • • PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100°F, (600°C).

• • • • If you must use Pb solder on a PCB manufactured using PbF solder, remove as much of the original PbF solder as possibleand be sure that any remaining is melted prior to applying the Pb solder.

• • • • When applying PbF solder to double layered boards, please check the component side for excess which may flow onto theopposite side (See figure, below).

1.2.1. SUGGESTED PbF SOLDER

There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper,

(Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufac

turer’s specific instructions for the melting points of their products and any precautions for using their product with other

materials.

The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.

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1.2.2. HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED

P.C.Boards marked as “PbF” use Pb Free solder. (See the figure below.)

Pb Free is not used the Power Supply Board of this unit.

(Example : Digital Board)

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1.3. SAFETY PRECAUTIONS 1. Before servicing, unplug the AC power cord to prevent an electric shock.

2. When replacing parts, use only the manufacturer´s recommended components.

3. Check the condition of the power cord. Replace if wear or damage is evident.

4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.

5. Before returning the serviced equipment to the customer, be sure to perform the following insulation resistance test to preventthe customer from being exposed to shock hazards.

1.4. INSULATION RESISTANCE TEST 1. Unplug the power cord and short the two prongs of the plug with a jumper wire.

2. Turn on the power switch.

3. Measure the resistance value with an ohmmeter between the jumpered AC plug and each exposed metal cabinet part

(screw heads, control shafts, bottom frame, etc.).

Note: Some exposed parts may be isolated from the chassis by design. These will read infinity.

4. If the measurement is outside the specified limits, there is a possibility of a shock hazard.

1.5. FOR SERVICE TECHNICIANSICs and LSIs are vulnerable to static electricity.

When repairing, the following precautions will help prevent recurring malfunctions.

1. Cover the plastic part´s boxes with aluminum foil.

2. Ground the soldering irons.

3. Use a conductive mat on the worktable.

4. Do not touch the IC or LSI pins with bare fingers.

1.6. BATTERY CAUTIONCAUTION

Danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent type recommended by themanufacturer. Dispose of used batteries according to the manufacturer’s Instructions.

The lithium battery is a critical component (type No. CR2032). Please observe for the proper polarity and the exact locationwhen replacing it and the exact location when replacing it and soldering the replacement lithium battery in.

Recommend Type Number:

CR2032 (BAT501) Manufactured by MATSUSHITA/SONY/TOSHIBA/HITACHI

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1.7. AC CAUTIONFor safety, before closing the lower cabinet, please make sure of the following precautions.

1. The earth lead is fixed with the screw.

2. The AC connector is connected properly.

3. Wrap the earth lead around the core 5 times.

4. Wrap the AC lead around the core 4 times.

1.8. PERSONAL SAFETY PRECAUTIONS

1.8.1. MOVING SECTIONS OF THE UNIT

Be careful not to let your hair, clothes, fingers, accessories, etc., become caught in any moving sections of the unit.

The moving sections of the unit are the rollers and a gear. There is a separation roller and a document feed roller which are rotatedby the document feed motor. A gear rotates the two rollers. Be careful not to touch them with your hands, especially when the unitis operating.

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1.8.2. LIVE ELECTRICAL SECTIONS

All the electrical sections of the unit supplied with AC power by the AC power cord are live.

Never disassemble the unit for service with the AC power supply plugged in.

CAUTION:

AC voltage is supplied to the primary side of the power supply unit. Therefore, always unplug the AC power cord beforedisassembling for service.

1.9. SERVICE PRECAUTIONS

1.9.1. PRECAUTIONS TO PREVENT DAMAGE FROM STATIC ELECTRICITY

Electrical charges accumulate on a person. For instance, clothes rubbing together can damage electric elements or change theirelectrical characteristics. In order to prevent static electricity, touch a metallic part that is grounded to release the static electricity.Never touch the electrical sections such as the power supply unit, etc.

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2 FEATURES AND SPECIFICATIONS

2.1. FEATURESGeneral

• • • • Help function

Display: Refer to HELP FUNCTION (P.3)

− − − − HOW TO SET UP

− − − − DIRECTORY

− − − − AUTO ANSWER

− − − − CALLER ID

− − − − Telephone answering device operation

• • • • LCD (Liquid Crystal Display) readout

Facsimile

• • • • Resolution: Standard/Fine/Super Fine/Photo

• • • • Copier Function

• • • • Help Printout

• • • • Automatic Document Feeder (10 Sheets)

• • • • Easy-to-view LCD (15 Characters)

• • • • Broadcast (up to 10 Stations)

Integrated telephone system

• • • • One-touch dial (22 items)

• • • • Navigator directory (100 items)

• • • • Digital Duplex Speakerphone

Digital answering system

• • • • Voice Time/Day Stamp

• • • • Quick & Slow Playback Speeds

2.2. OPTIONAL ACCESSORIESModel No. Description Specifications

KX-A106 Standard thermal recording paper 216 mm × 30 m roll, with 25 mm core

Note:

Only use the included/specified recording paper, or else the print quality may be affected and/or excessive thermalhead wear may occur .

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2.3. SPECIFICATIONSApplicable Lines: Public Switched Telephone NetworkDocument Size: Max. 216 mm in width

Max. 600 mm in lengthEffective Scanning Width: 208 mmRecording Paper Size: 216 mm × max. 30 m rollEffective Printing Width: 208 mmTransmission Time*1: Approx. 15 s/page (Original mode)*2

Scanning Density: Horizontal:

8 pels/mm

Vertical:

3.85 lines/mm — in standard resolution

7.7 lines/mm — in fine/photo resolution

15.4 lines/mm — in super fine resolutionHalftone Level: 64-levelScanner Type: Contact Image Sensor (CIS)Printer Type: Thermal PrintingData Compression System: Modified Huffman (MH), Modified READ (MR)Modem Speed: 9,600 / 7,200 / 4,800 / 2,400 bps; Automatic FallbackOperating Environment: 5—35°C, 20—80 % RH (Relative Humidity)Dimensions: Approx. height 120 mm × width 347 mm × depth 270 mmMass (Weight): Approx. 2.6 kg (KX-FT906HG-B) Approx. 2.7 kg (KX-FT908HG-B)Power Consumption: Standby: Approx. 3.0 W

Transmission: Approx. 25 W (When sending 20% black document)

Reception: Approx. 40 W (When receiving 20% black document)

Copy: Approx. 40 W (When copying the ITU-T No. 1 Test Chart)

Maximum: Approx. 125 W (When receiving a 100% black document)Power Supply: 220-240 V AC, 50/60 HzFax Memory Capacity: Approx. 20 pages of document memory (Based on the ITU-T No. 1 Test Chart in

standard resolution when no voice messages have been recorded.)Voice Memory Capacity*3: Approx. 20 minutes of recording time including greeting messages when no documents

are in memory.

*1 Transmission speed depends upon the contents of the pages, resolution, telephone line conditions and capability of the otherparty’s machine.

*2 Transmission speed is based upon the ITU-T No. 1 Test Chart. (Refer to ITU-T No.1 TEST CHART (P.155).) If the capability ofthe other party´s machine is inferior to your unit, the transmission time may be longer.

*3 Recording time may be reduced by the calling party’s background noise.

Note:

• • • • Any details given in these instructions are subject to change without notice.

• • • • The pictures and illustrations in these instructions may vary slightly from the actual product.

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(1) Speaker

(2) Document guides

(3) Document tray

(4) Paper stacker (KX-FT908HG-B ONLY)The paper stacker may not be shown in all illustrations inthis operating instructions.

(5) Document exit

(6) Microphone

(7) Document entrance

(8) Cover open button

Note:

• • • • Remove all the blue shipping tapes beforeinstallation.

3 INSTALLATION3.1. LOCATION OF CONTROLS3.1.1. FRONT VIEW

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(1) [TONE]

• • • • To change from pulse to tone temporarily during diallingwhen your line has rotary pulse services.

(2) [SLOW]

• • • • To slow down message playback.

(3) [QUICK]

• • • • To speed up message playback.

(4) [PLAY MESSAGES]

• • • • To play messages.

(5) [RECORD]

• • • • To record messages.

(6) [ERASE]

• • • • To erase messages.

(7) [BROADCAST]

• • • • To transmit a document to multiple parties.

(8) Station keys

• • • • To use the one-touch dial feature.

(9) [AUTO ANSWER]

• • • • To turn ON/OFF the auto answer setting.

(10) [CALLER ID]

• • • • To use Caller ID features.

(11) [STOP]

• • • • To stop an operation or programming.

(12) [FLASH]

• • • • To access special telephone services or for transferringextension calls.

(13) [REDIAL] [PAUSE]

• • • • To redial the last number dialled. If the line is busy whenyou make a phone call using the [DIGITAL SP-PHONE]button, the unit will automatically redial the number up to5 times.

• • • • To insert a pause during dialling

(14) [MUTE]

• • • • To mute your voice to the other party during aconversation. Press this button again to resume theconversation.

(15) [DIGITAL SP-PHONE]

• • • • For speakerphone operation.

(16) [MENU]

• • • • To initiate or exit programming.

(17) [NAVIGATOR] [VOLUME]

• • • • To adjust volume.

• • • • To search for a stored item.

• • • • To select features or feature settings duringprogramming.

• • • • To navigate to the next operation.

(18) [HELP]

• • • • To print helpful information for quick reference.

(19) [LOWER]

• • • • To select stations 12-22 for the one-touch dial feature.

(20) [MIC]

• • • • The built-in microphone.

(21) [FAX/START] [SET]

• • • • To start sending or receiving a fax.

• • • • To store a setting during programming.

(22) [COPY]

• • • • To copy a document.

3.1.2. CONTROL PANEL

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3.2. CONNECTIONS

(1) Handset cord.

(2) Telephone line cord.

(3) Power cord (220-240 V AC, 50/60 Hz).

(4) Paper stacker. (KX-FT908HG-B ONLY)

(5) [EXT] jack

(6) Extension telephone (not included)

Caution:

• • • • When you operate this product, the power outlet should be near the product and easily accessible.

• • • • Be sure to use the telephone line cord included in this unit.

• • • • Do not extend the telephone line cord.

• • • • Keep the unit away from walls as far as possible to prevent a recording paper jam.

Note:

• • • • To avoid malfunction, do not position fax machine near appliance such as TVs or speakers which generate an intensemagnetic field.

• • • • If any other device is connected on the same line, this unit may disturb the network condition of the device.

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3.3. INSTALLATION

3.3.1. INSTALLATION SPACE

The space required to install the unit is shown below.

The dimensions given are necessary for the unit to operate efficiently.

Note:

• • • • Avoid excessive heat or humidity.

• • • • Use the unit within the following ranges of temperature and humidity.

• • • • Ambient temperature: 5°C to 35°C

• • • • Relative humidity: 20% to 80% (without condensation)

• • • • Power cord length should be less than 5 meters. Using a longer cord may reduce the voltage or cause malfunctions.

• • • • Avoid direct sunlight.

• • • • Do not install near devices which contain magnets or generate magnetic fields.

• • • • Do not subject the unit to strong physical shock or vibration.

• • • • Keep the unit clean. Dust accumulation can prevent the unit from functioning properly.

• • • • To protect the unit from damage, hold both sides when you move it.

3.3.2. PAPER STACKER (KX-FT908HG-B ONLY)

Install the paper stacker.

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1 Open the cover by pressing the cover open button ( ).

2 Install the recording paper.

3 Insert the leading edge of the paper into the opening above thethermal head ( ).

4 Pull the paper out of the unit.

• • • • Make sure that there is no slack in the paper roll.

5 Close the cover securely by pushing down on.

6 KX-FT906HG-BTear off the excess paper by pulling it towards you.

6 KX-FT908HG-BPress [FAX/START] to cut the paper.

Note: • • • • If the paper is secured with glue or tape, cut approximately

15 cm from the beginning of the roll before installing it.

• • • • When the power cord is connected, a message is printedeach time the cover is opened then closed. If the recordingpaper is installed upside down, the massage will not beprinted. Install the paper correctly.

3.3.3. RECORDING PAPER

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3.3.4. DOCUMENTS THE UNIT CAN FEED

Note:

• • • • Remove clips, staples or other similar fasteners.

• • • • Do not send the following types of documents. (Make a copy of the document and send the copy.)

— Chemically treated paper such as carbon or carbon less duplicating paper

— Electrostatically charged paper

— Badly curled, creased or torn paper

— Paper with a coated surface

— Paper with a faint image

— Paper with printing on the opposite side that can be seen through the other side (i.e. newspaper)

• • • • Check that ink, paste or correction fluid has dried completely.

• • • • To transmit the document with a width of less than standard A4 size (210 mm), we recommend using a copy machine tocopy the original document onto A4 or letter-sized paper, then transmit the copied document.

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The logo can be your company, division or name.

Refer to TRANSLATION LISTS (P.3)

3.3.5. SETTING YOUR LOGO

To enter your logoExample: “BI LL”

1. Press [2] 2 times.

2. Press [4] 3 times.

3. Press [5] 3 times.

4. Press [ ] to move the cursor to the next space and press[5] 3 times.

1 Press [MENU].

2 Press [SET].

3 Press [ ] or [ ] repeatedly to display the following. To correct a mistakePress [ ] or [ ] to move the cursor to the incorrect character,and make the correction.

To delete a characterPress [ ] or [ ] to move the cursor to the character you wantto delete and press [STOP].

To insert a character 1. Press [ ] or [ ] to move the cursor to the position to the

right of where you want to insert the character.

2. Press [MUTE] to insert a space and enter the character.4 Press [SET].

• • • • The underbar shows a position of the cursor.

5 Enter your logo, up to 30 characters. See the character table onpage 15 for details.

6 Press [SET]. • • • • The next feature will be displayed.

7 Press [MENU] to exit the program.

Note: • • • • Your logo will be printed on each page transmitted from

your unit.

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To select characters using or

Instead of pressing the dial keys, you can select charactersusing or .

1. Press repeatedly to display the desired character.Characters will be displayed in the following order.

a. Uppercase letters

b. Number

c. Symbol

d. Lowercase letters

• • • • If you press , the order will be reversed.

2. Press [ ] to insert the character.

• • • • The character displayed in step 1 is inserted.

3. Return to step 1 to enter the next character.

3.3.5.1. TO SELECT CHARACTERS WITH THE DIAL KEYPAD

Pressing the dial keys will select a character as shown below.

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4 MAINTENANCE4.1. MAINTENANCE ITEMS AND COMPONENT LOCATIONS

4.1.1. OUTLINE

MAINTENANCE AND REPAIRS ARE PERFORMED USING THE FOLLOWING STEPS.

1. Periodic maintenance

Inspect the equipment periodically and if necessary, clean any contaminated parts.

2. Check for breakdowns

Look for problems and consider how they arose.

If the equipment can be still used, perform copying, self testing or communication testing.

3. Check equipment

Perform copying, self testing and communication testing to determine if the problem originates from the transmitter, receiver orthe telephone line.

4. Determine causes

Determine the causes of the equipment problem by troubleshooting.

5. Equipment repairs

Repair or replace the defective parts and take appropriate measures at this stage to ensure that the problem will not recur.

6. Confirm normal operation of the equipment

After completing the repairs, conduct copying, self testing and communication testing to confirm that the equipment operatesnormally.

7. Record keeping

Make a record of the measures taken to rectify the problem for future reference.

4.1.2. COMPONENT LOCATIONS

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4.1.2.1. MAINTENANCE LIST

NO. OPERATION CHECK REMARKS1 Document Path Remove any foreign matter such as paper. —2 Rollers If the roller is dirty, clean it with a damp cloth then dry

thoroughly.Refer to DOCUMENT FEEDER (P.23).

3 Platen Roller If the platen is dirty, clean it with a damp cloth then drythoroughly. Remove the paper and film cartridge beforecleaning.

4 Thermal Head If the thermal head is dirty, clean the printing surface with acloth moistened with denatured alcohol (alcohol withoutwater), then dry thoroughly.

Refer to THERMAL HEAD (P.24).

5 Sensors Document sensor (PS1), Read position sensor (sw44),Recording paper/cover open sensor(SW1), Jam sensor(SW3), Hook switch (SW2) Chloroform the operation ofthe sensors.

See COMPONENT LOCATIONS (P.20) andHOW TO REMOVE THE DIGITAL, ANALOGAND POWER SUPPLY BOARD AND ACINLET (P.35).

6 Glass If the glass is dirty, clean with a dry soft cloth. Refer to DOCUMENT FEEDER (P.23).7 Abnormal, wear and tear

or loose partsReplace the part. Check if the screws are tight on all parts. —

4.1.2.2. MAINTENANCE CYCLE

No. Item Cleaning Cycle ReplacementCycle Procedure

1 Separation Roller (Ref. No. 141) 3 months 7 years* (10,000 documents) Refer to HOW TO REMOVE THE MOTORBLOCK (P.37).

2 Separation Rubber (Ref. No. 11) 3 months 7 years (10,000 documents) Refer to COMPONENT LOCATIONS (P.20).3 Feed Rollers (Ref. No. 9) 3 months 7 years (10,000 documents) Refer to DISASSEMBLY INSTRUCTIONS

(P.25).4 Thermal Head (Ref. No. 95) 3 months 7 years (10,000 documents) Refer to HOW TO REMOVE THE

THERMAL HEAD AND CUTTER UNIT(P.31).

5 Platen Roller (Ref. No. 54) 3 months 7 years (10,000 documents) Refer to HOW TO REMOVE THE ROLLERS(P.36).

6 Pickup Roller (Ref. No. 46) 3 months 7 years (10,000 documents) Refer to HOW TO REMOVE THE ROLLERS(P.36).

* These values are standard and may vary depending on usage conditions.

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1 Open the cover by pressing the cover open button ( ).

2 KX-FT906HG-Bskip to step 3KX-FT908HG-BLift the green lever. • • • • The paper cutter will be released

3 Remove the recording paper.

4 Cut off the wrinkled portion.

5 Install the recording paper and close the cover securely bypushing down on both sides.

4.2. JAMS

4.2.1. RECORDING PAPER JAMS

When the recording paper has jammed in the unit

The display will show the following.

Refer to TRANSLATION LISTS (P.3)

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4.2.2. DOCUMENT JAMS - SENDING

1 Open the cover by pressing the cover open button ( ) andremove the jammed document carefully ( ).

2 Close the cover securely by pushing down on both sides.

Note: • • • • Do not pull out the jammed paper forcibly before

opening the front cover.

4.3. CLEANING

4.3.1. DOCUMENT FEEDER

Clean the document feeder when:

- Documents frequently misfiled.

- Smudges or black/white lines appear on the originaldocument when transmitting or copying.

1 Disconnect the power cord and the telephone line cord.

2 Open the cover by pressing the cover open ( ) button.

3 Clean the document feeder rollers ( ) and rubber flap ( )with a cloth moistened with isopropyl rubbing alcohol, and let allparts dry thoroughly. Clean the white plate ( ) and scannerglass ( ) with a soft and dry cloth.Caution:

Do not use paper products, such as paper towels ortissues.

4 Connect the power cord and the telephone line cord.

5 Close the cover securely by pushing down on both sides.

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4.3.2. THERMAL HEAD

If smudges or black/white lines appear on a copied/receiveddocument, check whether there is dust on the thermal headand head cover. Clean them to remove the dust.

1 Disconnect the power cord and the telephone line cord.

2 Open the cover by pressing the cover open button ( ) andremove the recording paper.

3 Clean the thermal head ( ) and head cover ( ) with a clothmoistened with isopropyl rubbing alcohol, and let all parts drythoroughly.

Caution:To prevent a malfunction due to static electricity, do notuse a dry cloth and do not touch the thermal headdirectly.

4 Connect the power cord and the telephone line cord.

5 Install the recording paper and close the cover securely bypushing down on both sides.

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5 DISASSEMBLY INSTRUCTIONS5.1. DISASSEMBLY FLOW CHART

5.1.1. UPPER CABINET SECTION

CROSS REFERENCE:

A-1: HOW TO REMOVE THE PAPER STACKER (P.27)

A-2: HOW TO REMOVE THE OPERATION PANEL BLOCK (P.28)

A-3: HOW TO REMOVE THE OPERATION BOARD AND LCD (P.29)

A-4: HOW TO REMOVE THE IMAGE SENSOR (P.30)

A-5: HOW TO REMOVE THE THERMAL HEAD AND CUTTER UNIT (P.31)

A-6: HOW TO REMOVE THE DOCUMENT TRAY (P.32)

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5.1.2. LOWER CABINET SECTION

CROSS REFERENCE:

A-1: HOW TO REMOVE THE PAPER STACKER (P.27)

A-2: HOW TO REMOVE THE OPERATION PANEL BLOCK (P.28)

B-1: HOW TO REMOVE THE BOTTOM FRAME (P.33)

B-2: HOW TO REMOVE THE HANDSET CRADLE CABINET AND SPEAKER (P.34)

B-3: HOW TO REMOVE THE DIGITAL, ANALOG AND POWER SUPPLY BOARD AND AC INLET (P.35)

B-4: HOW TO REMOVE THE ROLLERS (P.36)

B-5: HOW TO REMOVE THE MOTOR BLOCK (P.37)

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6 DISASSEMBLY INSTRUCTIONS6.1. HOW TO REMOVE THE PAPER STACKER

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6.2. HOW TO REMOVE THE OPERATION PANEL BLOCK

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6.3. HOW TO REMOVE THE OPERATION BOARD AND LCD

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6.4. HOW TO REMOVE THE IMAGE SENSOR

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6.5. HOW TO REMOVE THE THERMAL HEAD AND CUTTER UNIT

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6.6. HOW TO REMOVE THE DOCUMENT TRAY

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6.7. HOW TO REMOVE THE BOTTOM FRAME

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6.8. HOW TO REMOVE THE HANDSET CRADLE CABINET AND SPEAKER

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6.9. HOW TO REMOVE THE DIGITAL, ANALOG AND POWER SUPPLYBOARD AND AC INLET

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6.10. HOW TO REMOVE THE ROLLERS

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6.11. HOW TO REMOVE THE MOTOR BLOCK

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CROSS REFERENCE:

HOW TO REMOVE THE THERMAL HEAD AND CUTTER UNIT (P.31)

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6.12. INSTALLATION POSITION OF THE LEAD WIRES

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6.13. INSTALLATION OF THERMAL HEAD

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7 TROUBLESHOOTING GUIDE

7.1. TROUBLESHOOTING SUMMARY

7.1.1. TROUBLESHOOTING

After confirming the problem by asking the user, troubleshoot according to the instructions and observe the following precautions.

7.1.2. PRECAUTIONS

1. If there is a problem with the print quality or the paper feed, first check if the installation space and the print paper meets thespecifications, the paper selection lever/paper thickness lever is set correctly, and the paper is set correctly without any slack.

2. Before troubleshooting, first check that the connectors and cables are connected correctly (not loose).

If the problem occurs randomly, check it very carefully.

3. When connecting the AC power cord with the unit case and checking the operation, exercise utmost care when handling electricparts in order to avoid electric shocks and short-circuits.

4. After troubleshooting, double check that you have not forgotten any connectors, left any loose screws, etc.

5. Always test to verify that the unit is working normally.

7.1.3. WHEN YOU DON´T KNOW HOW TO OPERATE THE UNIT, USE THE HELPFUNCTION

• • • • How to use:

1. press repeatedly until the desired item is displayed.

2. press .

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• • • • There is something wrong with the unit.

[This error is displayed when the thermal head does notwarm up. Check the thermistor on the thermal head andconnector lead.]

• • • • This message appears when the gear is not in an idle state.Check the GEAR BLOCK and Handset JACK UNIT.

(Refer to GEAR SECTION (P.125).)

• • • • The cover is open. Close it.

• • • • The unit has run out of recording paper. Install a recordingpaper(Refer to RECORDING PAPER JAMS (P.22).)

• • • • The document was not fed into the unit properly. Re-insertthe document. If misfeeding occurs frequently, clean thedocument feeder rollers and try again.

(Refer to DOCUMENT FEEDER (P.23).)

• • • • Attempted to send a document longer than 600 mm. Press[STOP] to remove the document. Divide the document intotwo or more sheets and try again.

• • • • The memory (telephone numbers, parameters, etc.) hasbeen erased. Re-program.

• • • • There is no space to store new items in navigator directory.Erase unnecessary items.

• • • • The unit has a document in memory. See the otherdisplayed message instructions to print out the document.

• • • • There is no memory available to receive fax documents andrecord voice messages. Print out the documents in memoryor erase unnecessary messages.

• • • • The other partyís fax machine is busy or has run out ofrecording paper. Try again.

• • • • Your TAD/FAX greeting message is not recorded. Record amessage.

• • • • The voice guidance feature is set to OFF. Activate feature#47 (Refer to SERVICE FUNCTION TABLE (P.46). Thepre-recorded greeting message will be used.

• • • • Your transfer greeting message is not recorded. Record amessage.

• • • • he voice guidance feature is turned OFF. Activate feature#47 (Refer to SERVICE FUNCTION TABLE (P.46). Thepre-recorded greeting message will be used.

• • • • A recording paper jam occurred. Clear the jammed paper.(Refer to RECORDING PAPER (P.16).)

• • • • The recording paper is not installed correctly. Install thepaper correctly.(Refer to RECORDING PAPER (P.16).)

• • • • The other partyís fax machine does not offer the pollingfunction. Check with the other party.

• • • • The other party´s fax machine is busy or has run out ofrecording paper. Try again.

• • • • The document is jammed. Remove the jammed document.(Refer to DOCUMENT JAMS - SENDING (P.23).)

• • • • Press [STOP] to eject the jammed document.

7.2. USER RECOVERABLE ERRORSIf the unit detects a problem, one or more of the following messages will appear on the display.

The explanations given in the [ ] are for servicemen only.

Refer to TRANSLATION LISTS (P.3)

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• • • • A transmission error occurred. Try again.

• • • • The unit is too hot. Stop using the unit for a while and let theunit cool down.

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7.3. PROGRAMMING AND LISTSThe programming functions are used to program the various features and functions of the machine, and to test the machine.Programming can be done in both the on-hook and off-hook conditions. This facilitates communication between the user andthe service while programming the machine.

7.3.1. OPERATION

There are 2 basic categories of programming functions, the User Mode and the Service Mode. The Service Mode is further brokendown into the normal and special programs. The normal programs are those listed in the Operating Instructions and are availableto the user. The special programs are only those listed here and not displayed to the user. In both the User and Service Modes,there are Set Functions and Test Functions. The Set Functions are used to program various features and functions, and the TestFunctions are used to test the various functions.The Set Functions are accessed by entering their code, changing the appropriate value, then pressing the SET key.The Test Functions are accessed by entering their code and pressing the key listed on the menu. While programming, to cancelany entry, press the STOP key.

7.3.2. OPERATION FLOW

Refer to TRANSLATION LISTS (P.3)

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7.3.3. SERVICE FUNCTION TABLE

Code Function Set Value Effective Range Default Remarks501 Setting the pause time 001~600 X 100 msec 001~600 050 Selects the pause time in 100 msec steps.502 Setting the flash recall time 01~99 X 10 msec 01~99 10 Selects the line break time during flashing in 10

msec steps.503 Setting the pulse dial

speed1:10pps 2:20pps 1, 2 1 Sets the pulse dial speed.

510 VOX time 1:6 sec 2:4 sec 1, 2 1 Setting of the end of call confirmation time byVOX.

514 Bell detection time X 100 msec 1~9 6 ----------520 Setting the CED frequency 1:2100Hz 2:1100Hz 1, 2 1 When international communications cannot be

performed smoothly select 1100Hz. Howeversome exchange system should not beaccopted (1100Hz on CED). (Refer to "5. Unitcan copy, but cannot transmit/receive longdistance or international communications" inDEFECTIVE FACSIMILE SECTION (P.67).)

521 Setting the internationalline mode

1:ON 2:OFF 1, 2 1 Selects the international line mode during FAXcommunication. (Refer to "5. Unit can copy, butcannot transmit/receive long distance orinternational communications" in DEFECTIVEFACSIMILE SECTION (P.67).)

522 Setting the return to defaultmode

1:ON 2:OFF 1, 2 1 Set the resolution and contrast conditions forFAX or copy to the default settings.

523 Receive equalizer select 1:0km 2:1.8km3:3.6km 4:7.2km

1~4 1 When the telephone station is far from the unitor reception cannot be performed correctly,adjust accordingly.

524 Transmission equalizerselect

1:0km 2:1.8km3:3.6km 4:7.2km

1~4 1 When the telephone station is far from the unitor reception cannot be performed correctly,adjust accordingly.

533 Setting the number of timethat message transfer isredialed

00~99 00~99 03 times Selects the number of times that messagetransfer is redialed (not including the firstdialing).

534 Setting the messagetransfer/paper call redialinterval

001~999 sec 001~999 065 sec Sets the interval of message transfer/pager callredial.

544 Selecting the documentfeed position (KX-FT906HG-B)

01~99 step 01~99 48 When the ADF function is incorrect, adjust thefeed position. (8 step = 1mm) If it is difficult tofeed documents, raise the set value. If multidocument feed occurs, lower the set value.

544 Selecting the documentfeed position (KX-FT908HG-B)

01~99 step 01~99 50 When the ADF function is incorrect, adjust thefeed position. (8 step = 1mm) If it is difficult tofeed documents, raise the set value. If multidocument feed occurs, lower the set value.

550 Memory clear Refer to TEST FUNCTIONS (P.48)551 ROM version and sum check Refer to TEST FUNCTIONS (P.48)552 DTMF signal tone test 1:ON 2:OFF 1, 2 2 Refer to TEST FUNCTIONS (P.48)553 Setting the FAX monitor

function1: OFF 2:PHASE B3:ALL

1, 2, 3 1 Sets whether to monitor the line signal with theunit´s speaker during FAX communication ornot.

554 Modem test Refer to TEST FUNCTIONS (P.48)555 Scanner test Refer to TEST FUNCTIONS (P.48)556 Motor test Refer to TEST FUNCTIONS (P.48)557 LED test Refer to TEST FUNCTIONS (P.48)558 LCD test Refer to TEST FUNCTIONS (P.48)559 Setting the document jam

detection1:ON 2:OFF 1, 2 1 Selects the jam detection of a document during

FAX transmission/copying.560 Cutter selection (KX-

FT908HG-B)1:ON 2:OFF 1, 2 1 Turns OFF the cutter function.

561 KEY test Refer to TEST FUNCTIONS (P.48)562 Cutter test (KX-FT908HG-

B)Refer to TEST FUNCTIONS (P.48)

570 Setting the % break 1:61% 2:67% 1, 2 2 Sets the % break of pulse dialing.571 Setting the number of

times that ITS is redialed00~99 00~99 10times Selects the number of times that ITS is redialed

(not including the first dial).572 Setting the ITS redial

interval001~999 sec 001~999 065 sec Sets the interval of ITS redialing.

573 Setting of number of ringsfor REMOTE TURN ON

01~99 01~99 10 times Sets the number of rings before the unit startsto receive a document in the TEL mode.

580 TAM continuous tonedetection

1:ON 2:OFF 1, 2 1 ON: Stops TAM operation when Dial tone, etc.are detected.

590 Setting the number of FAXredial times

00~99 00~99 05 times Selects the number of redial times during FAXcommunication (not including the first dial).

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Code Function Set Value Effective Range Default Remarks591 Setting the FAX redial

interval001~999 sec 001~999 065 sec Sets the FAX redial interval during FAX

communication.592 Designation of CNG

sending1: OFF 2:ALL 3:AUTO 1, 2, 3 2 Lets you select the CNG output during FAX

transmission. ALL: CNG is output at phase A.AUTO: CNG is output only when automaticdialing is performed. OFF: CNG is not output atphase A.

593 Setting the intervalbetween CED and the 300bps signal

1: 75 msec 2:500msec 3:1000 msec

1, 2, 3 1 Sets the interval between the CED signal andsubsequent 300 bps signal. (Refer to "5. Unitcan copy, but cannot transmit/receive longdistance or international communications" inDEFECTIVE FACSIMILE SECTION (P.67).)

594 Setting the overseas DISdetection

1: Detects on the 1sttime.2: Detects on the2nd time.

1, 2 1 Sets the recognition format of the DIS signal.1:Detects the first DIS signal sent from thereceiver during FAX transmission. 2:Ignoresthe first DIS signal sent from the receiver duringFAX transmission. (Refer to "5. Unit can copy,but cannot transmit/receive long distance orinternational communications" in DEFECTIVEFACSIMILE SECTION (P.67).)

595 Setting an acceptablereception error value

001~999 X number oftimes

001~999 100 Sets the number of acceptable error lines whenthe FAX reconstructs the received data.

596 Setting the transmit level - 15~00 15~00 10 Selects the FAX transmission level.598 Receiving Sensitivity - 43dBm 20~48 42 (Refer to "5. Unit can copy, but cannot

transmit/receive long distance or internationalcommunications" in DEFECTIVE FACSIMILESECTION (P.67).)

710 Memory clear exceptHistory data

To reset the value to the default one, exceptHistory data. Please restart a power supplyafter clearing a memory.

717 Transmit speed select 1:9600BPS2:7200BPS3:4800BPS4:2400BPS

1~4 1 Adjusts the speed to start training during FAXtransmission.

718 Receive speed select 1:9600BPS2:7200BPS3:4800BPS4:2400BPS

1~4 1 Adjusts the speed to start training during FAXreception.

719 Ringer off in TEL/FAXmode

1:ON 2:OFF 1, 2 1 Sets the ringer switch off when a call isreceived in the TEL/FAX mode.

721 Pause tone detect 1:ON 2:OFF 1, 2 1 Selects the tone detection for pauses in dialing.722 Redial tone detect 1:ON 2:OFF 1, 2 1 Selects the tone detection mode after redialing.731 CPC mode 1:A 2:B 3:OFF 1, 2, 3 1 Set the CPC signal detection mode from the

converter.763 CNG detect time 1:10 sec 2:20 sec

3:30 sec1, 2, 3 2 Selects the CNG detection time of friendly

reception.771 T1 timer 1:35 sec 2:60 sec 1, 2 2 Sets a higher value when the response from

the other party needs more time during FAXtransmission.

774 T4 timer 00~99 00~99 00775 Monitoring of message

transfer1:ON 2:OFF 1, 2 2 If set to ON a message can be monitored from

this unit´s SP-PHONE when transferring amessage.

784 Voice prompt test Refer to TEST FUNCTIONS (P.48)815 Sensor check Refer to TEST FUNCTIONS (P.48)841 Digital SP-Phone check Refer to DIGITAL SPEAKERPHONE (P.153).874 DTMF on time 060~200 ms 060~200 090 ----------875 DTMF off time 060~200 ms 060~200 090 ----------882 Journal 3 list Refer to JOURNAL 3 (P.87).

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7.4. TEST FUNCTIONSTest Mode Type of Mode Code Function

Operation after codeinput

PRINT TEST Service Mode “8” “5” Prints a test pattern and checks the thermal head for abnormalities (missing dots,etc), and also checks the operation of the reception motor.(Refer to PRINT TESTPATTERN (P.49).)

START

MOTOR TEST Service Mode “5” “5” “6” Rotates the transmission and reception motors to check the operation of themotors.0.....Stop1.....Turn forward TX roller at 400pps 2-2 phase2.....Turn forward TX roller at 400pps 1-2 phase3.....Turn forward RX roller at 400pps 2-2 phase4.....Turn forward RX roller at 400pps 1-2 phase5.....Turn forward TX/RX roller at 400pps 1-2 phase6.....Reverse the motor at 400pps 1-2 phase7.....Set the cam gear to the home position8.....Set the cam gear to the RX mode9.....Set the cam gear to the copy modepress the STOP button to cancel.

START

MODEM TEST Service Mode “5” “5” “4” Sends four kinds of FAX signals to check the sending function of the modem.1)1100 Hz: Consecutive signal of EOM for tonal2)2100 Hz: G2 carrier signalConsecutive of CED signal

3)G3,V29 training signal [modulation wave of carrier signal (1700 Hz )]

START

ROM CHECK Service Mode “5” “5” “1” Indicates the version and checks the sum of the ROM.START

SCAN CHECK Service Mode “5” “5” “5” Turns on the LEDs of the image sensor and operates the read systems. Refer toREAD SECTION (P.106)START

LCD CHECK Service Mode “5” “5” “8” Check the LCD indication.Illuminates all the dots to check if they are normal.Refer to OPERATION PANEL SECTION (P.165)START

DTMF SINGLE TEST Service Mode “5” “5” “2” Outputs the DTMF as single tones. Used to check the frequencies of theindividual DTMF tones. Refer to DTMF SINGLE TONE TRANSMIT SELECTION(P.49).

1....ON2....OFF

KEY CHECK Service Mode “5” “6” “1” Checks the button operation.Indicates the button code on the LCD while the button is pressed. Refer toBUTTON CODE TABLE (P.49).Refer to OPERATION PANEL SECTION (P.165)

START (any key)

CUTTER TEST Service Mode “5” “6” “2” Checks the cutter operation. (KX-FT908HG-B ONLY)START

FACTORY SET Service Mode “5” “5” “0” To reset the value to the default one, except time/day (#001), logo (#002), Faxno. (#003), History and Directory data.Please restart a power supply after clearing a memory.

START

VOICE PROMPT TEST Service Mode “7” “8” “4” You can hear the voice prompt from speaker afer pressing “START”keySTART

SENSOR CHECK &VOX CHECK

Service Mode “8” “1” “5” CHECK THE SENSOR OPERATIONAfter entering this mode, perform the copy operation.For each sensor’s operation, refer to SENSORS AND SWITCHES(P.129).Do Sn Pa : LCD DISPLAY

Do: Document set sensor:Paper inserted. Turns on when a document is inserted.

Sn: Read position sensor.:At the read position, turns on when the front cover is opened and thesensor lever is pressed directory.

Pa: Recording Paper Sensor:Set Recording Paper. Turns on and off when the cassette lock lever ispushed down and up.

START

LED CHECK Service Mode “5” “5” “7” Turn on the message LED.START

DIGITALSPEAKERPHONE RX& TX CHECK

Service Mode “8” “4” “1” Please refer to DIGITAL SPEAKERPHONE (P.153)SPEAKERPHONE

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When set to ON (=1), the 12 keys and transmissionfrequencies are as shown.

key High Frequency (Hz) key Low Frequency (Hz)“1” 697 “5” 1209“2” 770 “6” 1336“3” 852 “7” 1477“4” 941 “8” 1633

When set to OFF (=2), the 12 keys and transmissionfrequencies are as shown.

High (Hz) 1209 1336 1477Low (Hz)697 “1” “2” “3”770 “4” “5” “6”852 “7” “8” “9”941 “ ” “0” “#”

7.4.1. DTMF SINGLE TONE TRANSMIT SELECTION

Note:

After performing this check, do not forget to turn the setting off.

Otherwise, dialing in DTMF signal will not work.

7.4.2. BUTTON CODE TABLE

Code Button Name Code Button Name Code Button Name03 AUTO ANSWER 1D LOWER 00 NO INPUT04 FAX/START 31 1 01 STOP05 MENU 32 2 5A STATION 107 HELP 33 3 5B STATION 208 SP-PHONE 34 4 5C STATION 309 COPY 35 5 5D STATION 40A MUTE 36 6 5E STATION 50B PREV 37 7 5F STATION 60C NEXT 38 8 60 STATION 70D VOLUME 39 9 61 STATION 80E VOLUME 3A 0 62 STATION 914 RECORD 3B 63 STATION 1016 ERASE 3C # 64 STATION 1118 PLAY MESSAGE 3D REDIAL/PAUSE1C CALLER ID 3E FLASH

Note:

These codes (00, 01) are only for the data in the History Report.

7.4.3. PRINT TEST PATTERN

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7.4.4. REMOTE PROGRAMMING

If, after the call is connected, the customer describes the situation and it is determined that the problem can be corrected bymaking parameter changes, this function makes it possible to change parameters such as the user code and service code fromanother fax (using DTMF tones). Therefore, travel to the customer´s location is not required. However, it is not possible tochange all the parameters remotely (Refer to PROGRAM MODE TABLE (P.51)). The function used to accomplish this isremote programming.

First, in order to check the current status of the service code parameter, out put the setup list (code: 991) and service list (code:999) from the customer´s fax machine. Based on this, the parameters for the desired codes can be changed. The procedurefor changing and listing parameters is described on ENTERING THE REMOTE PROGRAMMING MODE AND CHANGINGSERVICE CODES (P.50). Also, before exiting the remote programming mode, it is advisable to obtain a new list to confirm thatonly the desired parameters were changed.

Hint:

Since the connected telephone is in use during the remote programming mode, it may be helpful to ask the customer to switchto the speakerphone (except for a digital speakerphone). This frees the customer from the need to remain right next to the faxwhile you are making parameter settings. When finished, inform the customer. Also note that in very noisy locations where theDTMF tones are not audible, the remote programming function will not work.

7.4.4.1. ENTERING THE REMOTE PROGRAMMING MODE AND CHANGING SERVICECODES

CROSS REFERENCE:

PROGRAM MODE TABLE (P.51)

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7.4.4.2. PROGRAM MODE TABLE

Code Function Set Value Default Remote setting001 Set the date and time mm/dd/yy AM/PM --------- NG002 Your logo --------- --------- NG003 Your FAX number --------- --------- NG004 Print transmission report ERROR/ON/OFF ERROR OK005 Auto answer 1:TEL/FAX / 2:FAX ONLY / 3:TAD/FAX TAD/FAX OK006 TAD/FAX ring count 1~4:TOLL SAVER/RINGER OFF 2 OK007 FAX ring count 1 to 4 rings 2 ring OK009 TEL/FAX delayed ring 1 to 4 rings 2 ring OK010 Recording time VOX/1 MIN VOX OK011 Remote ANS ID --------- ID=111 NG013 Dialing mode 1:PULSE / 2:TONE TONE OK022 Journal auto print 1:ON 2:OFF ON OK023 Overseas mode 1:ON 2:OFF OFF OK025 Delayed send 1:ON 2:OFF OFF NG026 Auto caller ID list 1:ON 2:OFF ON OK030 Silent FAX recognition ring 3 to 9 rings 3 rings OK036 RCV reduction 1:ON 2:OFF ON OK039 LCD contrast NORMAL/DARKER NORMAL NG041 FAX activation code 1:ON 2:OFF ON/ID=*#9 NG042 Message alert 1:ON 2:OFF OFF OK043 REC. time alert 1:ON 2:OFF OFF OK046 Friendly reception 1:ON 2:OFF ON OK047 Voice guidance 1:ON 2:OFF ON OK048 Language 1:HUNGARIAN / 2:ENGLISH ENGLISH OK049 Auto disconnect 1:ON 2:OFF ON/ID=*0 NG054 Common greeting MSG. REC. time 16s/60s 16s OK058 Original setting NORMAL/LIGHT/DARKER NORMAL OK059 Print contrast NORMAL/DARKER NORMAL OK060 Message transfer 1:ON 2:OFF OFF NG061 Transfer greeting CHECK/RECORD/ERASE CHECK NG067 ICM monitor 1:ON 2:OFF ON OK070 Pager call 1:ON 2:OFF OFF NG076 Connecting tone 1:ON 2:OFF ON OK080 Set the default YES/NO NO NG501 Pause time set 001~600 X 100 msec 050 OK502 Flash time set 01~99 X 10 msec 10 OK503 Dial speed set 1:10pps 2:20 pps 10 OK510 Vox time 1:6sec 2:4sec 6sec OK514 Bell detection time 1~9 x 100msec 6 x 100msec OK520 CED frequency select 1:2100Hz 2:1100Hz 2100 OK521 International mode select 1:ON 2:OFF ON OK522 Auto standby select 1:ON 2:OFF ON OK523 Receive equalizer select 1:0km 2:1.8km 3:3.6km 4:7.2km 0km OK524 Transmission equalizer select 1:0km 2:1.8km 3:3.6km 4:7.2km 0km OK533 Setting the number of times that message transfer is redialled. 00~99 03 OK534 Setting of the message transfer/pager call redial interval 001~999 065 OK544 Document feed position adjustment value set (KX-FT906HG-B) 01~99 step 48 OK544 Document feed position adjustment value set (KX-FT908HG-B) 01~99 step 50 OK550 Memory clear Press "START". --------- NG551 ROM check Press "START". --------- NG552 DTMFsignal tone test 1:ON 2:OFF OFF NG553 Monitor on FAX communication select 1:OFF 2:P-B 3:ALL OFF OK554 Modem test Press "START". --------- NG555 Scanner test Press "START". --------- NG556 Motor test Press "START". --------- NG557 LED test Press "START". --------- NG558 LCD test Press "START". --------- NG559 Document jam detection select 1:ON 2:OFF ON OK560 Cutter selection (KX-FT908HG-B ONLY) 1:ON 2:OFF ON OK561 Key test Press any key. --------- NG562 Cutter test (KX-FT908HG-B ONLY) "START" push --------- NG570 Break % select 1:61% 2:67% 67% OK571 ITS auto redial time set 00~99 10 OK572 ITS auto redial line disconnection time set 001~999 set 065 OK573 Remote turn-on ring number set 01~99 10 OK

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Code Function Set Value Default Remote setting580 TAM continuous tone detection 1:ON/2:OFF ON OK590 FAX auto redial time set 00~99 05 OK591 FAX auto redial line disconnection time set 001~999 065 OK592 CNG transmit select 1:OFF/2:ALL/3:AUTO ALL OK593 Time between CED and 300 bps 1:75/2:500/3:1s 75 ms OK594 Overseas DIS detection select 1:1st/2:2nd 1st OK595 Receive error limit value set 001~999 100 OK596 Transmit level set 15~00 10 OK598 Receiving Sensitivity 20~48 42 OK710 Memory clear except History data --------- --------- NG717 Transmit speed select 1:9600/2:7200/3:4800/4:2400bps 9600bps OK718 Receive speed select 1:9600/2:7200/3:4800/4:2400bps 9600bps OK719 Ringer off in TEL/FAX mode 1:ON/2:OFF ON OK721 Pause tone detect 1:ON/2:OFF ON OK722 Redial tone detect 1:ON/2:OFF ON OK731 CPC mode 1:A / 2:B / 3:OFF A OK763 Friendly reception CNG detection select 1:10S/2:20S/3:30S 20S OK771 T1 timer 1:35 sec/2:60 sec 60 sec OK774 T4 timer 00~99 X 100ms 00 OK775 Monitoring of message transfer 1:ON/2:OFF OFF OK815 Sensor check Press "START". --------- NG841 Digital SP-Phone RX & TX check 1: SP-Phone --------- NG874 DTMF ON time 060~200 ms 090ms OK875 DTMF OFF time 060~200 ms 090ms OK882 Journal 3 1: START --------- NG991 Transmit basic list 1: START --------- OK992 Transmit advanced list 1: START --------- OK994 Transmit journal report 1: START --------- OK999 Transmit service list 1: START --------- OK

OK : Can set the value by the remote programming feature or print a list.

NG : Cannot set the value.

Note:

Note: Refer to SERVICE FUNCTION TABLE (P.46) for descriptions of the individual codes.

For example, the "004 Transmission report mode" set value "1:ERROR/2:ON/3:OFF" number corresponds to the numberdialled.

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7.4.5. USER MODE (The list below is an example of the SYSTEM SETUP LIST the unitprints out.)

7.4.5.1. KX-FT906HG-B

Note:

The above values are the default values.

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7.4.5.2. KX-FT908HG-B

Note:

The above values are the default values.

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7.4.6. SERVICE MODE SETTINGS (Example of a printed out list)

7.4.6.1. KX-FT906HG-B

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7.4.6.2. KX-FT908HG-B

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7.5. TROUBLESHOOTING DETAILS

7.5.1. OUTLINE

Troubleshooting guide provides a logical path of deduction to assist in locating a fault and suggests methods of restoring the unitto full working condition. Use the reported symptoms of the fault to determine the best troubleshooting method. Even difficult faultscan be tracked to a specific block or area, for example, the "Digital Board" or "Image Sensor".A variety of fault descriptions from customers often point to the same area and, for this reason, careful analysis of the reported

symptoms is required. After every repair, test all functions to ensure no problems are evident.

7.5.2. STARTING TROUBLESHOOTING

Select the appropriate troubleshooting method according to the symptoms.

CROSS REFERENCE:

SIMPLE CHECK LIST (P.58)

DIGITAL BOARD SECTION (P.88)

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7.5.3. TROUBLESHOOTING ITEMS TABLE

FUNCTION SYMPTOM REFERENCEPrinting Skewed receiving image See SKEWED RECEIVING IMAGE (P.64)

Expanded print See EXPANDER PRINT (WHEN PRINTING) (P.65)Image is distorted See IMAGE IS DISTORTED (WHEN PRINTING) (P.63)Black or White vertical lines appear. See BLACK OR WHITE VERTICAL LINES APPEAR (P.64)

ADF(Auto Document Feeder)

No feed See NO DOCUMENT FEED (P.59)Paper jam See DOCUMENT JAM (P.60)Multiple feed See MULTIPLE FEED (P.61)Skew See SKEW (P.62)

Abnormal mechanical sound Abnomal sound from the product See WHEN COPYING OR PRINTING, AN ABNORMAL SOUNDIS HEARD FROM THE UNIT (P.65)

Power supply Voltage output is abnormal. See POWER SUPPLY BOARD SECTION (P.102)Operation panel keys are not accepted. See OPERATION BOARD SECTION (P.105)

Sensor If the electric circuit is the cause, “REMOVEDOCUMENT” will be displayed.

See SENSOR SECTION (P.106)

CommunicationFAX, TEL

(Analog/Digital board)

Cannot communicate by fax. See DEFECTIVE ITS (INTEGRATED TELEPHONE SYSTEM)SECTION (P.101)

Error code is displayed. See HOW TO OUTPUT THE JOURNAL REPORT: (P.77)Cannot talk. See ANALOG BOARD SECTION (P.99)DTMF tone doesn’t work.Handset/Monitor sound, volume

7.5.3.1. SIMPLE CHECK LIST

SERIAL NO. DATEFUNCTION JUDGEMENT REFERENCE

FAX operation Transmission OK / NG

Receiving OK / NG

Copy operation FINE mode OK / NG

PHOTO mode OK / NG

Telephone operation Handset transceiver / receiver OK / NG

Monitor sound OK / NG

Ringer sound OK / NG

Dial operation OK / NG

Volume operation OK / NG

Operation Panel Key check OK / NG Service code #561(Refer to TEST FUNCTIONS (P.48).)

LCD check OK / NG Service code #558(Refer to TEST FUNCTIONS (P.48).)

LED check OK / NG Service code #557(Refer to TEST FUNCTIONS (P.48).)

Sensor Sensor check OK / NG Service code #815(Refer to TEST FUNCTIONS (P.48).)

Clock OK / NG Is the time kept correctly?Check with another clock.

External Telephone Handset transceiver/receiver OK / NG

Remote control OK / NG Change to FAX receiving by pressing * 9.(Refer to code no. 041.on PROGRAM MODETABLE (P.51).)

Note:

• • • • Check according to the sevvice code referring to the TEST FUNCTIONS (P.48).

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7.5.4. ADF (AUTO DOCUMENT FEED) SECTION

7.5.4.1. NO DOCUMENT FEED

CROSS REFERENCE:

DIGITAL BOARD SECTION (P.88)

POWER SUPPLY BOARD SECTION (P.102)

SENSOR SECTION (P.106)

TEST FUNCTIONS (P.48)

DISASSEMBLY INSTRUCTIONS (P.27)

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7.5.4.2. DOCUMENT JAM

CROSS REFERENCE:

SENSOR SECTION (P.106)

DISASSEMBLY INSTRUCTIONS (P.27)

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7.5.4.3. MULTIPLE FEED

When using thick paper etc., If the document will not feed.

CROSS REFERENCE:

DISASSEMBLY INSTRUCTIONS (P.27)

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7.5.4.4. SKEW

CROSS REFERENCE:

DISASSEMBLY INSTRUCTIONS (P.27)

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7.5.4.5. IMAGE IS DISTORTED (WHEN PRINTING)

CROSS REFERENCE:

READ SECTION (P.106)

THERMAL HEAD SECTION (P.108)

TEST FUNCTIONS (P.48)

DISASSEMBLY INSTRUCTIONS (P.27)

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7.5.4.6. BLACK OR WHITE VERTICAL LINES APPEAR

CROSS REFERENCE:

DIGITAL BOARD SECTION (P.88)

TEST FUNCTIONS (P.48)

7.5.4.7. SKEWED RECEIVING IMAGE

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7.5.4.8. EXPANDER PRINT (WHEN PRINTING)

CROSS REFERENCE:

DISASSEMBLY INSTRUCTIONS (P.27)

7.5.4.9. WHEN COPYING OR PRINTING, AN ABNORMAL SOUND IS HEARD FROM THEUNIT

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CROSS REFERENCE:

DISASSEMBLY INSTRUCTIONS (P.27)

7.5.5. COMMUNICATION SECTION

Find the problem in the table shown below, and refer to the corresponding troubleshooting procedure in DEFECTIVEFACSIMILE SECTION (P.67).

No. Symptom Content Possible cause1 The paper is not fed properly when faxing.

(Copying is also not possible.)Troubleshooting Problem with the feeding

mechanism.2 The fax usually transmits successfully but sometimes

fails. (Copying is possible.)Troubleshooting Problem with the service line or

with the receiver´s fax.3 The fax receives successfully one time and fails another.

(Copying is possible.)Troubleshooting Problem with the service line or

with the transmitter´s fax.4 The fax completely fails to transmit or receive.

(The unit can copy documents.)Troubleshooting Problem with the electric circuit.

5 The fax fails either to transmit or receive when making along distance or an international call.(The unit can copy documents.)

Detailed description of thepossible causes (Similar totroubleshooting items No.2and No.3.)

Problem with the service line.

6 No.1-No.5 The troubleshootingprocedure for each errorcode will be printed on thecommunication resultreport.

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Refer to TRANSLATION LISTS (P.3)

7.5.5.1. DEFECTIVE FACSIMILE SECTION

7.5.5.1.1. TRANSMIT PROBLEM

CROSS REFERENCE:

ADF (AUTO DOCUMENT FEED) SECTION (P.59)

OPERATION BOARD SECTION (P.105)

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Refer to TRANSLATION LISTS (P.3)

7.5.5.1.2. SOMETIMES THERE IS A TRANSMIT PROBLEM

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7.5.5.1.3. RECEPTION PROBLEM

Confirm the following before starting troubleshooting.Is the recording paper installed properly?

There is the receiving problem when sometimes the below errors may be occurred.

OUT OF PAPERCHHECK COVERUNIT OVERHEATED (If it doesn´t return automatically, COVER OPEN, etc., reset the unit.)CHECK DOCUMENT

Please refer to USER RECOVERABLE ERRORS (P.43) for the above items.Also, when a hardware deformity occurs, please check each sensor.

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7.5.5.1.4. THE UNIT CAN COPY, BUT CANNOT TRANSMIT/RECEIVE

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7.5.5.1.5. UNIT CAN COPY, BUT CANNOT TRANSMIT/RECEIVE LONG DISTANCE ORINTERNATIONAL COMMUNICATIONS

The following 2 causes can be considered for this.

Cause 1:

The other party is executing automatic dialling, the call has been received by this unit, and the CED or DIS signal responsetime is too long. (In most cases, this unit detects the CNG signal and can respond to the CED or DIS.) (According to the ITU-T standard, the communication procedure is stopped when there is no response from the other party within 35 sec, so thatthe other party releases the line.)

(Cause and Countermeasure)

As shown in the chart above, the total handshaking time must be reduced. Long distance connection and linking of severalstations means the line connection time cannot be reduced. Accordingly, the following countermeasures should be attempted.(A) The TEL/FAX DELAYED RING count should be 1. (User parameter: code No. 78)(B) As the 35 sec. count starts directly after dialing or directly after the START button has been pressed for models with aSTART button, the other party should be called manually, if possible.Another possibility is entering two pauses at the end of the auto dial number on the transmission side. Then the count start timewill be delayed for 2 pauses (about 10 sec.).

Cause 2:

Erroneous detection due to an echo or echo canceler.

(Echo/Echo Canceler)

The signal from FAX1 reaches FAX2 via the stations 1 and 2, but the reflection signal at station 2 also returns via station1(echo). As the distance between station 1 and station 2 is far, the echo returns to FAX 1 a max. of 600 msec aftertransmission. There is a possibility that this signal is detected erroneously as the signal from FAX2. For a normal call, there isa possibility that the echo of their own voice will make the call difficult to understand. For this reason, each station (station 1,station 2) attaches echo cancellers (S1, S2) for international lines or long distance lines. For the echo canceller, the level of thetransmission signal from FAX 1 is compared with the level of the reception signal from FAX2. When the S1 is closed and S2is open, so that the echo does not return to FAX1.

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(Causes and Countermeasures)

Fig. a (Overlapping the Echo of the DIS signal and DCS signal)

Fig. b (Countermeasure by Changing the CED Frequency)

No. Countermeasure Side Echo Communication Problem Example Countermeasure Service Code1 Sending side Some time is needed to compare the level

of the receiving and sending signals for theecho canceler. The header of the trainingsignal lacks due to a switching delay toclose S1.

Add a dummy signal to the beginningof the training signal.

Service code (521)(International mode select)

This countermeasurebecomes the default value.

2 Receiving side The echo canceler function stopsaccording to a CED signal frequency of2100Hz (S1 and S2 are both ON), a DISsignal is returned as an echo, and a DCSsignal from the sending side overlaps theDIS echo. Then the receiving side FAXcannot retrieve the DCS signal.(Refer to Fig. a)

Change to a 1100Hz CED signalfrequency. (Refer to Fig. b)

Service code (520)(CED frequency select)

Receiving side Change the regular rime of 75 msecbetween the CED signal and DIS signalto 500 msec. This will give at least 250msec to recover the echo canceleroperation. (Refer to Fig. c)

Service code (593)(Time between CED and 300

bps)

Sending side The sending side FAX sends a DCSsignal not after receiving the 1st DISsignal but after receiving the 2nd DISsignal. (Refer to Fig. d)

Service code (594)(Overseas DIS detection

select)

3 Sending side Communication failure occurs in a longdistance communication on the telephoneline without an echo canceler.

or

There are some cases (e.g. Mobil comms.)which cause the collision of TX / RX signalsdue to the delay / echo and noise of thenetwork / terminal. (Refer to Fig. e)

Decrease the transmission level from -10 dBm to -15 dBm and the echo levelwill decrease.

Service code (596)(Transmit level set)

4 Sending sideReceiving side

Decrease the receiving sensitivity from-13 dBm to about -32 dBm so an echosignal will not received.

Service code (598)(Receiving sensitivity)

5 Sending sideReceiving side

Set additional Pause time (Servicemode: code No. 774) in between theoriginal and its repeated signals, toprevent the collision of the signals atboth end.

Service code (774)(T4 timer)

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Fig. c (Countermeasure by Changing the Interval Between CED andDIS)

Fig. d (C3ountemeasure by Ignoring the 1st DIS)

<TX side signal> <RX side signal> <Countermeasure>2nd / 3rd DCS / Training & delayed CFR / FTT at TX side2nd / 3rd EOP / EOM / MPS & delayed MCF / PIP / PIN / RTP / RTN at TX sidedelayed DCS & 2nd / 3rd / --- DIS at RX side

(Fig. e)

7.5.5.1.6. THE UNIT CAN COPY, BUT THE TRANSMISSION AND RECEPTION IMAGE AREINCORRECT

(Long distance or international communication operation)

This symptom highly depends on the transmission and reception capability of the other FAX unit and the line conditions.

The countermeasures for this unit are shown below.

Transmission Operation:

Set the transmitting speed to 4800BPS (service mode: code No. 717) or select the overseas mode.

Reception Operation:

If 80% or more of the reception is incorrect, set the receiving speed to 4800BPS. (Service mode: code No. 718)

• • • • Refer to SERVICE FUNCTION TABLE(P.46).

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1. Equipment

• • • • 1 jig

• • • • 1 PC (with LINE IN)

• • • • 1 audio cord (mini jack supported)

• • • • 2 tel cords

Parts No. Parts Name &Description

Qt’y

PQJJ1T004Z JACK1, JACK2 2PQJJ1D010Z PIN JACK 1ECQE2155KForECQE2E155KC

CAPACITOR 2

MA4020 DIODE 2

7.5.5.1.7. HOW TO RECORD FAX SIGNAL BY USING PC

Recording FAX signal is one of the useful analysis measures to solve communication problems.

The way of recording easily by using PC is shown as follows.

2. Setting up

FAX SIGNAL RECORDING JIG

3. Connecting PC and JIG

4. PC setting and recording

1. Set LINE IN to be valid in the volume control setting.

Refer to the PC instruction book.

2. Start up the PC software “ SOUND RECORDER”. (This software is bundled to Windows OS, which can create WAV file.)

Set the audio format “ PCM 22.050kHz, 8bit, mono”.

3. Click the record button and start recording after acquisition the signal.

Note:

• • • • Not to be wind wave patterns on the wave monitor.

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• • • • Please compress the recording data when you send attaching to E-Mail because the data size will be so heavy.

• • • • Any software which can create WAV files is available.

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1. Equipment

• • • • 1 jig

• • • • 1 PC (with LINE IN)

• • • • 1 audio cord (mini jack supported)

• • • • 2 tel cords

Parts No. Parts Name &Description

Qt’y

PQJJ1T004Z JACK1, JACK2 2PQJJ1D010Z PIN JACK 1ECQE2155KForECQE2E155KC

CAPACITOR 2

MA4020 DIODE 2

7.5.5.1.8. HOW TO RECORD FAX SIGNAL BY USING PC

Recording FAX signal is one of the useful analysis measures to solve communication problems.

The way of recording easily by using PC is shown as follows.

2. Setting up

FAX SIGNAL RECORDING JIG

3. Connecting PC and JIG

4. PC setting and recording

1. Set LINE IN to be valid in the volume control setting.

Refer to the PC instruction book.

2. Start up the PC software “ SOUND RECORDER”. (This software is bundled to Windows OS, which can create WAV file.)

Set the audio format “ PCM 22.050kHz, 8bit, mono”.

3. Click the record button and start recording after acquisition the signal.

Note:

• • • • Not to be wind wave patterns on the wave monitor.

• • • • Please compress the recording data when you send attaching to E-Mail because the data size will be so heavy.

• • • • Any software which can create WAV files is available.

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Error code table:

Refer to TRANSLATION LISTS (P.3)

TRANS=TRANSMISSION RECEP=RECEPTION

7.5.5.1.9. HOW TO OUTPUT THE JOURNAL REPORT:

1. Press repeatedly until the following is displayed.

2. Press .

3. Press or until the “ JOURNAL REPORT ” is displayed.

4. The report is printed out.

(1) CODE (2) RESULT (3) MODE SYMPTOM Counter-measure*

PRESSED THE STOP KEY SND & RCV Communication was interrupted by the STOP button.DOCUMENT JAMMED SND The document paper is jammed.NO DOCUMENT SND No document paper.PRINTER OVERHEATED RCV The thermal head is overheated.PAPER OUT RCV Out of thermal paper or the cover is open.

28 COMMUNICATION ERROR SND & RCV -40 OTHER FAX NOT RESPOND SND Transmission is stopped when the T1 TIMER expires.41 COMMUNICATION ERROR SND DCN is received after DCS transmission. 142 COMMUNICATION ERROR SND FTT is received after transmission of a 2400BPS training signal. 243 COMMUNICATION ERROR SND No response after post message is transmitted three times. 344 COMMUNICATION ERROR SND RTN and PIN are received. 446 COMMUNICATION ERROR SND No response after FTT is transmitted. 548 COMMUNICATION ERROR SND No post message. 649 COMMUNICATION ERROR SND RTN is transmitted. 750 COMMUNICATION ERROR SND PIN is transmitted (to PRI-Q). 851 COMMUNICATION ERROR SND PIN is transmitted. 852 OTHER FAX NOT RESPOND SND Reception is finished when the T1 TIMER expires. 853 ERROR-NOT YOUR UNIT RCV DCN is received after transmission of NSC and DTC. 954 ERROR-NOT YOUR UNIT RCV DCN is received after transmission of NSC . 1057 COMMUNICATION ERROR SND 300bps error 1158 COMMUNICATION ERROR RCV DCN is received after FTT transmission. 1259 ERROR-NOT YOUR UNIT SND DCN responds to a post message. 1364 COMMUNICATION ERROR SND Polling is not possible. 1468 COMMUNICATION ERROR RCV No response at the other party after MCF or CFR is transmitted. 1570 ERROR-NOT YOUR UNIT RCV DCN is received after CFR transmission. 1372 COMMUNICATION ERROR RCV The carrier is cut when the image signal is received. 13FF COMMUNICATION ERROR SND & RCV Modem error. 12

a. Change the TX speed/RX speed. (Service code: 717/718, refer to SERVICE FUNCTION TABLE (P.46).)

b. Change the transmit level. (Service code: 596, refer to SERVICE FUNCTION TABLE (P.46).)

If the problem remains, see the next page.

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Countermeasure

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Example:

7.5.6. OTHER

[HISTORY]

No. Display Function1 DATA Date and time which are set by a user for the first time after purchase. TIME is

the expiration from the first power on after purchase.2 KEY OPERATION Indicate 2-digit codes. (Refer toBUTTON CODE TABLE (P.49).1st.50: History

of the key operation from 1st to 50th after purchase. Last.50: History of the last50 key operations.

3 NUMBER of COPY The number of pages copied..4 NUMBER of RX The number of pages received.5 NUMBER of TX The number of pages sent.

CROSS REFERENCE:

BUTTON CODE TABLE (P.49)

7.5.7. SPECIAL SERVICE JOURNAL REPORTS

Journal 3 shown below, which are special journals giving the additional detailed information about the latest 35 communications,can be printed by Service Code 882. Remote printing function for the journal reports (JOURNAL and JOURNAL 3) is alsoavailable for service technicians. (Refer to REMOTE PROGRAMMING (P.50).) The JOURNAL report only gives you basicinformation about a communication, but the JOURNAL 3 report provide different information on the same item (communication).

HOW TO READ JOURNAL REPORTS:

1. Look at NO. 01 in the JOURNAL. If you want to know about the details about that item, see NO. 01 in the JOURNAL 3. Youcan get the following information.

* MODE: Fax transmission* TX SPEED: 9.6 kbps* RESOLUTION: standard* ENCODE: MH* MAKER CODE: 79

For further details, see JOURNAL 3 (P.87).

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7.5.7.1. JOURNAL 3

Descriptions:

1. ENCODE

Compression Code: MH/MR

2. MSLT

MSLT means Minimum Scan Line Time. Used only at the factory.

3. RESOLUTION (RESOL)

Indicates the resolution of the communication. If multiple pages are transmitted or received, it indicates the last page´sresolution. If there is a communication error, “?” is displayed.

4. SPEED

Indicates the speed of communication. If multiple pages are transmitted or received, it indicates the last page´s communicationspeed. If there is a communication error, “?” is displayed.

5. RCV-TRIG. (CNT.)

Indicates the trigger that causes the unit to switch to the fax receive mode. The available options are listed in JOURNAL 3 in2.4.7.2. PRINTOUT EXAMPLE. The values in parentheses indicate how many times the trigger has been used. (For example,“0003” means three times.)

No. Display Function1 FAX MODE Means the unit received a fax message in the FAX mode.2 MAN RCV Means the unit received a fax message by manual operation.3 FRN RCV Means the unit received a fax message by friendly signal detection.4 RMT DTMF Means the unit detected DTMF (Remote Fax activation code) entered remotely.5 PAL DTMF Means the unit detected DTMF (Remote Fax activation code) entered by a parallel connected telephone.6 TURN-ON Means the unit started to receive after 15 rings. (Remote Turn On: Service Code #573)7 TIME OUT Means the unit started to receive after Ring Time Out in the EXT-TAM or TEL/FAX mode.8 IDENT Means the unit detected Ring Detection.9 TEL/FAX Means the unit detected the CNN while it was sending the Dummy Ring Back Tone in the TEL/FAX mode.

NO RESPONSE DISAPPEARED ON JOURNAL

The “NO RESPONSE DISAPPEARED ON JOURNAL” displays the information about the last 10 communications terminatedby “No Response”. (Some of the communications terminated by “No Response” were not displayed in the JOURNAL.)When afax transmission cannot be performed because the other party´s unit is set to the TEL mode, “No response” will be printed.

6. EQM

EQM means Eye Quality Monitor. Used only at the factory.

7. ERROR LINE(RX)

When an error occurs while receiving a fax, this shows the number of error lines.

8. MAKER CODE

This shows a 2 digit code of the other partyís fax machine brand.

0E: “KX” model00: Unknown79: “UF” model19: “Xerox” model

7.5.7.2. PRINTOUT EXAMPLE

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7.5.8. DIGITAL BOARD SECTION

One of most difficult problems to deal with is when the system will not boot up.

The symptom: No response when the power is turned on. (No LCD display, keys are not accepted.)

Note:

1. Electrical continuity may have existed at the factory check, but a faulty contact occurred as a result of vibration, etc.,during transport.

2. Solder waste remaining on the board may get caught under the IC during transport, causing a short circuit.

Before we begin mass production, several hundred trial units are produced at the plant, various tests are applied and anymalfunctions are analyzed. (In past experiences, digital IC (especially SRAM and ROM) malfunctions are extremely rare afterinstallation in the product.)This may be repaired by replacing the IC, (ASIC etc.). However, the real cause may not have been an IC malfunction but asoldering fault instead.Soldering faults which are difficult to detect with the naked eye are common, particularly for an ASIC and RA (Resistor Array).But if you have an oscilloscope, you can easily determine the problem site or IC malfunction by checking the main signal lines.Even if you don´t have such a measuring instrument, by checking each main signal line and resoldering it, in many cases theproblem will be resolved.An explanation of the main signals (for booting up the unit) is below.

What are the main signals for booting up the unit?

Please refer to the DIGITAL BLOCK DIAGRAM (P.89).The ASIC (including the CPU) (IC1) controls all the other digital ICs. When the power is turned on, the ASIC (CPU) retrievesthe operation code stored in the ROM (IC2), then follows the instructions for controlling each IC. All ICs have some innerregisters that are assigned to a certain address.It is the address bus by which the ASIC (CPU) designates the location inside each IC. And the data bus reads or writes the datain order to transmit the instructions from the ASIC (CPU) to the ICs.These signal lines are all controlled by voltages of 5V/3.3V (H) or 0V (L).

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The signal lines that must be normal for the system to boot upare listed here [List 1].

For signal lines other than these, even if they malfunction theydo not directly affect booting up the system.

7.5.8.1. DIGITAL BLOCK DIAGRAM

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Normal Wave Patterns

Remarks:

When you use an oscilloscope to judge whether a signal to be tested is normal or NG, perform the signal check in exactly thesame order as in [List 1]. (If the ASIC fails to access the ROM, the ASIC cannot access SRAM normally.)

The digital circuit actually operates according to the timing combinations of these signals. If the timing of these signals is evenslightly delayed, the circuit will not work. Nor will it if the IC is defective and the output voltage level is not normal although thetiming of these signals is accurate enough to meet the specifications. (Make sure that your oscilloscope is calibrated beforestarting a test.)

Therefore, it is imperative to confirm whether each IC outputs the signal at the correct level. (See the I/O Pin No. Diagram.)The signal level should be constantly output at between 3.3V (H) and 0V (L) as described earlier.

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Note:

Simply check the output level and make sure if the IC repeatedly outputs the signal at between 3.3V (H) and 0V (L).

I/O and Pin No. Diagram

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After the power is turned on, the ASIC (CPU) initializes and checks each IC.

The ROM, SRAM, and Modem are checked.

If initialization fails for the ICs, the system will not boot up.

CROSS REFERENCE:

NG EXAMPLE (P.96)

CHECK THE STATUS OF THE DIGITAL BOARD (P.97)

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7.5.8.2. FLASH MEMORY (IC6)

If the unit is working correctly but the TAM fanction can not work, you should check the Flash Memory.

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7.5.8.3. NG EXAMPLE

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7.5.8.4. CHECK THE STATUS OF THE DIGITAL BOARD

First, please check voltages and oscillation whether they are correct as follows.

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7.5.9. ANALOG BOARD SECTION

The analog parts check is actually different from the digital parts check. The signal route is determined by the purpose of thecheck. For example, the handset TX route begins from the handset microphone and is output in the telephone line. In this route,it is mainly an analog signal. Tracing the signal can be done easily using an oscilloscope. Each route is shown on the CHECKSHEET (P.99) here. If there is a problem with the unit (for example, you cannot communicate with the H/S, etc.), trace the signalin the area and determine the cause.

7.5.9.1. CHECK SHEET

Note:

: Inside the digital board[ ]: Inside the operation board

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Note:

: Inside the digital board[ ]: Inside the operation board

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7.5.9.2. DEFECTIVE ITS (INTEGRATED TELEPHONE SYSTEM) SECTION

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7.5.10. POWER SUPPLY BOARD SECTION

1. Key components for troubleshooting

Check the following parts first: F101, D101-D104, C106, Q101, PC101 and IC101.

This comes from our experience with experimental tests. For example: power supply and lightning surge voltage test,withstanding voltage test, intentional short circuit test, etc.

Caution:

If you find a melted fuse in the unit, do not turn on the power until you locate and repair the faulty parts (except for the fuse);

otherwise the fuse will melt again and you cannot pinpoint the faulty point.

In most cases, the symptom is that nothing is output. It is more likely that the fault is in the primary side rather than thesecondary side. Check the primary side first.

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2. Troubleshooting Flow Chart

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3. Broken parts repair details

(D101, D102, D103, D104)

Check for a short-circuit in terminal 4. If D101, D102, D103 and D104 are short-circuits, F101 will melt (open).

In this case, replace all of the parts (D101, D102, D103, D104, F101).

(Q101)

The worst case of Q101 is a short-circuit between the Drain and Gate because damage expands to the peripheral circuit ofQ101.

This is due to a very high voltage through the Gate circuit which is composed of R128, R109, D106 and IC101.

You should change all of the parts listed as follows.

F101, Q101, R128, R109, D106, IC101

(D201)

If D201 is broken, the oscillation circuit in the power supply cannot operate. Check it with an electric tester.

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7.5.11. OPERATION BOARD SECTION

7.5.11.1. NO KEY OPERATION

CROSS REFERENCE:

TEST FUNCTIONS (P.48)

7.5.11.2. NO LCD INDICATION

CROSS REFERENCE:

TEST FUNCTIONS (P.48)

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Refer to TRANSLATION LISTS (P.3)

Refer to TRANSLATION LISTS (P.3)

7.5.12. SENSOR SECTION

Refer to 6.5. SENSORS AND SWITCHES for the circuit descriptions.

7.5.12.1. CHECK THE DOCUMENT SENSOR (PS1)................."CHECK DOCUMENT"

7.5.12.2. CHECK THE READ POSITION (SW44)................."REMOVE DOCUMENT"

7.5.13. READ SECTION

Refer to SCANNING BLOCK (P.123).

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CROSS REFERENCE:

TEST FUNCTIONS (P.48)

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7.5.14. THERMAL HEAD SECTION

Refer to THERMAL HEAD (P.121).

CROSS REFERENCE:

SUPERVISION CIRCUIT FOR THE THERMAL HEAD TEMPERATURE (P.118)

THERMAL HEAD (P.121)

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8 CIRCUIT OPERATIONS

8.1. CONNECTION DIAGRAM

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8.2. GENERAL BLOCK DIAGRAMThe control section will be explained as shown in the block diagram.

1. ASIC (IC1)

Composed mainly of an address decoder, modem control section, CPU and RTC.

Controls the general FAX operations.

Controls the operation panel I/F.

Controls the thermal head I/F and CIS I/F.

Executes image processing.

TAM monitor and the H/S volume.

I/O ports

2. ROM (IC2)

Contains all of the program instructions for unit operations.

3. Static RAM (IC4)

This memory is used mainly for the parameter working storage area.

4. MODEM (IC5)

Modem for the FAX.

5. Read Section

Contact Image Sensor (CIS) to read transmitting documents.

6. Thermal Head

Contains heating elements for dot matrix image printing.

7. Motor driver (IC7)

Drives the motor.

8. Analog board

Composed of an ITS circuit and NCU circuit.

9. Sensor Section

Composed of a document sensor, recording paper sensor, motor position sensors, read position sensor.

10. Power supply switching board section

Supplies +5V and +24V to the unit.

11. FLASH MEMORY (IC6)

Saves TAM voice data.

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8.2.1. GENERAL BLOCK DIAGRAM

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8.3. CONTROL SECTION

8.3.1. BLOCK DIAGRAMA

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8.3.2. ASIC (IC1)

This custom IC is used for general FAX operations.

1. CPU

This model uses a Z80 equivalent CPU operating at 8MHz.Many of the peripheral functions are handled by custom designed LSIs. As a result, the CPU only needs to process the result.

2. RTC

Real time clock.

3. DECODER

Decodes the address.

4. ROM/RAM I/F

Controls the SELECT signal of ROM or RAM and bank switching.

5. CIS I/F

Controls document reading.

6. IMAGE DATA RAM

This is inside the ASIC and has 8KB which is used for image processing.

7. THERMAL HEAD I/F

Transmits the recorded data to the thermal head.

8. MOTOR I/F

Controls the motor which feeds the document and feeds the reading document.

9. OPERATION PANEL I/F

Control port for Operation Panel.

10. I/O PORT

I/O Port Interface (for analog board port control).

11. ANALOG BLOCK

Electronic volume for the handset and TAM monitor.Sends beep tones, etc.

Descriptions of Pin Distribution (IC1)

NO. SIGNAL I/O POWER SUPPLIEDVOLTAGE

DESCRIPTION

1 VSSA GND POWER SOURCE (ANALOG GND)2 VDDA 3.3 3.3V POWER SOURCE (ANALOG +3.3V)3 AIN1 A 3.3V CIS IMAGE SIGNAL INPUT (SIG)4 AIN2 A 3.3V THERMISTOR TEMPERATURE WATCH INPUT5 AIN3 A 3.3V LINE VOLTAGE DETECTION SIGNAL INPUT (DCIN)6 AMON A 3.3V ANALOG SIGNAL MONITOR TERMINAL7 VSS GND POWER SOURCE (GND)8 X32OUT O 3.3V/BATT RTC (32.768KHz) CONNECTION9 X32IN I 3.3V/BATT RTC (32.768KHz) CONNECTION

10 VDD (3.3V / B) ----- POWER SOURCE (+3.3V/LITHIUM BATTERY)11 XBACEN I 3.3V/BATT BACKUP ENABLE12 XRAMCS O 3.3V/BATT XRAMCS13 VDD (3.3V / B) ----- POWER SOURCE(+3.3V / LITHIUM BATTERY)14 VDD (2.5V/B) ----- POWER SOURCE (+2.5V / LITHIUM BATTERY)15 FTG O 3.3V SH SIGNAL OUTPUT FOR CIS (SI)16 F1 O 3.3V 01 SIGNAL OUTPUT FOR CIS (CLK)17 F2/OP O 3.3V OUTPUT PORT (CISON)18 FR/OP O 3.3V OUTPUT PORT (MDMRST)19 CPC I 3.3V INPUT PORT (CPC)20 RVN I 3.3V INPUT PORT (CISSEL)21 IRDATXD/IOP I 3.3V INPUT PORT (JAM)22 IRDARXD/IOP80 O 3.3V OUTPUT PORT (HSTX MUTE)23 TXD/IOP I 3.3V INPUT PORT (BELL)24 RXD/IOP I/O 3.3V PORT (TELRXEN)25 XRTS/IOP I 3.3V INPUT PORT (PSHORT)26 XCTS/IOP I/O 3.3V PORT (MDMTXEN)27 VDD (2.5V) ----- POWER SOURCE (+2.5V)28 TONE1 A 3.3V TONE OUTPUT

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NO. SIGNAL I/O POWER SUPPLIEDVOLTAGE

DESCRIPTION

29 TONE2 A 3.3V TONE OUTPUT30 VOLUREF A 3.3V ANALOG REF VOLTAGE31 VOLUOUT A 3.3V VOLUME OUTPUT32 VOLUIN A 3.3V VOLUME INPUT33 XNMI I 3.3V HIGH FIXED34 FMEMDO/IOP O 3.3V OUTPUT PORT (CIS ON)35 VDD (3.3V) ----- POWER SOURCE (+3.3V)36 VSS GND POWER SOURCE (GND)37 VSS GND POWER SOURCE (GND)38 VDD (3.3V) ----- POWER SOURCE (+3.3V)39 MIDAT/IOP I/O 3.3V PORT (TONE1EN)40 MICLK/IOP O 3.3V OUTPUT PORT (TONE2EN)41 MILAT/IOP I/O 3.3V PORT (HSRXEN)42 20KOSC/IOP O 3.3V OUTPUT PORT (DATA)43 XWAIT I 3.3V INPUT PORT (HOOK)44 HSTRD/IOP I 3.3V INPUT PORT (TEST)45 HSTWR/IOP I/O 3.3V PORT (CD)46 XOPRBE O 3.3V OPEN47 ADR15 O 3.3V CPU ADDRESS BUS 15 (NOT USED)48 ADR14 O 3.3V CPU ADDRESS BUS 14 (NOT USED)49 ADR13 O 3.3V CPU ADDRESS BUS 13 (NOT USED)50 VDD (2.5V) ----- POWER SOURCE (+2.5V)51 XOUT O 3.3V SYSTEM CLOCK (24MHz)52 XIN I 3.3V SYSTEM CLOCK (24MHz)53 VSS GND POWER SOURCE (GND)54 VDD (3.3V) ----- POWER SOURCE (+3.3V)55 XTEST O 3.3V 24MHz CLOCK56 TEST1 I 3.3V HIGH FIXED57 TEST2 I 3.3V HIGH FIXED58 TEST3 I 3.3V HIGH FIXED59 TEST4 I 3.3V HIGH FIXED60 XMDMINT I 3.3V MODEM INTERRUPT61 XMDMCS O 3.3V MODEM CHIP SELECT62 XRAS/IOP I/O 3.3V PORT (SPMUTE)63 XCAS1/IOP I 3.3V INPUT PORT (PAPER)64 XCAS2/IOP I 3.3V INPUT PORT (PDWN)65 XRESCS2 O 3.3V FLASH CHIP SELECT (XRESCS2)66 DB3 I/O 3.3V CPU DATA BUS 367 DB2 I/O 3.3V CPU DATA BUS 268 DB4 I/O 3.3V CPU DATA BUS 469 DB1 I/O 3.3V CPU DATA BUS 170 DB5 I/O 3.3V CPU DATA BUS 571 VDD (3.3V) ----- POWER SOURCE (+3.3V)72 VSS GND POWER SOURCE (GND)73 VSS GND POWER SOURCE (GND)74 VDD (3.3V) ----- POWER SOURCE (+3.3V)75 DB0 I/O 3.3V CPU DATA BUS 076 DB6 I/O 3.3V CPU DATA BUS 677 DB7 I/O 3.3V CPU DATA BUS 778 XROMCS O 3.3V ROM (IC502) CHIP SELECT79 RD O 3.3V CPU RD80 WR O 3.3V CPU WR81 ADR0 O 3.3V CPU ADDRESS BUS 082 ADR1 O 3.3V CPU ADDRESS BUS 183 ADR2 O 3.3V CPU ADDRESS BUS 284 ADR3 O 3.3V CPU ADDRESS BUS 385 ADR4 O 3.3V CPU ADDRESS BUS 486 ADR5 O 3.3V CPU ADDRESS BUS 587 VSS GND POWER SOURCE (GND)88 VDD (2.5V) ----- POWER SOURCE (+2.5V)89 ADR6 O 3.3V CPU ADDRESS BUS 690 ADR7 O 3.3V CPU ADDRESS BUS 791 ADR8 O 3.3V CPU ADDRESS BUS 892 ADR9 O 3.3V CPU ADDRESS 993 ADR10 O 3.3V CPU ADDRESS 1094 ADR11 O 3.3V CPU ADDRESS 11

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NO. SIGNAL I/O POWER SUPPLIEDVOLTAGE

DESCRIPTION

95 ADR12 O 3.3V CPU ADDRESS 1296 RBA0 O 3.3V ROM/RAM BANK ADDRESS 097 RBA1 O 3.3V ROM/RAM BANK ADDRESS 198 RBA2 O 3.3V ROM/RAM BANK ADDRESS 299 RBA3 O 3.3V ROM/RAM BANK ADDRESS 3100 RBA4 O 3.3V ROM/RAM BANK ADDRESS 4101 RBA5 O 3.3V ROM/RAM BANK ADDRESS 5102 RBA6/IOP96 O 3.3V OUTPUT PORT (NC)103 STB1 O 3.3V STROBE SIGNAL OUTPUT TO THERMAL HEAD104 STB2 O 3.3V STROBE SIGNAL OUTPUT TO THERMAL HEAD105 STB3 O 3.3V STROBE SIGNAL OUTPUT TO THERMAL HEAD106 XRESET I 3.3V RESET INPUT107 VDD (3.3V) ----- POWER SOURCE (+3.3V)108 VSS GND POWER SOURCE (GND)109 VSS GND POWER SOURCE (GND)110 VDD (3.3V) ----- POWER SOURCE (+3.3V)111 XORESET O 3.3V NOT USED112 VDD(5V) ----- POWER SOURCE (+5V)113 VSS GND POWER SOURCE (GND)114 XRESETI I 3.3V RESET INPUT115 WDERR O 3.3V WATCHED ERROR OUTPUT SIGNAL116 THDAT O 3.3V RECORDED IMAGE OUTPUT (XTHDAT)117 THCLK O 3.3V CLOCK OUTPUT FOR DATA TRANSFER (XTHCLK)118 THLAT O 3.3V PULSE OUTPUT FOR DATA LATCH (XTHLAT)119 STBNP I 3.3V INPUT PORT (MOT-POS)120 RM0/IOP O 3.3V MOTOR A PHASE121 RM1/IOP O 3.3V MOTOR B PHASE122 RM2/IOP O 3.3V MOTOR /A PHASE123 RM3/IOP O 3.3V MOTOR /B PHASE124 RXE/IOP O 3.3V MOTOR ENABLE125 TMO O 3.3V OUTPUT PORT (THON)126 VDD (2.5V) ----- POWER SOURCE (+2.5V)127 VSS GND POWER SOURCE (GND)128 TM1/IOP O 3.3V OUTPUT PORT (NC)129 TM2/IOP O 3.3V OUTPUT PORT (CISON)130 TM3/IOP O 3.3V OUTPUT PORT (RLY)131 TXE/IOP I 3.3V INPUT PORT (CUT_POS)132 KSTART O 3.3V OPERATION PANEL CONTROL133 KLATCH O 3.3V OPERATION PANEL CONTROL134 KSCLK O 3.3V OPERATION PANEL CONTROL135 KTXD O 3.3V OPERATION PANEL CONTROL136 KRXD I 3.3V OPERATION PANEL CONTROL137 FMEMCLK/IOP O 3.3V OUTPUT PORT (OPRESET)138 FMEMDI/IOP O 3.3V OUTPUT PORT (DR)139 ADSEL1 O 3.3V CHANNEL SELECT SIGNAL FOR AIN2140 VDDA (2.5V) 2.5V POWER SOURCE (ANALOG +2.5V)141 VREFB A 3.3V A/D CONVERTER´S ZERO STANDARD VOLTAGE

OUTPUT142 VCL A 3.3V ANALOG PART STANDARD VOLTAGE SIGNAL143 VREFT A 3.3V A/D CONVERTER´S FULL SCALE VOLTAGE

OUTPUT144 VSSA GND POWER SOURCE (ANALOG GND)

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8.3.3. ROM (IC2)

This 512 KB ROM (OTPROM or MASKROM) has 32 KB of common area and bank area (BK4~BK 63).The capacity of each bank is 8 KB.

The addresses of the common area are from 0000H to 7FFFH, and addresses 8000H to 9FFFH are for the bank area.

8.3.4. RAM (IC4)

This 128 KB RAM has 8 KB of common area and bank area (BK0, BK1).The capacity of each bank is 12 KB.The addresses of the common area are from D000H to EFFFH, and addresses A000H to CFFFH are for the bank area.

8.3.5. RESET CIRCUIT (WATCH DOG TIMER)

The output signal (reset) from pin 4 of the voltage detect IC (IC3) is input to the ASIC (IC1) 114 pin.

1. During a momentary power interruption, a negative reset pulse of 50~70 msec is generated and the system is reset completely.

2. The watch dog timer, built-in the ASIC (IC1), is initialized by the CPU about every 1.5 ms.

When a watch dog error occurs, pin 115 of the ASIC (IC1) becomes low level.

The terminal of the ´WDERR´ signal is connected to the reset line, so the ´WDERR´ signal works as the reset signal.

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8.3.6. SRAM and RTC BACK UP CIRCUIT

1. Function

This unit has a lithium battery (BAT1) which works for the RAM (IC4) and Real Time Clock (RTC, Integrated into ASIC:IC1).The user parameter for auto dial numbers, the transmission ID, the system setup date and so on are stored in the RAM (IC4).The RTC continues functioning, even when the power switch is OFF, backed up by a lithium battery.

2. Circuit Operation

When the power is turned ON, power is supplied to RAM (IC4) and RTC (IC1).At this time, the voltage at pin 32 of RAM and pin 14 of RTC (IC1) is +3.3V. When the power is turned OFF, the battery suppliesthe power to RAM and RTC through J1, R48, D3. At that time, the voltage at pin 32 of RAM and pin 14 of IC1 are about +2.5V.When the power is OFF and the +5V and +3.3V voltages decrease, IC3 detects them and LOW is input to pin 114 of IC1. Pin111 of IC1 outputs the reset signals. Pin 32 of RAM (IC4) and pin 11 of IC1 become low, then RAM and RTC (IC1) go into theback up mode, when the power consumption is lower.

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8.3.7. SUPERVISION CIRCUIT FOR THE THERMAL HEAD TEMPERATURE

1. Function

The thermistor changes the resistor according to the temperature and uses the thermistor´s characteristics.The output of pin 139 of IC1 becomes a low level.Then when it becomes a high level, it triggers point (A).In point (C), according to the voltage output time, the thermal head´s temperature is detected.

After the thermal head temperature is converted to voltage in (B), it is then changed to digital data in the A/D converter insideIC1. The CPU decides the strobe width of the thermal head according to this value. Therefore, this circuit can keep the thermalhead at an even temperature in order to stabilize the printing density and prevent the head from being overheated.

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8.4. FACSIMILE SECTION

8.4.1. IMAGE DATA FLOW DURING FACSIMILE OPERATION

COPY (Fine, Super-Fine, Photo)

1. Line information is read by CIS, via route (1), and is input to IC1.

2. In IC1, the data is adjusted to a suitable level for A/D conversion in the Analog Signal Processing Section, and via route (2)it is input to A/D conversion (8 bit). After finishing A/D conversion, the data is input to the Image Processing Section via route(3). Then via routes (4) and (5), it is stored in RAM as shading data.

3. The draft´s information that is read by CIS is input to IC1 via route (1). After it is adjusted to a suitable level for A/Dconversion via route (2), the draft´s information is converted to A/D (8 bit), and it is input to the Image Processing Section.The other side, the shading data which flows from RAM via routes (6) and (7), is input to the Image Processing Section.After finishing the draft´s information image processing, white is regarded as "0" and black is regarded as "1".Then via routes (4) and (5), they are stored in RAM.

4. The white/black data stored as above is input to the P/S converter via routes (6) and (8).The white/black data converted to serial data in the P/S converter is input to the Thermal Head via route (9) and is printedout on recording paper.

Note:

Standard: Reads 3.85 times/mm

Fine: Reads 7.7 times/mm

Super-Fine: Reads 15.4 times/mm

Transmission

1. Same processing as COPY items 1) - 3).

2. The data stored in RAM of IC1 is output from IC1 via routes (6) and (10), and is stored in the system bus.Via route (11), it is stored in the communication buffer inside RAM (IC4).

3. While fetching data stored in the communication buffer synchronous with the modem, the CPU inputs data to the modemalong route (12).It is converted to serial analog data and forwarded over telephone lines via the NCU Section.

Reception

1. The serial analog image data is received over telephone lines and input to the modem IC (IC5) via the NCU section, whereit is demodulated to parallel digital data. The balance data is sent to the modem. Then the CPU stores the data in thecommunication buffer of RAM (IC4) along route (11).

2. The data stored in RAM (IC4) is decoded by the CPU via route (12), and is stored in RAM by routes (13) and (5).

3. Same processing as COPY item 4).

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8.4.2. BLOCK DIAGRAM

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8.4.3. THERMAL HEAD

1. Function

This unit utilizes state of the art thermal printer technology.The recording paper (roll paper) is chemically processed. When the thermal head contacts this paper it emits heat momentarily,and black dots (appearing like points) are printed on the paper. If this continues, letters and/or diagrams appear, and the originaldocument is reproduced.

2. Circuit Operation

There are 27 driver ICs aligned horizontally on the thermal head and each one of these ICs can drive 64 heat emitting registers.This means that one line is at a density of 64×27=1728 dots=(8 dots/mm).White/Black (white=0, black=1) data in one line increments is synchronized at IC1 pin 117 (THCLK), and sent from IC1 pin 116(THDAT) to the shift register of the ICs. The shift registers of the 27 ICs are connected in series, and upon the shift of dotincrement 1728, all the shift registers become filled with data, and a latch pulse is emitted to each IC from IC1 pin 118(THLAT).With this latch pulse, all the contents of the shift registers are latched to the latch registers. Thereafter, through theaddition of strobes from the IC1 pins (103 - 105) only black dot locations (=1) among latched data activates the driver, and thecurrent passes to heat the emitting body causing heat emission.Here, the three line strobes, STB1 to STB3, impress at intervals of 9.216 msec, as required for one-line printout.The sequence is shown on the next page. [Moreover, for the strobe width, the thermistor value inside the thermal head is

detected according to IC1 pin 4. (See BLOCK DIAGRAM (P.120).) Depending on that value, the strobe width is recorded inROM (IC2).Accordingly, the strobe width is determined.When the thermal head is not used, the IC1 (125, THON) becomes low, Q3 turns OFF, Q2 turns OFF, and the +24 V powersupply for the thermal head driver is not impressed to protect the IC.

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8.4.4. SCANNING BLOCK

The scanning block of this device consists of a control circuit and a contact image sensor made up of a celfoc lens array, an LEDarray, and photoelectric conversion elements.

When an original is inserted and the start button pressed, pin 17 of IC1 goes to a high level and the transistor Q11 turns on andpin 129 of IC1 goes to a low level and the transistor Q7 turns on. This applies voltage to the LED array to light it and the voltage(+3.3V) of CIS turns on. The contact image sensor is driven by each of the FTG-F1 signals output from IC1, and the original imageilluminated by the LED array undergoes photoelectric conversion to output an analog image signal. The analog image signal isinput to the system LSI (IC1) on AIN1 (pin 3 of IC1) and converted into 8-bit data by the A/D converter inside IC1. Then this signalundergoes digital processing in order to obtain a high-quality image.

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8.4.5. STEPPING MOTOR DRIVE CIRCUIT

1. Function

One individual stepping motor is used for transmission and reception. It feeds the document or recording paper synchronizedfor reading or printing.

2. Circuit Operation

During motor drive, gate array IC1 pin 124 becomes a high level, and Q4 and Q1 go ON as a result. +24 V is supplied to themotor coil.Stepping pulses are output from gate array IC1, causing driver IC7 to go ON. The motor coil is energized sequentially in 2 phaseincrements or 1-2 phase increments, which causes a 1-step rotation. A 1-step rotation is 0.13mm of recording paper ordocument paper. The timing chart is below.

Stepping Motor Phase PatternFunction Mode Phase Pattern Speed

Copy Fine/Photo 1-2 432 ppsSuper Fine 1-2 216 pps

FAX STD 2 432 ppsFine/Photo 1-2 432 ppsSuper Fine 1-2 216 pps

——— Paper Feed 2 432 pps

When the motor is OFF, gate array IC1 pin 124 becomes a low level and Q4 and Q1 also turns OFF. Instead of +24V, +5V issupplied through D1 so that the motor is held in place.

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8.4.6. GEAR SECTION

This section shows how the motor-driven gear mechanism works in the main operations: FAX transmission, FAX reception themotor and copying.

8.4.6.1. MODE SELECTION

When the motor attached to the Drive Motor Gear rotates counterclockwise (CCW), Swing Gear A engages the CAM and the CAMturns counterclockwise to select a mode. (See Fig. A.) There are three mode options controlled by the Switch: A: Transmit mode,B: Receive mode and C: Copy mode. In Fig. B, you can see which mode is selected by the position of the rib in the CAM.

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8.4.6.2. MODE OPERATION

Once a mode is selected, the Drive Motor Gear rotates clockwise (CW) and then the Swing Gear A-1 controls the mode operation.

A: Transmit mode

Swing Gear A-1 engages G6 and conveys its drive power to the Separation Roller Gear for pre-feeding documents.

B: Receive mode

Swing Gear B engages G8 and conveys its drive power to the Platen Roller Gear for printing the received data.

C: Copy mode

Swing Gear A-1 and B engage Gears 6 and 8 respectively and drive both the Separation Roller Gear and the Platen Roller Gearfor feeding documents and recording paper in the copying operation.

8.4.6.3. MECHANICAL MOVEMENTS IN THE MAIN OPERATIONS

8.4.6.3.1. IDLE STATUS

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8.4.6.3.2. SCANNING

CROSS REFERENCE:

SENSOR SECTION (P.106)

8.4.6.3.3. PRINTING

Note:

See SENSORS AND SWITCHES (P.129)

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8.4.6.3.4. COPYING

CROSS REFERENCE:

SENSOR SECTION (P.106)

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All of the sensors and switches are shown below.

8.5. SENSORS AND SWITCHES

Sensor CircuitLocation

Sensor Sensor or Switch Name Message Error

DIGITAL CN5 Motor Position [CALL SERVICE 2]CN6 Cutter Position [PAPER JAMED]

ANALOG SW1 Cover Open and Paper set [CHECK COVER] and [OUT OF PAPER]SW2 Hook SW ————SW3 JAM set [PAPER JAMED]

Operation Panel SW44 Document Read Position [REMOVE DOCUMENT]PS1 Document set [CHECK DOCUMENT]

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8.5.1. MOTOR POSITION SENSOR

This sensor is a detection switch for recording the position of the CAM.

Digital BoardSignal (IC1-119 Pin)

Home position Low levelOther High level

8.5.2. CUTTER POSITION SENSOR

Digital BoardSignal (IC1-131 Pin)

Home position Low levelOther High level

8.5.3. RECORDING PAPER SENSOR (SW1)

When there is no recording paper, the plate is separated from the switch lever and the switch turns off. Pin 63 of IC1 becomes ahigh level. When there is recording paper, the plate pushes the switch lever and the switch turns ON. Pin 63 of IC1 becomes a lowlevel.

Analog BoardSignal (IC1-63 Pin)

Paper Low levelNo paper High level

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8.5.4. HOOK SWITCH (SW2)

When the handset is lifted, the switch turns ON, and the signal at pin 43 of IC1 becomes low.

When the handset is returned, the switch turns OFF, and the signal at pin 43 of IC1 becomes high.

Digital BoardSW Signal

ON-Hook OFF High level (IC1-43 pin)OFF-Hook ON Low level

8.5.5. JAM SENSOR (SW3)

The JAM sensor is a detection switch for determining whether the recording paper edge is in the correct position or not. If therecording paper cannot be detected correctly at the JAM sensor position even when recording paper is present, then JAM isdisplayed. If the recording paper is at the sensor position, then the switch turns on the IC1-21pin switches to a high level.

Analog BoardSignal (IC1-21 Pin)

Paper Low levelNo paper High level

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8.5.6. DOCUMENT TOP SW (SW44)

When a document is brought to the read position, the SW becomes ON, and the input signal of IC1-16 pin (Operation) becomesa low level. When there is no document at the read position, the SW becomes OFF, and the input signal of IC1-16 pin (Operation)becomes a high level.

Operation BoardSignal (IC1-16 pin)

Out of the Read Position High levelAt the Read Position Low level

8.5.7. DOCUMENT SET SENSOR (PS1)

When a document is set, the shelter plate closes the sensor light, the photo transistor becomes OFF, and the input signal of theIC1-15 pin (Operation) becomes a high level. When there is no document, the shelter plate passes the sensor light, the phototransistor becomes ON, and the input signal of the IC1-15 pin (Operation) becomes a low level. (When checking this sensor, theIC1-41 pin becomes a low level.)

Operation BoardPhoto transistor Signal (IC1-15 Pin)

No document ON Low levelSet document OFF High level

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8.6. MODEM SECTION

8.6.1. FUNCTION

The unit uses a 1 chip modem (IC5), enabling it to act as an interface between the control section for FAX sending andreceiving, and the telephone line. During a sending operation, the digital image signals are modulated and sent to the telephoneline. During a receiving operation, the analog image signals which are received via the telephone line are demodulated andconverted into digital image signals. The communication format and procedures for FAX communication are standardized byITU-T. This 1 chip modem (IC5) has hardware which sends and detects all of the necessary signals for FAX communication andDTMF.It can be controlled by writing commands from the ASIC (IC1) to the register in the modem (IC5).

This modem (IC5) also sends DTMF signals, and detects busy tones, dial tones and DTMF.

Overview of Facsimile Communication Procedures (ITU-T Recommendation):

1. ON ITU-T (International Telecommunications´ Union.)

The No. XIV Group of ITU-T, one of the four permanent organizations of the International Telecommunications Uniib (ITU),investigates and make recommendations on international standards for facsimiles.

2. Definition of Each Group

• • • • Group I (G1)

A-4 size documents without using formats which reduce the band width of a signal sent over telephone lines.Determined in 1968.Transmission for about 6 minutes at scanning line density of 3.85 lines/mm.

• • • • Group II (G2)

Using reduction technology in the modulation/demodulation format, an A-4 size document is sent at an official scanning linedensity of 3.85 lines/mm for about 3 minutes.Methods to suppress redundancy are not used.Determined in 1976.

• • • • Group III (G3)

A method of suppressing redundancy in the image signal prior to modulation is used. An A-4 size document is sent withabout one minute.Determined in 1980.

• • • • Group IV (G4)

Transmission is via the data network. A method is provided for suppressing redundancy in signals prior to transmission, anderror-free reception of transmission is possible.The scope of these facsimile applications is not limited simply to transmission of written statements. Through symbioticlinkages with other communication methods, it can be expected to expand to include integrated services.

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3. Facsimile Call Time Series

As shown in the following diagram, the facsimile call time series is divided into five phases.

Phase A : Call setting

Call setting can be manual/automatic.

Phase B : Pre-message procedure

Phase B is a pre-processing procedure and sequence for confirming the status of the terminal, transmission route, etc. and forterminal control. It implements the terminal preparation status, determines and displays terminal constants, confirmssynchronization status, etc. and prepares for transmission of facsimile messages.

Phase C : Message transmission

Phase C is the procedure for transmitting facsimile messages.

Phase D : Post message procedure

Phase D is the procedure for confirming that the message is completed and received. For continuous transmission, phase Bor phase C are repeated for transmission.

Phase E : Call retrieval

Phase E is the procedure for call retrieval, that is for circuit disconnection.

4. Concerning Transmission Time

Transmission Time = Control Time + Image Transmission Time + Hold Time

Transmission time consists of the following.

Control time:

This is time at the start of transmission when the functions at the sending and receiving sides are confirmed, thetransmission mode is established, and transmission and reception are synchronized.

Image transmission time:

This is the time required for the transmission of document contents (image data). In general, this time is recorded in thecatalog, etc.

Hold time:

This is the time required after the document contents have been sent to confirm that the document was in fact sent, and tocheck for telephone reservations and/or the existence of continuous transmission.

5. Facsimile Standards

ItemTelephone Network Facsimile

G3 MachineConnection Control Mode Telephone Network Signal ModeTerminal Control Mode T. 30 BinaryFacsimile Signal Format DigitalModulation Mode PSK (V. 27 ter) or QAM (V. 29)Transmission Speed 300 bps (Control Signal)

2400, 4800, 7200, 9600 bps (FAX Signal)Redundancy CompressionProcess(Coding Mode)

1 dimension: MH Mode2 dimension: MR Mode (K=2.4)

Resolution Main Scan: 8 pel/mmSub Scan: 3.85, 7.7l/mm

Line Synchronization Signal EOL Signal1 Line Transmission Time[ms/line]

Depends on the degree of data reduction.Minimum Value: 10, 20Can be recognized in 40ms.

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6. Explanation of Technology

a. G3 Communication Signals (T. 30 Binary Process)

For G3 facsimile communication, this is the procedure for exchanging control signals between the sending and receivingmachines both before and after transmission of image signals.Control signals at 300 bps FSK are: 1850 Hz...0, 1650Hz...1.An example of the binary process in G3 communication is shown below.

Explanation of Signals

Control signals are comprised mainly of 8-bit identification signals and of the data signals added to them. Data signals areadded to DIS and DCS signals.

Signal.....DIS (Digital Identification Signal)Identification Signal Format.....00000001

Function:Notifies the capacity of the receiving unit. The added data signals are as follows.

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(Example)

Bit No. DIS/DTC DCS1 Transmitter - T.2 operation2 Receiver - T.2 operation Receiver - T.2 operation3 T.2 IOC = 176 T.2 IOC = 1764 Transmitter - T.3 operation5 Receiver - T.3 operation Receiver - T.3 operation6 Reserved for future T.3 operation features.7 Reserved for future T.3 operation features.8 Reserved for future T.3 operation features.9 Transmitter - T.4 operation

10 Receiver - T.4 operation Receiver - T.4 operation11, 12(0, 0)(0, 1)(1, 0)(1, 1)

Data signaling rateV.27 ter fall back modeV.27 terV.29V.27 ter and V.29

Data signaling rate2400 bit/s, V.27 ter4800 bit/s, V.27 ter9600 bit/s, V.297200 bit/s, V.29

13 Reserved for the new modulation system.14 Reserved for the new modulation system.15 Vertical resolution = 7.7 line/mm Vertical resolution = 7.7 line/mm16 Two-dimensional coding capability Two-dimensional coding

17, 18(0, 0)

(0, 1)

(1, 0)

(1, 1)

Recording width capabilities1728 picture elements along scan line length of215 mm ± 1%1728 picture elements along scan line length of215 mm ± 1% and2048 picture elements along scan line length of255 mm ± 1% and2432 picture elements along scan line length of303 mm ± 1%1728 picture elements along scan line length of215 mm ± 1% and2048 picture elements along scan line length of255 mm ± 1%Invalid

Recording width1728 picture elements along scan line length of215 mm ± 1%2432 picture elements along scan line length of303 mm ± 1%

2048 picture elements along scan line length of255 mm ± 1%

Invalid19, 20(0, 0)(0, 1)(1, 0)(1, 1)

Maximum recording length capabilityA4 (297 mm)UnlimitedA4 (297 mm) and B4 (364 mm)Invalid

Maximum recording lengthA4 (297 mm)UnlimitedB4 (364 mm)Invalid

Signal.....DCS (Digital Command Signal)Identification Signal Format.....X1000001

Function:Notifies the capacity of the receiving machine obtained at DIS and announces the transmission mode of the sender. The addeddata signals are as follows.

(Example)

Bit No. DIS/DTC Standard setting DCS21, 22, 23(0, 0, 0)(0, 0, 1)(0, 1, 0)(1, 0, 0)(0, 1, 1)(1, 1, 0)(1, 0, 1)(1, 1, 1)

Minimum scan line time capability of the receiver20 ms at 3.85 l/mm: T7.7 = T3.8540 ms at 3.85 l/mm: T7.7 = T3.8510 ms at 3.85 l/mm: T7.7 = T3.855 ms at 3.85 l/mm: T7.7 = T3.8510 ms at 3.85 l/mm: T7.7 = 1/2 T3.8520 ms at 3.85 l/mm: T7.7 = 1/2 T3.8540 ms at 3.85 l/mm: T7.7 = 1/2 T3.850 ms at 3.85 l/mm: T7.7 = T3.85

Minimum scan line time20 ms40 ms10 ms5 ms

0 ms24 Extend field 1 Extend field25 2400 bit/s handshaking 0 2400 bit/s handshaking26 Uncompressed mode 0 Uncompressed mode27 Error correction mode 0 Error correction mode28 Set to "0". 0 Frame size 0 = 256 octets 1 = 64 octets29 Error limiting mode 0 Error limiting mode30 Reserved for G4 capability on PSTN 0 Reserved for G4 capability on PSTN31 Unassigned 032 Extend field 1 Extend field33(0)(1)

Validity of bits 17, 18Bits 17, 18 are validBits 17, 18 are invalid

0 Recording widthRecording width indicated by bits 17, 18Recording width indicated by this field bitinformation

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Bit No. DIS/DTC Standard setting DCS34 Recording width capability 1216 picture elements along

scan line length of 151 ± mm 1%0 Middle 1216 elements of 1728 picture elements

35 Recording width capability 864 picture elements alongscan line length of 107 ± mm 1%

0 Middle 864 elements of 1728 picture elements

36 Recording width capability 1728 picture elements alongscan line length of 151 ± mm 1%

0 Invalid

37 Recording width capability 1728 picture elements alongscan line length of 107 ± mm 1%

0 Invalid

38 Reserved for future recording width capabilities. 039 Reserved for future recording width capabilities. 040 Extend field 1 Extend field41 Semi super time / mm 142 Semi super time / mm 043 Super time 044 Inch 045 mm 146 MSC/SF 047 Select Polling 048 EXT 0

Note 1 - Standard facsimile units conforming to T.2 must have the following capability: Index of cooperation (IOC)=264.

Note 2 - Standard facsimile units conforming to T.3 must have the following capability: Index of cooperation (IOC)=264.

Note 3 - Standard facsimile units conforming to T.4 must have the following capability: Paper length=297 mm.

Signal Identification Signal Format FunctionTraining 1 ——————— A fixed pattern is transmitted to the receiving side at a speed

(2400 to 9600 bps) designated by DCS, and the receiving sideoptimizes the automatic equalizer, etc., according to this signal.

TCF(Training Check)

——————— Sends 0 continuously for 1.5 seconds at the same speed as thetraining signal.

CFR(Confirmation to Receive)

X0100001 Notifies the sending side that TCF has been properly received. IfTCF is not properly received, FTT (Failure To Train) X0100010 isrelayed to the sender. The sender then reduces the transmissionspeed by one stage and initiates training once again.

Training 2 ——————— Used for reconfirming the receiving side like training 1.Image Signal Refer to the next page. ———————RTC(Return to Control)

——————— Sends 12 bits (0...01 × 6 times) to the receiver at the same speedas the image signal and notifies completion of transmission of thefirst sheet.

EOP(End of Procedure)

X1110100 End of one communication

MCF(Message Confirmation)

X0110001 End of 1 page reception

DCN(Disconnect)

X1011111 Phase E starts.

MPS(Multi-Page Signal)

X1110010 Completion of transmission of 1 page. If there are still moredocuments to be sent, they are output instead of EOP. After MCFreception, the sender transmits an image signal of the secondsheet.

PRI-EOP(Procedural Interrupt-EOP)

X1111100 If there is an operator call from the sender, it is output after RTC.

PIP(Procedural Interrupt Positive)

X0110101 This is output when an operator call is received.

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b. Redundancy Compression Process Coding ModeThis unit uses one-dimensional MH format.

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8.6.2. MODEM CIRCUIT OPERATION

The modem (IC5) has all the hardware satisfying the ITU-T standards mentioned previously.

When the ASIC IC1 (61) is brought to a low level, the modem (IC5) is chip-selected and the resistors inside IC are selected by theselect signals from ASIC (IC1) ADR0-ADR4. The commands are written through the data bus, and all the processing is controlledby the ASIC (IC1) according to ITU-T procedures. The INT signal dispatched from IRQ1, 2 (pins 108 and 121 of IC5) to ASIC (IC1)when the transmission data is accepted and the received data is demodulated, the ASIC (IC1) implements post processing. Thismodem (IC5) has an automatic application equalizer.

With training signal 1 or 2 during G3 reception, it can automatically establish the optimum equalizer. The modem (IC5) operatesusing the 32.256 MHz clock (X3).

1. Facsimile Transmission

The digital image data on the data bus is modulated in the modem (IC5), and sent from pin 69 via analog SW (IC10) and theNCU section to the telephone line.

Refer to CHECK SHEET (P.99)

2. Facsimile Reception

The analog image data which is received from the telephone line passes through the NCU section and enters pin 60 of themodem (IC5). The signals that enter pin 60 of the modem (IC5) are demodulated in the board to digital image signals, thenplaced on the data bus.

In this case, the image signals from the telephone line are transmitted serially. Hence, they are placed on the bus in 8 bit units.Here, the internal equalizer circuit reduces the image signals to a long-distance receiving level.

This is designed to correct the characteristics of the frequency band centered about 3 kHz and maintain a constant receivingsensitivity. It can be set in the service mode.

Refer to CHECK SHEET (P.99)

3. DTMF Transmission (Monitor tone)

The DTMF signal generated in the modem (IC5) is output from pin 69, and is then sent to the circuit on the same route as usedfor facsimile transmission.

Refer to CHECK SHEET (P.99)

(DTMF Monitor Tone)

Refer to CHECK SHEET (P.99)

4. Busy/Dial Tone Detection

The path is the same as FAX receiving. When it is detected, the carrier detect bit of the register in the modem (IC5) becomes1, and this status is monitored by the ASIC (IC1).

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8.7. ANALOG UNIT BLOCK DIAGRAM

+ -

+

-

+ -

+ -+ -

+ -

PA

PE

RR

LY

SP

MU

TE

5VA

5VA

5VA

24V

5VD

PC

4

RLY

1S

A1

SA

2

PC

2

T2

5VD

CDIC

121

FC

22

FC

13

VIN

V02

GN

D

VC

C

V01

4

8 7 6 5

5VA

2.0V

Ref

12V

2V

24V

A

TO

NE

2

PA

PE

R

5VD

+24

V

HO

OK

H/S

RX

TE

L R

X E

NB

HO

OK

5VD

H/S

RX

EN

B

MD

M T

X E

NB

TO

NE

1 E

NB

Ana

log

Dig

ital

LIN

E R

X

TO

NE

1

VO

LOU

TA

SIC

IC1

VO

LIN

SP

KR

M

SP

KR

P

LIN

EO

UT

SIA

IC5

2.0V

MIC

-

CN

3

SP

CN

9

SP

+H

/SS

P-

MIC

+

IC2

IC10

Ref

LIN

EIN

MIC

M

MIC

P

5VA

5V

Q1

OP

-PA

NE

L

MIC

24V

12V

24V

Ref

SP

KR

M

SP

KR

P

LIN

EO

UT

PIA

MIC

RE

F

LIN

EIN

MIC

M

MIC

P

12V

IC3

+

-

+ -

+ -

Line

CN

4

CP

C

BELL

JAM

JAM

5VD

+ ~

- ~+ -

H/S

TX

MU

TE

2V

RLY

KX

-FT

906/

908H

G-B

AN

ALO

G B

OA

RD

: BLO

CK

DIA

GR

AM

+ -

NC

EX

TT

EL

CN

5

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8.8. NCU SECTION

8.8.1. GENERAL

This section is the interface between the telephone line. It is composed of bell detection circuit, pulse dialing circuit, CPC detectioncircuit, line amplifier, sidetone circuits and Remote FAX activation circuit.

8.8.2. LINE RELAY (RLY1)

1. Circuit Operation

Normally, this relay switches to the external telephone side (Break) and switches to the open side (make) when the unit startsfacsimile communication.

[IC1 (130) High Level → CN2 (7)] → CN1 (7) → Q10 ON → RLY1 (make)

8.8.3. BELL DETECTION CIRCUIT

1. Circuit Operation

The signal waveform for each section is indicated below. The signal (low level section) input to pin 23 of ASIC IC1 on the digitalboard is read.

TEL LINE → PC2 (1, 2 - 4) → CN1(11) → [CN2(11) → IC1(23)]

8.8.4. PULSE DIALING

[IC1 (130) High Level → CN2 (7)] → CN1 (7) → Q10 ON → RLY1 (make)

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8.8.5. LINE AMPLIFIER AND SIDE TONE CIRCUITS

1. Circuit Operation

The reception signal received as output from line transformer T2 is given as input to C17, R13, IC3(2, 3) and IC3(1).Then it isinput to the reception system at an amplifier gain of 2.5 dB from pin (2).The transmission signal is input from CN1 pin (5), and output to the TEL line through C29, R29, R28 and T2. Without a sidetone circuit, the transmission signal would return to the reception amplifier via C29 and R28. Here, the signal output from CN1pin (5) passes through C29, R24, R18, C23 and R23, and enters the amplifier IC3 pin (3). This is used to cancel the returnportion of the transmission signal. This is the side tone circuit.

8.8.6. CPC (CALLING PARTY CONTROL) DETECTION CIRCUIT

1. Function

This circuit detects the signal (cuts the current) output from the converter when the other party finishes ICM recording

and goes into the ON-HOOK status.

TAD detects this signal and disconnects the line. When the TAD is operating, pin (4) of PC4 becomes a low level.

While detecting the CPC signal, pin (4) of PC4 becomes a high level. When the CPC signal is detected, the TAD operation

stops and the line is disconnected.

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8.9. ITS (INTEGRATED TELEPHONE SYSTEM) AND MONITOR SECTION

8.9.1. GENERAL

The general ITS operation is performed by the modem IC5. The alarm tone, the key tone, the calling tone and the beep are outputfrom the ASIC IC1 (digital board).

8.9.2. SPEAKER PHONE CIRCUIT

1. Function

The circuit controls the automatic switching of the transmitted and received signals, to and from the telephone line, when theunit is used in the hands-free mode.

2. Circuit Operation

The speakerphone can only provide duplex.

3. Signal path

Refer to CHECK SHEET (P.99)

8.9.3. HANDSET CIRCUIT

1. Function

This circuit controls the conversation over the handset, i.e. the transmitted and received voices to and from the handset.

2. Signal path

Refer to CHECK SHEET (P.99)

8.9.4. MONITOR CIRCUIT FOR EACH SIGNALS

1. Function

This circuit monitors various tones, such as 1 DTMF tone, 2 Alarm/Beep/Key tone/Bell 3 Dummy ring back tone.

2. Signal path

Refer to CHECK SHEET (P.99)

8.10. ATAS (AUTOMATIC TELEPHONE ANSWERING SYSTEM) SECTION 1. Function

The ATAS main operation is performed by the special IC5 (MODEM). IC6 (FLASH MEMORY)´s control signals are input fromASIC IC1.

a. Greeting/Message Recording

b. ICM Recording

c. Greeting/Message/ICM play to speaker

d. Greeting/Message/ICM play to Tel Line

e. Vox Detection

2. Signal Path

Refer to CHECK SHEET (P.99)

8.10.1. REMOTE RECEIVING

1. Function

This is the parallel connection DTMF signal for the TEL mode between a and b. When the other party is a FAX, the unit changesto FAX receiving.

2. Signal Path

Refer to CHECK SHEET (P.99)

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8.10.2. CIRCUIT DIAGRAM

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8.11. OPERATION BOARD SECTIONThe unit consists of an LCD (Liquid crystal display), KEYs and LED (light-emitting diode). They are controlled by the Gate Array(IC1) and ASIC (IC1: on the DIGITAL BOARD). The key matrix table is shown below.

IC1

ASIC

DIGITAL BOARD OPERATION BOARD

READ POSITION SENSORDOCUMENT SENSOR

CN7 CN1

(Chip on board type)

GATE ARRAYIC1

CN2

7X5KEYS

MATRIX

LED

KSL0~4

XLED13, 14 SW41SW42

XLED11,12XLED 15

LCD

LED5

KIN0KIN2~7

KX-FT906/908HG-B OPERATION BOARD: BLOCK DIAGRAM

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8.12. LCD SECTIONThe Gate Array (IC1) works only for writing the ASCII code from data bus (D4-D7). V0 is supplied for the crystal drive. R13 andR14 are density control resistors. Consequently, in this unit, the timing (positive clock) is generated by the LCD interfacecircuitry in the gate array (IC1).

Density Normal DarkLED1 (IC1-22pin) H L

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8.13. POWER SUPPLY BOARD SECTIONThis power supply board uses the switching regulator method.

InputCircuit

ACInput

Surgeabsorbercircuit

G

H

5V

24V

Kick-onVoltageCircuit

E

IC101

F

GND

ControlCircuit

R136R137

ConverterCircuit

C

D5VOutputCircuit

24VOutputCircuit

+

-

RectifierCircuit

A

B

C106

Error DetectingCircuit

Surgeabsorbercircuit

・O.C.L・Over voltage

Q101

A-B Voltage Wave Form

C-D Voltage Wave Form

E-FG-H Voltage Wave Form

0

0

0

Block Diagram

[Input Circuit]

The input current goes into the input rectifier circuit through the filter circuit. The filter circuit decreases the noise voltage and thenoise electric field strength.

[Rectifier Circuit]

The input current is rectified by D101,D102,D103 and D104 and charges C106 to make DC voltage. Then it supplies power to theconverter circuit.

[Kick-on voltage circuit]

Bias is applied to the Q101 gate via this circuit when the AC power is turned on and Q101 begins operating.

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The following is an overview of how the power supply unit is controlled.

The control method of this power supply unit is pulse width modulation.

When Q1 is ON, the energy is charged in the transfer primary coil according to E1. When Q1 is OFF, the energy is output from thesecondary transfer as follows.

L → D1 → Load → L

Then the power is supplied to the Load. When Q1 is ON, power is not output from the secondary side. The output voltage is fedback in the control IC according to the error amp rectifier. Then depending on how TON is controlled, stabilization occurs. Also, whenthe current load becomes too large, in order to decrease the voltage output, the increase in is controlled and the output voltageis stabilized.

Therefore, basically the timing: Ton/Toff of Q1 controls the output voltage.

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[Surge Absorber Circuit]

This circuit is for absorbing surge voltage generated by the transformer.

[Control Circuit and Detecting Circuit]

The control circuit amplifies the output with increased voltage detected in the error detecting circuit. Then it drives the maintransistor.

In this power supply, the duty ratio is defined by changing the ON period of the main transistor.

This is shown as follows.

When the output voltage of the 24V circuit increases, the current of the photo coupler PC101 increases, the pulse width of theoutput control IC becomes narrower and the ON period of Q101 becomes shorter.

[Over Current Limiter (O.C.L)]

The highest drain current (Q101) is limited by a limiter circuit (IC101) of 24V. The 24V output is limited by this circuit.

[Over Voltage Circuit]

If the 24V output increases because the error detecting circuit or control circuit is broken, IC101 will recognize this signal and outputbecomes 0V.

Dummy load method (to quickly check the power supply output)

Refer to POWER SUPPLY BOARD SECTION (P.102).

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9 REFERENCE MATERIAL DATA

9.1. TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES

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KX-FT906HG-B / KX-FT908HG-B

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9.2.1.1. For Power Supply Board • • • • SOLDER

Sparkle Solder 115A-1, 115B-1 OR Almit Solder KR-19,KR-19RMA

• • • • Soldering iron

Recommended power consumption is between 30 W to 40W.

Temperature of Copper Rod 662 ± 50°F (350 ± 10°C)

(An expert may handle a 60~80 W iron, but a beginnermight damage the foil by overheating.)

• • • • Flux

HI115 Specific gravity 0.863

(Original flux should be replaced daily.)

9.2.1.2. For P.C.Board with “PbF”marking

• • • • PbF (: Pb free) Solder

• • • • Soldering Iron

Tip Temperature of 700°F ± 20°F (370°C ± 10°C)

Note: We recommend a 30 to 40 Watt soldering iron. Anexpert may be able to use a 60 to 80 Watt iron wheresomeone with less experience could overheat and damagethe PCB foil.

• • • • Flux

Recommended Flux: Specific Gravity → 0.82.

Type → RMA (lower residue, non-cleaning type)

Note: See ABOUT LEAD FREE SOLDER (PbF: Pb free)(P.5).

9.2. HOW TO REPLACE THE FLAT PACKAGE ICEven if you do not have the special tools (for example, a spot heater) to remove the Flat IC, with some solder (large amount),a soldering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.

9.2.1. PREPARATION

9.2.2. FLAT PACKAGE IC REMOVAL PROCEDURE

1. Put plenty of solder on the IC pins so that the pins can be completely covered.

Note:

If the IC pins are not soldered enough, you may give pressure to the P.C. board when cutting the pins with a cutter.

2. Make a few cuts into the joint (between the IC and its pins) first and then cut off the pins thoroughly.

3. While the solder melts, remove it together with the IC pins.

When you attach a new IC to the board, remove all solder left on the land with some tools like a soldering wire. If some solderis left at the joint on the board, the new IC will not be attached properly.

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9.2.3. FLAT PACKAGE IC INSTALLATION PROCEDURE

1. Temporarily fix the FLAT PACKAGE IC, soldering the two marked pins.

*Check the accuracy of the IC setting with the corresponding solderingfoil.

2. Apply flux to all pins of the FLAT PACKAGE IC.

3. Solder the pins, sliding the soldering iron in the direction of the arrow.

9.2.4. BRIDGE MODIFICATION PROCEDURE

1. Lightly resolder the bridged portion.

2. Remove the remaining solder along the pins using a soldering iron as shown in the figure below.

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9.2.5. DIGITAL SPEAKERPHONE

The digital speakerphone has different features from the analog speakerphone.

The analog speakerphone switches between Tx or Rx. Either Tx or Rx is able to pass through a telephone line or speaker,depending on the Tx and Rx signal (voice) level. The higher-level signal (either TX or RX) can pass through the route.

Therefore, you never hear the other party´s voice while you are talking. However, the digital speakerphone allows you to hearthe other party´s voice while you are talking. So both Tx and Rx are active at the same time. There is also a defference in thetroubleshooting procedures between the two types.

At the start of communication, during the initial 2~3 correspondences, the digital speakerphone performs half-duplex operation,alternating between transmission (Tx) and reception (Rx). Then duplex communication becomes available.

Learning occurs during the initial 2~3 correspondences in order to set the appropriate parameters for duplex communication.

You cannot check the digital speaker phone by the signal route test mentioned in the Analog Board Section because the levelis always changing as stated above.

Therefore, there is a service function for this troubleshooting. In this service mode, you can set the mute to either Tx or Rx. Thenyou can check the signal route of the speaker phone Tx or the speaker phone Rx without any disturbances.

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Refer to ANALOG BOARD SECTION (P.99).

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9.3. TEST CHART

9.3.1. ITU-T No.1 TEST CHART

155

KX-FT906HG-B / KX-FT908HG-B

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9.3.2. ITU-T No.2 TEST CHART

156

KX-FT906HG-B / KX-FT908HG-B

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10 FIXTURES AND TOOLS

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KX-FT906HG-B / KX-FT908HG-B

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11 CABINET, MECHANICAL

11.1. OPERATION PANEL SECTION

158

KX-FT906HG-B / KX-FT908HG-B

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11.2. UPPER CABINET SECTION

159

KX-FT906HG-B / KX-FT908HG-B

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11.3. LOWER CABINET

CROSS REFERENCE:

MOTOR SECTION (P.161)

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11.4. MOTOR SECTION

11.4.1. KX-FT906HG-B

161

KX-FT906HG-B / KX-FT908HG-B

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11.4.2. KX-FT908HG-B

162

KX-FT906HG-B / KX-FT908HG-B

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11.5. ACTUAL SIZE OF SCREWS

163

KX-FT906HG-B / KX-FT908HG-B

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12 ACCESSORIES AND PACKING MATERIALS

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KX-FT906HG-B / KX-FT908HG-B

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1. RTL (Retention Time Limited)

Note:

The marking (RTL) indicates that the Retention Time islimited for this item.

After the discontinuation of this assembly in production, theitem will continue to be available for a specific period oftime. The retention period of availability is dependent on thetype of assembly, and in accordance with the lawsgoverning parts and product retention.

After the end of this period, the assembly will no longer beavailable.

2. Important safety notice

Components identified by mark have specialcharacteristics important for safety. When replacing any ofthese components, use only manufacture´s specified parts.

3. The S mark means the part is one of some identical parts.For that reason, it may be different from the installed part.

4. ISO code (Example: ABS-HB) of the remarks columnshows quality of the material and a flame resisting gradeabout plastics.

5. RESISTORS & CAPACITORS

Unless otherwise specified;

All resistors are in ohms (Ω) K=1000Ω, M=1000kΩ

All capacitors are in MICRO FARADS (µF) P=µµF

*Type & Wattage of Resistor

13.1. CABINET AND ELECTRICALPARTS

13.1.1. OPERATION PANEL SECTIONRef.No.

Part No. Part Name & Description Remarks

1 PFGV1017Y COVER,TEL CARD

2 PFGD1051N TEL CARD

3 PFGP1272V PANEL, LCD (KX-FT906HG-B) PC-HB

3 PFGP1264N PANEL, LCD (KX-FT908HG-B) PC-HB

4 PFGG1209H1 GRILLE,OPERATION PANEL PS-HB

5 PFDE1224Z LEVER, DOCUMENT DETECTION POM-HB

6 PFUV1071X COVER, OPERATION PS-HB

7 PFUV1073Z1 COVER,HOLD

8 PFDG1123Z GEAR, PLATEN

Ref.No.

Part No. Part Name & Description Remarks

9 PFDJ1021Z PLATEN SPACER, R POM-HB

10 PFDN1033Z ROLLER, PLATEN

11 PFDJ1020Z PLATEN SPACER, L POM-HB

12 PFHX1743Z PLASTIC PARTS,SHEET

13 PFHG1064Z SEPARATION RUBBER

14 PFUS1523Z SPRING,DOCUMEN FEED

15 PFDG1170Z GEAR, PLATEN POM-HB

16 PFDN1044Z ROLLER, PLATEN

17 PFUS1286Z SPRING, OPERATION EARTH

18 PFJE1050Z LEAD WIRE

19 PQJM128Z BUILTIN-MICROPHONE

20 WLK26YB04AA LEAD, MIC (B)

21 WLK26YR04AA LEAD, MIC (R)

22 PFDG1015Y GEAR,DOCUMENT GUIDE POM-HB

23 PFUS1222Z SPRING

24 PFKR1074Z1 DOCUMENT GUIDE,R ABS-HB

25 PFKR1073Z1 DOCUMENT GUIDE,L ABS-HB

26 PFUS1170Z SPRING,DOCUMENT LEVER

27 PFHR1434Z GUIDE, LCD

28 PFBX1217Z1 BUTTON,DIAL

29 PFBX1216Z1 BUTTON,COPY STOP

30 PFBC1111Z1 BUTTON,START ABS-HB

31 PFKS1103Z1 DOCUMENT,TRY ABS-HB

32 PFHX1829Z SHEET OPE,LEAD

33 PFBX1218Z1 BUTTON,FUNCTION NAVI

34 PFQT1435V LABEL,FACEDOWN

13.1.2. UPPER CABINET SECTIONRef.No.

Part No. Part Name & Description Remarks

60 PFKM1049Y1 HANDSET CRADLE PS-HB

61 PFJS02Q64Z CONNECTOR,2PIN

62 PFAS50P006Z SPEAKER

63 PFKV1095Z1 COVER,CUTTER (KX-FT906HG-B) PS-HB

63 PFKV1026Y1 COVER,CUTTER (KX-FT908HG-B) PS-HB

64 PFQT2305T LABEL, CUTTER CAUTION (KX-FT906HG-B)

64 PFQT2235T LABEL, CUTTER CAUTION (KX-FT908HG-B)

65 Not Used (KX-FT906HG-B)

65 PFDX1025Z CUTTER UNIT (KX-FT908HG-B)

66 PFUS1179Z SPRING,LOOK LEVER

67 PFDE1137Y1 LEVER,LOCK ABS+GF2

68 PFHR1132Z COVER,HEAD

69 PFBH1011Z1 BUTTON,HOOK ABS-HB

70 PFDE1135Y HEAD GUIDE,L POM-HB

71 PFHX1752Z SHEET,HEAD

72 PFJHS023Z THERMAL HEAD

73 PFDE1136Y HEAD GUIDE,R POM-HB

74 PFJS12Q80Z CONNECTOR,THERMAL

75 PFUS1176Z SPRING,OPERATION COVER OPEN

76 PFUS1318Z SPRING,THERMAL HEAD

77 PFUS1256Z SPRING,EARTH CUTTER

78 PFUS1257Z SPRING,EARTH HEAD

79 PFGT2497Z-C NAME PLATE (KX-FT906HG-B)

79 PFGT2496Z-C NAME PLATE (KX-FT908HG-B)

80 PFQT2306Z LABEL,PAPER CAUTION (KX-FT906HG-B)

80 PFQT2233Z LABEL,PAPER CAUTION (KX-FT908HG-B)

81 PFDR1045Z ROLLER

82 PFDF1017Z SHAFT

83 PFUS1171Z SPRING,ROLLER

84 PFJS07P37Z CONNECTOR,7 PIN

85 PFUS1463Z SPRING,IMAGE SENSOR

86 N2GZBE000009 IMAGE SCANNER

87 PFQT1186R LABEL,CAUTION

13 REPLACEMENT PARTS LIST

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13.1.3. LOWER CABINETRef.No.

Part No. Part Name & Description Remarks

100 PFHA1001Z RUBBER,LEG

101 PFMD1075Z FRAME,BOTTOM

102 PFDF1051Z SHAFT POM-HB

103 PFDE1133Z SPACER POM-HB

104 PFDR1015Z ROLLER SUPPORT

105 PFJS07P21Z CONNECTOR,7 PIN,LEAD POWER

106 PFHX1750Z SHEET,DIGITAL BORD

107 PFJS02Q82Z CONNECTOR,2 PIN

108 PQLB1E1 FERRITE CORE

109 PFJP03S04Z AC INLET

110 PQMX10010Z COVER,SUMI TUBE

111 KR06TT251508 LEAD WIRE,FERTH

112 WLR18YK30CM4 LEAD WIRE,EARTH

113 PFDE1097Z LEVER,PAPER SENSOR

114 PFUS1319Y SPRING,SENSOR

115 PFDE1134Z LEVER,JAM SENSOR PBT-VO

116 PQHR136Z CLAMPER

117 PFKM1131Y1 CABINET,BODY PS-VO

13.1.4. MOTOR SECTIONRef.No.

Part No. Part Name & Description Remarks

130 PFMH1084Z ANGLE, MOTOR PLATE

131 L6HAGCLK0002 MOTOR S

132 Not Used (KX-FT906HG-B)

132 PFHR1214Z ARM, CUTTER (KX-FT908HG-B)

133 Not Used (KX-FT906HG-B)

133 PFDG1174Y GEAR,CUTTER (KX-FT908HG-B) POM-HB

134 PFHX1413Z SPACER

135 PFDG1119Y GEAR POM-HB

136 PQST2A04Z SWITCH

137 PFJS03Q43Z CONNECTOR, 3 PIN

138 PFHR1218Z ARM POM-HB

139 PFDG1021Z GEAR,C POM-HB

140 PFUS1251Z SPRING,BACK

141 PFDG1167Z GEAR,MODE POM-HB

142 PFDG1168Z GEAR,MODE POM-HB

143 PFHR1216Z ARM POM-HB

144 PFUS1253Y SPRING,GEAR

145 PFDG1022Z GEAR,D POM-HB

146 PFUA1057Z CHASSIS,GEAR PBT-ABS

147 Not Used (KX-FT906HG-B)

147 PFUS1252Z SPRING,CUTTER (KX-FT908HG-B)

148 Not Used (KX-FT906HG-B)

148 PFHR1215Z ARM,CUTTER (KX-FT908HG-B) POM-HB

149 Not Used (KX-FT906HG-B)

149 PFJS03Q79Z CONNECTOR, 3 PIN (KX-FT908HG-B)

150 Not Used (KX-FT906HG-B)

150 PFDG1129Z GEAR S (KX-FT908HG-B) POM-HB

151 Not Used (KX-FT906HG-B)

151 PFDG1134Z GEAR,C (KX-FT908HG-B) POM-HB

152 Not Used (KX-FT906HG-B)

152 PFDG1173Z GEAR,CUTTER (KX-FT908HG-B) POM-HB

153 Not Used (KX-FT906HG-B)

153 PFDG1132Y GEAR,A (KX-FT908HG-B) POM-HB

154 PFDG1172Z GEAR,BASE POM-HB

155 PFHR1217Z ARM POM-HB

156 Not Used (KX-FT906HG-B)

156 PFHR1213Z ARM,CUTTER (KX-FT908HG-B) POM-HB

157 PFDG1171Z GEAR,SENDING POM-HB

158 PFDG1169Z GEAR POM-HB

159 PFHR1436Y COVER, GEAR CHASSIS

160 PFDG1362Z GEAR,D (KX-FT906HG-B)

13.1.5. ACCESSORIES AND PACKINGMATERIALS

Ref.No.

Part No. Part Name & Description Remarks

A1 PQJA10038Y POWER CORD

A2 PQJA10075Z TEL CORD

A3 PQJA10126X CURL CORD

A4 PQUS1524Z DOCUMENT STACKER

A5 PQHP10023Z THERMAL RECORDING PAPER

A6 PFJXE1001Z HANDSET

A7 PFQX2063Z INSTRUCTION BOOK

A8 PQQX9957Z PROTECTION PAPER

P1 PFZE1258Z-C GIFT BOX ASS´Y (KX-FT906HG-B)

P1 PFZE1262Z-C GIFT BOX ASS´Y (KX-FT908HG-B)

P2 PFPN1338Z CUSHION

P3 PFPN1337Z CUSHION

P4 PQPP10005Z PROTECTION COVER

P5 PFPH1030Z PACKING

13.2. DIGITAL BOARD PARTSRef.No.

Part No. Part Name & Description Remarks

PCB1 PFWP1FT906HG DIGITAL BOARD ASS`Y (RTL)(KX-FT906HG-B)

PCB1 PFWP1FT908HG DIGITAL BOARD ASS`Y (RTL)(KX-FT908HG-B)

PCB1-1 PFLP1551MLZ DIGITAL BOARD ASS`Y (RTL)(without ROM)

(ICS)

IC1 C1ZBZ0001896 IC

IC2 PFWIFT906HG IC (ROM) (KX-FT906HG-B)

IC2 PFWIFT908HG IC (ROM) (KX-FT908HG-B)

IC3 PFVII5510011 IC

IC4 C3BBHC000330 IC

IC5 PFVIR675814 IC

IC6 C3FBKC000108 IC

IC7 PFVIT2003APS IC S

IC8 PFVITVT245FT IC S

IC9 PQVINJM2904F IC S

IC10 PQVITC4066BF IC S

IC12 PQVIMC34119M IC S

(TRANSISTORS)

Q1 2SB1322 TRANSISTOR(SI) S

Q2 PFVTSI4431DY TRANSISTOR(SI) S

Q3 PQVTDTC143E TRANSISTOR(SI) S

Q4 PQVTDTC143E TRANSISTOR(SI) S

Q5 2SD1819A TRANSISTOR(SI) S

Q6 2SD1819A TRANSISTOR(SI) S

Q7 2SB1197K TRANSISTOR(SI) S

Q9 2SD1819A TRANSISTOR(SI) S

Q11 2SD1819A TRANSISTOR(SI) S

(DIODES)

D1 PFVDRMRLS245 DIODE(SI) S

D2 MA7200 DIODE(SI) S

D3 PFVDRMRLS245 DIODE(SI) S

D4 MA729 DIODE(SI) S

(CONNECTORS)

CN1 PQJP7G30Y CONNECTOR,7 PIN S

CN2 PQJP16A19Z CONNECTOR,16 PIN S

CN3 PQJP5G30Z CONNECTOR,5 PIN S

CN4 PQJP12G30Z CONNECTOR,12 PIN S

CN5 PQJP2G30Y CONNECTOR,2 PIN S

CN6 PQJP02G100Z CONNECTOR,2 PIN

CN7 PFJS12A13Z CONNECTOR,12 PIN

CN8 PQJP7G30Z CONNECTOR,7 PIN S

CN9 PQJP02G100Z CONNECTOR,2 PIN

(COILS)

166

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Ref.No.

Part No. Part Name & Description Remarks

L1 PQLQR2KA20T COIL S

L6 PQLQR2KA20T COIL S

L9 J0JCC0000042 COIL S

L10 J0JCC0000042 COIL

L11 PQLQR2KA113 COIL S

L12 PQLQR2KA20T COIL S

L19 PQLQR2KA20T COIL S

L20 PQLQR2KA20T COIL S

(BATTERY)

BAT1 PFSU1004Z LITHIUM BATTERY !S

(COMPONENTS PARTS)

RA1 EXB38V101JV RESISTOR ARRAY S

RA2 EXB38V101JV RESISTOR ARRAY S

RA3 EXB38V101JV RESISTOR ARRAY S

RA4 EXB38V101JV RESISTOR ARRAY S

RA7 EXB38V101JV RESISTOR ARRAY S

RA8 EXB38V101JV RESISTOR ARRAY S

(CRYSTAL OSCILLATORS)

X1 H0A327200045 CRYSTAL OSCILLATOR

X2 H2D240500001 CRYSTAL OSCILLATOR

X3 H0D322500001 CRYSTAL OSCILLATOR S

(FUSES)

F1 PFRB0031125T FUSE S

F2 PFRB001251KC FUSE S

(RESISTORS)

L2 ERJ3GEY0R00 0

L3 ERJ3GEYJ101 100

L4 ERJ3GEYJ101 100

L5 ERJ3GEYJ101 100

L7 ERJ3GEYJ101 100

L8 ERJ3GEYJ101 100

L13 ERJ3GEY0R00 0

L14 ERJ3GEY0R00 0

L15 ERJ3GEY0R00 0

L17 ERJ3GEY0R00 0

L18 ERJ3GEY0R00 0

R1 ERJ3GEYJ472 4.7K

R2 ERJ3GEYJ472 4.7K

R3 ERJ3GEYJ102 1K

R4 ERJ3GEYJ102 1K

R7 ERJ3GEYJ271 270

R8 ERJ3GEYJ124 120K

R10 ERG2SJ152 1.5K

R11 ERJ3GEY0R00 0

R12 ERJ3GEYJ101 100

R13 ERJ3GEYJ101 100

R14 ERJ3GEYJ101 100

R15 ERJ3GEYJ101 100

R16 ERJ3GEYJ101 100

R17 ERJ3GEYJ101 100

R19 ERJ3GEYJ821 820

R20 ERDS1VJ152 1.5K S

R21 ERJ3GEYJ562 5.6K

R22 ERJ3GEYJ472 4.7K

R23 ERJ3GEYJ101 100

R24 ERJ3GEYJ101 100

R25 ERJ3GEYJ101 100

R26 ERJ3GEYJ101 100

R27 ERJ3GEYJ101 100

R28 ERJ3GEYJ472 4.7K

R29 ERJ3GEYJ223 22K

R30 ERJ3GEYJ433 43K

R31 ERJ3GEYJ4R7 4.7

R32 ERJ3GEYJ222 2.2K

R33 ERJ3GEYJ203 20K

R35 ERJ3GEYJ472 4.7K

R36 ERJ3GEYJ333 33K

Ref.No.

Part No. Part Name & Description Remarks

R38 ERJ3GEYJ101 100

R39 ERJ3GEYJ101 100

R40 ERJ3EKF1101 1.1K

R41 ERJ3EKF3602 36K

R42 ERJ3GEYJ101 100

R44 ERJ3GEYJ101 100

R46 ERJ3GEYJ334 330K

R47 ERJ3GEYJ475 4.7M

R48 ERJ3GEYJ222 2.2K

R49 ERJ3GEYJ101 100

R50 ERJ3GEYJ101 100

R51 ERJ3GEYJ471 470

R52 ERJ3GEYJ101 100

R54 ERJ3GEYJ101 100

R57 ERJ3GEYJ102 1K

R58 ERJ3GEY0R00 0

R59 ERJ3GEYJ470 47

R61 ERJ3GEYJ105 1M

R62 ERJ3GEYJ104 100K

R63 ERJ3GEYJ103 10K

R64 ERJ3GEY0R00 0

R65 ERJ3GEYJ101 100

R66 ERJ3GEYJ101 100

R67 ERG2SJ391 390

R68 ERJ3GEYJ222 2.2K

R69 ERJ3GEYJ473 47K

R70 ERJ3GEY0R00 0

R74 ERJ3GEYJ103 10K

R76 ERJ3GEYJ103 10K

R77 ERJ3GEYJ123 12K

R78 ERJ3GEYJ104 100K

R79 ERJ3GEYJ163 16K

R80 ERJ3GEYJ181 180

R81 ERJ3GEYJ222 2.2K

R82 ERJ3GEYJ472 4.7K

R83 ERJ3GEY0R00 0

R84 ERJ3GEYJ393 39K

R85 ERJ3GEY0R00 0

R88 ERJ3GEYJ123 12K

R89 ERJ3GEYJ822 8.2K

R9 ERJ3GEY0R00 0

R92 ERJ3GEYJ334 330K

R93 ERJ3GEYJ363 36K

R97 ERJ3GEYJ222 2.2K

R99 ERJ3GEYJ222 2.2K

R100 ERJ3GEYJ101 100

R101 ERJ3GEYJ101 100

R103 ERJ3GEYJ682 6.8K

R104 ERJ3GEYJ222 2.2K

R107 ERJ3GEYJ102 1K

R108 ERJ3GEYJ222 2.2K

R109 ERJ3GEYJ102 1K

R110 ERJ3GEYJ561 560

R111 ERJ3GEYJ103 10K

R112 ERJ3GEYJ272 2.7K

R113 PQ4R18XJ220 22 S

R114 ERJ3GEYJ334 330K

R115 ERJ3GEYJ102 1K

R116 ERJ3GEYJ153 15K

R117 ERJ3GEYJ103 10K

R118 ERJ3GEYJ103 10K

R121 PQ4R10XJ000 0 S

R122 ERJ3GEYJ124 120K

R123 ERJ3GEYJ124 120K

R124 ERJ3GEYJ273 27K

(CAPACITORS)

C1 ECUV1H102KBV 0.001

C3 ECUV1H102KBV 0.001

C7 ECUV1H102KBV 0.001

C9 ECUV1E104ZFV 0.1

C11 ECUV1E104ZFV 0.1

C12 PQCUV1H104ZF 0.1

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Ref.No.

Part No. Part Name & Description Remarks

C13 ECEA0JKA101 100 S

C15 ECUV1H102KBV 0.001

C16 ECUV1E104ZFV 0.1

C17 ECUV1E104ZFV 0.1

C18 ECUV1E104ZFV 0.1

C19 ECUV1H101JCV 100P

C20 ECUV1E104ZFV 0.1

C23 ECUV1E104ZFV 0.1

C24 ECUV1E104ZFV 0.1

C25 ECUV1E104ZFV 0.1

C26 ECUV1H222KBV 0.0022

C27 ECUV1E104ZFV 0.1

C28 ECUV1E104ZFV 0.1

C29 ECUV1E104ZFV 0.1

C30 ECUV1C104KBV 0.1

C31 ECUV1E104ZFV 0.1

C32 ECUV1E104ZFV 0.1

C33 ECUV1C104KBV 0.1

C34 ECUV1H102KBV 0.001

C35 ECUV1H150JCV 15P

C36 ECUV1E104ZFV 0.1

C38 ECUV1E104ZFV 0.1

C39 ECUV1H120JCV 12P

C40 ECUV1E104ZFV 0.1

C41 ECUV1E104ZFV 0.1

C42 ECUV1E104ZFV 0.1

C43 ECUV1E104ZFV 0.1

C44 ECUV1E104ZFV 0.1

C45 ECUV1E104ZFV 0.1

C48 ECUV1E104ZFV 0.1

C49 ECUV1E104ZFV 0.1

C50 ECUV1E104ZFV 0.1

C51 ECUV1E104ZFV 0.1

C52 ECUV1E104ZFV 0.1

C55 ECUV1E104ZFV 0.1

C56 ECUV1C104KBV 0.1

C58 ECUV1C104KBV 0.1

C59 ECUV1H103KBV 0.01

C60 ECUV1C104KBV 0.1

C62 ECUV1H080DCV 8P

C64 ECUV1H472KBV 0.0047 S

C65 ECUV1C104KBV 0.1

C66 ECUV1H080DCV 8P

C67 ECUV1E104ZFV 0.1

C68 ECUV1H330JCV 33P

C70 ECUV1H681JCV 680P S

C71 ECUV1E104ZFV 0.1

C73 ECUV1E104ZFV 0.1

C74 ECUV1E104ZFV 0.1

C76 ECUV1E104ZFV 0.1

C78 ECEA0JKA470 47 S

C81 ECUV1E104ZFV 0.1

C82 ECUV1C104KBV 0.1

C84 ECUV1H101JCV 100P

C85 ECUV1E104ZFV 0.1

C86 ECUV1E104ZFV 0.1

C88 ECUV1E104ZFV 0.1

C90 ECUV1E104ZFV 0.1

C92 ECUV1C333KBV 0.033

C93 ECUV1E104ZFV 0.1

C94 ECUV1C104KBV 0.1

C95 ECUV1C104KBV 0.1

C96 ECUV1C104KBV 0.1

C97 ECUV1E104ZFV 0.1

C99 ECUV1E104ZFV 0.1

C100 ECUV1E104ZFV 0.1

C101 ECUV1C104KBV 0.1

C102 ECEA1CKA100 10 S

C103 ECEA1CKA100 10 S

C104 ECUV1H101JCV 100P

C105 ECUV1E104ZFV 0.1

C106 ECUV1E104ZFV 0.1

C107 ECUV1C333KBV 0.033

Ref.No.

Part No. Part Name & Description Remarks

C108 ECUV1C104KBV 0.1

C109 ECEA1CKA100 10 S

C110 ECEA1CKA100 10 S

C111 ECUV1E104ZFV 0.1

C112 ECUV1H102KBV 0.001

C113 ECEA1CKA100 10 S

C115 ECUV1C104KBV 0.1

C116 ECUV1H331JCV 330P S

C120 ECUV1E104ZFV 0.1

C123 ECEA1HKA4R7 4.7 S

C126 ECUV1H102KBV 0.001

C127 ECUV1C104KBV 0.1

C129 ECUV1C104KBV 0.1

13.3. ANALOG BOARD PARTSRef.No.

Part No. Part Name & Description Remarks

PCB2 PFLP1552HGZ ANALOG BOARD (RTL)

(ICs)

IC2 C0AABB000025 IC

IC3 C0ABEB000038 IC

(TRANSISTORS)

Q1 2SC4155S TRANSISTOR(SI) S

Q2 PQVTDTC114EU TRANSISTOR(SI) S

Q3 PQVTDTC114EU TRANSISTOR(SI) S

Q9 2SC4155R TRANSISTOR(SI) S

Q10 PQVTDTC143E TRANSISTOR(SI) S

Q11 PQVTDTC143E TRANSISTOR(SI) S

(DIODES)

D1 MA4047 DIODE(SI) S

D2 MA4056 DIODE(SI) S

D3 MA4056 DIODE(SI) S

D12 1SS119 DIODE(SI) S

D13 1SS119 DIODE(SI) S

D14 1SS119 DIODE(SI) S

(JACK AND CONNECTOR)

CN1 PQJS16A10Z CONNECTOR, 16 PIN S

CN3 PQJJ1TB18Z JACK S

CN4 PFJJ1T006Z JACK S

CN5 PFJJ1T006Z JACK S

(SWITCHES)

SW1 PFSH1A03Z PUSH SWITCH S

SW2 ESE14A211 PUSH SWITCH

SW3 PFSH1A03Z PUSH SWITCH S

(COILS)

L1 PQLQR2KA113 COIL S

L3 PQLQR2KA113 COIL S

L4 PQLQR2KA113 COIL S

L7 PQLQR2KA113 COIL S

L10 PQLQR2KA113 COIL S

L22 PQLQR1RS102 COIL S

L23 PQLQR1RS102 COIL S

L24 PQLQR1RS102 COIL S

L25 PQLQR1RS102 COIL S

L26 PQLQR2BT COIL S

L27 PQLQR2BT COIL S

L32 PQLQR2BT COIL S

L33 PQLQR2BT COIL S

(PHOTO ELECTRIC TRANSDUCERS)

PC2 PQVIPC814K PHOTO COUPLER !S

PC4 PFVITLP320 PHOTO COUPLER !S

(RELAY)

RLY1 PFSL003Z RELAY S

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Ref.No.

Part No. Part Name & Description Remarks

(VARISTORS)

SA1 PQVDDSS301L VARISTOR (SURGE ABSORBER) !S

SA2 J0LS00000024 VARISTOR (SURGE ABSORBER)

(TRANSFORMER)

T2 G4A1A0000151 TRANSFORMER

(RESISTORS)

L2 ERJ3GEY0R00 0

L5 ERJ3GEY0R00 0

L6 ERJ3GEY0R00 0

L8 ERJ3GEY0R00 0

L9 ERJ3GEY0R00 0

L11 ERJ3GEY0R00 0

L12 ERJ3GEY0R00 0

L13 ERJ3GEY0R00 0

L14 ERJ3GEY0R00 0

L15 ERJ3GEY0R00 0

L17 ERJ3GEY0R00 0

L18 ERJ3GEY0R00 0

L28 ERJ3GEY0R00 0

L29 ERJ3GEY0R00 0

L30 ERJ3GEY0R00 0

L31 ERJ3GEY0R00 0

R1 ERJ3GEYJ101 100

R2 ERJ3GEYJ103 10K

R3 ERJ3GEYJ101 100

R4 ERJ3GEYJ472 4.7K

R5 ERJ3GEY0R00 0

R6 ERJ3GEYJ472 4.7K

R7 ERJ3GEYJ101 100

R8 ERJ3GEYJ103 10K

R9 ERJ3GEYJ103 10K

R10 ERJ3GEYJ154 150K

R11 ERJ3GEYJ124 120K

R12 ERJ3GEYJ472 4.7K

R13 ERJ3GEYJ753 75K

R14 ERJ3GEY0R00 0

R15 ERJ3GEYJ753 75K

R16 ERJ3GEYJ273 27K

R17 ERJ3GEYJ683 68K

R18 ERJ3GEYJ753 75K

R20 ERJ3GEYJ224 220K

R21 ERJ3GEYJ224 220K

R22 ERJ3GEYJ393 39K

R23 ERJ3GEYJ472 4.7K

R24 ERJ3GEYJ124 120K

R25 ERJ3GEYJ364 360K

R26 ERJ3GEYJ103 10K

R28 ERDS2TJ221 220 S

R30 ERJ3GEYJ123 12K

R32 ERJ3GEYJ682 6.8K

R35 ERJ3GEYJ223 22K

R36 ERJ3GEYJ363 36K

R40 ERJ3GEY0R00 0

R44 ERJ3GEYJ222 2.2K

R45 ERJ3GEYJ222 2.2K

R47 ERDS1TJ183 18K S

R49 ERJ3GEYJ564 560K

R51 ERJ3GEYJ222 2.2K

R52 ERG2SJ121 120

R54 ERJ3GEYJ304 300K

R55 ERJ3GEYJ331 330

R56 ERJ3GEYJ304 300K

R57 ERDS1TJ103 10K S

R58 ERJ3GEYJ682 6.8K

R60 ERJ3GEY0R00 0

R61 ERJ3GEYJ123 12K

R63 ERJ3GEYJ332 3.3K

R64 ERJ3GEYJ332 3.3K

R65 ERJ3GEYJ473 47K

R66 ERJ3GEYJ220 22

R67 ERJ3GEYJ222 2.2K

Ref.No.

Part No. Part Name & Description Remarks

R68 ERDS2TJ221 220 S

R70 ERJ3GEYJ152 1.5K

R71 ERJ3GEYJ152 1.5K

R73 ERJ3GEYJ331 330

R79 ERJ3GEY0R00 0

R81 ERJ3GEYJ103 10K

R84 ERJ3GEYJ105 1M

(CAPACITORS)

C1 ECUV1H103KBV 0.01

C2 ECUV1H103KBV 0.01

C4 ECEA1HKA4R7 4.7 S

C5 ECUV1H103KBV 0.01

C6 ECEA0JKA470 47 S

C7 ECUV1E104ZFV 0.1

C8 ECUV1H121JCV 120P

C11 ECUV1C473KBV 0.047

C12 ECUV1C104KBV 0.1

C13 ECUV1H100DCV 10P

C14 ECUV1H392KBV 0.0039

C15 ECEA1CKA100 10 S

C17 ECUV1C393KBV 0.039

C19 ECUV1C683KBV 0.068

C20 ECUV1E104ZFV 0.1

C21 ECUV1C393KBV 0.039

C22 ECUV1H100DCV 10P

C24 ECUV1H390JCV 39P

C25 PQCUV1H104ZF 0.1

C26 ECUV1C223KBV 0.022

C29 ECEA1HKA4R7 4.7 S

C31 ECUV1C473KBV 0.047

C32 ECUV1C104KBV 0.1

C37 ECUV1E104ZFV 0.1

C38 ECUV1H101JCV 100P

C40 ECUV1C104KBV 0.1

C41 ECUV1H221JCV 220P S

C45 ECUV1H100DCV 10P

C48 ECQE2E105KZ 1 S

C51 ECUV1H472KBV 0.0047 S

C52 ECUV1H104KBV 0.1

C53 ECUV1H104KBV 0.1

C55 ECEA0JKA470 47 S

C56 ECUV1H103KBV 0.01

C58 ECEA1CKA100 10 S

C61 ECUV1H103KBV 0.01

C62 ECEA0JKA470 47 S

C63 ECUV1H103KBV 0.01

C65 ECUV1H103KBV 0.01

C74 ECUV1H103KBV 0.01

C76 ECUV1C104KBV 0.1

(THERMISTOR)

POS1 PFRT002 THERMISTOR !S

13.4. OPERATION BOARD PARTSRef.No.

Part No. Part Name & Description Remarks

PCB3 PFWP2FT907LA OPERATION BOARD KIT (RTL)

PCB3-1 PFSH1A003Z SWITCH (SW44)

(ICS)

IC1 C1ZBZ0002089 IC

(TRANSISTORS)

Q1 2SD1819A TRANSISTOR(SI) S

(DIODE)

LED1 LNJ801LPDJA DIODE(SI)

(LIQUID CRYSTAL DISPLAY)

CN1 PFJS12A13Z LIQUID CRYSTAL DISPLAY

CN2 PFAVM220 LIQUID CRYSTAL DISPLAY

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Ref.No.

Part No. Part Name & Description Remarks

(PHOTO ELECTRIC TRANSDUCERS)

PS1 CNA1006N PHOTO SENSOR

(SWITCHES)

SW1 EVQ11Y05B SWITCH S

SW2 EVQ11Y05B SWITCH S

SW3 EVQ11Y05B SWITCH S

SW4 EVQ11Y05B SWITCH S

SW5 EVQ11Y05B SWITCH S

SW6 EVQ11Y05B SWITCH S

SW7 EVQ11Y05B SWITCH S

SW8 EVQ11Y05B SWITCH S

SW9 EVQ11Y05B SWITCH S

SW10 EVQ11Y05B SWITCH S

SW11 EVQ11Y05B SWITCH S

SW12 EVQ11Y05B SWITCH S

SW13 EVQ11Y05B SWITCH S

SW14 EVQ11Y05B SWITCH S

SW15 EVQ11Y05B SWITCH S

SW16 EVQ11Y05B SWITCH S

SW17 EVQ11Y05B SWITCH S

SW18 EVQ11Y05B SWITCH S

SW19 EVQ11Y05B SWITCH S

SW20 EVQ11Y05B SWITCH S

SW21 EVQ11Y05B SWITCH S

SW22 EVQ11Y05B SWITCH S

SW23 EVQ11Y05B SWITCH S

SW24 EVQ11Y05B SWITCH S

SW25 EVQ11Y05B SWITCH S

SW26 EVQ11Y05B SWITCH S

SW27 EVQ11Y05B SWITCH S

SW28 EVQ11Y05B SWITCH S

SW29 EVQ11Y05B SWITCH S

SW30 EVQ11Y05B SWITCH S

SW31 EVQ11Y05B SWITCH S

SW32 EVQ11Y05B SWITCH S

SW33 EVQ11Y05B SWITCH S

SW34 EVQ11Y05B SWITCH S

SW35 EVQ11Y05B SWITCH S

SW36 EVQ11Y05B SWITCH S

SW37 EVQ11Y05B SWITCH S

SW38 EVQ11Y05B SWITCH S

SW39 EVQ11Y05B SWITCH S

SW40 EVQ11Y05B SWITCH S

SW41 EVQ11Y05B SWITCH S

SW42 EVQ11Y05B SWITCH S

(RESISTORS)

R3 ERJ3GEYJ332 3.3K

R4 ERJ3GEYJ564 560K

R5 ERJ3GEYJ223 22K

R6 ERJ3GEYJ682 6.8K

R7 ERJ3GEYJ331 330

R8 ERJ3GEYJ331 330

R9 ERJ3GEYJ101 100

R10 ERJ3GEYJ472 4.7K

R11 ERJ3GEYJ331 330

R12 ERJ3GEYJ563 56K

R13 ERJ3GEYJ273 27K

R14 ERJ3GEYJ561 560

R17 ERJ3GEYJ271 270

R24 ERJ3GEY0R00 0

R25 ERJ3GEYJ4R7 4.7

R44 ERJ3GEY0R00 0

R45 ERJ3GEY0R00 0

R46 ERJ3GEY0R00 0

R47 ERJ3GEY0R00 0

R48 ERJ3GEY0R00 0

R49 ERJ3GEYJ101 100

R50 ERJ3GEYJ472 4.7K

R51 ERJ3GEYJ101 100

R52 ERJ3GEYJ472 4.7K

Ref.No.

Part No. Part Name & Description Remarks

R53 PQ4R18XJ000 0 S

(CAPACITORS)

C3 ECUV1E104ZFV 0.1

C5 ECEA0JKA221 220 S

C7 ECUV1H331JCV 330P S

C8 ECUV1H121JCV 120P

C9 ECUV1H331JCV 330P S

C10 ECUV1H681JCV 680P S

C11 ECUV1C104KBV 0.1

C12 ECUV1H103KBV 0.01

C13 ECEA0JKA470 47 S

C14 ECUV1H103KBV 0.01

C15 ECUV1E104ZFV 0.1

C16 ECUV1E104ZFV 0.1

C18 ECUV1C224ZFV 0.22 S

C19 ECUV1H103KBV 0.01

C22 ECUV1C103KBV 0.01

C23 ECUV1C103KBV 0.01

13.5. POWER SUPPLY BOARDPARTS

Ref.No.

Part No. Part Name & Description Remarks

PCB4 N0AC2GJ00004 POWER SUPPLY BOARD ASS´Y(RTL)

(ICs)

IC101 PQVIFA5511P IC

IC201 AN1431T IC

IC202 AN7805F IC

(TRANSISTOR)

Q101 2SK2647 TRANSISTOR(SI)

(DIODES)

D101 PFVD1N4005 DIODE(SI) S

D102 PFVD1N4005 DIODE(SI) S

D103 PFVD1N4005 DIODE(SI) S

D104 PFVD1N4005 DIODE(SI) S

D105 PFVDEG01C DIODE(SI) S

D106 1SS133 DIODE(SI)

D108 PFVDAU02Z DIODE(SI) S

D201 PFVDSF5LC20U DIODE(SI) S

D202 PFVDD1NL20U DIODE(SI) S

(COIL)

L101 ELF15N006A COIL

(COMPONENT PART)

L103 EXCELDR35 COMPONENT PART

(CONNECTORS)

CN301 PQJPB7BPHKL CONNECTOR,7 PIN

CN31 PQJP2D98Z CONNECTOR,2 PIN

(FUSE)

F101 PFBA2153.15 FUSE S

(PHOTO ELECTRIC TRANSDUCER)

PC101 0N3171 PHOTO COUPLER S

(THERMISTOR)

TH101 PFRT57235S80 THERMISTOR S

(TRANSFORMER)

T101 PFLTSRW226V TRANSFORMER S

(VARIABLE RESISTOR)

VR201 EVNDXAA03B53 VARIABLE RESISTOR

170

KX-FT906HG-B / KX-FT908HG-B

Page 171: Panasonic Kx Ft906hg b 908hg b

Ref.No.

Part No. Part Name & Description Remarks

(VARISTOR)

ZNR1 ERZV10DK751 VARISTOR

(RESISTORS)

J5 ERJ3GEY0R00 0

R101 ERDS1J105 1M

R102 ERDS2J394 390k

R103 ERDS2J394 390k

R106 ERG2SJ470 47

R107 ERG2DJ154E 150k

R108 ERDS2FJ150 15

R109 ERDS2TJ100 10

R121 ERJ3GEYJ103 10k

R122 ERJ3GEYJ271 270

R124 ERJ3GEYJ181 180

R126 ERJ3GEYJ823 82k

R127 ERJ3GEYJ182 1.8k

R128 ERJ6GEYJ101 100 S

R136 ERJ6GEYJ224 220k S

R137 ERJ6GEYJ224 220k S

R202 ERG2SJ332E 3.3k

R203 ERDS1FVJ470 47

R221 ERJ3GEYJ222 2.2k S

R222 ERJ3GEYJ222 2.2k S

R223 ERJ3GEYJ101 100 S

R224 ERJ3GEYJ273 27k S

R225 ERJ3GEYJ332 3.3k S

(CAPACITORS)

C101 ECQU2A224MV 0.22

C102 ECQU2A104MV 0.1

C103 PFKD2E3KH102 0.001 S

C105 PFKD2E3KH222 0.0022

C106 UEB2W560U 56 S

C108 ECKD3A102KBP 0.001

C109 PFCEA50YXA22 22

C110 PFKDEGA222M 0.0022 S

C119 ECKD3A470KBP 47p

C121 ECUV1H472KBV 0.0047

C122 ECUV1A224KBV 0.22

C123 ECUV1H103KBV 0.01

C124 ECUV1A474KBV 0.4 S

C125 ECUV1H471JCV 470p

C126 ECUV1H104KCV 0.1

C201 PFCEA35F471 470 S

C202 ECKN3A102KBP 0.001

C203 PFCEA16A470 470 S

C204 PFCEA35A47M 47 S

C205 PFCEA50A1M 1 S

13.6. FIXTURES AND TOOLSRef.No.

Part No. Part Name & Description Remarks

EC1 PQZZ7K5Z CONNECTOR, 7P

EC2 PFZZ16K5Z CONNECTOR, 16P

EC3 PQZZ2K1Z CONNECTOR, 2P

EC4 PFZZ5K13Z CONNECTOR, 5P

EC5 PFZZ12K4Z CONNECTOR, 12P

EC6 PQZZ2K12Z CONNECTOR, 2P

EC7 PQZZ12K4Z CONNECTOR, 12P

EC8 PQZZ2K13Z CONNECTOR, 2P

EC9 PFJE1050Z LEAD WIRE

KM79811245C0 BASIC FACSIMILE TECHNIQUE

(For training servicetechnicians)

Notes:

Tools and Extension Cords are useful for servicing.(They make servicing easy.)

171

KX-FT906HG-B / KX-FT908HG-B

Page 172: Panasonic Kx Ft906hg b 908hg b

14 MEMO

172

KX-FT906HG-B / KX-FT908HG-B

Page 173: Panasonic Kx Ft906hg b 908hg b

15 P

RIN

TE

DC

IRC

UIT

BO

AR

D15

.1.

DIG

ITA

LB

OA

RD

(PC

B1)

15.1

.1.

DIG

ITA

LB

OA

RD

:C

OM

PO

NE

NT

VIE

W

KX

-FT

906/

908H

G-B

: D

IGIT

AL

BO

AR

D :

CO

MP

ON

EN

T V

IEW

+24V

+5VD

R38R39

R42

109

144

+2.5

V/BA

TIN

L11C69

R124D4

C87

X3

AMO

N

R11

IC7

CN3 CN6 CN5

1

1

1 2 12CN7

L19

1

2

5

XRESET

98 1

16

C2R31

C22

L4

L6

C128

L9

32

Q1

E

E

R19

AB

Q4

R20

REF-CH

PCB-CH

AUTO

-CH

D2

D1

1

IC2

17

1 16

CN2

R27

R26

R25

R24

R52

R71

103 12810

265

C61

IC5

64IC

11

916

81

3938

1

R50

R70

R80

C64

C52

2011

110C21

+3.3VD

CN4

R16

R75

R73

R82C23F1

1.25

A

C100

C102

C99

C68

R83

C67

C9R6

9R6

8

R49

R23

R32

R35

L1L7

L5 L3L8 R7

C19

RA1

116

3217

3217

IC8

Q9

IC6

116

R113

IC4

IC1

C24

C25

C46

R51 R5

5

C36

R40

CLK

FTG

R65

R62

R76

C123

R107

C96

EYEX

YEY

ESYN

C+3

.3V/

BATI

N

EYEC

LK

R67

R66

R74

C57R72R64

R48

R104C106

C105

C60

R121+5VA

C104

C101

R108

R109

R105R106

R96

R95

R94

R90

C91

C94C95

C12221R119

C92R99

R103

L12 7

CN8

D3

C110

C109

C125

1

R60C53

C55

DG

R41R5

8R5

6C4

0R4

5R4

7

R46C32

R54

C56

R63SIG

R115

R28

136

377273

108

TEST

X1

RA9

C97

C89

R98

1613

54

IC3

J1DG

CN9

BATI

Q6

Q5

C47

PFUP

1393

ZPb

F

+2.5

V

XNMI

E

E

Q11E

E

Q7 E

RA2

RA3 RA

4

RA7

C116C115R78

R79121

R114

C59C58

R77C70

R84C72

R89R88

RA8

Q8

C62

C66

L10

R61

R59

ADR1

3AD

R14

ADR1

5

XCLK

X2

EQ

10E

E

C75

C113

C103

C78

L15

L13

C65

R81

IC9

1 458 C7

9L18

C73L1

4C1

3

L17

C80C8

2148

7 1

C84

R92

IC10

R97

Q12C12

C11

F20.25A

R10

CN1

17 R93

C10

PG

85

14Q

2

X4

KX-FT906HG-B / KX-FT908HG-B

173

Page 174: Panasonic Kx Ft906hg b 908hg b

15.1

.2.

DIG

ITA

LB

OA

RD

(PC

B1)

:B

OT

TO

MV

IEW

KX

-FT

906/

908H

G-B

: D

IGIT

AL

BO

AR

D :

BO

TTO

M V

IEW

Q3

E

C44

C35R37C39

12

34

56

78

9A

BC

DE

FG

HI

C38

C37

C33 C30R44

C15R30

R29

R33C26C20

C18

C50

C49C51

C8R21

R22

C4C6C129

C83

C77

L20

C16C34R36

C120

R17R15

R14R13R12

R102C98

R110R91

C111

C90C88

R100

C93

C71C63

C43

C48C41

C31C28

C17R5

R1R3C1

C7C5

R6

C114C27

C45

C42

R4R2

C3R8R57R43

C29L2

R9C54

C86C74

C117C76

R85

R111

R116

R117

R122R123

C124

R120C127C126

R118

C121

8 5

1 4

IC12

C112R112

R101C85

C81

C107C108

PFUP1393Z

MO

DEM3.3V

+3.3V/BATIN

+2.5V/BATIN

+2.5V

+3.3V

XTEST

RESET

PbF

KX-FT906HG-B / KX-FT908HG-B

174

Page 175: Panasonic Kx Ft906hg b 908hg b

15.2

. A

NA

LO

GB

OA

RD

(PC

B2)

15.2

.1.

AN

AL

OG

BO

AR

D:

CO

MP

ON

EN

TV

IEW

POS1

SA2

SA1

L34JJ

2

JJ3

L20

J24

J25 PC4

SW3

R52

F1

ZNR1

RLY1

T1

T2 PbF

J23

J22 J26

J27

J28

J1

J4

J3 J2

J6

J10

J14

J11

J12

CN1

116

J5

J9

J19

FLT3

1 4

85

J7

J8

J16

PFUP

1394

Z-UT

J15

J31

J17

J18

J33

J29

J32

AUTO

-CH

R83

D5 D4

R57

R85

R47

J21

J20

C30

C39

C10

C6

SW2

C62

CN3

C55

C58

C29

C15

C4

SW1

CN4

CN5

C48

T3

C50

C49

D12

D13

D6

D1

D15

D3

D14

D2

R43

EQ8

PC2

PC3

PC1

R28

R29

R68

PCB-

CH

KX

-FT

906/

908H

G-B

: A

NA

LOG

BO

AR

D :

CO

MP

ON

EN

T V

IEW

KX-FT906HG-B / KX-FT908HG-B

175

Page 176: Panasonic Kx Ft906hg b 908hg b

15.2

.2.

AN

AL

OG

BO

AR

D:

BO

TT

OM

VIE

W

C28C27

C31

AB

CD

EF

GH

I

L9

L4C7

5 8

14

L7R20

C16L6

R21

L5C20

R3C2 R6

R26

+24V

+24VA

+5V

+2.0V

GNDL2 C12

C25

Q1

R16R17

C11C24

Q10

EE

E

Q11R25

C22L3

C21R10

C8

C13

R18

R24

C19C18R23

PC4

123

4

IC3

C9R11

C17R13

L8C14R15

R44

R59 R31R53

R33

R1 R4

C76 R2

R84

C3 R9 R8 L14R60C74R61C43 4 1

85R64R56C46

L15R66

R65

C45

R49C38R45

C34R37R39

L13

L18L12C37

L10C52R63R36

R35R40R46

C51C40

R58

R34

R55

L24C65

C26

R30R32

R22L1

C1 R5

R81R38

C57

R79L23

L30

L31

L28

L29

L11

C32C41

L17C63

L22L25

R71C61

C53

R54R73

IC2

R51

R70

R27

C5R7R12R67

DA1R82

R80

L26

L27

R48

R14

C56

L32

L33

D16

PFUP1394Z-UTPbF

L21

L19

E

Q4

EQ2

EQ5

EQ3

E

Q6 E

Q7

E

Q9

16

1

PC2

D7

123

4

PC3

341

2

PC1

123

4

12

34

56

78

9

KX

-FT

906/

908H

G-B

: A

NA

LOG

BO

AR

D :

BO

TTO

M V

IEW

KX-FT906HG-B / KX-FT908HG-B

176

Page 177: Panasonic Kx Ft906hg b 908hg b

15.3

. O

PE

RA

TIO

NB

OA

RD

(PC

B3)

15.3

.1.

OP

ER

AT

ION

BO

AR

D:

CO

MP

ON

EN

TV

IEW

KX

-FT

906/

908H

G-B

: O

PE

RAT

ION

BO

AR

D :

CO

MP

ON

EN

T V

IEW

1

SW34

2

SW24

3

SW29

PLAY

SW12

J6

J7 J8

J1

RECO

RDSW

11

ERAS

ESW

17

SW36

4

SW32

5

SW22

6

SW27

7

SW31

8

SW21

9

SW26

SW35

SW33

FLAS

HM

UTE

SP-P

HONE

/MO

NITO

RRE

DIAL

/PAU

SE

SW23

SW28

SW18

0

SW25

#

SW30

J9 J10

J11

J12

J2

J16

J5

1 12CN1

J15J3J4

J13

J14

No 1

No 1

2

SW10

No 2

No 1

3

SW20

No 3

No 1

4

SW6

No 4

No 1

5

SW16

No 5

No 1

6

SW15

No 6

No 1

7SW

39

No 9

No 2

0

SW9

No 8

No 1

9

SW7

No 7

No 1

8

ONE

TO

UCH

DIAL

/ ST

ATIO

N KE

Y

CN2

110

SW8

SW42

LED1

No 1

0RECE

IVE

MO

DESW

41

CALL

ER-ID

SW2

STO

P

SW5

C13

FAX/

STAR

T/SE

TSW

3

COPY

PS1

No 2

1

SW37

No 1

1No

22

SW1

LOW

ER

SW19

UP/V

OL

+

SW14

< PR

EV

SW38

NEXT

>

SW4

DOW

N/VO

L -

NAVI

GAT

OR

SW40

HELP

12

34

56

78

9A

BC

DE

FG

HI

PCB-

CH

SW13

MEN

U

PbF

PFUP

1395

Z-UT

C5

KX-FT906HG-B / KX-FT908HG-B

177

Page 178: Panasonic Kx Ft906hg b 908hg b

15.3

.2.

OP

ER

AT

ION

BO

AR

D:

BO

TT

OM

VIE

W

KX

-FT

906/

908H

G-B

: O

PE

RAT

ION

BO

AR

D :

BO

TTO

M V

IEW

R11C22R49

C4

R24R48R46C20

IC1

2322

1211

144

34 33

C7C9C6

R45R44

C3

GND

R47C8

R53

FGR3C12C11R5

C10R4

Q1E

BLACKM

IC-M

IC+

R6R7

R8

C16 C19

R17

C15C23R51

R52

R13R15

R14

C17

R12

R10

R9C14

SW44

C18R25

R50

+5V

AG

RED

12

34

56

78

9A

BC

DE

FG

HI

PbFPFUP1395Z-UT

KX-FT906HG-B / KX-FT908HG-B

178

Page 179: Panasonic Kx Ft906hg b 908hg b

15.4

. P

OW

ER

SU

PP

LY

BO

AR

D(P

CB

4)

15.4

.1.

PO

WE

RS

UP

PL

YB

OA

RD

:C

OM

PO

NE

NT

VIE

W

SECO

NDAR

Y

PRIM

ARY

CAUT

ION

SRF1583EK

T3.15AH 250V

CN31

TH10

1

C106

ZNR1

01

L101

IC10

1

1

C109

C110

C206

C204

D202

R108

PC10

1IC

201

VR20

1Pb

FK

RA

ONL

Y W

ITH

SAM

E T

YPE

AND

RAT

ING

SO

F F

USE.

(F10

1)

R101

C101

F101

D104

D103

R103

L103

R105

D106

D105

D108

R106

T101

R107

R109R104

D102J1

J2

J3

J4

R102C102

C108

C119

C205C202

D201

R203

R202

IC202

C203C201

CN301

1 1

1 7

C105

C103 D101

D107

Q101S

DG

LN

FOR

CO

NTIN

UED

PRO

TECT

ION

AGAI

NST

RIS

K O

F F

IRE.

REP

LACE

KX

-FT

906/

908H

G-B

: P

OW

ER

SU

PP

LY B

OA

RD

:C

OM

PO

NE

NT

VIE

W

15.4

.2.

PO

WE

RS

UP

PL

YB

OA

RD

:B

OT

TO

MV

IEW

PRIMARY

SECONDARY

T3.15AH 250V 68-4

839A

F101

D104

D103

D102

D101 J1

J2

J3

J4

C202

R224D201

C102

C108

R104

R107

R109

R106

L103

D108

T101

C119

C221

C201

247CN301 1

5VG

NDG

ND

R203

R202C203

C106

D105

C123

C125

C124R127

R126

C121

R124

C105

R137

R103

R105

R128R122

R102

C103

R101

C101

ZNR101CN31

L N

TH10

1

R136

L101

R121

G DQ

101

S

R108

C205

IC20

1

R221

PC10

1

KA

R

D202

C206

C204

R222

R225

VR20

1

R223

C110

C122R129

IC10

15

8

1

C109

C126

J5

R125

D107D1

06

IC202

KX

-FT

906/

908H

G-B

: P

OW

ER

SU

PP

LY B

OA

RD

:BO

TTO

M V

IEW

KX-FT906HG-B / KX-FT908HG-B

179

Page 180: Panasonic Kx Ft906hg b 908hg b

16 FOR THE SCHEMATIC DIAGRAMSNote:

1. DC voltage measurements are taken with an oscilloscope or a tester with a ground.

2. The schematic diagrams and circuit board may be modified at any time with the development of new technology.

180

KX-FT906HG-B / KX-FT908HG-B

Page 181: Panasonic Kx Ft906hg b 908hg b

17 MEMO

181

KX-FT906HG-B / KX-FT908HG-B

Page 182: Panasonic Kx Ft906hg b 908hg b

18 SCHEMATIC DIAGRAM

18.1. DIGITAL BOARD (PCB1)

(1)

(2)

(3)

(4)

(5)(6)

(7)(8)

(9)

(10)

(11)(12)(14)

(15)(16)

(17)

(18)(19)(20)

(21)(23)

(22)

(24)

(25)

(26)

(27)

(13)

+5VD+24V

C11

Z0.1

u

( )C10

C12

Z0.1

u

+5VA

C13

6.3V

100u

+5VD+24V

DG

+5VA

IC2

1VPP

2 A16

3 A15

4 A12

5 A7

6 A6

7 A5

8 A4

9 A3

10 A2

11 A1

12 A0 13D0 14D1 15D2

16GND

17D3 18D4 19D5 20D6 21D7

22 CE

23 A10

24 OE

25 A11

26 A9

27 A8

28 A1329 A14

30 A17

31PGM

32VCC

C9

Z0.1u

1.5K

2W

R10

BR

1

Q3

Q2

12345

678

R22 4.7K

( )

C4

NC

( )C8

NC

IC81 DIR

2 A1

3 A2

4 A3

5 A4

6 A5

7 A6

8 A7

9 A8

10 GND 11B8

12B7

13B6

14B5

15B4

16B3

17B2

18B1

19G

20VCC

R21

5.6K

+24V

( )

C6

NC

+5VD

+5VD

CN4

1COM

2COM

3GND

4GND

5+5V

6TM

7STB1

8STB2

9STB3

10THCLK

11THLAT

12THDAT

CN6

11

22

R6

NC

1KR4

CN5

11

22

1KR3

4.7KR2

+5VD

4.7KR1

+5VD

( )

( )

R5

NC

0L2

CN7

1FG

2MICIN

3NC

4AG

5+5V

6RESET

7DG

8SCLK

9START

10TXD

11LATCH

12RXD

R7

270BEADL1

L6 BEAD

+5VD

R51

470

Z0.1uC29

C23Z0.1u

(

)

J1

C16Z0.1u

XRESET

R29 22K

Z0.1uC44

(

)(

)

R56

BAT

1

ADR14

+5VD

0R58

+2.5V

R52

100

C28Z0.1u

+2.5V/BATIN

Q5

RA

1 100

1 2 3 45678

Z0.1

u

C51

+2.5V+2.5V/BATIN

C32

Z0.1

u

( )

C46

Q6

( )

C37

NC

( )C47

( )C22

XTEST

RA

4 100

1 2 3 45678

X1

32.768KHz

BR3

( )R37

ADR15

R46 330K

+3.3VD

C35

J15p

+3.3VD

C34

K10

00p

Z0.1uC20

+3.3VD

C25Z0.1u

C48Z0.1u

XNMI

Z0.1

u

C41

C33

K0.

1u

D3

+3.3V/BATIN +3.3V/BATIN

R48

2.2K

R30

43K

C50Z0.1u

( )C21

+3.3VD

C26

K22

00p

C39

J12p

R40

F1.1

K

Z0.1u

C17

R47 4.7M

R354.7K

1KR57

C19

J100

pC

18

Z0.1

u

ADR13

R33

20K

+5VD

+2.5V

C30

K0.1u

R36 33

K

RA

3 100

1 2 3 45678

Z0.1uC31

R55

C40

Z0.1

u

+3.3VA

C38

Z0.1

u

C49

Z0.1u

IC31 VOUT2 VDD3 GND 4VDET

5CE

( )R45

IC1

1V

SS

A2

VD

DA

3.3

3A

IN1

4A

IN2

5A

IN3

6A

MO

N7

VS

SA

8X

32

OU

T9

X3

2IN

103

.3V

/BAT

TIN

11X

BA

CK

EN

12X

RA

MC

S13

3.3

V/B

AT

TO

UT

142

.5V

/BAT

TIN

15F

TG

16F

117

F2

/OP

18FA

/OP

19C

PC

/IP

20R

VN

/IP

21IR

DAT

XD

/IO

P8

122

IRD

AR

XD

/IO

P8

023

TX

D/I

OP

30

24R

XD

/IO

P3

125

XR

TS

/IO

P3

226

XC

TS

/IO

P3

327

VD

D2

.5V

28T

ON

E1

29T

ON

E2

30VO

L1RE

F31

VOL2

OUT

32V

OL

3IN

33X

NM

I34

FMEND0/IOP26

35V

DD

3.3

V36

VS

S

37VSS38

VDD3.3V

39

MIDAT/IOP45

40

MICLK/IOP46

41MILAT/IOP474220KOSC/IOP5643XWAIT/IOP6044XHSTRD/IOP4045XHSTWR/IOP4146XDPRBE/MUX/OP5347ADR15/OP48ADR14/OP49ADR13/OP50VDD2.5V51XOUT52XIN53VSS54VDD3.3V55XTEST56TEST157TEST258TEST359TEST460XMDMINT61XMDMCS62XRAS/IOP4263XCAS1/IOP4364XCAS2/IOP4465XRESCS2/OP7166DB367DB268DB469DB170DB571VDD3.3V72VSS

73V

SS

74VD

D3.

3V75

DB

076

DB

677

DB

778

XR

0M

CS

79X

RD

80X

WR

81A

DR

082

AD

R1

83A

DR

284

AD

R3

85A

DR

486

AD

R5

87V

SS

88V

DD

2.5

V89

AD

R6

90A

DR

791

AD

R8

92A

DR

993

AD

R1

094

AD

R1

195

AD

R1

296

RB

A0

97R

BA

198

RB

A2

99R

BA

310

0R

BA

410

1R

BA

5/O

P10

2R

BA

6/I

OP

96

103

ST

B1

104

ST

B2

105

ST

B3

106

XR

ES

ET

107

VD

D3

.3V

108

VS

S

109 VSS110 VDD3.3V111 XDRESET112 VDD5.0V113 VSS114 XRESETI115 XWDERR116 THDAT117 THCLK118 THLAT119 STBNP120 RM0/IOP00121 RM1/IOP01122 RM2/IOP02123 RM3/IOP03124 RXE/IP04125 TM0/IOP10126 VDD2.5V127 VSS128 TM1/IOP11129 TM2/IOP12130 TM3/IOP13131 TXE/IP14132 KSTART133 KLATCH134 KSCLK135 KTXD136 KRXD137 FMEMCLK/IOP24138 FMEMDI/IOP25139 ADSEL1140 VDDA2.5V141 VREFB142 VCL143 VREFT144 VSSA

C36

Z0.1

uR

32 2.2K

+3.3VD

C43

Z0.1

u

C24Z0.1u

R41

F36K

AMONC15

K1000p

R31

4.7

+3.3VD

+5VA

( )

C80

NC

( )

C83

NC

+2V

0L15

6.3V

47u

C78

0.25A

F2

12K

R88

8.2K

R89( )

C77 NC

+3.3V/BATIN

100

R44

R49

100

+3.3VD

100

R43

100R23

F1

1.25

A

Q4

R20

1.5K 1/2W

+24V

Q1

R11 0

CN3

1COM

2NB

3NA

4B

5A

+5VD

D2

BR4

IC7

1

2

3

4

5

6

7

8GND9

10

11

12

13

14

15

16

R19

820

D1

( )C

5

NC

Z0.1

u

C45

Z0.1

u

C42

Z0.1uC27

+3.3V/BATIN

100R54+5VD

4.7K

R28

K10

00p

C7

( )

R34NC

100L8

100L5

100L4

100L7

K10

00p

C1

( ) NCC2

( )Q12

( )C114 NC

TEST

1KR11

5

+3.3VD

B

A

+24V1

Z0.1u

C120

R42

100

R39

100

R38

100

R27 100

R24 100

R25 100

R26 100

R16100

R13100

R17100

R15

100

R12100

R14100

PG

PGPG

PG

IC41 NC2 A163 A144 A125 A76 A67 A58 A49 A310 A211 A112 A013 I/O114 I/O215 I/O316 GND 17I/O4

18I/O519I/O620I/O721I/O822CE1

23A10

24OE

25A11

26A9

27A8

28A13

29R/W

30CE2

31A15

32VDD

PG

100L3

RA

2 100

1 2 3 45678 R

5010

0

BEADL19

( )

C12

8

NC

BEADL20

CN1

1+5V

2DG

3PG

4PG

5+24V

6+24V

7+24V

XSTB2XSTB1

PWDN

FT

G

XTHDAT

XTHLAT

XSTB3

/MDMCS

XTHCLK

D[0]D[1]D[2]D[3]D[4]D[5]D[6]D[7]

D[0]D[1]D[2]

D[3]D[4]D[5]D[6]D[7]

A[0]A[1]A[2]A[3]A[4]A[5]A[6]A[7]A[8]A[9]A[10]A[11]A[12]RBA[0]RBA[1]RBA[2]RBA[3]RBA[4]

RB

A[5

]

THON

TONE1ENTONE2ENHSRXEN

RXERM[3]RM[2]RM[1]RM[0]

MOT_POS

A[0]A[1]A[2]A[3]A[4]A[5]A[6]A[7]

A[8]A[9]

A[10]

A[11]

RBA[3]

RBA[0]RBA[1]

RBA[2]RBA[4]

/CD

DATA

DCLK

KRXDKTXD

KSTARTKLATCHKSCLK

CIS

SE

L

CIS

LED

F1SIG

CISON

CP

C

HS

TX

MU

TE

BE

LLT

ELR

XE

NP

SH

OR

TM

DM

TX

EN

THON

RLYCUT_POS

/MD

MR

ST

SPMUTE

PCONT

PCONT

OPRESET/DR

RM[2]

RM[0]

RB

A[5

]

RB

A[3

]

A[0

]

A[2

]

A[4

]

A[6

]

A[8

]

A[1

0]

A[1

2]

RB

A[1

]

MOT_POS

CUT_POS

KSCLK

PAPER

KRXD

OPRESET

KSTART

XSTB1

XSTB2

XSTB3

XTHCLK

XTHLAT

XTHDAT

RB

A[4

]

RB

A[2

]

RB

A[0

]

A[1

1]

A[9

]

A[7

]

A[5

]

A[3

]

A[1

]

KLATCH

KTXD

MA

[1]

MA

[2]

MA

[3]

MA

[4]

MA

[0]

RM[3]

RM[1]

RXE

JAM

HOOK

TO POWER UNIT

TO THERMAL HEAD

CUTTORPOSITIONSENSOR

MOTORPOSITIONSENSOR

XWDERR

TO MOTOR

MOTOR BLOCK

THERMAL HEAD BLOCK

4M ROM1M SRAM

OPE-PANEL BLOCK

+5VD TO +3.3VD +3.3VD TO +2.5V +3.3V/BATIN TO +5VA TO +2V+2.5V/BATIN

T5

T4

T3

T2

PRINTING23~24V

STB1

STB2

STB3

LATCH5V

0V

WATCHDOG ERROR

0V (WATCH DOG ERROR OCCUR)

CLOCK

5V0V

THERMALHEAD TEMP

32.768kHz

24MHz

182

KX-FT906HG-B / KX-FT908HG-B

Page 183: Panasonic Kx Ft906hg b 908hg b

(1)

(2)

(3)

(4)

(5)(6)

(7)(8)

(9)

(10)

(11)(12)(14)

(15)(16)

(17)

(18)(19)(20)

(21)(23)(22)

(24)

(25)

(26)

(27)

(13)

FAX TX

FAX RX

KX-FT906/908HG-B : DIGITAL BOARD (PCB1)

( )

C57 NC

C55

Z0.1

u

100K

R62

R64

0

10KR76

10K

R63

( )R72

NC

+24V1

( )

C53 NC

R66

100

R67

390

2W

BR

2

R65

100

+3.3VD

CN8

1S

IG

2G

ND

3+

3.3

V

4S

I

5C

LK

6G

_L

ED

7V

_L

ED

+3.3VD

R74 10K

Q11

(

)R

60 NC K0.

1u

C56

IC6

1 A11

2 A9

3 A8

4 A135 A14

6 A17

7WE8VDD

9A18

10 A16

11 A15

12 A12

13 A7

14 A6

15 A5

16 A4

17 A3

18 A2

19 A1

20 A0 21D022D123D2

24VSS

25D326D427D528D629D7

30 CE

31 A10

32 OE

+3.3VD

Z0.1

u

C52

R59 47

R61

1M

24.00MHzX2

R10

7

1K

R10

42.

2K

0

R70

Z0.1

uC

71

+5VD

C11

3

16V

10u

R10

8

2.2K

EY

EX

Y

+5VD

R83 0

+5VA

C10

0

Z0.1

u

R11

056

0

R10

9

1K

L11

Z0.1

uC

86

C10

2

16V

10u

C68

J33p

C10

9

16V

10u

(

)R

71

6.8K

R103

( )C75

C66 D8p

C10

1K

0.1u

K0.1u

C96

( )

C63

Q10

C10

8K

0.1u

C11

1

Z0.1

u

Z0.1uC74

C81

Z0.1u

C67

Z0.1

u

C11

0

16V

10u

R11

3

22

C10

7K

0.03

3u

C10

6

Z0.1

u

L12

X3

32.256MHz

C10

3

16V

10u

EY

EC

LK

C10

4

J100

p

(

)N

C

R73

R80180

RA

710

01 2 3 4

5678

R101 100

C76Z0.1u C

93Z0

.1u

RA

810

01 2 3 4

5678

R85 0

L10

C85

Z0.1

u

( )( )

Q8

+3.3VD

( )C69

R11

110

K

R100 100

R11

2

2.7K

K10

00p

C11

2

2.2K

R99

C92 K0.

033u

C94

K0.

1u

R82 4.7K

XCLK

(

)R

75

EY

ES

YN

C

Z0.1

uC

88

C10

5

Z0.1

u

C62 D8p

C99

Z0.1

u

K0.

1u

C95

IC11 NC

1IN

+

2IN

-

3G

S

4V

Ref

5C

AP

6O

SC

1

7O

SC

2

8V

SS

9D

CLK

10

DATA

11

DR

12

CD

13

PW

DN

14

IC1

15

IC2

16

VD

D

R96

(

)

(

)

(

)

(

)(

)

R90

( )C87

IC101

2

3

4

5

6

7 VSS 8

9

10

11

12

13

14VDD

( )X4

R95

+5VA

+5VA

R91

R94

( )C89

+5VA

R102

(

)(

)

R10

5

+5VA

Z0.1uC97

( )C98

( )

( )R98

10KRA9

1 2 3 45678

( )

C91

NC

R10

6

+24V1

SIG

FTG CLK

K10

00p

C3

0

R9

120K

R8

A B

IC91

2

3

4 5

6

7

8

0

L18

36K

R93

+2V

39K

R84

K0.

1u

C82

0L1

3

K0.01u

C59

( )C61

( )C72

+2V0

L14

2.2K

R81

K0.1uC58

16K

R79

+5VA

12KR77

K0.1u

C65

J100

pC

84

47K

R69

0L1

7

330K

R92

K0.1uC60

100K

R78

C73

Z0.1

u

2.2K

R97

( )

C79

2.2K

R68

Q9

( )

C54 NC

Q7

L9

C90

Z0.1

u

K0.

1u

C11

5

330K

R11

4

K33

0p

C11

6

( )

C11

7

NC

IC5

1

SR4IN/RESERVED

2

SR3OUT/RESERVED

3E

YE

SY

NC

4E

YE

CLK

5R

XD

6S

R1IO

7N

C8

EY

EX

Y9

SR

4O

UT

10V

DD

111

RLS

D12

DC

LK

13E

N85

14G

PI0

15R

TS

16D

GN

D1

17T

XD

18S

A1C

LK

19R

S4

20R

S3

21R

S2

22R

S1

23R

S0

24Y

CLK

25IA

CLK

26IA

1C

LK

27C

TR

LS

IN_S

/NC

28R

ES

ER

VE

D/N

C29

SO

UT

_S

/NC

30S

IN_S

/NC

31F

SY

NC

_S

/NC

32IA

RE

SE

T_S

/NC

33A

GN

D1

34LI

NE

IN_S

/NC

35M

ICP

_S

/NC

36M

ICM

_S

/NC

37M

ICB

IAS

_S/N

C

38N

C

39NC40VREF_S/NC41VC_S/NC42VAA_S/NC43LINEOUT_S/NC44NC45AGND246SPKRP_S/NC47SPKRM_S/NC48AVDD_S/NC49RESERVED/NC50ICLK_S/NC51MCLK_P52CTRLSIN_P53RESERVED54SOUT_P55SIN_P56FSYNC_P57IARESET_P58AGND359NC60LINEIN_P61MICP_P62MICM_P63MICBIAS_P64NC

65N

C66

VR

EF

_P

67V

C_P

68V

AA

_P

69LIN

EO

UT

_P

70A

GN

D4

71S

PK

RP

_P

72S

PK

RM

_P

73A

VD

D_P

74N

C75

ICLK

_P

76M

CLK

_S

/NC

77V

DD

278

D7

79D

680

D5

81D

482

D3

83D

284

DG

ND

285

VD

D3

86D

187

DG

ND

388

D0

89C

SB

R90

WR

ITE

91C

S92

RE

AD

93G

PI2

94G

PI3

95G

PI4

96G

PI5

97G

PI6

98G

PI7

99G

PO7

100

VDD

410

1G

PO6

102

GPO

5

103 RESERVED104 GPO4105 GPO3106 DGND4107 CTS108 IRQ1109 GPO2110 GPO1111 GPO0112 VDD5113 VGG114 DGND5115 RESET116 XTALI117 XTALO118 RESERVED119 XCLK120 GPI1121 IRQ2122 SR3IN123 RESERVED124 RESERVED125 DGND6126 DVAA127 AGND5128 RESERVED

15KR116 10KR117

10KR118

(

)(

)

NC

R11

9

NC

R12

0

0R

121

( )

NC

C12

1

( )

NC

C12

2

50V

4.7u

C12

3

( )

C12

4

( )

NC

C12

5

IC121 CD

2 FC2

3 FC1

4 VIN 5VO1

6VCC

7GND

8VO2

K1000pC126

+5VA

CN9

1

2

K0.1uC127

CN2

1 +24V

2 DG

3 +5V

4 PAPER

5 LINETX

6 TONE1

7 RLY

8 CPC

9 JAM

10 P_SHORT

11 BELL

12 HOOK

13 LINERX

14 MONRX

15 H/STX_MUTE

16 H/SRX

C64

K47

00p

J680

pC

70

120K

R12

2

1

120K

R12

3

1

27KR124

K0.1u

C129

D4

A[10]

RBA[1]

RBA[4]

A[9]

D[3]A[2]

RBA[3]

D[0]

A[5]D[6]

A[11]

A[0]

RBA[2]

A[12]

D[7]A[7]

D[1]

A[3]

RBA[5]

A[6]

D[2]

A[8]

RBA[0]

A[1]

A[4] D[4]D[5]

D[2

]

MA

[4]

MA

[3]

D[3

]

D[0

]

MA

[2]

D[1

]

MA

[0]

D[4

]M

A[1

]D

[5]

D[7

]D

[6]

TELRXEN

TONE1EN

DC

LK

HSRXEN

/CD

MDMTXEN

PW

DN

DAT

A

/DR

CIS

LED

CIS

SE

L

/MDMRST

/MDMCS

HOOK

F1

FT

G

CIS

ON

SIG

TON

E2E

N

D[7]

D[6]

D[0]

D[5]D[1]D[4]D[2]D[3]

SPMUTE

HSTXMUTE

BELL

PSHORT

JAM

CPC

RLY

PAPER

TO CIS

4M FLASHfor VOICE

TAD MODEL ONLY

FM209 OR FM209VS

TAD MODEL ONLY

TO ANALOG

CIS BLOCK

CIS LED ARRAYON: 3.3VOFF: 0V

CIS PowerON: 0VOFF: 3.3V

32.256MHz

2.1V

183

KX-FT906HG-B / KX-FT908HG-B

Page 184: Panasonic Kx Ft906hg b 908hg b

18.2. ANALOG BOARD (PCB2)

FAX TX Signal

FAX RX Signal

+5V

+5V

+2.0V

+5V

+24V

+5V

+12V

PC1NC ( )A

KE

C

+5V

+5V

+24VA

5

67

12

34

8

+12V

+24VA +24V

+2.0V

C16

(

)N

C

C1K0.01u

C21K0.039u

C14

K3900p

C3

NC

(

)

C18 NC

(

)

K0.1u

C12

C17K0.039u

C8

J120p

C31

K0.

047u

C7

Z0.

1u

J39pC24

C28 NC

(

)

C2

K0.01u

C5

K0.01u

C27 NC

(

)

C19

K0.

068u

K0.022u

C26

C34 NC

(

)

C9( )NC

C13

D10p

C20

Z0.

1u

C25

Z0.1u

K0.047u

C11

D10

p

C22

50V

4.7u

C29

C15

16V

10u

C30

NC( )

C6

6.3V

47u C

10 NC

(

)

50V4.7u

C4

L1

11A102

L2

0

L7

11A102

L6 0

L80

L411A102

L5

0

L3

11A102

L9

0

12KR30

R33

NC( )

R12

4.7KR3

100

R27

NC (

)

R8

10K

39K

R22

R24

120K

R21

220K

R44.7K

R15

75K

0

R5

R37 NC

(

)

R40

0

R31

NC( )

R11 120K

R26

10K

R7

100

R46 NC

(

)

R9

10K

360KR25

R28

220

1/4W

R20

220K

R29 0

R23

4.7K

27K

R16

R14

0

22K

R35

R64.7K

R38 NC

(

)

R1

100

R1875K

R1375K

R10

150K

4.3K

R34

68K

R17

6.8K

R32

D3

5.6V

D2

5.6VD1 4.7V

Q1

Q6NC

( )

Q2

Q3

Q5NC

( )

Q7NC

( )

Q4NC

( )

SW2

1 234

T2

( )NC

1234

6

T1

1

234

5

CN1

1+24V

2AG

3+5V

4PAPER

5LINETX

6TONE1

7RLY

8CPC

9JAM

10P_SHORT

11BELL

12HOOK

13LINERX

14MONRX

15H/STX_MUTE

16H/SRX

SW11234

SW31234

(

) D15

NC

R2 10K

Immunity countermeasure part

IC3-1

IC3-2

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

(12)

(14)

(13)

+2V

FAX TX

+12V

JAM SWNO PAPER: 5V PAPER: 0VPEPAR SW

NO PAPER: 5VPAPER: 0V

HOOK SWON-HOOK: 5V

OFF-HOOK: 0V

2V

BELL DETECT5V0V

184

KX-FT906HG-B / KX-FT908HG-B

Page 185: Panasonic Kx Ft906hg b 908hg b

FAX TX Signal

FAX RX Signal

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

(12)

(14)

(13)

2.5V

0V5V

CPC DETECT

RLY1-1

35

4

+5V

RLY1-2

12

+24V

+5V

+5V

PC2AK

KAE

C

+2.0V

5

67

+5V

PC3NC ( )

A

KE

C

+5V

12

34

8

+2.0V+5V

CN4

1 a

2 b

CN5

1 b

2 a

C65

K0.

01u

C56

K0.01u

C52 K0.1u

C46

(

)N

C

Z0.1u

C37

250V1u

C48

C53 K0.1u

C41

J220p

C49

NC( )

C45

D10PK0.1u

C32

C61

K0.

01u

C50

NC( )

C51

K4700p

(

)

C43 NC

J100pC38

C40

K0.1u

(

)C

57 NC

C63

K0.

01u

C39 NC

(

)

C62

6.3V

47u

C55

6.3V

47u

C58

16V10u

L15

0

L120

L10

11A102

L11

0

L30 0

L24 BEAD

L29 0

L19( )

NC

L28 0

L26

21A601

21A601

21A601

L32

L22 BEAD

L130

L33

L31 0

L25 BEAD

L23 BEAD

L21( )

NC

L14 0

L170

L18

0

L27

21A601

JJ2

JJ3

R57

10K 1/2W

R70

1.5K

22

R66

R672.2K

12K

R61

R47

18K

1/2

W

R55

330

R59 NC

(

)

R63 3.3K

R44

2.2K

R52

120 2W

R512.2K

R54

300K

R56

300K

R64 3.3K36K

R36

R43 NC

(

)

R65

47K

R39

NC( )

2.2K

R45

R48

NC( )

R71

1.5K

560KR49

330

R73

R58

6.8K

R53 NC

(

)

R68

220 1/4W

D12

D6

NC( )

D14

D13

D7 NC

( )1

2 3

4

D4

0

D5

0

0

F1

POS1

SA2

3000V

SA

130

0V/3

10V

ZNR1

NC(

)

Q8NC

( )

Q9

Q10

L20

NC

( )1

2 3

4

FLT3NC 1

2

3

45

6

7

8CN3

1 HSMIC-

2 HSSP-

3 HSSP+

4 HSMIC+

0R79

K0.01u

C74

Q11

K0.1u

C76

(

)R

80 NC

10K

R81

( )R82

NC( )R83

NC

T3 NC

( )1

2 3

45

DA1 NC

( )

1A 2K

1K2A

1MR84

0

R60

PC41

23

4

L340

(

)D

16

(

)N

C

R85

IC2-2

IC2-1

KX-FT906/908HG-B : ANALOG BOARD (PCB2)

185

KX-FT906HG-B / KX-FT908HG-B

Page 186: Panasonic Kx Ft906hg b 908hg b

18.3

. O

PE

RA

TIO

NB

OA

RD

(PC

B3)

( )

SW

44

1 234

C4

Z0.1u( )

R11330

R4

560K

R8

330

+5V

0R

44

+5V

R24

00R

46

C15

Z0.1u

+5V

R15( )

NC

R14

560

( )K330p C6

C12

K0.01u

0R

48

C3

Z0.1u

R25

4.7

+5V

Q1

+5V

R5

22K

R1256K

R9

100

C18

Z0.22u

C11

K0.

1u

+5V

C16

Z0.1u

C13

6.3V47u

FG

R7

330

PS

1A K

C E

LED1

C5

6.3V220u

0R

45

C19

K0.01u

R6

6.8K

R13

27K

+5V

C9

K330p

( )C20J120p

+5V

C10

K68

0p

CN2

1DG

2+5V

3V0

4RS

5RWB

6E

7D4

8D5

9D6

10D7

R17

270

R10

4.7K

+5V

IC1

1KSL22LED63KIN14LED75XLED86XLED97KIN28KIN39XLED1010KSL311KIN4

12

KIN

51

3K

IN6

14

KIN

71

5X

LE

D1

21

6X

LE

D1

11

7V

DD

-17

18

VS

S-1

81

9X

LE

D1

32

0X

LE

D1

42

1X

LE

D1

52

2L

ED

1

23 RS24 RWB25 E26 D427 D528 D629 D730 RESET31 SCLK32 RXD33 TXD

34

LAT

CH

35

STA

RT

36

LE

D2

37

LE

D3

38

LE

D4

39

VS

S-3

94

0V

DD

-40

41

LE

D5

42

KIN

04

3K

SL

04

4K

SL

1

C14

K0.01u

R3

3.3K

C17

Z0.22u( )

+5V

SW

1

LO

WE

R

SW

2

ST

OP

SW

3

CO

PY

SW

4

DO

WN

/VO

L -

SW

5

FAX

/STA

RT

/SE

T

SW

6

No

4/

No

15

SW

7

No

7/

No

18

SW

8

No

10

/ N

o 2

1

SW

9

No

8/

No

19

SW

10

No

2/

No

13

SW

11

RE

CO

RD

SW

12

PL

AY

SW

13

ME

NU

SW

14

< P

RE

V

SW

15

No

6/

No

17

SW

16

No

5/

No

16

SW

17

ER

AS

E

SW

18

SP

-PH

ON

E/M

ON

ITO

R

SW

19

UP

/VO

L +

SW

20

No

3/

No

14

SW

21

8

SW

22

5

SW

23

RE

DIA

L/P

AU

SE

SW

24

2

SW

25

0

SW

26

9

SW

27

6

SW

28

MU

TE

SW

29

3

SW

30

#

SW

31

7

SW

32

4

SW

33

FL

AS

H

SW

34

1

SW

35

*

SW

36

No

1/

No

12

SW

37

No

11

/ N

o 2

2

SW

38

NE

XT

>

SW

39

No

9/

No

20

SW

40

HE

LP

SW

41

CA

LL

ER

-ID

SW

42

RE

CE

IVE

MO

DE

K0.01u C22

K0.01u C23

+5V 4.7K R50

4.7K R52+5V

100

R49

100

R51

MIC

+

MIC

-

CN

1

1T

xD

2L

atc

h

3R

xD

4S

tart

5S

CL

K

6D

G

7R

ese

t

8+

5V

9A

G

10

NC

11

MIC

IN

12

FG

C8

J120p

0R

47

C7

K330p

0 R53

KSL0

KSL1

KSL2

KSL4

KSL3

KS

L0

KIN0

KS

L3

KIN7

KIN6

KS

L4

KS

L2KIN5

KIN4

KIN3

KIN2

KIN1

KIN0

KIN1

KIN2KIN3

KIN4

KIN5KIN6KIN7

KS

L1K

SL1

DO

CU

ME

NT

TO

P S

W

DO

CU

ME

NT

S

ET

SW

TO L

CD

TO D

IGIT

AL

TO M

IC

KX

-FT

906/

908H

G-B

: O

PE

RA

TIO

N B

OA

RD

(P

CB

3)

0V3.

3V

+2.5

V

5V 0V

PA

PE

R 5

V 0V

NO

PA

PE

R 5

V

LC

DC

ON

TR

AS

T

PA

PE

R 0

VN

O P

AP

ER

5V

LE

D O

N :

0V

OF

F :

5V

KX-FT906HG-B / KX-FT908HG-B

186

Page 187: Panasonic Kx Ft906hg b 908hg b

18.4

. P

OW

ER

SU

PP

LY

BO

AR

D(P

CB

4)

D10

3D

104

C106

56/450

C203

470/16

C119 R106

47p 47/2

R13

622

0K

R13

722

0K

R102

390K

R103

390K

R121

10K

C108

1000P/1K

C201

470/35

R202

3.3K/2

R225VR201R224

27K 5K 3.3K

R222

R221

2.2K

2.2KPC101

D105

L103

R10

9

10

C105

2200pF

R126

82K

C122

0.22/10C123

0.01

C109

22/50

D10

2

C10

2

0.1 C

103

1000

p

L101

ZN

R10

1

R10

1

1M 1

/2

750V

LN

CN

311

GN

D

R12

7

PC

101

C12

4

0.47

/10

1.8K

C10

1

0.22

F101

T3.15A250V

D10

1

R10

5

0.22

/2

C12

1

4700

p

C12

547

0p

45

36

27

18

R12

2

270

(D10

7)(R

125)

IC10

1

D10

8R

108

15

IC20

2R128

100

D106

Q10

1

G

(R10

4)

R10

715

0K/2

T10

1T

RA

NS

D20

11

24V

224

V

324

V

4G

ND

CN

301

5G

ND

6G

ND

75V

C20

2

1000

p/1K D

202

(C20

6)

C11

0

(C221)

2200

p

R22

3

IC20

1

C20

5

1/50

100

D S

R203

471/2

C204

47/35

TH

101

R12

4

180

C126

0.1/50

Cyc

le =

15.

4 µs

-55V25

V

0V

Cyc

le =

15.

4 µs

-20V10

V

0V

Cyc

le =

15.

4 µs

-40V20

V

0V

Cyc

le =

15.

4 µs

500V

0V

KX-F

T906

/908

HG-B

: PO

WER

SUP

PLY

BOAR

D (P

CB4)

Cyc

le =

15.

4 µs

6V

0V

KX-FT906HG-B / KX-FT908HG-B

187

Page 188: Panasonic Kx Ft906hg b 908hg b

188

KX-FT906HG-B / KX-FT908HG-B

K.NKXFT906HGBKXFT908HGB