lg_lv280_v180_[ET]

CONTENTSSECTION 1 . . . . SUMMARYSECTION 2 . . . . CABINET & MAIN CHASSISSECTION 3 . . . . ELECTRICALSECTION 4 . . . . MECHANISM OF VCR PARTSECTION 5 . . . . REPLACEMENT PARTS LIST

SECTION 1SUMMARY

CONTENTS

PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS ............. 1-3SERVICING PRECAUTIONS .................................................................................................. 1-4

General Servicing Precautions Insulation Checking Prodedure Electrostatically Sensitive Devices

SERVICE INFORMATION FOR EEPROM IC SETTING(VCR)...................................... 1-5SERVICE INFORMATION FOR EEPROM (DVD).............................................................. 1-6SPECIFICATIONS ........................................................................................................................1-7

1-3

CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY,NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFAC-TURERS APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLYVOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANYRESULTING PROPERTY DAMAGE OR USER INJURY.SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARETHOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETYCHECKS AND SERVICING GUIDELINES. TO DO OTHERWISE,INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THEUSER.WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTEC-TION FROM A.C. LINE SHOCK.SAFETY CHECKSAFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRECTED. ACHECK SHOULD BE MADE OF THE FOLLOWING.SUBJECT : FIRE & SHOCK HAZARD1. BE SURE THAT ALL COMPONENTS ARE POSITIONED IN SUCH A WAY

AS TO AVOID POSSIBILITY OF ADJACENT COMPONENT SHORTS.THIS IS ESPECIALLY IMPORTANT ON THOSE MODULES WHICH ARETRANSPORTED TO AND FROM THE REPAIR SHOP.

2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVE DEVICESSUCH AS INSULATORS, BARRIERS, COVERS, SHIELDS, STRAIN RELIEFS, POWER SUPPLY CORDS, AND OTHER HARDWARE HAVEBEEN REINSTALLED PER ORIGINAL DESIGN. BE SURE THAT THESAFETY PURPOSE OF THE POLARIZED LINE PLUG HAS NOT BEENDEFEATED.

3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLE COLDSOLDER JOINTS, SOLDER SPLASHES OR SHARP SOLDER POINTS.BE CERTAIN TO REMOVE ALL LOOSE FOREIGN PARTICLES.

4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE OR DETERIORATIONTO PARTS AND COMPONENTS. FOR FRAYED LEADS, DAMAGEDINSULATION (INCLUDING A.C. CORD). AND REPLACE IF NECESSARYFOLLOW ORIGINAL LAYOUT, LEAD LENGTH AND DRESS.

5. NO LEAD OR COMPONENT SHOULD TOUCH A RECIVING TUBE ORA RESISTOR RATED AT 1 WATT OR MORE. LEAD TENSION AROUNDPROTRUNING METAL SURFACES MUST BE AVOIDED.

6. ALL CRITICAL COMPONENTS SUCH AS FUSES, FLAMEPROOFRESISTORS, CAPACITORS, ETC. MUST BE REPLACED WITH EXACTFACTORY TYPES, DO NOT USE REPLACEMENT COMPONENTSOTHER THAN THOSE SPECIFIED OR MAKE UNRECOMMENDED CIR-CUIT MODIFICATIONS.

7. AFTER RE-ASSEMBLY OF THE SET ALWAYS PERFORM AN A.C.LEAKAGE TEST ON ALL EXPOSED METALLIC PARTS OF THE CABI-NET, (THE CHANNEL SELECTOR KNOB, ANTENNA TERMINALS. HAN-DLE AND SCREWS) TO BE SURE THE SET IS SAFE TO OPERATEWITHOUT DANGER OF ELECTRICAL SHOCK. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST USE AN A.C. VOLT-METER, HAVING 5000 OHMS PER VOLT OR MORE SENSITIVITY, INTHE FOLLOWING MANNER; CONNECT A 1500 OHM 10 WATT RESIS-TOR, PARALLELED BY A .15 MFD. 150.V A.C TYPE CAPACITORBETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, CON-DUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME.MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUGAND REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE MEASURED MUST NOT EXCEED 75VOLTS R.M.S. THIS CORRESPONDS TO 0.5 MILLIAMP A.C ANYVALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCKHAZARD AND MUST BE CORRECTED IMMEDIATELY.

SUBJECT: GRAPHIC SYMBOLSTHE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHINAN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THESERVICE PERSONNEL TO THE PRESENCE OF UNINSULATEDDANGEROUS VOLTAGE THAT MAY BE OF SUFFICIENT MAG-NITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIAN-GLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TOTHE PRESENCE OF IMPORTANT SAFETY INFORMATION INSERVICE LITERATURE.

SUBJECT : X-RADIATION1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PER-

SONNEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTEN-TIAL SOURCE OF X-RAYS IN CURRENT T.V. RECEIVERS IS THE PIC-TURE TUBE. HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHENTHE HIGH VOLTAGE IS AT THE FACTORY SPECIFIED LEVEL. THE PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC. OPERA-TION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PIC-TURE TUBE OR HIGH VOLTAGE SUPPLY AND, UNDER CERTAIN CIR-CUMSTANCES, MAY PRODUCE RADIATION IN EXCESS OF DESIR-ABLE LEVELS.

2. ONLY FACTORY SPECIFIED C.R.T. ANODE CONNECTORS MUST BEUSED. DEGAUSSING SHIELDS ALSO SERVE AS X-RAY SHIELD INCOLOR SETS, ALWAYS RE-INSTALL THEM.

3. IT IS ESSNTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE ANACCURATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRATION OF THE METER SHOULD BE CHECKED PERIODICALLYAGAINST A REFERENCE STANDARD, SUCH AS THE ONE AVAILABLEAT YOUR DISTRIBUTOR.

4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLYTHERE IS NO POSSIBILITY OF AN X-RADIATION PROBLEM. EVERYTIME A COLOR CHASSIS IS SERVICED. THE BRIGHTNESS SHOULDBE RUN UP AND DOWN WHILE MONITORING THE HIGH VOLTAGEWITH A METER TO BE CERTAIN THAT THE HIGH VOLTAGE DOESNOT EXCEED THE SPECIFIED VALUE AND THAT IT IS REGULATINGCORRECTLY, WE SUGGEST THAT YOU AND YOUR SERVICE ORGA-NIZATION REVIEW TEST PROCEDURES SO THAT VOLTAGE REGU-LATION IS ALWAYS CHECKED AS A STANDARD SERVICING PROCE-DURE. AND THAT THE HIGH VOLTAGE READING BE RECORDER ONEACH CUSTOMERS INVOICE.

5. WHEN TROUBLESHOOTING AND MAKING TEST MEASUREMENTS INA PRODUCT WITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE,AVOID BEING UNNECESSARILY CLOSE TO THE PICTURE TUBE ANDTHE HIGH VOLTAGE SUPPLY. DO NOT OPERATE THE PRODUCTLONGER THAN IS NECESSARY TO LOCATE THE CAUSE OF EXCESSIVE VOLTAGE.

6. REFER TO HV. B+ AND SHUTDOWN ADJUSTMENT PROCEDURES DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS(WHERE USED).

SUBJECT: IMPLOSION1. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTE

GRAL IMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BETAKEN TO AVOID DAMAGE DURING INSTALLATION, AVOIDSCRATCHING THE TUBE. IF SCRATCHED REPLACE IT.

2. USE ONLY RECOMMENDED FACTORY REPLACEMENT TUBES.SUBJECT : TIPS ON PROPER INSTALLATION1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBY-

HOLE OR CLOSELY FITTING SHELF SPACE. OVER OR CLOSE TOHEAT DUCT, OR IN THE PATH OF HEATED AIR FLOW.

2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIOINSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIA-TORS WHERE STEAM LEAKAGE IS A FACTOR, ETC.

3. AVOID PALCEMENT WHERE DRAPERIES MAY OBSTRUCT REARVENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DEC-ORATIVE SCARVES OR OTHER COVERINGS WHICH MIGHTOBSTRUCT VENTILATION.

4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMER-CIAL MOUNTING KIT. MUST FOLLOW THE FACTORY APPROVED MOUNTING INSTRUCTIONS A PRODUCT MOUNTED TO A SHELF ORPLATFORM MUST RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENTTHICKNESS IN SPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSS THE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERSMUST NOT TOUCH ANY PARTS OR WIRING. PERFORM LEAKAGETEST ON CUSTOMIZED INSTALLATIONS.

5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A PRODUCT ONSLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT ISPROPERLY SECURED.

6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITSMOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZ-ARDS OF TRYING TO ROLL A CART WITH SMALL CASTERS ACROSSTHRESHOLDS OR DEEP PILE CARPETS.

7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STANDWHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES, INC. FOR USE WITH THEIR SPECIFIC MODEL OF TELEVISION RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V.S OFTHE SAME OR LARGER SCREEN SIZE.

8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS, EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SIN-GLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TOHOME AND FAMILY.

PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS

A.C. VOLTMETER

GOOD EARTH GROUNDSUCH AS THE WATERPIPE. CONDUIT. ETC

PLACE THIS PROBEON EACH EXPOSEDMETAL PART

1-4

SERVICING PRECAUTIONSCAUTION : Before servicing the VCR+DVD covered by thisservice data and its supplements and addends, read and fol-low the SAFETY PRECAUTIONS. NOTE : if unforeseen cir-cumstances create conflict between the following servicingprecautions and any of the safety precautions in this publi-cations, always follow the safety precautions.Remembers Safety First:

General Servicing Precautions1. Always unplug the VCR+DVD AC power cord from the AC

power source before:(1) Removing or reinstalling any component, circuit board,

module, or any other assembly.(2) Disconnection or reconnecting any internal electrical

plug or other electrical connection.(3) Connecting a test substitute in parallel with an elec-

trolytic capacitor.Caution : A wrong part substitution or incorrect polarity installation of electrolytic capacitors may resultin an explosion hazard.

2. Do not spray chemicals on or near this VCR+DVD or anyof its assemblies.

3. Unless specified otherwise in this service data, cleanelectrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner,cotton-tipped swab, or comparable soft applicator.Unless specified otherwise in this service data, lubricationof contacts is not required.

4. Do not defeat any plug/socket B+ voltage interlocks withwhitch instruments covered by this service manual mightbe equipped.

5. Do not apply AC power to this VCR+DVD and/or any of itselectrical assemblies unless all solid-state device heatsinks are cerrectly installed.

6. Always connect test instrument ground lead to theappropriate ground before connection the test instrumentpositive lead. Always remove the test instrument ground lead last.

Insulation Checking ProcedureDisconnect the attachment plug from the AC outlet and turnthe power on. Connect an insulation resistance meter(500V)to the blades of the attachment plug. The insulation resis-tance between each blade of the attachment plug and acces-sible conductive parts (Note 1) should be more than 1M-ohm.Note 1 : Accessible Conductive Parts including Metal pan-els, Input terminals, Earphone jacks, etc.

Electrostatically Sensitive (ES) DevicesSome semiconductor (solid state) devices can be damagedeasily by static electricity. Such components commonly arecalled Electrostatically Sensitive (ES) Devices. Examples oftypical ES devices are integrated circuits and some fieldeffect transistors and semiconductor chip components.The following techniques should be used to help reduce theincidence of component damage caused by static electricity.

1. Immediately before handling any semiconductor compo-nent or semiconductor-equipped assembly, drain off anyelectrostatic charge on your body by touching a knownearth ground. Alternatively, obtain and wear a commer-cially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grouned-tip soldering iron to solder or unsolderES devices.

4. Use only an anti-static solder removal device. Somesolder removal devices not classified a anti-static cangenerate electrical charges sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These cangenerate electrical charge sufficient to damage ESdevices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready toinstall it. (Most replacement ES devices are packaged withleads electrically shorted together by conductive foam,aluminum foil, or comparable conductive material).

7. Immediately before removing the protective material fromthe leads of a replacement ES device, touch the protectivematerial to the chassis or circuit assembly into which thedevice will be installed.

Caution : Be sure no power is applied to the chassis orcircuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Normally harmless motion such as the brushing together of your clothes fabric or the liftingof your foot from a carpeted floor can generate static elec-tricity sufficient to damage an ES device.)

1-7

SPECIFICATIONS GENERAL

Power requirements AC 200-240V, 50/60 HzPower consumption 17W Dimensions (approx.) 430 x 78.5 x 265 mm (W x H x D)Mass (approx.) 4.2 kgOperating temperature 5C to 35C (41F to 95F)Operating humidity 5 % to 90 %Timer 24 hours display typeRF Modulator UHF 22 - 68 (Adjustable)

SYSTEM

Laser Semiconductor laser, wavelength 650 nmVideo Head system Double azimuth 6 heads, helical scanning.Signal system PALFrequency response DVD (PCM 96 kHz): 8 Hz to 44 kHz

DVD (PCM 48 kHz): 8 Hz to 22 kHzCD: 8 Hz to 20 kHz

Signal-to-noise ratio More than 100dB (ANALOG OUT connectors only)Harmonic distortion Less than 0.008%Dynamic range More than 100 dB (DVD)

More than 95 dB (CD)

INPUTS (VCR)Audio -6.0dBm, more than 10 kohms (SCART)

-6.0dBm, more than 47 kohms (RCA)Video 1.0 Vp-p, 75 ohms, unbalanced (SCART/RCA)

OUTPUTS (DVD)VIDEO OUT 1 Vp-p 75 ohms, sync negativeCOMPONENT VIDEO OUT (Y) 1.0 V (p-p), 75 , negative sync, RCA jack x 1(Progressive Scan) (Pb)/(Pr) 0.7 V (p-p), 75 , RCA jack x 2RGB output 0.7 Vp-p, 75 ohmsAudio output (coaxial audio) 0.5 V (p-p), 75 , RCA jack x 1Audio output (analog audio) 2.0 Vrms (1 KHz, 0 dB), 600 ,

RCA jack (L, R)x2/SCART (TO TV)

OUTPUTS (VCR)Audio -6.0dBm, less than 1 kohms (SCART)Video 1.0Vp-p, 75 ohms, unbalanced (SCART)RGB output 0.7 Vp-p, 75 ohms

*Design and specifications are subject to change without notice.

2-1

SECTION 2CABINET & MAIN CHASSIS

CONTENTS

EXPLODED VIEWS .....................................................................................................................2-21. Cabinet and Main Frame Section ...........................................................................................2-22. Deck Mechanism Section [ DVD MD (DP-10C) ] ...................................................................2-33. DECK Mechanism Section [ VCR DECK D37(N) ].................................................................2-3

1) Front Loading Mechanism Section ..................................................................................2-32) Moving Mechanism Section (1)..........................................................................................2-43) Moving Mechanism Section (2)..........................................................................................2-5

4. Packing Accessory Section....................................................................................................2-6

2-2

EXPLODED VIEWS1. CABINET AND MAIN FRAME SECTION

280 A

43

A44

A26

A00

A46

A47

A50

285

284

271

265

463

330

261

261

260

452

452

452

261

465

272

273

463

463

463

463

469

274

3002

50

471

469

469

288

323

324

322

470

457

286

NOTES) THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICELITERATURE.

A

5

4

3

2

1

B C D

283

CN

501

2-3

2. DECK MECHANISM SECTION [ DVD MD (DP-10C) ]

015A

012A

012A

015B

A26

A02439

018

013

017

014

001

002

003

A01

020

435

015

019

012

432

030

024

025

036

A03

430

021

439431

435

010

012

026

440

016

2-4

3. DECK MECHANISM SECTION [ VCR DECK D37(N) ]1) FRONT LOADING MECHANISM SECTION

054A

100

A21

106

107

102

105

103

110

112

113

114

A23

109

032

A24

115

116

A22

054

2-5

3. DECK MECHANISM SECTION [ VCR DECK D37(N) ]2) MOVING MECHANISM SECTION (1)

A01

008

006

004

013

409

016

003

022

012

011

017

031

079

032

024

406

405

028

021

031

007

A03

014

015

026 0

27

009

029

2-6

3. DECK MECHANISM SECTION [ VCR DECK D37(N) ]3) MOVING MECHANISM SECTION (2)

052A

051

052 5

17

064

067

A11

066

068

A12

069 07

0

023

078

032

076

077

058

080

410

055

518 06

0

065

061

056

2-7

4. PACKING ACCESSORY SECTION

BATTERY808

BAG804

PACKING, CASING803

806

INSTRUCTION ASSEMBLY

RF CABLE810 CABLE ASS'Y RF

801

REMOTE CONTROLLERASSEMBLY900

BOX802

PACKING, CASING803

811

812

PLUG ASS'Y 1WAY

PLUG ASS'Y 2WAY

OPTIONAL PARTS

3-13-1

SECTION 3ELECTRICAL

CONTENTSVCR PART

ELECTRICAL ADJUSTMENTPROCEDURES..................................................3-2ELECTRICALTROUBLESHOOTING GUIDE......................3-3

1. POWER(SMPS) CIRCUIT .............................3-62. SYSTEM/KEY CIRCUIT ................................3-73. SERVO CIRCUIT ...........................................3-84. Y/C CIRCUIT................................................3-105. HI-FI CIRCUIT..............................................3-146 TUNER/IF CIRCUIT ......................................3-17

BLOCK DIAGRAMS......................................3-191. POWER (SMPS) BLOCK DIAGRAM..........3-192. TU/IF, NICAM & A2 BLOCK DIAGRAM .....3-213. VPS BLOCK DIAGRAM..............................3-224. Y/C BLOCK DIAGRAM ...............................3-235. Hi-Fi BLOCK DIAGRAM .............................3-256. SYSTEM BLOCK DIAGRAM ......................3-27

CIRCUIT DIAGRAMS....................................3-291. POWER (SMPS) CIRCUIT DIAGRAM ........3-292. TU/IF CIRCUIT DIAGRAM ..........................3-313. A/V CIRCUIT DIAGRAM .............................3-334. Hi-Fi CIRCUIT DIAGRAM ...........................3-355. SCART(JACK) CIRCUIT DIAGRAM...........3-376. SYSTEM CIRCUIT DIAGRAM.....................3-39 WAVEFORMS................................................3-41 CIRCUIT VOLTAGE CHART.........................3-43

PRINTED CIRCUIT DIAGRAMS ...............3-491. MAIN P.C.BOARD (TOP SIDE) ...................3-492. MAIN P.C.BOARD (BOTTOM SIDE)...........3-513. POWER P.C.BOARD...................................3-534. KEY P.C.BOARD .........................................3-53

DVD PART

ELECTRICAL TROUBLESHOOTING GUIDE.................................................................3-55

1. POWER OPERATION FLOW......................3-552. SYSTEM TEST FLOW.................................3-563. TEST & DEBUG FLOW...............................3-57

DETAILS AND WAVEFORMS ON SYSTEMTEST AND DEBUGGING.............................3-63

1. SYSTEM 27MHZ CLOCK, RESET, FLASH R/W SIGNAL...................................3-63

2. SDRAM CLOCK ..........................................3-643. TRAY OPEN/CLOSE SIGNAL.....................3-644. SLED CONTROL RELATED SIGNAL

(NO DISC CONDITION)...............................3-665. LENS CONTROL RELATED SIGNAL

(NO DISC CONDITION)...............................3-666. LASER POWER CONTROL RELATED

SIGNAL(NO DISC CONDITION) .................3-677. DISC TYPE JUDGEMENT WAVEFORM ....3-678. FOCUS ON WAVEFORM ............................3-699. SPINDLE CONTROL WAVEFORM

(NO DISC CONDITION)...............................3-7010. TRACKING CONTROL RELATED

SIGNAL(SYSTEM CHECKING) ................3-7111. ZR36868 AUDIO OPTICAL AND COAXIAL

OUTPUT(SPDIF)........................................3-7212. ZR36868 VIDEO OUTPUT WAVEFORM ..3-7213. ZR36868 AUDIO OUTPUT TO

AUDIO DAC...............................................3-7314. AUDIO OUTPUT FROM AUDIO DAC.......3-74

BLOCK DIAGRAMS ......................................3-761. SYSTEM BLOCK DIAGRAM ......................3-76 2. SERVO BLOCK DIAGRAM.........................3-77 3. AUDIO & VIDEO IN/OUT

BLOCK DIAGRAM ......................................3-78

CIRCUIT DIAGRAMS ....................................3-791. SYSTEM CIRCUIT DIAGRAM.....................3-792. SERVO CIRCUIT DIAGRAM.......................3-813. AV/JACK CIRCUIT DIAGRAM....................3-83

3-2

ELECTRICAL ADJUSTMENT PROCEDURES1. Servo Adjustment

1) PG Adjustment Test Equipment

Adjustment And Specification

a) OSCILLOSCOPEb) NTSC MODEL : NTSC SP TEST TAPE

C) PAL MODEL : PAL SP TEST TAPE

MODE

PLAY

Adjustment Procedurea) Insert the SP Test Tape and play.

Note - Adjust the distance of X, pressing the Tracking(+) or Tracking(-) when the ATR is blink after theSP Test Tape is inserted.

b) Connect the CH1 of the oscilloscope to the H/SW(TP) and CH2 to the Video Out for the VCR.c) Trigger the mixed Combo Video Signal of CH2 to the CH1 H/SW(TP), and then check the distance (time

difference), which is from the selected A(B) Head point of the H/SW(TP) signal to the starting point ofthe vertical synchronized signal, to 6.5H 0.5H (412s, 1H=63s).

PG Adjustment Methoda-1) Payback the SP standard tapeb-2) Press the OK key on the Remote controller and the PLAY key on the Front Panel the same time

for more than 5seconds, then it goes in to Tracking initial mode. c-3) Repeat the above step(No.b-2), then it finishes the PG adjusting automatically.d-4) Stop the playback, then it goes out to PG adjusting mode after mony the PG data. CONNECTION

WAVEFORM

V.OutH/SW(TP) R/C TRK JIG KEY 6.5 0.5H

MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION

V.Out

H/SW(TP)

OSCILLOSCOPE

CH1 CH2

V.out

R/C KEY

H/SW(TP)

H/SW

CompositeVIDEO

6.5H(416us)

VCR PART

3-3

ELECTRICAL TROUBLESHOOTING GUIDE

NO Check or Replacethe D102

Replace the D123

Replace the D124

Replace the D121

YES

YES

Is the D121Normal?

Power Line of MainPCB is short

1. Power(SMPS) CIRCUIT

No 5.3VA

Replace the FR101(Use the same ICW)

Is the FR101Normal?

Is the R101Normal?

Is the BD101Normal?

NO

NO

NO

NO

NO

NO

NO

NO

NO

Replace theBD101

Replace the R101

Is the D102 normal?

Replace the D125

Replace the IC103

YES

YES

YES

YES

YES

YES

YES

Is Vcc (9V - 18V) sup-plied to IC101 Pin2?

Are the D125 normal?

Is there about 2.5Vat the IC103 Pin1?

Is the D123 normal?

Is the D124Normal?

(1) No 5.3VA

3-4

No 33V

Is the Vcc(33V) sup-plied to Q161 Emittor?

Check or Replacethe D121

Is the Q162 BaseH?

Check the PWR CTLH signal from -com

Check or Replacethe Q161

YES

YES

YES

(5) No 33V

No 5.0V_D


Is the Vcc(5.3V) sup-plied to Q165 Emittor?


Is the Q162 BaseH?

NO

NO Check the PWR CTLH signal from -com

YES

YES

YES

(2) No 5.0V_D

No 5.0V_T


Check the PWR CTLH signal from -com

Is the Vcc(5.3V) sup-plied to Q163 Emittor?

Is the Q162 BaseH?


NO

NO

YES

YES

YES

(3) No 5.0V_T

No 3.8V


Is the D123 normal?

Power line of MainPCB is short

NO NO

NO

YES

YES

(4) No 3.8V

3-5

No Motor_Vcc


Is the Vcc(14V)supplied to C134?

Check or Replacethe Cap / Drum

NO

YES

YES

(6) No Motor_Vcc (To Cap, Drum Motor )

No REG 12V

Is the Vcc(14V) suppliedto Q165 Collector?

YES

Is the Vcc(14V) sup-plied to Q165 Base?

YES


YES

(7) No REG 12V


NO

NO Check the PWR CTLH signal from -com

3-6

2. SYSTEM/KEY CIRCUIT(1) AUTO STOP

(2) The unstable loading of a Cassette tape

Auto Stop

Does the SW25 waveformappear at the IC501Pin23?

Do the T-UP Reel Pulsesappear at the IC501 Pin3?

Is 12V applied to thePMC01 Pin8?

Check the Drum Motorsignal.

Does 5.0V appear at theRS501?

Check the Power Circuit.

Check the Power.

Is 5.0V applied to theR544 ?

Refer to SMPS 5.3VAtroubleshooting.

Check the IC501Pins 86, 87, 88, 89.

Do T/UP Reel Pulsesappear at the Q514 Baseterminal?

Replace the T/UP Reel Sensor (RS501).

Check the CST SW andthe peripheral circuitry.

Replace the IC501.

The unstable loading of aCassette tape

Does the H signal appearat the IC501 Pin32 duringinserting the CST ?

Does the L signal appearat the IC501 Pin19 duringinserting the CST?

Check the DeckMechanism.

Caution : Auto stop can occur because Grease or Oil is dried up

YES

YES

YES NO

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO NO

YES

YES YES

3-7

3. SERVO CIRCUIT(1) Unstable Video in PB MODE

Unstable Video inPB Mode.

Does the Noise level of thescreen changeperiodically?

Replace the IC501.

Refer to When the Y signaldoesnt appear on thescreen in PB Mode.

Does the CFG waveformappear at the IC501Pin67?

On tracking do the CTLpulses move?

Does the Video Envelopewaveform appear at theIC501 Pin82?

Replace the IC501.

YES

YES

YES

YES

YES

NO

NO

(2) When the Drum Motor(2) doesnt run. Do the DFG Pulses appear

at the PMC01 Pin11?

Replace the Cap M.

Arent the foil patterns andthe Components betweenIC501 Pin 104 and PMC01Pin11 short?

Replace the IC501.

Refer to (2)No 12VA of Power section

Do the Drum PWM Pulsesappear at the IC501Pin34?

Arent the foil patterns andthe Components betweenIC501 Pin34 and PMC01Pin12 short?

Do the DFG Pulses appearat the IC501 Pin104?

Do the Drum PWM Pulsesappear at the IC501Pin34?

Arent the connecting patterns and the Componentsbetween IC501 Pin34 and PMC01 Pin12 short?

When the Drum Motordoesnt run,

Does 12V appear at thePMC01 Pin8?

Does 2.8V appear at thePMC01 Pin12?

Check the connector(PMC01) and the Drum Motor Assy.

NOYES

YES

YES

NO

NO

NO

NO

NO

YES

YES

YES

3-8

Does the CFG signal appear at thePMC01 Pin1?

Does the PWM signal appear at theIC501 Pin33?

Does 2.8V appear at the PMC01?

Check the PMC01 and the CapstanMotor Assy.

Does the Capstan PWM signal appear atthe IC501 Pin33?

Arent the foil patterns and Componentsbetween IC501 Pin33 and PMC01Pin9 short?

Does the CFG signal come into theIC501 Pin67?

Arent the foil patterns and Componentsbetween IC501 Pin33 and PMC01Pin9 short?

2. SERVO CIRCUIT(3) When the Capstan Motor doesnt run,

NO

NO

NO

YES

YES

YES

When the Capstan Motor doesnt run,

Does 12VA appear at the PMC01?

YES

Replace the IC501.

YES

NO

NO

YES

Refer to SMPS(CAPSTAN/12Volt)Trouble Shooting.

Arent the foil patterns and componentbetween IC501 Pin67 and PMC01Pin1 short?

Check the Capstan Motor Assy.

NO

3-9

KEY doesnt working.

Is 5V applied to the IC501Pin36?

Does LED or FLD changewhen a function button ispressed?

Refer to SMPS 5.3VATrouble Shooting.

Replace the defective switches.

YES

NO

NO

2. SERVO CIRCUIT(4) KEY doesnt working

3-10

4. Y/C CIRCUIT(1) No Video in EE Mode,

No Video in EE Mode

Check the 19Pin of Tuner.Does the Video signalappear at the IC301 Pin48?

Is 5V applied to the IC301Pins18, 24, 42, 55, 72, 91?

Does the Video signalappear at the IC301 Pin65?

Does the Video signalappear at the IC501 Pin47?

Does the Video signal appearat the Emitter terminal of theQ309?

Check the 5.0VT, 5.3VALine. (Power Circuit)

Is I2C BUS signal applied tothe IC301 Pins68, 69?

Check C316. (AGC)Chck the path of the signalbetween the IC301 Pin65and IC501 Pin49.

Replace the IC301.Does the 12VT, 5.3VAappear at the Emitter terminal of the Q309.

Replace the Q309. Check the 12VT, 5.4VALine. (Power Circuit)

Check the System Circuit.(Refer to SYSTEM I2C BUSCHECK Trouble Shooting)

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

3-11

3. Y/C CIRCUIT(2) When the Y(Luminance) signal doesnt appear on the screen in PB Mode,

Is 5.0VT, 5.3VA applied to theIC301 Pins24, 42, 55, 72, 91?

Is the I2C Bus siganl applied to the IC301 Pins68, 69 ?

Does the normal RF signalappear at the IC301 Pin78?

Check the line of the 5.0VT,5.3VA Line. (Power Circuit)

Check the System Circuit.(IC501 Pin23)

Check the V.H.S/W level.(Check R303, R304)

Replace the IC301.

Refer to SYSTEM I2C BUSCHECK Trouble Shooting.

Is the V.H.S/W signalapplied to the IC301 Pin70?

Is V.H.S/W H about 3.4Vat the IC301 Pin70?

Clean the Drum.

Check the path of theY(Luminance) RF signal.(Check C327)

Check the path of the Y(Luminance) RF signal.(Check the C312)

Does the Y(Luminance) RFsignal appear at the IC301Pin79?

Is the Y(Luminance) Videowaveform showed up attheIC301 Pin43?

Replace the IC301.

NO

NO

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YESYES

YES

YES

3-12

3. Y/C CIRCUIT(3) When the C(Color) signal doesnt appear on the screen in PB Mode,

Is 5.0VT/5.3VA applied to theIC301 Pins24, 42, 55, 72, 91.

Is the Color Rotary signal applied to the IC301Pin70?

Check the line of the 5.0VT/5.3VA Line. (Power Circuit)

Replace the X301.

Check the Color Pass.

Check the Color RotaryCircuit. (IC501 Pin98 )

Check the Color Rotarylevel. (Check the R303)

Does the X301(4.43MHZ)oscillate?

Replace the IC301.

Does the Color signalappear at the IC301 Pin21?

Is Color Rotary Habout 3.4V?

Replace the IC301.

NO

NO

NO

YES

YES

YES

YES

NO NO

NO

YES

Does the Color signalappear at the IC301Pin25 ?

3-13

3. Y/C CIRCUIT(4) When the Video signal doesnt appear on the screen in REC Mode,

Is the EE signal normal?

Is 5.0VT/5.3VA applied to theIC301 Pins24,42,55,72,91?

Does the RF signal appearat the IC301 Pin78?

Check EE Mode.

Check the System of RECH. (the IC501 Pin27 / the D301)

Replace the IC301.

Check the line of the 5.0VT/5.3VA Line.(Power Circuit)

Check PB Mode.

Is the REC H signal(about 4V) applied to theIC301 Pin80?

Check the circuit of the IC301 Pins85, 86.

Check REC LuminancePass & Color Pass.

Does PB Mdoe operatenormally?

Does the REC RF signalappear at the IC301Pins88,89,94,95?

Check the Drum &Drum Connector

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

YES

YES

YES

3-14

5. Hi-Fi CIRCUIT(A) No Sound(EE Mode)

YES

No Sound.

Check the TU Audio of IC801Pins2, 3.

Check the DVD Audio of IC801Pins4, 5.

Check the AV1 Audio of IC801Pins6, 7.



Check the Vcc of IC801 Pins34, 40,IC802 Pin13.

YES

Check the IIC Clock and DATA atIC801 Pins42, 43.

YES

Check the Audio of IC801 Pins16, 17.

YES


YES

Check the JK902, SC901.

Check the IC751 Pins30, 31.NO

Check the DVD Audio OUT.(JK902 DVD_A_L_L/R).

NO

Check the Scart1 Jack.(SC901 Scart1 Audio in Pins2, 6).

NO

NO

Check the front Jack.

Check the Scart2 Jack.(SC901 Scart2 Audio in Pins2, 6).

NO

Check the Power 5.0V, 12VT.YESNO

Check the IC501 Pins17, 18.NO

Replace IC801.

Replace IC802.

NO

NO

3-15

3. Y/C CIRCUIT(B) Hi-Fi Playback

YES

YES

YES

YES

PB mode

No Sound.

Check the Vcc of IC801(Pins34, 40)

Check the Hi-Fi Selection switch.(IC801 Pin41) and the Tape quality.

Is the RF Envelope atIC801 Pin44 over 2Vp-p?

YES

Check IC801 Pin42(Data),Pin43(Clock)

YES

Do Audio Signals appear atIC801 Pin16(L-CH), 17(R-CH)?

YES

Do Audio Signals appear atIC802 Pin10(L-CH), 16(R-CH)?

YES

YES YES

Do Audio Signals appear atIC802 Pins11, 16?

Do Audio Signals appear atJK902?

Check Power 5.0V, 12VT.NO

Check IC501 Pin26(A.H/SW)

NO

NO

Check the parts of -COM(IC501 Pins17, 18)

NO

Check the Connection atP3D01 Pins7, 9.

NO

Check the A.IN line ofIC802(C850, C852)

NO

Check the Vcc of IC802Pin13.

Replace IC802.

Check the Jack(JK902)

NO

NO

Check Power.NO

3-16

(C)

Hi-Fi REC.

It cant be recorded Hi-Fi Audiosignal.

Check Vcc of IC801.(Pins34, 40)

YES

YES

Check IC801 Pin42(Data), Pin43(CLOCK).

YES

Do Audio signals appear at IC801Pins16, 17?

YES

Do FM Audio signals appear at IC801Pin36?

YES

Check the Contact Point of DrumConnector if good then Replace the Drum.

YES

Check Power 5V, 12V.NO

Check ports of -COM.(IC501 pins 17, 18)

Check Audio input signal of IC801Pins2, 3(TU.A.), 4, 5(DVD.A.),6, 7(AVI.A.), 8, 9(AV2.A.), 10, 11(AV3.A.).

NO

Replace IC801.NO

NO

3-17

6. Tuner/IF CIRCUIT(A) No Picture on the TV screen

No picture on the TVscreen

Does the Video signal atthe TU701 Pin19.

YES

YES YES

Is 33VT applied to TU701Pin17?

YES

Is 5VT applied to TU701Pin4?

NO

Does Sync appear atIC501 Pin111.

NO

Does the Video signal atthe IC501 Pin47.

YES

NO

Does the Video signal atthe IC301 Pin61.

YES

NO

NODoes the Video signal atthe IC903 Pin6.

Check the signal flow from IC903Pins26, 27 to SC901 Pin19.

YES

YES

Check 33V line.NO

Check 5V line.NO

YES

Does the Clock signalappear at TU701 Pin12?

Check the lIC Clock Signalof -COM Pin18.

NO

YES

Does the data signalappear at TU701 Pin13?

Replace Tuner.

Check the signal flow fromTU701 Pin19 to IC301 Pin48.

Check the signal from IC301Pin65 to IC501 Pin49.



Check the lIC Data Signalof -COM Pin17.

NO

3-18

(B) No Sound

No Sound.

Check the Vcc of IC751 Pins1, 11, 19,22, 33.

YES

Check 5.0V Line.NO

Check the Tuner SiF signal at IC751Pin2.

YES

Check the oscillator of IC751 Pins5, 6.

YES


YES


YES


YES


YES

Check the Signal flow from IC802Pins3, 5, SC901 Pins1, 3.

YES

Check the Tuner SIF of TU701 Pin22.NO

Replace X751NO

Check the IIC Clock and Data at IC751Pins12, 13.

NO

Check the signal flow from IC751Pins30, 31 to IC801 Pins2, 3.

NO

Check the IIC Clock and Data at IC801Pins42, 43.

NO

Check the signal flow from IC801Pins16, 17 to IC802 Pins11, 16.

NO

3-19 3-20

BLOCK DIAGRAMS1. POWER(SMPS) BLOCK DIAGRAM

BD101

T101TRANS

+

BR BL(BK)(WH)

C103

!

!

!

!!

FUSERESISTOR

(FR101)

NOISE FILTERBLOCK

(C101,L102,C102)

PHOTO COUPLER(IC102)

ERRORAMP

(IC103)

SNUBBERBLOCK

(D101,C105C106,R104)

DRIVE & S/W BLOCK(IC101, D102, R105, C104, C108 , C109,

C107,ZD102)

Y-CAPC111

Y-CAPC110

FEED-BACKBLOCK

(R141,R142,C143,R143.R144.R145

R146)

RECTIFIER &SMOOTING BLOCK(D124,C124,C134,R133,L124,C126)

RECTIFIER &SMOOTING BLOCK(D123,C127,C137,

L127)

RECTIFIER &SMOOTING BLOCK(D121,C126,R136)

RECTIFIER &SMOOTING BLOCK(D122,D125,C128,

L128,C138)

MOTOR VCC14VA

REG12V

8V

3.8V

5.3VA

M5V/5VT

33V

12V REG BLOCK(Q166,ZD151,C160,

R166,C159)

8V REG BLOCK(D126,IC141,R167,

C165)

5VT S/W BLOCK(Q163,C162,D127,

R156,R157)

33V S/W BLOCK(Q161,R154,R155Q173,R174,R177)

5V S/W BLOCK(Q165,C164,R172,

R174)

PWR CTLH

5.0V

9V REG BLOCK(Q164,ZD152,C161,

R168,C166)REG9V

PWR CTL BLOCK(Q162,C161,R164,

R163)

NOTES) WarningNOTES) Parts that are shaded are criticalNOTES) With respect to risk of fire orNOTES) electricial shock.

3-21 3-22

3. VPS BLOCK DIAGRAM

COMBI SCART

VPS_VIDEO

IIC C

LK

IIC D

ATA

2. Tu/IF, NICAM & A2 BLOCK DIAGRAM

MSP

3417

MSP

3407

SW1

SW2

AS A.O

UT

AFT

SIF

TU_A

_R

TU_A

_L

IIC DATA

IIC CLK

TU_SE_VL_H

TU_SECAM_H

33V

MOD_VIDEO

5V

MOD_AUDIO

5.4VA

5V AFT

TU_V

IDEO

3-23 3-24

4. Y/C BLOCK DIAGRAM

90 93 9684V.

ENV

87

70V.H.SW

C.ROTARYDATA

CLOCK

C.SYNC

V.OUT(MICOM)S2 V.OUT

S1 V.OUT

SYNC

IN

6968

67

C-De

lay

(1H/2H

)BP

FM

AIN

CONV

ACC

C LP

F

CCD

LPF

ACC

DET

CNC

2521

IC20

1LA

7010

0M

IC30

1LA

7175

0M

29

1814

PB F

M E

QFM

OEM

PB F

M

AGC

MAI

ND

E EM

P

Y-LP

F

YNR

SUB

LPF

60dB

AM

P

Y/C

MIX

6563

61

46 43Y-

Del

ay

7978

(PB Mode)

80

REC'H'

V.H.SW

C.ROTARY

DATA

CLOCK

C SYNC

V.OUTMICOM

V.IN4FRONTV.IN3DEC

7978

7675

7069

6867

6559

5854

52

50V.

IN2

S1

V.IN

1 TU

NER

48 46 43 33 32 31

CLK-

IN29

28

4.43

MH

z

2721

95948988

Kille

rC-

LPF

ACC

BPF

Mai

nCo

nvM

ain

Conv

DET

AIL

ENH

NL

EMPH

AW

/DCL

IP IC30

1LA

7175

0M

LP R

EC

SP R

EC

(To D

rum

)

(To D

rum

)

W/D

CLIP

REC

FM E

Q

Y-LP

FFB

C

AGC

SW

Y-D

ELAY

KILL

D

EC

REC

APC V

X02

VX02

COM

PAM

P

1H/2

HD

ELAY

YNR

2916

212

IC20

1 LA

7010

0M

COMBI SCART

(REC Mode)

3-25 3-26

5. Hi-Fi BLOCK DIAGRAM

IC802

A

BHi-Fi/REC

16 3

11

1

8 9

142 12

6

5IC801A.OUT

To JACK

DVD_FR_VIDEO

37

Hi-F

i PB

'B'

Hi-F

i PB

'A'

Hi-F

i REC1

2

34567

1011

21 22

36 35

16 A.OUT 'L'

A.OUT 'R'17

EU2.A.OUT.L19

EU2.A.OUT.R

DVD_H

20

89

AUDIO INPUTBLOCK

VIDEO INPUTBLOCK

AUDIO INPUT BLOCK

OSD

V. IN

DVD

/R V

. IN

RF_

H

DVD

A.IN

'L'

DVD

A.IN

'R'NORMAL AUDIO

OUT(To AVCP)

NORMAL AUDIOIN(From AVCP)

Tu A.IN 'L'

Tu A.IN 'R'DVD A.IN 'L'DVD A.IN 'R'EU1 A.IN 'L'EU1 A.IN 'R'EU2 A.IN 'L'EU2 A.IN 'R'AV2 A.IN 'L'AV2 A.IN 'R'

MODULATORA.OUT(To Tu)

COMBI SCART

SCART 2

7

3-27 3-28

6. SYSTEM BLOCK DIAGRAM

2fscL505, Q506, R537, 539, 584, 585, C553, 554

LD(+)LD(-)

L/M CONTROLR525, R526

COMBI SCART

R522, C568

MN101D10X

Q504, 505R506, 507, 508, 509, 511C504, 511

L503, C507, C509

L504, C505, C506

3-29 3-30

A B C D E F G H I J K L M N O P Q R S T

NOTES) Symbol denotes AC ground.NOTES) Symbol denotes DC chassis ground.

NOTE) WarningNOTE) Parts that are shaded are criticalNOTE) With respect to risk of fire orNOTE) electricial shock.

OPTIONAL PART

CIRCUIT DIAGRAMS1. POWER(SMPS) CIRCUIT DIAGRAM

IMPORTANT SAFETY NOTICE

WHEN SERVICING THIS CHASSIS, UNDER NO CIR-CUMSTANCES SHOULD THE ORIGINAL DESIGN BEMODIFIED OR ALTERED WITHOUT PERMISSIONFROM THE LG ELECTRONICS CORPORATION. ALLCOMPONENTS SHOULD BE REPLACED ONLY WITHTYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR-

CUIT. SPECIAL COMPONENTS ARE SHADED ON THESCHEMATIC FOR EASY IDENTIFICATION.THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIF-

FER FROM THE ACTUAL CIRCUIT USED. THIS WAY,IMPLEMENTATION OF THE LATEST SAFETY ANDPERFORMANCE IMPROVEMENT CHANGES INTOTHE SET IS NOT DELAYED UNTIL THE NEW SERVICELITERATURE IS PRINTED.

NOTE : 1. Shaded( ) parts are critical for safety. Replace only

with specified part number.2. Voltages are DC-measured with a digital voltmeter

during Play mode.

3-31 3-32

2. TU/IF CIRCUIT DIAGRAM


EE MODE(VIDEO)TU MODE (AUDIO)

3-33 3-34

3. A/V CIRCUIT DIAGRAM

1

4

5

2

7

8 1311 12

2

39

1014

6

2


PB SECAM COLOR

REC AUDIOPB Y+C

PB Y

PB C

REC Y+C

REC Y

REC CREC SECAM COLOR

PB AUDIO(MONO) WAVEFORM

Audio Tracking is failed.IC301 Pin 84 is defective.

EE, PB Screen doesnt appear.Q305 is defective.PB COLOR Signal disappear.

IC301 Pin70 is defective.

PB COLOR Signal disappear.X301 is defective.

D301or IC301 Pin 80REC is defective.

PB and Recording is failed.(IC301 doesnt operate.)

IC301 Pin 69, 68 are defective.

Normal Audio signal is not recorded.Q306 is defective.

No mono Audio Signalin PB MODE.

Q302, Q303, Q314are defective.

3-35 3-36

4. Hi-Fi CIRCUIT DIAGRAM


PBREC

44 Pin is defective.Hi-Fi Audio is not appear.

IC801 Pins42, 43 aredefective.All Audio is not appear.

3-37 3-38

5. SCART(JACK) CIRCUIT DIAGRAM


3-39 3-40

6. SYSTEM CIRCUIT DIAGRAM

1

3

4

8

5

6

72

WAVEFORM


Q501, Q503 are defective.-COM is unstable.

IC505 is defective.VCR will not operate.

Q506, Q507 are defective.LED will not operate.

X501 is defective.

CLOCK SETTING will not operate.

X502 is defective.-COM will not operate.

ES501, ES502, LD501 aredefective.

Auto Rew will not working.RS501,RS502 aredefective.

Auto stop occures.

R575, R576, R577,R578 are defective.

Deck will not operate.

3-41 3-42

WAVEFORMS

IC301 Pin 75PB mode500mvp-p

IC301 Pins 48, 50,54, 56Video in 1Vp-p

IC301 Pin 67PB/REC mode4.0Vp-p

IC301 Pin 100REC mode1.1Vp-p

IC301 Pin 3REC mode2.0Vp-p

IC301 Pin 65PB mode2.02Vp-p

IC301 Pin 43PB mode400mVp-p


IC301 Pin 68PB/REC mode5Vp-p

IC301 Pin 69PB/REC mode5Vp-p

IC301 Pins 21REC mode340mVp-p

IC301 Pins 25 PB mode300mVp-p


IC301 Pin 70PB mode3.6Vp-p

* IC301 Oscilloscope Waveform * IC501 Waveform Photographs

V.HSW(IC501 Pin 23)1V/10mSREC/PB MODE

DV.SYNC(IC501 PIN 24)1V/100uSQUE/REV MODE

CTL(+)(IC501 Pin 74)1V/10mS

CTL(-)(IC501 Pin 75)1V/10mS

DFG/DFG(IC501 PIN 65)1V/10mSREC/PB MODE

CFG(IC501 Pin 67)1V/10mS

V.IN(IC501 Pin 49)500mV/20uS

V.OUT(IC501 Pin 47)500mV/20uSEE/PB MODE

3-43 3-44

CIRCUIT VOLTAGE CHARTEE PBMODEPIN NO.

1 1.67 1.672 1.88 1.893 1.28 1.284 1.71 1.725 1.28 1.296 0.01 0.017 0.01 0.018 5.24 5.259 0.01 0.01

10 0.02 0.0211 2.62 2.6712 2.53 2.6113 2.72 2.7214 2.39 2.3815 2.6 2.616 2.59 2.5617 3.44 3.4418 1.58 1.5719 5.24 5.2420 1.1 1.121 5.24 5.2422 0.01 0.0123 1.7 2.0524 0.43 0.425 2.9 2.8626 1.7 1.727 1.7 1.728 3.26 3.26

1 5.04 5.012 0.21 0.093 2.38 2.374 0.11 0.835 2.37 2.366 2.37 2.377 2.36 2.368 2.36 2.369 2.35 2.35

10 2.38 2.3711 2.44 2.4912 0.01 0.0113 2.35 2.3414 0.36 0.0315 2.35 2.3416 5.07 0.2317 2.34 2.3518 5.07 5.0619 4.07 4.0820 0.01 0.0121 3.23 2.0222 2.62 4.4423 2.62 4.6624 5.06 5.0425 0.12 3.33

I C 2 0 1

I C 3 0 1

I C 4 0 2

I C 3 S 1

EE PBMODEPIN NO.26 0.92 1.0827 0.03 2.1528 3.98 3.9629 2.61 2.6130 0.01 0.0131 0.46 1.5532 4.74 4.9633 2.05 2.0934 0.05 0.0735 2.54 2.5436 2.72 2.7737 1.91 1.9138 1.99 2.0239 9.32 9.340 0.01 0.0141 0.01 0.0142 5.01 543 2.06 2.7144 0.04 4.1745 2.55 1.1646 2.42 3.2847 4.1 4.148 3.09 3.1249 2.91 2.8450 1.93 1.9351 0.01 0.0152 1.86 1.9453 1.33 2.3154 1.93 1.9855 5.18 5.1756 2.14 2.8657 1.44 1.0158 1.96 1.8559 2.9 2.9260 1.45 1.5761 1.57 2.6362 0.16 0.1663 1.57 2.7764 0.01 0.0165 0.83 2.5166 0.01 0.0167 4.4 0.0168 5.01 4.9969 5.01 5.0470 1.88 2.5771 0.01 0.0172 5.05 5.0373 2.18 1.0174 2.25 3.9575 2.19 0.7376 2.19 0.8477 1.66 0.5678 2.62 3.3279 2.12 1.9980 0.99 0.99

EE PBMODEPIN NO.81 1.13 1.1482 0.01 0.0183 5.04 0.5484 0.13 0.1185 0.01 0.0186 0.45 0.4487 1.92 0.7988 1.94 0.7989 1.94 0.7990 1.89 0.7991 5.06 5.0592 0.01 0.0193 1.91 1.9294 1.91 1.9295 1.86 1.9196 1.91 1.9197 0.01 0.0198 2.38 2.3799 2.38 2.37100 2.38 2.37

1 2.52 2.522 2.42 2.423 3.57 3.574 2.58 2.585 0.08 0.086 0.56 0.567 0.01 0.018 0.01 0.019 3.05 3.0510 2.52 2.5211 2.67 2.6712 3.23 3.2313 4.04 4.0414 2.51 2.5115 1.98 1.9816 3.22 3.2217 0.04 0.0418 0.13 0.1319 2.28 2.2820 2.59 2.5921 1.96 1.9622 0.08 0.0823 5.03 5.0324 5.03 5.0325 1.56 1.5626 1.56 1.5627 2.04 2.0428 0.19 0.1929 4.38 4.3830 2.09 2.09

1 5.89 5.892 3.08 3.23 3.08 3.19

I C 5 0 1

EE PBMODEPIN NO.4 0.01 0.015 3.08 3.226 3.08 3.227 5.9 5.98 11.79 11.79

1 1.44 1.892 0.02 4.473 4.22 2.054 4.75 4.745 4.77 4.756 0.11 0.117 0.02 0.028 5.12 5.119 4.92 4.9110 1.43 1.4511 3.38 3.3712 3.39 3.3913 2.57 2.614 5.13 5.1115 2.31 1.6716 0.03 0.0317 5.02 5.0518 5.02 4.9719 2.6 0.3120 0.06 3.5121 5.11 0.0222 2.41 1.723 2.59 2.5824 0.16 0.1625 5.16 5.1426 2.55 2.5627 4.92 0.0228 0.02 4.8829 0.02 0.0230 0.02 0.3531 0.08 0.0232 0.02 0.0133 2.64 2.6934 0.02 2.6535 5.17 0.0136 2.59 5.1537 2.38 2.5838 0.01 2.439 2.09 0.0240 2.55 2.1841 0.01 2.5742 0.02 0.0143 5.16 0.0144 5.16 5.1545 0.01 5.1546 1.63 0.0247 0.01 2.0648 1.02 0.0149 1.91 2.07

I C 5 0 3

I C 6 0 1

EE PBMODEPIN NO.50 4.96 2.6251 3.07 4.9752 2.47 3.0553 2.45 2.4854 2.03 2.4655 0.01 2.0356 0.01 0.0257 0.09 0.0158 5.08 0.0259 0.09 0.0260 5.09 5.0761 0.11 0.0262 0.77 0.0263 0.15 0.0364 2.59 5.0965 1.38 1.3866 1.65 1.7467 0.16 2.4368 2.39 1.6969 2.59 2.5870 2.59 2.5871 0.01 0.0172 2.28 2.5773 5.16 5.1474 2.28 2.5775 0.02 2.5876 2.58 2.5677 0.01 0.0278 0.01 0.0279 5.16 5.1480 5.15 5.1481 4.51 4.5282 0.15 0.1283 0.22 0.8784 0.2 0.285 0.15 0.1486 5.18 5.1787 5.17 5.1888 5.18 5.1789 0.01 0.0290 5.15 5.1391 5.01 5.0192 0.02 0.0293 5.17 5.1694 2.36 1.4495 0.02 0.0296 5.12 5.1197 5.12 0.0298 2.58 2.5699 0.02 0.02100 0.69 0.49

1 0.01 0.012 0.01 0.013 0.01 0.01

I C 5 F 1

EE PBMODEPIN NO.4 0.01 0.015 5.04 5.056 5.01 4.997 0.01 0.018 5.16 5.16

1 2.22 2.152 0.03 0.033 5.12 5.114 4.89 4.95 4.51 4.416 2.68 2.877 2.86 2.858 2.32 2.629 2.37 2.3110 1.35 2.3111 2.6 2.2812 2.37 2.1313 0.85 0.3114 1.95 0.315 2.38 2.3616 2.36 2.3317 2.37 2.3518 4.52 4.4319 0.01 0.0120 2.4 2.3721 0.27 2.3322 2.39 2.3823 2.52 2.4924 0.01 0.01

1 0.01 1.72 3.29 3.263 3.29 3.274 0.08 0.45 0.05 0.46 0.05 0.37 1.72 1.98 1.72 0.89 2.78 0.510 1.72 0.711 0.01 1.612 0.01 0.0113 3.44 3.2814 0.01 2.115 3.43 3.116 1.71 2.717 3.31 3.118 1.7 2.219 0.7 120 0.01 0.0121 3.39 3.2422 2.6 2.923 3.39 3.2524 2.4 2.5

EE PBMODEPIN NO.25 1.86 1.926 1.1 1.6327 2.5 1.0828 0.01 0.0129 0.01 0.0130 2.7 1.2231 0.01 0.0532 0.01 0.0133 2.7 3.234 3.28 3.2435 0.4 1.1336 1.7 1.537 2 2.538 1.7 3.939 0.01 1.240 1.7 1.541 3.4 3.2842 0.01 1.543 1.71 2.744 1.82 3.1945 1.69 1.646 1.7 1.547 3.41 3.2848 1.68 3.0449 1.68 3.0350 0.01 0.0151 3.39 3.2752 3.39 3.2953 1.63 154 0.13 0.555 0.13 1.2656 0.12 0.557 1.64 158 3.39 3.2859 0.12 0.460 1.64 1.561 0.12 0.562 0.01 0.0163 0.01 0.464 1.85 1.865 1.38 0.0366 0.01 0.0167 0.03 0.3468 3.39 3.2869 0.01 0.0170 3.36 3.2271 0.09 0.3772 0.01 0.0173 0.01 3.2374 3.37 3.2575 3.38 3.2876 3.39 3.2877 3.38 3.1778 0.01 0.0279 0.01 0.01

EE PBMODEPIN NO.80 1.6 1.4981 3.39 3.2782 1.59 1.9183 0.01 0.0184 1.4 1.2585 1.8 1.586 1.6 187 3.39 3.2888 1.6 1.389 1.8 290 1.7 1.591 0.01 0.0192 1.61 1.8993 0.01 1.894 1.29 1.9995 0.01 0.0196 1.69 2.297 3.39 3.2898 1.69 1.8599 1.78 1.3100 1.58 1.52101 0.01 0.01102 1.61 1.81103 1.61 1.9104 1.61 1.7105 3.39 3.28106 0.01 0.01107 0.01 0.01108 0.01 0.01109 0.01 0.01110 1.68 1.61111 0.02 0.01112 0.02 0.01113 0.01 1.07114 0.01 0.01115 1.69 1.64116 1.69 1.61117 0.01 0.01118 1.69 1.5119 3.39 3.25120 0.01 0.01121 0.01 0.01122 0.01 0.01123 0.01 0.01124 1.7 1.64125 3.39 3.28126 0.01 0.01127 0.07 3.25128 0.01 0.01129 0.01 0.01130 0.01 0.01131 1.85 2.35132 3.37 0.04133 3.38 3.21134 3.38 3.21

EE PBMODEPIN NO.135 3.03 0.01136 0.03 0.01137 0.01 3.26138 3.39 3.25139 0.01 0.01140 0.01 0.01141 3.29 3.35142 1.89 2.32143 1.66 2.6144 1.66 2.26145 0.01 0.01146 0.01 0.01147 0.75 1.23148 0.01 0.01149 3.37 3.21150 0.98 1.32151 0.98 1.31152 3.39 3.26153 1.28 1.62154 1.28 1.65155 0.01 0.01156 0.01 0.01157 1.65 1.31158 1.65 1.31159 3.25 3.36160 2.64 3.21161 3.25 3.2162 2.64 3.21163 3.25 3.21164 2.64 3.2165 0.01 0.01166 2.64 3.14167 1.88 2.15168 0.01 0.01169 2.64 2.1170 1.88 2.3171 2.01 2.3172 1.8 2.2173 1.74 2.3174 1.71 1.69175 0.11 1.68176 0.1 0.16177 3.15 0.36178 3.15 3.2179 3.13 3.25180 0.01 0.01181 0.01 0.01182 10.8 2.3183 0.01 3.25184 0.01 0.01185 0.01 0.2186 3.29 3.26187 3.28 3.26188 0.01 0.02189 0.01 0.01

I C 6 0 3

EE PBMODEPIN NO.190 0.1 1.3191 1.2 3.26192 3.3 0.01193 0.01 0.01194 0.01 0.01195 1.7 1.36196 1.8 0.01197 0.01 2.41198 1.4 3.26199 3.3 0.01200 0.01 0.01201 0.01 1.36202 1.51 2.9203 3.9 3.26204 3.3 3.25205 0.01 3.28206 3.24 3.28207 3.25 3.27208 3.24 0.39

1 3.37 3.382 1.67 2.253 3.37 3.374 1.73 1.775 1.8 1.636 0.01 0.017 1.71 2.28 1.6 2.239 3.38 3.37

10 3.38 2.0711 1.97 1.0312 0.01 0.0113 0.16 1.0514 3.38 3.3715 0.01 0.0116 3.36 3.2517 3.36 3.2918 3.34 3.1819 3.34 3.3120 0.19 0.3921 3.34 3.1322 1.2 2.0523 0.15 0.3924 0.14 0.5625 0.38 0.3426 0.3 0.4927 0.34 0.4528 0.01 0.0129 1.93 0.3330 1.94 0.2431 0.15 1.5832 0.17 0.0833 0.04 0.1934 0.27 3.1535 0.27 2.56

3-45 3-46

+ -

STOP PLAY- +

Tran-sistorC201 5.11 0 5.11 0C208 3.36 3.21 3.37 3.21C209 3.37 3.21 3.37 3.21C214 5.33 0 5.33 0C216 3.38 0 3.38 0.01C217 1.82 0 1.82 0C223 3.37 0 3.37 0C302 5.08 0 5.08 0C304 5.03 0 5.03 0C307 2.36 0 2.37 0C308 0.01 0 0.01 0C311 0.12 0 0.12 0C314 2.37 0 2.37 0C315 2.95 2.29 2.93 2.45C316 1.56 0 1.56 0C318 2.87 0 2.88 0C320 2.52 0 2.53 0C322 4.11 0 4.12 0C323 2.37 0 2.37 0C324 2.55 0 2.55 0C325 2.92 0 3.14 0C327 2.68 2.39 2.68 2.39C331 0.03 0 0.03 0C333 5 0 5.01 0C336 50.8 0 5.08 0C337 2.69 0 2.69 0C339 2.64 0 2.66 0C346 5.07 0 5.07C347 2.15 0 2.16 0C348 1.54 0 1.54 0C349 5.07 0 5.06 0C356 2.05 0 2.11 0C357 2.07 0 2.07 0C388 5.08 0 5.09 0C3S3 3.56 0 3.56 0C3S4 0.43 0 0.43 0C3S7 3.15 0 3.15 0C3T1 1.98 0 1.98 0C3T2 2.49 0 2.49 0C3T3 2.51 0 2.51 0C3T4 2.25 0 2.25 0C3T6 5.06 0 5.06 0C413 5.1 0 5.1 0C414 5.11 0 5.11 0C414 5.11 0 5.11 0C416 5.89 0 5.89 0C417 5.88 0 5.88 0C501 5.16 0 5.16 0C502 5.15 0 5.14 0C504 3.17 2.16 3.09 2.47C505 5.14 0 5.14 0C507 4.99 0 4.98 0C511 3.2 1.43 3.25 1.75C511 6.56 0 6.56 0C522 2.58 0 2.57 0

+ -

STOP PLAY- +

Tran-sistorC523 2.58 2.57 2.58 2.56C524 2.58 0 2.58 0C534 0.17 0 0.17 0C535 0.01 0 0.01 0C5G2 4.6 0 4.59 0C5R1 4.8 0 4.74 0C612 3.39 0 3.39 0C614 3.32 0 3.32 0C616 3.31 0 3.31 0C618 1.78 0 1.78 0C642 1.8 0 1.8 0C643 3.37 0 3.38 0C673 3.38 0 3.38 0C6C9 3.38 0 3.38 0C702 4.95 0 4.94 0C710 30.29 0 30.29 0C718 5.05 0 5.06 0C719 5.05 0 5.05 0C727 5.06 0 5.06 0C729 2.74 0 2.74 0C732 2.59 0 2.59 0C751 5.11 0 5.11 0C7S1 4.93 0.51 4.93 0.51C7S2 4.92 0 4.92 0C7V1 5.87 0 5.87 0C7V3 3.3 1.68 3.3 1.68C806 0.06 0 0.06 0C807 0.09 0 3.22 0C812 3.89 0 3.89 0C814 3.89 0 3.91 0C815 0.76 0 0.76 0C816 3.89 0 3.89 0C817 0.76 0 0.76 0C818 3.9 0 3.9 0C820 3.88 0 3.88 0C822 11.7 0 11.7 0C825 5.07 0 5.07 0C828 5.88 2.55 5.88 2.55C829 5.87 2.53 5.86 2.53C830 2.96 2.51 2.97 2.51C831 2.35 2.06 2.35 2.14C832 2.97 2.59 2.97 2.96C833 2.35 2.3 2.35 2.3C850 6.56 6.11 6.56 6.11C851 5.77 0 5.77 0C852 6.57 6.11 6.57 6.11C853 5.77 0 5.77 0C856 11.79 0 11.79 0C887 6.11 0 6.11 0C888 6.11 0 6.11 0C892 6.58 1.11 6.57 1.11C902 1.35 0.06 1.35 0.06C904 1.35 0.33 1.35 0.33C941 5.07 0 5.07 0C945 0.01 0 0.01 0

+ -

STOP PLAY- +

Tran-sistorC946 0.01 0 0.01 0C948 1.57 1.64 1.58 1.64C971 4.17 4.15 2.85 2.82C974 1.61 0.95 1.61 0.95C975 2.22 0.04 2.22 0.04C976 2.23 0.65 2.23 0.65C978 2.24 0 2.24 0C979 1.63 0.46 1.63 0.46C980 2.23 0.32 2.23 0.32C981 1.41 0.16 1.41 0.16C983 2.31 0.32 2.31 0.32C984 1.13 0.11 1.13 0.11C985 2.32 0.41 2.32 0.41C987 5.1 0 5.09 0

22 3.77 3.8323 3.87 3.8124 3.88 3.7925 3.89 3.8826 0.79 0.7927 0.01 0.5628 3.85 3.8529 3.89 3.8830 0.79 0.831 3.88 3.8732 3.89 3.8533 3.88 3.8634 11.71 11.7135 0.66 0.6536 0.47 2.2737 0.48 0.6538 0.01 0.0139 0.66 0.7640 5.08 5.0641 0.01 0.9242 5.03 5.0443 4.99 4.9744 0.08 0.95

IC 8021 5.78 5.782 4.99 4.993 5.09 5.094 0.01 0.015 5.07 5.076 5.88 5.887 0.02 0.028 6.57 6.579 0.41 0.4710 0.01 0.0111 6.59 6.5912 4.99 5.0113 11.78 11.7814 5.76 0.4815 0.01 0.0116 6.58 6.58

IC 9031 5.1 5.12 0.11 0.113 0.09 0.094 2.23 2.235 5.1 5.16 1.24 1.247 0.02 0.028 1.58 1.589 2.24 2.2410 0.01 0.0111 1.41 1.4112 0.01 0.0113 2.21 2.2114 5.11 5.1

33 5.05 5.0534 4.1 4.135 0.01 0.0136 2.72 2.7237 0.04 0.0438 0.04 0.0439 0.04 0.0440 2.72 2.7241 2.71 2.7142 2.59 2.5943 2.45 2.4544 0.01 0.01

IC 7V11 0.01 0.012 0.01 0.013 0.05 0.074 5.03 5.015 5.04 5.036 0.01 0.017 5.16 5.168 0.05 0.059 5.16 5.1610 5.16 5.1611 0.01 0.0112 0.02 0.0913 0.07 0.0814 0.01 0.0115 0.01 0.0116 1.56 1.5617 1.02 1.0218 0.07 0.0719 5.16 5.1520 5.16 5.15

1 3.84 3.842 3.83 3.843 3.83 3.824 3.83 3.855 3.83 3.846 3.84 3.867 3.84 3.868 3.83 3.839 3.83 3.8510 3.83 3.8511 3.84 3.8412 0.36 0.0213 3.88 3.8814 0.13 0.0115 0.12 0.0116 6.09 6.117 6.09 6.0918 0.1 0.0119 6.08 6.0820 6.08 6.0821 4.6 4.6

EE PBMODEPIN NO.36 0.29 3.5637 3.38 3.3738 1.78 1.7739 0.01 0.0840 0.04 0.0841 0.04 0.0142 1.9 1.3943 3.37 3.3744 1.64 1.845 1.7 1.3746 0.04 0.0147 1.68 1.5348 0.02 1.9949 3.38 1.6850 1.89 0.2551 0.81 1.4852 0.01 0.4753 1.35 1.2654 0.01 0.01

1 0.4 0.362 1.28 0.353 1.22 1.674 1.63 1.365 1.05 0.356 1.54 0.337 1.06 1.368 2.33 2.289 0.02 0.3410 0.07 0.3111 3.37 3.3712 4.91 4.9113 3.37 3.3814 3.37 3.3815 1.05 0.3116 0.07 1.5817 1.06 2.7618 2.63 1.219 1.46 3.3720 1.54 3.3821 0.01 3.3722 0.01 3.3823 0.07 3.3424 3.33 3.3425 0.01 3.3826 3.37 0.0127 0.01 3.3828 3.37 0.0229 0.01 0.0130 0.34 0.0131 0.33 0.0132 2.86 2.933 2.86 0.0234 0.01 1.7835 0.01 1.88

I C 6 0 4

I C 7 5 1

I C 6 0 5

I C 8 0 1

I C 9 0 3

I C 7 V 1

EE PBMODEPIN NO.36 0.02 3.3837 3.37 1.9638 2.87 1.9239 2.95 1.8940 0.01 0.2641 0.02 1.9242 0.01 1.9643 2.95 1.9544 2.88 1.9445 2.88 0.0146 0.01 3.3847 3.37 3.3748 0.01 3.09

1 0.01 0.012 0.01 0.013 0.01 0.014 0.01 0.015 0.12 0.46 3.35 3.357 0.01 0.018 3.35 3.35

1 5.05 5.052 1.52 1.523 1.52 1.524 0.01 0.015 2.4 2.416 2.35 2.377 0.98 0.998 0.01 0.019 0.01 0.0110 0.01 0.0111 5.05 5.0512 5.01 5.0213 5.02 5.0414 1.16 1.1815 1.06 1.0916 1.08 1.0917 1.04 1.0518 1.03 1.0519 5.02 5.0220 0.01 0.0121 1.06 1.0722 5.05 5.0523 0.01 0.0124 0.01 0.0125 0.01 0.0126 0.01 0.0127 0.05 0.0528 0.03 0.0429 0.01 0.0130 2.7 2.7131 2.7 2.7232 0.04 0.04

EE PBMODEPIN NO.

I C 8 0 2

EE PBMODEPIN NO. EE PBMODE

PIN NO.15 2.22 2.2216 5.11 5.1117 2.3 2.318 2.3 2.319 0.01 0.0120 2.3 2.321 2.3 2.322 0.01 0.0123 1.18 1.1824 1.06 1.0625 0.01 0.0126 1.41 1.4127 1.51 1.5128 0.01 0.0129 1.5 1.530 1.62 1.6231 0.06 0.0632 2.35 2.35

3-47 3-48

Base BaseSTOP PLAY

Emitter EmitterCollector CollectorTran-sistorQ201 2.29 2.45 3.18 2.29 2.45 3.17Q202 1.83 1.91 2.59 1.83 1.91 2.59Q204 3.4 2.89 3.67 3.39 2.86 3.65Q205 3.21 3.27 3.34 3.21 3.27 3.34Q206 2.9 5.26 3.67 2.9 5.26 3.65Q207 2.54 4.88 3.37 2.54 4.6 3.36Q208 5.02 0.19 0.01 5.02 0.19 0.01Q209 2.34 2.89 3.34 2.34 2.89 3.34Q302 -2.07 5.08 5.09 -1.27 5.09 5.09Q303 0.14 -0.99 0.22 0.23 -0.96 0.22Q304 0.01 -0.77 0.21 0.01 -1.08 0.12Q305 0.01 1.88 2.55 0.01 1.88 2.55Q309 0.01 1.65 2.29 0.01 1.65 2.29Q401 0.01 -0.68 5.91 0.01 -0.68 5.91Q402 0.01 -0.65 5.9 0.01 -0.66 5.9Q403 5.09 0.01 0.01 5.09 0.01 0.01Q404 -0.75 5.09 5.09 -0.75 5.09 5.08Q405 -0.91 11.79 11.85 -0.91 11.79 11.85Q501 0.03 0.7 0.01 0.03 0.7 0.01Q504 0.01 2.52 3.13 0.01 2.54 3.13Q505 0.01 2.54 3.19 0.01 2.52 3.19Q506 3.81 0.6 0.04 2.84 0.6 0.04Q601 0.01 0.04 0.19 0.01 0.05 0.19Q7S1 4.09 0.02 0.01 4.14 0.18 0.01Q7S2 0.02 5.1 0.01 0.02 5.11 0.01Q801 0.13 -0.84 0.01 0.13 -0.84 0.01Q802 0.12 -0.76 0.01 0.05 -0.84 0.01Q807 0.01 0.09 2.97 0.01 0.09 2.97Q808 0.01 2.36 2.97 0.01 2.36 2.97Q905 0.19 0.37 1.01 0.19 0.37 1.01Q906 0.01 0.14 0.15 0.01 0.14 0.15Q907 11.79 0.02 11.85 11.79 0.02 11.85Q908 0.02 5.11 0.01 0.02 5.11 0.01Q909 0.08 5.11 0.01 0.08 5.11 0.01Q910 0.01 3.55 4.22 0.01 3.55 4.22Q911 0.01 0.74 0.01 0.01 0.74 0.01Q912 0.01 0.74 0.01 0.01 0.74 0.01Q913 0.01 0.74 0.01 0.01 0.74 0.01Q914 5.06 3.41 2.72 5.06 3.41 2.72

3-49 3-50

PRINTED CIRCUIT DIAGRAMS1. MAIN P.C.BOARD (TOP SIDE)

LOCATION GUIDE

3-51 3-52

2. MAIN P.C.BOARD (BOTTOM SIDE)

LOCATION GUIDE

3-53 3-54

4. KEY P.C.BOARD LOCATION GUIDE

3. POWER P.C.BOARD

NOTES) WarningNOTES) Parts that are shaded are criticalNOTES) With respect to risk of fire orNOTES) electricial shock.

3-55

ELECTRICAL TROUBLESHOOTING GUIDEDVD PART

1. POWER CHECK FLOW

No 3.4VA.

No 3.4VA

Is 3.4VA section working?

Is 3.4V present at emitterof Q121?

Replace Q121.

Replace IC101.

Is there a DC voltage atCathode of D105 or D107?

Check FR101

No 5V

Is 3.4VA section working?

Replace Q126.

Is 5.6V present at collectorof Q126?

NO

NO

YES YES

YES

Check D105/D106/D107/D108 and replace.

YES

YES

A. B.

NO

NO

NO

3-56

2. SYSTEM OPERATION FLOW

NO

NO

NO

YES

YES

YES

YES

YES

Power On

1. 186 CPU initializes SERVO,DSP & RISC registers2. Write RISC code to SDRAM3. Reset RISC

Show LOGO

Tray Closed ?

Tray Close to Closed position

SLED at Inner Side ?

SLED Moves to Inner Position

1. Judge whether have disc and disc type2. Jump to related disc reading procedure

Recieve OPEN/CLOSE Key?

1. Execute Pressed Key & IR Key2. System operation Routine Loop

1. Stop Playback & Open Tray2. Display tray open message & LOGO

Receive CLOSE Key?

3-57

3. Test & debug flow

TEST

Check the AC VoltagePower PCBA(110V or 220V)

YES

Switch on the Power PCBA

YES

Is the DC Voltage outputs OK?(5V, 3.3V, 12V, 5.6V MOTOR)

YES

Make sure the main PCBA don't short onVCCs and switch it on.

YES

Is 3.3V outputs normal on main PCBA?

YES

Connect to PC RS232 Cable and updatethe FLASH memory code.

YES

Update FLASH successfully?

YES

A

Replace power PCBA or AC transformer.NO

Repair or Replace Power PCBANO

Check the regulators or related diodes.NO

Is 1.8V Voltage normal for Zoran IC

YES

1. Check Q203. 2. Check D201.3. Check IC102

NO

1. Check 27MHz system clock.2. Check system reset circuit.3. Check FLASH R/W enable signal

PRD,RWR.4. Check RS232 SIGNALS.5. Check FLASH Memory related circuit.

NO

3-58

NO

NO

YES YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

A

RESET or Power On.

Flash Memory operatesproperly?Show LOGO?

Does Tray move inside whenit is not at closed position?

B

Check connection lines betweenFLASH & ZR336888 and the FLASHaccess time whether is suitable or not.

SDRAM works properly?Check connection linesbetween SDRAM & ZR36882and the SDRAM is damaged.

ZR36882 VIDEO outputsproperly?

Check the related circuit ofZR36882

Have TV signal output?

Check AV cable connectionto TV set.

Normal OUTSW & INSWsignals?

Check the filtering and ampcircuit of TV signal.

Check the load OPEN &CLOSE switch

Normal OPEN & CLOSEsignal?

Check the Tray control IOpins on ZR36882 &AM5869S

Normal LOAD+ & LOAD -signal?

Check the cable connectionbetween main PCBA andloader.

Check the Tray controlamplifying circuit on Motordriver.

3-59

B

Motor Driver MUTE Pin isHigh?

Does the SLED move toinner side when it is at outterposition?

Do not put in disc and trayclose.

Optical Lens has movementsfor searching Focus?

C

NO

NO

YES

YES

YES

YES

YES

YES

Check the connection line ofMUTE signal.

NO

Is SLED_S DC Level higherthan 1.65V?

Check the related circuit ofFMSO.

NO

SLED+ and SLED- outputproperly?

YES

Check the amp circuit onmotor driver.

Check FOCUS_S connectionOn ZR36882 and motor dirv-er.

NO

NO

Check the cable connectionwith MECHA.

Proper FOCUS_S outputs tomotor driver?

Proper FACT+ &FACT- outputs?

Check the amp circuit onmotor dirver.

NO

Check cable connect on withpick-up head.

3-60

C

LD_DVD or LD_CD output properly?

Laser turns on when reading disc?

Put disc in?

Disc ID is correct?

Does spindle rotate?

D

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

Check the laser power circuiton ZR36882 and connectingto power transistor.

NO

Collector voltage of powertransistor is OK?

Check the related circuit onlaser power transistor

NO

Check cable connectionbetween transistor ouputand pick-up head.

YES

YES

YES

Check the related circuit on ZR36882 RFL signal.

Check SPINDLE_S relatedcircuit on ZR36882.

NO

NO

Check the spindle controlamp circuit of motor driver.

NO

Laser off

Proper RF signal onZR36882?

Check LD_DVD & LD_CDsignal

Proper SPINDLE_S signalon ZR36882

SP+ & SP- output properly?

Check the cable connectionbetween spindle and mainPCBA.

3-61

D

Proper signals on A,B,C,Dof ZR36882Focus ON OK?

Track On OK?

Disc is play ?

E

NO

NO

NO

YES

YES

YES

YES

YES

Check connections betweenZR36882 and pick-up head.

NO

Check FE signal onZR36882

YES

Check the FOCUS_S connection on ZR36882and motor driver.

NO

Check FOCUS_S signalon ZR36882

YES

YES

Check the TRACK_S connection on ZR36882and motor dirver.

NO

Check the tracking controlamp circuit on motor driver.

NO

Normal TE Signal onZR36882?

NO Check the related circuit on ZR36882

Properly TRACK_S signalon ZR36882?

TACT+ & TACT- outputproperly?

Check cable connection onpick-up head.

Check RF signal waveform.

3-62

E

Audio DAC received correct data stream?

Normal Audio outputwhen disc playback?

Normal IR.VFD & Frontpanel key functions?

TEST END

NO

NO

YES

YES

YES

YES

Check connection betweenZR36882 & Audio DAC.

NO

Normal Audio DAC out?

YES

Check the related circuit ofAudio DAC.

NO

Check Audio filter, amplify,mute circuit.

Communications betweenIR.VFD Front panel key &ZR36882 is normally?

NO Check communication lineson ZR36882

Check the cable connectionon Front panel.

3-63

DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING1. SYSTEM 27MHz CLOCK, RESET SIGNAL

1) ZR36882 main clock is at 27MH(X601)

FIG 1-1

3.1V,27MHz

2) ZR3682 reset is low active

FIG 1-2

Reset Time

3.3VA

PWR_CTL

RESET

3-64

2. SDRAM CLOCK1) SDRAM clock is at 143MHz

FIG 2-1

IC603 PIN38

CLK=143MHz,Vp-p=3.3V

3. TRAY OPEN/CLOSE SIGNAL1) Tray open/close waveform

FIG 3-1

OPEN

OPEN CLOSE

CLOSE

LM-

LM+

3-65

2) Tray open waveform

FIG 3-2

3) Tray close waveform

FIG 3-3

OPEN

CLOSE

LM-

LM+

OPEN

CLOSE

LM-

LM+

3-66

4. SLED CONTROL RELATED SIGNAL(NO DISC CONDITION)

FIG 4-1

5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION)

FIG 5-1

FOCUS_S

FOCUS+

FOCUS-

SLED_S

DRVSB

SLED+

SLED-

3-67

6. LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION)

FIG 6-1

7. DISC TYPE JUDGEMENT WAVEFORM

FIG 7-1(DVD)

DCLK = 128MHz, Vp-p=2.2, Vmax=2.7V

FACT+

FE

SBAD

VR_CD

DVD_LD

CD_LD

3-68

FIG 7-2 (DVD)

FIG 7-3 (CD)

FACT+

FACT+

FE

FE

SBAD

SBAD

3-69

FIG 7-4 (CD)

8. FOCUS ON WAVEFORM

FIG 8-1 (DVD)

FE

FOSO

FACT+

FACT-

FACT+

FE

SBAD

3-70

FIG 8-2 (CD)

9. SPINDLE CONTROL WAVEFORM(NO DISC CONDITION)

(DVD) FIG 9-1

FOCUS

FACT+

SPINDLE_S

SP+

SP-

FE

FACT-

3-71

10. TRACKING CONTROL RELATED SIGNAL(System checking)

FIG 10-1 (DVD)

FIG 10-2 (CD)

TE

TRACK_S

TACT+

TACT-

TE

TRACK_S

TACT+

TACT-

3-72

11. RF WAVEFORM

FIG 11-1

12. ZR36882 AUDIO OPTICAL AND COAXIAL OUTPUT(SPDIF)

FIG 12-1

RFO

SPDIF

3-73

13. ZR36882 VIDEO OUTPUT WAVEFORM1) Full colorbar signal(CVBS)

FIG 13-1

2) Y

FIG 13-2

JK702 pin6

JK702 pin7

3-74

14. AUDIO OUTPUT FROM AUDIO DAC1) AUDIO L/R

FIG 14-1

3) C

FIG 13-3

JK702 PIN8

JK702 PIN4,5

1KHz 0DB

3-75

2) Audio Related Signal

FIG 14-2

AOUT0

ABCK

ALRCLK

3-76

BLOCK DIAGRAMS1. SYSTEM BLOCK DIAGRAM

M

M

DIS

C

SPIN

DLE

MO

TOR

LOAD

ING

MO

TOR

DECK MECHANISM

DVD

:RF,

A,B,

C,D

CD:R

F,A,

B,C,

D,E

,F

PICK UP

IC60

4M

X26L

V160

TFL

ASH

RO

M

Y / C

AC 90

V~24

0V50

HZ/6

0Hz

OPE

N, CL

OSE

27M

Hz

X-TA

L

IC60

5K

S24C

021C

SEE

PRO

M

IC40

2N

JM45

80O

P-AM

P

LOAD+/-

FACT+/-,TACTT +/-

MOT_SPDL +/-

SLED

(FEE

DING

)M

OTO

R

SLED+,SLED--

IC20

1AM

5869

SM

OTO

RD

RIV

ER

M5V

DV3

3

RFV

33/D

V33/

1.8V

ALPC

LK , AB

CLK

AMCL

K , A

OUT

O

ASPD

IFCO

AX

OPT

ICAL

DVD

_LD

,CD_

LD,

VC

M5V

HOM

ESW

OUT

SW ,

INSW

DR

VSB

,TR

ACK_

S,FO

CUS_

S,SL

ED_S

SPI

ND

LE_S

VCR_

DATA

DVD

_R

ESET

MUT

E_C

CN60

2H

YPER

_TE

RM

INAL

MC

DV3

3

IC60

3H

Y57V

6416

20E

SDRA

M

MD

IC60

1ZR

3688

2ELC

GD

SP/M

PEG

/RF

+12

V

5V

RL

IC50

1M

N10

1DF1

0GVC

R M

ICO

M

DVD

_EN

A*D

VD_C

LKD

VD_D

ATA*

POW

ERBO

ARD

3.3V

33V

5.3V

A5.

0VM

5V/5

VT

PWR

_CTL

_H

Pb(B

)

Pr(R

)

Y(G)

IC80

1TD

A960

5HH

IFI

PICK

SEL

CN60

1D

OW

NLO

AD

5V

5V/R

EG12

V

IC60

7CS

5331

AKA

RAO

KE

AMCL

KAB

CLK

ALR

CLK

AIN

RL

MIIC

_DET

MIC

_IN

KAR

AOKE

OPT

ION

MEM

AD[00

:18

] FL

ASH

CS-

MEM

RD

-

MEM

WR-

MEM

DA[

0:14

]

RAM

ADD

[00:1

0]R

AMB

APC

LKR

SMCS

0R

AMR

AS#

RAM

CAS-

RAM

WE-

RAMDAT[00:15]RAMDQM

MO

TOR_

VCC

REG

_12

V

REG

_9V

8V

MUT

ECI

RCU

IT

MUT

E

A_L

+/-

A_R

+

/ -

3-77

IC20

1AM

5869

SM

otor

Dr i

ver

DVD

: A,B

,C,D

, RF

CD: A

,B,

C,D,

E,

F,

RF

MO

T_SP

DL

+/-

X601 IC

601

ZR36

882E

LCG

MPE

G /

DSP/

RF

FOCU

S_S,

TR

ACK_

S,SL

ED_

S, SP

IND

LE_S

,

SPDL

_ SEN

S +/

-FA

CT +

/-, TA

CT +

/-

SLED

+

/-

LOAD

+

/ -

27M

Hz

X-TA

L

DVD

_LD

, CD

_LD

, VR

_CD

, VR

_DVD

PICK

SEL

HO

MES

W,IN

SW,O

UTSW

DR

VSB

FLAS

HR

OM

FLAS

HCS

-M

EMR

D-

MEM

WR-

MEM

DA[

0:15

]

MEM

AD[0:

19]

EEPR

OM

SCL,

SD

A

CN60

1D

OW

NLO

ADR

XD, TX

D

M D

DIS

C

CD_M

D, D

VD_ M

D

OPE

N ,C

LOSE

2. SERVO BLOCK DIAGRAM

3-78

3. AUDIO & VIDEO IN/OUT BLOCK DIAGRAM

S/W

IC90

3B

H78

968F

S

IC60

1M

PEG

ZR36

882

IC60

5EE

PRO

MIC

801

HI-F

I

IC30

1AV

C P

V.IN

A.IN

_L

A.IN

_R

V.O

UT

A.O

UT_

LA.

OUT

_

R

Y

PbPr

COAX

IAL

DVD

_A_

LD

VD_A

_RO

PTIC

AL

Y C

A.O

UT_

RA.O

UT_

R

A.O

UT_

L

A.O

UT_

L

DVD

_A_

R

DVD

_A_

L

DVD_A_L

DVD_A_R

A.IN

_R

A.IN

_L

A.IN

_L

A.IN

_R

6

Y C

V_O

UT_1

Y C

EU1_

V_O

UT

Y / G

reen

Pb/ B

lue

Pr /

Red

V.IN

Y / G

reen

Pb/ B

lue

Pr /

Red

ASPD

IF

MUT

E_C

SCL

SDA

A_L+

/-IC

402

OP-

AMP

V_O

UT_2

A_R

+/-

V_IN

3-79 3-80


CIRCUIT DIAGRAMS1. SYSTEM CIRCUIT DIAGRAM

3-81 3-82

2. SERVO CIRCUIT DIAGRAM


3-83 3-84

3. AV/JACK CIRCUIT DIAGRAM


POSITION DRAWING OF DECKMECHANISM PARTS Top View......................................................4-1 Bottom View ...............................................4-1

DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM01.Disassembly of Drum assembly ................4-202.Disassembly of Plate top disassembly..... 4-403.Holder Assembly CST...............................4-404.Disassembly of Gear Assembly

Rack F/L....................................................4-405.Opener Door .............................................4-406.Arm Assembly F/L .....................................4-407.Lever Assembly S/W.................................4-408.Motor Assembly L/D..................................4-509.Gear Wheel ...............................................4-510.Arm Assembly Cleaner..............................4-511. Head F/E ...................................................4-512.Base Assembly A/C Head .........................4-513.Brake Assembly T .....................................4-614.Arm Assembly Tension..............................4-615.Reel S / Reel T..........................................4-616.Base Assembly P4 ....................................4-717.Opener Lid ................................................4-718.Arm Assembly Pinch .................................4-719.Arm T/up ...................................................4-720.Supporter, Capstan ...................................4-821.Belt Capstan/Motor Capstan.....................4-822.Lever F/R ..................................................4-823.Clutch Assembly D37................................4-824.Gear Drive/Gear Cam ...............................4-925.Gear Sector...............................................4-926.Brake Assembly Capstan..........................4-927.Plate Slider................................................4-928.Lever Tension............................................4-929.Lever Spring..............................................4-930. Lever Brake..............................................4-931.Gear Assembly P2/Gear Assembly P3 ...4-1032.Base Assembly P2/Base Assembly P3...4-1033.Base Loading ..........................................4-1034.Base Tension ...........................................4-1135.Arm Assembly Idler Jog ..........................4-11

DECK MECHANISM ADJUSTMENT Fixtures and tools for service ................4-121. Mechanism Assembly Mode Check ........4-132. Previous Preparation for

Deck Adjustment .....................................4-143. Torque Measuring ...................................4-144. Guide Roller Height Adjustment..............4-15

4-1. Prior Adjustment...............................4-154-2. Fine Adjustment ...............................4-15

5. Audio/Control (A/C) Head Adjustment......4-165-1. Prior Adjustment...............................4-165-2. Tape Path Check between Pinch

Roller and Take-up Guide ................4-175-3. Fine Adjustment

(Azimuth Adjustment).......................4-176. X-distance Adjustment ............................4-177. Adjustment after Drum Assembly

(Video Heads) .........................................4-188. Tachometer Adjustment of

Deck Assembly........................................4-188-1. Check of Audio, RF Normalization

Time (Locking Time) in Play after CUE or REV.....................................4-18

8-2. Check of Tape Curl and Jam Status .......................................4-18

PROTECTION, MAINTENANCE ANDCHECK OF VIDEO FUNCTION1. Checking Points before Repair ...............4-192. Essential Check and Repair....................4-203. Regular Check and Repair......................4-204. Tools for Check and Repair.....................4-205. Maintenance Process..............................4-20

5-1. Removal of Foreign Materials..........4-205-2. Grease Application...........................4-21

TROUBLESHOOTING GUIDE1. Deck Mechanism.....................................4-232. Front Loading Mechanism.......................4-26

EXPLODED VIEWS1. Front Loading Mechanism Section...........4-282. Moving Mechanism Section(1) .................4-293. Moving Mechanism Section(2) .................4-30

SECTION 4 MECHANISM OF VCR PART(D-37)CONTENTS

POSITION DRAWING OF DECK MECHANISM PARTS

4-1

5

4

3

2

6

9

108

12

1816

1917

13

15

111

33

14

7

15

35

Top View

Bottom View

21

21

24

23

22

3132

3132253428

27

29

20

2630

24

1 Drum Assembly 3 screws A-1 T2 Plate Top 2 hooks A-2 T

2 3 Holder Assembly CST 6 chasses A-2 T2,3 4 Gear Assembly Rack F/L 1 hook A-2 T2,3,4 5 Opener Door Chassis Hole A-2 T2,3,4,5 6 Arm Assembly F/L Chassis Hole A-2 T

7 Lever Assembly S/W Chassis Hole, A-2 T1 hook

8 Motor Assembly L/D 1 screw A-3 T9 Gear Wheel 2 hooks A-3 T10 Arm Assembly Cleaner Chassis Embossing A-3 T11 Head F/E Chassis Embossing A-3 T12 Base Assembly A/C Head 1 screw A-3 T

2,3 13 Brake Assembly T 1 hook A-4 T2,3 14 Arm Assembly Tension 1 hook A-4 T2,3,13,14 15 Reel S / Reel T Shaft A-4 T

16 Base Assembly P4 Chassis Embossing A-5 T17 Opener Lid Chassis Embossing A-5 T

17 18 Arm Assembly Pinch Shaft A-5 T17 19 Arm T/up 1 hook A-5 T

20 Supporter, capstan Chassis Hole A-6 B17,18 21 Belt Capstan/Motor Capstan 3 screws A-6 B

22 Lever F/R Locking Tab A-6 B21, 22 23 Clutch Assembly D37 Washer A-6 B

24 Gear Drive/Gear Cam Washer/Hook A-7 B25 Gear Sector Hook A-7 B

21 26 Brake Assembly Capstan Chassis Hole A-7 B21,22,23, 27 Plate Slider Chassis Guide A-7 B24,252621,22,23, 28 Lever Tension 1 Hook A7 B24,2526,2721,22,23, 29 Lever Spring 1 Hook A-7 B24,2526,2721,22,23, 30 Lever Brake 1 Hook A-7 B24,2526,2725 31 Gear Assembly P2/ Bass A-8 B

Gear Assembly P32, 3, 14, 32 Base Assembly P2 6 Chasses A-8 B25, 31 /Base Assembly P325, 31 33 Base Loading 3 Hooks A-8 B2,3,14 34 Base Tension Chassis Embossing A-9 T

35 Arm Assembly Idler Jog Locking Tab A-9 T

Parts firstly Disassembled

Order Of Dis-assembled Part Fixing Type

Ref.Draw-ings

Position

NOTE : Assembly order is a reverse of disassembly order.

(1) For assembly, check the assembly mode is accurate. (2) Parts firstly disassembled indicate parts firstly disassem-

bled in disassembly of related parts.

T:Top, B:Bottom

4-2

DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM

Cap, FPC

Drum Assembly

Cable Flat

(S1) (S1)

(S1)

Holder FPC

H1

H2

1. Disassembly of Drum Assembly(Figure A-1)

1) Separate cable flat from the Drum FPC and the CapstanMotor.

2) Release 3 screws (S1) on the bottom side of the chassis,and separate the drum assembly.

3) Release the hooks (H1, H2) and separate both the holderFPC and the Cap FPC (disassemble if necessary).

Fig. A-1

Cautions in assembly of FPC

Holder FPC

Drum FPC

Cap FPC

Assembly shape seen in the reverse direction


4-3

(B)

(E)

(C)

Plate Top

Arm Assembly F/L

Gear Assembly Rack F/L

Opener Door

Holder Assembly CST

(B')

(H3)

(A) (B)

Lever Assembly S/W

(H4)

(E)

Fig. A-2

(Fig. A-2-1)

(Fig. A-2-2)

(Fig. A-2-5)

(Fig. A-2-6)

(Fig. A-2-3)

(Fig. A-2-4)

2. Disassembly of Plate Top (Fig. A-2-1)1) Separate the right part while leaning back the (B) part of

the plate top toward the arrow direction.2) Separate the left part while leaning back the (B) part of

the plate top toward the arrow direction.(Tool used: Tool such as (-) driver, auger, etc with point-ed or flat end)

CAUTIONSAssemble while pressing the (C), (C) part after correspond-ing them as in drawing.

3. Holder Assembly CST (Fig. A-2-2)1) Firstly separate the left part from the groove on the (D)

part of chassis while moving the holder assembly CSTtoward the arrow direction.

2) Separate the right part from each groove of chassisCAUTIONS

Assemble by inserting the left part after firstly inserting the(E) part of the holder assembly CST into the groove on the(E) part of chassis.

4. Disassembly of Gear Assembly Rack F/L (Fig. A-2-3)

1) Separate the hook (H3) while leaning ahead the hook (3)after moving the gear assembly rack F/L toward the arrow(A) direction.

2) Separate the gear assembly rack F/L toward the arrow (B)direction.

CAUTIONSFor the assembly, correspond the gear part of gear assem-bly rack F/L to the gear drive.

5. Opener Door (Fig. A-2-4)1) Separate the opener door ahead from the guide hole of

chassis while turning it clockwise.

6. Arm Assembly F/L (Fig. A-2-5)1) Firstly separate the left part of the arm assembly F/L from

the groove of chassis while pushing the arm assembly F/Ltoward the arrow direction.

2) Separate the right part from the groove of chassis.).7. Lever Assembly S/W (Fig. A-2-6)1) Separate the lever assembly S/W while pushing it toward

the arrow direction after removing the hook (4) on the leftside of chassis.

4-4


(B')

(C')(C)

(B)

(D)

Holder Assembly CST Chassis

Chassis

(H4)

Gear Rack F/L

Gear Drive


4-5

8. Motor Assembly L/D (Fig. A-3-1)1) Take the connector (C1) connected to the Capstan motor

PCB out. 2) Remove a screw (S4) of the chassis (S4) and step back-

ward, and disassemble it while holding it up.

9. Gear Wheel (Fig. A-3-2)1) Release the hook (H5) of the gear wheel and disassemble

it upward.

10. Arm Assembly Cleaner (Fig. A-3-3) 1) Separate the (A) part of Fig. A-3-1 from the embossing of

chassis, and hold it up while turning it anti-clockwise.

11. Head F/E (Fig. A-3-4)1) Separate the (A) part of the head F/E from the emboss-

ing of chassis, and hold it up while turning it anti-clock-wise.

12. Base Assembly A/C Head (Fig. A-3-5)1) Release a screw (S5) and disassemble while holding it up.

Arm Assembly Cleaner

Motor Assembly L/D

Gear Wheel

Base Assembly A/C Head

(S4)

(S5)

Head F/E

(A)

(C1)

(H5)

(A)

Fig. A-3

(Fig. A-3-3)

(Fig. A-3-5)

(Fig. A-3-4)

(Fig. A-3-2)

(Fig. A-3-1)

4-6


Brake Assembly T

Reel T

Spring Tension

Arm Assembly Tension

Spring TensionReel S

(H7)

(H8)

(H6)

Fig. A-4

13. Brake Assembly T (Fig. A-4-1)1) Release the spring tension from the lever spring hook

(H6). 2) Disassemble the brake assembly T while holding it

upward.

14. Arm Assembly Tension (Fig. A-4-2)1) Release the spring tension the hook (H7) from the arm

assembly tension. 2) After releasing the hook (H8) of the base tension, sepa-

rate it while holding it up.

CAUTIONSSpring used for both brake assembly T and arm assemblytension is used (2EA used).

15. Reel S/Reel T (Fig. A-4-3) 1) Disassemble the reel S/ reel T while holding it up (com-

parison between Reel S and Reel T)

Reel S Reel T

(Fig. A-4-3)

(Fig. A-4-2)

(Fig. A-4-1)

(Fig. A-4-3)


4-7

Opener Lid

Arm Assembly Pinch

Base Assembly P4

Arm T/up(A)

(B)

(C)

Chassis

(C)

(H9)

Fig. A-5

16. Base Assembly P4 (Fig. A-5-1)1) Release the (A) part of the base assembly P4 from the

embossing of chassis.2) Hold the base assembly P4 up while turning it anti-clock-

wise.

17. Opener Lid (Fig. A-5-2)1) Release the (B) part of the opener lid from the embossing

of chassis.2) Disassemble the opener lid upward while turning it anti-

clockwise.

18. Arm Assembly Pinch (Fig. A-5-3) 1) Hold the arm assembly pinch up.19. Arm T/up (Fig. A-5-4)1) Turn the arm T/up to release the anchor jaw (H9) part of

chassis and then hold it upward.

CAUTIONSFor the assembly, check the (C) part of the arm assemblypinch is assembled as in drawing.

- REVERSE THE MECHANISM.

(Fig. A-5-2)

(Fig. A-5-1)

(Fig. A-5-3)

(Fig. A-5-4)

4-8


Chassis

(S6)

Belt Capstan

Motor Capstan

Washer(W1)

Lever F/R

Clutch Assembly D37

(L1) (L1)

Suppoter Capstan

Fig. A-6

20. Supporter, Capstan (Fig. A-6-1)1) Turn the supporter and Capstan by 90 deg. clockwise

with a driver for disassembly.

21. Belt Capstan (Fig. A-6-2) /Motor Capstan (Fig. A-6-3)

1) Separate the belt Capstan.2) Undo 3 screws (S6) on the bottom side of chassis and dis-

assemble it upward.

22. Lever F/R (Fig. A-6-4) 1) Release the locking tab (L1) and then disassemble it

upward.

23. Clutch Assembly D37 (Fig. A-6-5)1) Remove the washer (W1) and then disassemble it

upward.

(Fig. A-6-1)

(Fig. A-6-2)

(Fig. A-6-3)

(Fig. A-6-4)

(Fig. A-6-5)


4-9

Gear Drive

Washer (W2)

Gear Cam

Plate Slider

Lever Tension

Lever spring

Base Loading

Gear Sector

(B)

(A)

(H10)

(W2)

(L2)

(H11)

Chassis

Gear Cam Hole(C)

Gear Cam Hole(B)

Gear Drive Hole(A)

Brake Assembly Capstan

Lever Brack

Fig. A-7

24. Gear Drive (Fig. A-7-1)/Gear Cam (Fig. A-7-2)

1) Remove the washer (W2) and then disassemble thegear drive.

2) Release the hook (H10) of the gear cam and then disas-semble it upward.

CAUTIONSFor the assembly,

Documents

lg_lv280_v180_[ET]