HCD-EC68P_78P Manual de Servicio

8/9/2019 HCD-EC68P_78P Manual de Servicio

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SERVICE MANUAL

Sony CorporationAudio&Video Business Group

Published by Sony Techno Create Corporation

HCD-EC68P/EC78P

SPECIFICATIONS

COMPACT DISC RECEIVER

9-889-053-02

2009A05-1

2009.01

US ModelHCD-EC68P/EC78P

Canadian ModelUK Model

HCD-EC78P

Australian ModelHCD-EC68P

Ver. 1.1 2009.01

HCD-EC68P is the amplifier, CD player and

tuner section in MHC-EC68Pi.

HCD-EC78P is the amplifier, CD player and

tuner section in MHC-EC78Pi. Photo : HCD-EC78P

Model Name Using Similar MechanismCDM77B-K6BD90-WOD NEW

CDM88A-K6BD90-WOD HCD-EC68

Mechanism TypeExcept EC78P (UK) CDM77B-K6BD90-WOD

EC78P (UK) CDM88A-K6BD90-WOD

Base Unit Name BU-K6BD90-WOD

Optical Pick-up Block Name KSM-213DCP

Mainunit

AUDIO POWER SPECIFICAIONSPOWER OUPU AND OAL HARMONIC DISORION:

Low channelWith 8 ohm loads,both channels driven,from 120 10,000 Hz;60 wattsper channel minimum RMS power, withno morethan0.7% total harmonic distortion from 250 milliwatts to rated output.HighchannelWith 8 ohm loads, both channels driven, from 2,000 13,000 Hz;60 wattsper channel minimum RMS power, withno more than0.7% total harmonic distortion from 250 milliwatts to rated output.

AUDIO POWER SPECIFICAIONSPOWER OUPU AND OAL HARMONIC DISORION:

With 6 ohm loads,both channels driven,from 120 10,000 Hz;40 wattsper channel minimum RMS power, withno morethan0.7% total harmonic distortion from 250 milliwatts to rated output.

section

HCD-EC78P: US and Canadian modelsRMS output power (reference):

Low channel95 W + 95 W (per channel at 8 , 1 kHz, 10% HD)Highchannel95 W + 95 W (per channel at 8 , 8 kHz, 10% HD)

HCD-EC68PRMS output power (reference):

70 W + 70 W (per channel at 6 , 1 kHz, 10% HD)

Inputs

AUDIO IN (stereo mini jack):Sensitivity 800 mV, impedance 22 kilohms

OutputsPHONES (stereo mini jack):Acceptsheadphones withan impedanceof 8 or moreSPEAKER: impedanceHCD-EC78P: 8 HCD-EC68P: 6

CDplayersectionSystem: Compact disc and digital audio system

Laser:Semiconductor laser (=770 810 nm)Emission duration: continuousFrequencyresponse: 20 Hz 20 kHzSignal-to-noise ratio: More than 90 dBDynamic range: More than 88 dB

Tuner sectionFM stereo, FM/AM superheterodyne tunerAntenna:

FM lead antennaAM loop antenna

FM tuner section:

uning rangeNorth American model: 87.5 108.0 MHz (100 kHz step)UK and Australian models: 87.5 108.0 MHz (50 kHz step)Intermediate frequency: 10.7 MHz

AM tuner section:

uning rangeNorth Americanmodel:530 1,710 kHz (with 10 kHz tuning interval)531 1,710 kHz (with 9 kHz tuning interval)Australianmodel:

UKmodel:

531 1,710 kHz (with 9 kHz tuning interval)530 1,710 kHz (with 10 kHz tuning interval)Intermediate frequency: 450 kHz

General

Powerrequirements:North American model: AC 120 V, 60 Hz

UK model: AC 230 V, 50/60 Hz

UK model: 160 W

Australianmodel: AC 230 240 V, 50/60 Hz

Powerconsumption:

HCD-EC78PUSA model: 210 WCanadian model: 270 VA

HCD-EC68P110 W

Dimensions (w/h/d) (excl.speakers):

Approx. 200 306 415 mm

Mass (excl.speakers):

HCD-EC78P: US and Canadian modelsApprox. 5.8 kg

HCD-EC68PApprox. 4.7 kg

HCD-EC78P: UK modelPoweroutput (rated):

Low channel50 W + 50 W (at 8 , 1 kHz, 1% HD)Highchannel50 W + 50 W (at 8 , 8 kHz, 1% HD)

RMS output power (reference):Low channel70 W + 70 W (per channel at 8 , 1 kHz, 10% HD)Highchannel70 W + 70 W (per channel at 8 , 8 kHz, 10% HD)

531 1,602 kHz (with 9 kHz tuning interval)Intermediate frequency: 450 kHz

0.5 W (in Power Saving Mode)

HCD-EC78P: UK modelApprox. 6.1 kg

(HCD-EC78P Te United States model only)

(HCD-EC68P Te United States model only)


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HCD-EC68P/EC78P

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Notes on chip component replacement Never reuse a disconnected chip component.

Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

Flexible Circuit Board Repairing Keep the temperature of soldering iron around 270 C during

repairing. Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

Be careful not to apply force on the conductor when soldering

or unsoldering.

This appliance is

classified as a CLASS 1

LASER product. This

marking is located on the

rear exterior.

CAUTIONUse of controls or adjustments or performance of procedures other than

those specified herein may result in hazardous radiation exposure.

SAFETY-RELATED COMPONET WARNING!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINEWITH MARK 0ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTSWHOSE PART NUMBERS APPEAR AS SHOWN IN THISMANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT!

LES COMPOSANTS IDENTIFIS PAR UNE MARQUE0

SURLES DIAGRAMMES SCHMATIQUES ET LA LISTE DESPICES SONT CRITIQUES POUR LA SCURIT DE FONC-TIONNEMENT. NE REMPLACER CES COM- POSANTS QUEPAR DES PICES SONY DONT LES NUMROS SONT DON-NS DANS CE MANUEL OU DANS LES SUPPLMENTSPUBLIS PAR SONY.

SAFETY CHECK-OUTAfter correcting the original service problem, perform the follow-

ing safety check before releasing the set to the customer:

Check the antenna terminals, metal trim, metallized knobs,

screws, and all other exposed metal parts for AC leakage.

Check leakage as described below.

LEAKAGE TESTThe AC leakage from any exposed metal part to earth ground and

from all exposed metal parts to any exposed metal part having a

return to chassis, must not exceed 0.5 mA (500 microamperes.).

Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA

WT-540A. Follow the manufacturers instructions to use these

instruments.

2. A battery-operated AC milliammeter. The Data Precision 245

digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a

VOM or battery-operated AC voltmeter. The limit indication

is 0.75 V, so analog meters must have an accurate low-voltage

scale. The Simpson 250 and Sanwa SH-63Trd are examplesof a passive VOM that is suitable. Nearly all battery operated

digital multimeters that have a 2 V AC range are suitable. (See

Fig. A)

Fig. A. Using an AC voltmeter to check AC leakage.

1.5 k0.15 FACvoltmeter(0.75 V)

To Exposed MetalParts on Set

Earth Ground


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HCD-EC68P/EC78P

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1. SERVICING NOTES ............................................. 3

2. GENERAL.................................................................. 6

3. DISASSEMBLY3-1. Disassembly Flow ........................................................... 103-2. Side Panel (L)/(R) ........................................................... 11

3-3. Panel (Top) ...................................................................... 11

3-4. MAIN Board ................................................................... 12

3-5. Front Panel Block (EC78P: UK) .................................... 12

3-6. Front Panel Block (EC68P/EC78P: US, Canadian)........ 13

3-7. Back Panel Block ............................................................ 13

3-8. 3 CD Mechanism Block (EC78P: UK) ........................... 14

3-9. Base Unit (EC78P: UK) .................................................. 14

3-10. 1 CD Mechanism Block

(EC68P/EC78P: US, Canadian) ...................................... 15

3-11. Base Unit (EC68P/EC78P: US, Canadian) ..................... 15

3-12. Belt (EC68P/EC78P: US, Canadian) .............................. 16

3-13. Belt (EC78P: UK) ........................................................... 163-14. OP Base Assy (KSM-213D) ........................................... 17

4. TEST MODE ............................................................ 18

5. ELECTRICAL ADJUSTMENTS........................ 22

6. DIAGRAMS6-1. Block Diagram - CD SERVO, TUNER Section - ........... 25

6-2. Block Diagram - MAIN Section - ................................... 26

6-3. Printed Wiring Board - CD Board - ................................ 28

6-4. Schematic Diagram - CD Board - ................................... 29

6-5. Printed Wiring Boards - MAIN Section - ....................... 30

6-6. Schematic Diagram - MAIN Section (1/3) - ................... 31



6-9. Printed Wiring Board - HI AMP Board (EC78P) - ......... 34

6-10. Schematic Diagram - HI AMP Board (EC78P) - ............ 34

6-11. Printed Wiring Board - LOW AMP Board - ................... 35

6-12. Schematic Diagram - LOW AMP Board - ...................... 35

6-13. Printed Wiring Board - PANEL Board - ......................... 36

6-14. Schematic Diagram - PANEL Board - ............................ 37

6-15. Printed Wiring Boards - KEY Section - .......................... 38

6-16. Schematic Diagram - KEY Section - .............................. 38

6-17. Printed Wiring Board - MOTOR Board

(EC68P/EC78P: US, Canadian models) - ....................... 39

6-18. Schematic Diagram - MOTOR Board

(EC68P/EC78P: US, Canadian models) - ....................... 396-19. Printed Wiring Board - PT Board - ................................. 40

6-20. Schematic Diagram - PT Board - .................................... 41

7. EXPLODED VIEWS7-1. Panel Section................................................................... 47

7-2. Front Panel Section ......................................................... 48

7-3. Chassis Section ............................................................... 49

7-4. Main Section ................................................................... 50

7-5. 3 CD Mechanism Section (EC78P: UK)

(CDM88A-K6BD90-WOD) ........................................... 51

7-6. 1 CD Mechanism Section (Except EC78P: UK)

(CDM77B-K6BD90-WOD) ........................................... 52

8. ELECTRICAL PARTS LIST .............................. 53

TABLE OF CONTENTS

SECTION 1SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UPBLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostat-

ic break-down because of the potential difference generated by the

charged electrostatic load, etc. on clothing and the human body.

During repair, pay attention to electrostatic break-down and also

use the procedure in the printed matter which is included in the

repair parts.

The flexible board is easily damaged and should be handled with

care.

NOTES ON LASER DIODE EMISSION CHECKThe laser beam on this model is concentrated so as to be focused

on the disc reflective surface by the objective lens in the optical

pickup block. Therefore, when checking the laser diode emission,

observe from more than 30 cm away from the objective lens.

UNLEADED SOLDERBoards requiring use of unleaded solder are printed with the lead-

free mark (LF) indicating the solder contains no lead.(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARKUnleaded solder has the following characteristics.

Unleaded solder melts at a temperature about 40 C higher

than ordinary solder.

Ordinary soldering irons can be used but the iron tip has to be

applied to the solder joint for a slightly longer time.

Soldering irons using a temperature regulator should be set to

about 350 C.

Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful!

Strong viscosity Unleaded solder is more viscou-s (sticky, less prone to flow)

than ordinary solder so use caution not to let solder bridges

occur such as on IC pins, etc.

Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may

also be added to ordinary solder.

RELEASING THE DISC TRAY LOCKThe disc tray lock function for the antitheft of an demonstration

disc in the store is equipped.

Releasing Procedure:

1. Press [I/1] button to turn the power on.

2. Press the [FUNCTION] button to select CD function.3. While pressing the [x] button, press the [Z] button for more 5

seconds).

4. The message UNLOCKED is displayed and the disc tray is

unlocked.

Note: When LOCKED is displayed, the slot lock is not released byturning power on/off with the[I/1]button.


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HCD-EC68P/EC78P

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HOW TO REMOVE THE KNOB (VOL)

HOW TO OPEN THE TRAY WHEN POWER SWITCH TURN OFF

Turn a gear by a drivertill a lever falls down

to the position of the figure.

lever

gear

(EC78P: UK)

(EXCEPT EC78P: UK)

Pull the tray by the hand.

Slide the boss by a driver.

boss

knob (VOL)

hole

Push the knob (VOL) by the flat head driver.

front panel block

(back view)


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HCD-EC68P/EC78P

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CAPACITOR DISCHARGE FOR ELECTRIC SHOCK PREVENTION

MAIN board

MAIN board

C626

C622

In checking the MAIN board, make a capacitor discharge

of C622 and C626 for electric shock prevention.

800 /2W

800 /2W

Model Power Voltage Indication

EC68P: US/EC78P:

US and Canadian modelsAC 120 V, 60 Hz

EC68P: Australian model AC 230 - 240 V, 50/60 Hz

EC78P: UK model AC 230 V, 50/60 Hz

MODEL IDENTIFICATION

Back Panel

POWER

VOLTAGE

INDICATION


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HCD-EC68P/EC78P

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SECTION 2

GENERAL

This section is extracted

from instruction manual.

HCD-EC68P/EC78P: US and Canadian models :

Basic Operations Adjusting the sound

To adjust the volumePress VOLUME +/(or turnthe VOLUME control onthe unit).

To Press

Generate a moredynamic

sound (Dynamic SoundGenerator X-tra)

DSGX onthe unit.

EQ.

Playing a CD/MP3 disc

1 Select the CD function.

Press FUNCTION +/(or FUNCTIONon the unit) repeatedly.

2 Place a disc.

Press (open/close) onthe unit,and place a discwiththe label side upon the disc tray.

To close the disctray,press(open/close) ontheunit.

thismay damage the unit.

3 Start playback.

Press(play).

To Press

Pauseplayback (pause). Toresume play,press thebutton again.

Stop playback (stop).

Select a folderon anMP3 disc

+/(selectfolder) .

/(goback/goforward)(or/ onthe unit).

Find a point in a Hold down/(rewind/fastforward) during playback,andreleasethe buttonat the desiredpoint.

Selec tRepeatPlay REPEAT repeatedly untilREP or REP1 appears.

To change the play modePress PLAY MODE repeatedly whiletheplayerisstopped.Youcan selectnormal play (no display or

(SHUFor play (PGM).*Whenplaying a CD-DA disc, (SHUF)Playperformsthesame

operationas normal (SHUF)Play.

Notes on Repeat Play

it.

Notes on playing MP3 discs

the disc.

.MP3.

malfunction.

foldersis 150 (includingthe root folder).

device,and recordingmedia cannot be guaranteed. IncompatibleMP3 discsmay producenoiseor interruptedaudioor maynotplayatall.

Notes on playing multisession discs If the disc beginswith a CD-DA (or MP3) session,it is recognized

as a CD-DA (or MP3) disc, and playback continues untilanothersessionis encountered.

A discwith a mixed CD format is recognizedas a CD-DA (audio)disc.

Listening to the radio

1 SelectTUNER FMorTUNERAM.


2 Select the tuning mode.

Press TUNINGMODE repeatedly until AUTOappears.

3 Tune in the desired station.

Press +/(or TUNING +/ on the unit).Scanning stops automatically when a station is tunedin,and thenTUNED andST(for stereo programs)appear.

To stop automatic scanningPress(stop).

To tune in a station with a weak signalIfTUNED doesnot appear andthe scanning doesnotstop,press TUNINGMODE repeatedly untilMANUAL appears, and then press +/(or TUNING+/ on the unit) repeatedlyto tune in the desiredstation.

Toreduce static noise on a weak FM stereostationPress FM MODE repeatedly until MONO appears

Changing the display

To Press

Changeinformationonthe display*

DISPLAY repeatedly whenthesystem is turnedon.

Change Displaymode (See below.)

DISPLAY repeatedly whenthe

* For example,you can view CD/MP3 disc information,such as;

)duringnormalplay.

artistname ( )duringnormalplay.

albumorfoldername ( )duringnormalplay.

total playingtimewhilethe playeris stopped.

Display mode

Power SavingMode1)

to operate.

Clock2)

1) Youcannot setthe clock in Power SavingMode.2)

eightseconds.

Notes on the display informationCharactersthat cannot be displayedappear as _.

total playingtimefor an MP3 disc.

bit rate).

1,Level 2 orJoliet in the expansionformat.

totalplaying timefor a CD-DA disc duringnormal play.

remainingplaying timefor a track.

version2 tagsare used (ID3 version 2 tag information displayhasprioritywhen both ID3 version 1 andversion 2 tagsare used for a

upto 15 characters of ID3 tag information usinguppercase letters(A to Z), numbers (0 to 9), and symbols (< > * + , / @ [ \ ] _).

remote,but thesame operationscan alsobe performedusingthe buttonson the unithavingthe sameor similarnames.

Before using the system

To use the remoteSlide and removethe battery compartment lid, andinsert the two R6 (size AA) batteries (supplied),side

Notes on using the remoteWith normal use,thebatteriesshouldlastfor about six months.

batteries. Ifyou do notusethe remotefor a longperiodof time, removethe

batteriesto avoiddamage from battery leakageand corrosion.Batteries installed devices shall not be exposed to excessiveheat such

To set the clock

1 Turn on the system.

Press (on/standby) to turnon the system.2 Select the clock set mode.

Press TIMER MENU/ repeatedlyto

select CLOCK, andthen press (enter).

3 Set the time.

Press/ repeatedly to setthe hour, thenpress(enter)

Usethe sameprocedureto setthe minutes.

Note

power failure occurs.

Using optional audio components

Toconnect an optional headphonesConnectheadphonesto thePHONESjack ontheunit.

Toconnect an optional componentConnect additionalaudio source components to theAUDIO IN jack onthe unitusing an analog audiocord (notsupplied).Turn downthe volumeon thesystem,and thenselectthe AUDIO IN function.

Toconnect a DIGITAL MEDIA PORT adaptorConnectthe DIGITAL MEDIA PORT adaptor to theDMPORT onthe unit.Youneed to connecttheDIGITAL MEDIA PORT adaptor to an optional audiodevice (portable audio player, etc.).

Notes on DIGITAL MEDIA PORT adaptorAvailableDIGITAL MEDIA PORT adaptors vary in each area.Do not connect an adaptorother than theDIGITAL MEDIA PORT

adaptor.

Do not connector disconnect the DIGITAL MEDIA PORT adaptorto/fromthe DMPORTwhilethe systemis on.

Whenusing a DIGITAL MEDIA PORT adaptor thathas videooutputfunction, connectthe adaptor directlyto theTV.

For detailsabout the DIGITAL MEDIA PORT adaptor, referto theoperating instructions suppliedwith yourDIGITAL MEDIA PORTadaptor.


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HCD-EC68P/EC78P

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Creating yourown CD program(Program Play)Usebuttons onthe remote to createyour ownprogram.

1 Press FUNCTION +/ repeatedly to select the CDfunction.

2 Press PLAY MODE repeatedly untilPGM appears

while the player is stopped.

3 Press/ repeatedly until the desiredtrack number appears.

+/ repeatedly toselect the desiredfolder, andthen select

Total playing time of the

selected track

4 Press

5 Repeat steps 3 through 5 to program additional

6 .

tray. Toplaythe sameprogramagain,selectthe CDfunction, andthen press.

Tocancel Program PlayPress PLAY MODE repeatedly untilPGMdisappears whiletheplayeris stopped.

Press CLEAR whiletheplayeris stopped.

To view program information, such as totaltrack number of the programPress DISPLAY repeatedly.

Presetting radio stationsYou can preset your favorite radio stationsand tunethem in instantly by selecting the correspondingpresetnumber.

1 Tune in the desired station (SeeListening to theradio).

2 Press TUNER MEMORY.Preset number

3 Press +/(or TUNING +/on the unit)repeatedly to selectyour desired preset number.

Ifanotherstationis alreadyassignedto theselectedpreset number, thestationis replacedby thenewstations.

4 Press .

5 Repeat steps 1 through 4 to store other stations.

preset stationsare retainedfor about half a day evenif you disconnect the power cord or if a power failureoccurs.

6 To call up a preset radio station, press TUNINGMODE repeatedly untilPRESETappears, andthen press +/(or TUNING +/on the unit)repeatedly to select the desired preset number.

Other Operations Using the timers

timers,the SleepTimerhas priority.

Usebuttonson theremoteto usethe timer functions.

SleepTimer:

theclockis notset.Press SLEEP repeatedly. If you select AUTO, the

or in 100 minutes.

PlayTimer:Youcan wakeup to CD ortunerat a presettime.

Makesureyou have setthe clock.

1 Prepare the sound source.

Press VOLUME +/ to adjustthe volume.

your own CD program.

2 Press TIMER MENU.

3 Press / repeatedly to selectPLAY SET,thenpress .

4 Set the time to start playback.

Press / repeatedly to set the hour, then press.

above toset the minutes.

5 Use the same procedure as in step 4 to set the timeto stop playback.

6 Select the sound source.

Press/ repeatedly untilthe sound sourceyouwant appears,and thenpress shows thetimer settings.

7 Press

Ifthe systemis onat thepresettime, thePlay Timerwillnot play.

To activate or check the timer again

1 Press TIMER MENU.

2 Press .

3 Press / repeatedly to selectPLAY SEL,thenpress .

Tocancel the timerRepeat thesame procedureas above untilOFF appearsin step 3, andthen press .

To change the settingStartoverfrom step 1.

Tip

manually.

Troubleshooting

1 Make sure the powercord and speaker cords are

2 Find your problem in the checklist below, and takethe indicatedcorrective action.

Ifthe issuepersists, contactyour nearestSony dealer.

If PROTECT appears on the displayImmediately unplugthe power cord,and checkthe

Are the + and speaker cords short-circuited?

Is anythingblocking theventilationholeson thetopor backof the system?

to beall right, reconnect thepower cord, andturn onthe system. If theissue persists, contact your nearestSony dealer.

General

The system does not turn on. Is thepower cordplugged in?

There is no sound. Are the + and speaker cords short-circuited?

Areyou usingonlythe suppliedspeakers?

Is anythingblocking theventilationholeson thetop orbackof the system?

Sound comes from one channel, or the left andrightvolumes are unbalanced. Place thespeakersas symmetricallyas possible.

Connectonly thesupplied speakers.

Severe hum or noise. Move the system away fromsources ofnoise.

cord.

The remote does not function. Removeany obstacles betweenthe remoteand the

remotesensor onthe unit,and positionthe unit

Point theremoteat the systems sensor.

Move theremotecloserto the system.

CD/MP3 player

The sound skips, or the disc will not play. Wipethe disc clean, andreplaceit.

Movethe systemto a locationaway from vibration (forexample,on topof a stablestand).

Move thespeakersawayfrom the system,or placethemonseparatestands.At highvolume, speaker vibrationmaycausethe sound toskip.

Return to Normal Playby pressingPLAYMODErepeatedly until both PGMand SHUF disappear.

Starting playback takes more time than usual.

a discrecorded with a complicated tree structure.

a disc recorded in multisessionmode.

can be added).

a discthathas manyfolders.

The disc tray does not open and LOCKEDappears. Contactyour Sony dealeror local authorizedSony

service facility.

Tuner

Severe hum or noise, or stations cannot be

display.) Connectthe antenna properly.

Find a location andan orientation thatprovide goodreception, andthen setup theantennaagain.

Keep theantennas away fromthe speaker cords andthe

power cordto avoid picking upnoise.

To change the AM tuning interval

10 kHz.Usebuttonson the unitto changethe AM tuninginterval.

1

system.

2 Press DISPLAY to display the clock.

3 While holding downTUNING +, press .Allthe AM presetstations are erased.To reset theintervalto the factory preset,repeatthe procedure.

To improve tuner reception

management function. By default, CD power is turnedon.

1 Press FUNCTION +/(or FUNCTION on the unit)repeatedly to select the CD function.

2 Press

3 to display the clock, and then press whileholding down.CD POWER OFF appears. With CD player power

CDplayerpower,repeatthe procedure until CDPOWER ONappears.

To reset the systemto factory settingsIfthe systemstill does notoperateproperly, reset thesystem to factory settings.Usebuttonson the unitto resetthe unit to its factorydefaultsettings.

1 Disconnect and reconnect the power cord, and thenturn on the system.

2 Press, FUNCTION, and at the sametime.

stations,timer, andthe clock, are deleted.

Messages

CANNOTLOCK :youhave done theprocedureof Whencarrying thissystem.

COMPLETE :

FULL :(steps).

LOCKED :nearest Sony dealer.

NO DISC :loaded a disc thatcannotbe played.

NO STEP : Allof theprogrammedtrackshave beenerased.

OVER : Youhave reachedthe endof the discwhilepressing during playbackor pause.

PUSH STOP : You pressed PLAYMODE duringplayback.

PROTECT :

Speaker cords may be short-circuited.

SeeIf PROTECTappears on the display to checkwhat to do if this message appears.

READING :disc. Somebuttons arenot available.

TIME NG :thesame time.


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HCD-EC68P/EC78P

8

HCD-EC78P: UK model:

Basic Operations Adjusting the sound

To adjust the volumePress VOLUME +/(or turnthe VOLUME control onthe unit).

To Press

Generate a moredynamic

sound (Dynamic SoundGenerator X-tra)

DSGX on the unit.

EQ.

Playing a CD/MP3 disc

1 Select the CD function.


2 Place a disc.

Press(open/close) on the unit,and place adiscwith thelabel side upon the disc tray. To place

shown below.

Toclosethe disc tray, press(open/close) ontheunit.

thismay damagethe unit.

3 Select a disc.

Ifthe discsare currentlystopped, press DISCSKIP.Tochange discswhile in other functions,pressDISC 1 3 onthe unit.

4 Start playback.

Press(play).To exchangeother discs during playback,pressEX-CHANGE onthe unit.

To Press

Pauseplayback (pause). Toresume play,press thebuttonagain.

Stop playback (stop).

Select a folderon anMP3 disc

+/(selectfolder) .

/

(goback/goforward)(or/ on the unit).

Find a point in a Hold down/(rewind/fastforward) during playback, andreleasethe buttonat the desiredpoint.

Select Repeat Play REPEAT repeatedly untilREP orREP1appears.

To change the play modePress PLAY MODE repeatedly whilethe player isstopped.Youcan select normal play (no displayfor alldiscsor 1 DISC for a disc or

or (PGM).*Whenplaying a CD-DA disc, (SHUF)Playperformsthesame

operationas 1 DISC (SHUF) Play.

Notes on Repeat Play

time.

it.

Notes on playing MP3 discs

the disc.

.MP3.

malfunction.

foldersis 150 (includingthe root folder).

device,and recordingmedia cannot be guaranteed.IncompatibleMP3 discsmay producenoiseor interruptedaudioor maynotplayatall.

Notes on playing multisession discs If the discbegins with a CD-DA (or MP3) session,it is recognized

as a CD-DA (or MP3) disc, and playback continues untilanothersessionis encountered.

A discwith a mixed CD format is recognizedas a CD-DA (audio)disc.

Listening to the radio

1 SelectTUNERFMorTUNER AM.


2 Select the tuning mode.

Press TUNINGMODE repeatedly until AUTOappears.

3 Tune in the desired station.

Press +/(or TUNING +/on the unit).Scanningstops automaticallywhen a stationis tunedin,and thenTUNED andST (for stereoprograms)appear.

To stop automatic scanningPress(stop).

To tune in a station with a weak s ignalIf TUNED does notappearand thescanning doesnotstop,press TUNINGMODE repeatedly untilMANUAL appears, and then press +/(or TUNING+/ on the unit) repeatedlyto tune in the desiredstation.

Toreduce static noise on a weak FM stereostationPress FM MODE repeatedly until MONO appears

Changing the display

To Press

Changeinformationonthe display*

DISPLAY repeatedly whenthesystemis turned on.

Change Displaymode (See below.)

DISPLAY repeatedly whenthe

* For example,you can view CD/MP3 disc information,such as;

)duringnormalplay.

artistname ( )duringnormalplay.

albumorfoldername ( )duringnormalplay.

totalplayingtimewhilethe playeris stopped.

Display mode

Power SavingMode1)

to operate.

Clock2)

1) Youcannot set theclock in Power SavingMode.2)

eightseconds.

Notes on the display informationCharactersthat cannot be displayedappearas _.

totalplayingtimefor an MP3 disc.

bit rate).

1,Level 2 orJoliet in the expansionformat.

total playingtimefor a CD-DA discwhenthe playmodeis1 DISC.

remainingplaying timefor a track.

version2 tagsare used (ID3 version 2 tag information displayhasprioritywhen both ID3 version 1 and version 2 tagsare usedfor a

up to 15 characters of ID3 tag informationusing uppercase letters(A to Z), numbers (0 to 9), and symbols (< > * + , / @ [ \ ] _).

remote,but thesame operations canalso be performedusingthe buttonson the unithavingthe sameor similarnames.

Before using the system

To use the remoteSlide and removethe battery compartment lid, andinsert the two R6 (size AA) batteries (supplied),side

Notes on using the remoteWith normaluse, thebatteriesshould lastforabout six months.

batteries. Ifyou do notusethe remotefor a longperiodof time, removethe

batteriesto avoiddamage from battery leakageand corrosion.

Batteries installed devicesshall not be exposed to excessiveheat such

To set the clock

1 Turn on the system.

Press (on/standby) toturn onthe system.

2 Select the clock set mode.

Press TIMER MENU/ repeatedlyto

selectCLOCK, andthen press (enter).

3 Set the time.

Press/ repeatedly toset thehour,then press(enter)

Usethe sameprocedureto setthe minutes.

Note

power failure occurs.

Using optional audio components

Toconnect an optional headphonesConnect headphonesto thePHONESjack ontheunit.

Toconnect an optional componentConnect additionalaudio source components to theAUDIO IN jack on the unitusingan analog audiocord (notsupplied).Turn down thevolumeon thesystem, andthen select theAUDIO IN function.

Toconnect a DIGITAL MEDIA PORT adaptorConnect the DIGITAL MEDIA PORT adaptor to theDMPORT on the unit. Youneed to connecttheDIGITAL MEDIA PORT adaptor to an optionalaudiodevice (portableaudio player, etc.).

Notes on DIGITAL MEDIA PORT adaptorAvailableDIGITAL MEDIA PORT adaptors vary in eacharea.

Do not connect an adaptorother than the DIGITAL MEDIA PORTadaptor.

Do not connector disconnect the DIGITAL MEDIA PORT adaptorto/fromthe DMPORTwhilethe system ison.

Whenusing a DIGITAL MEDIA PORT adaptorthat has videooutputfunction, connectthe adaptor directlyto the TV.

For details aboutthe DIGITAL MEDIA PORT adaptor,refer to theoperating instructionssupplied withyour DIGITAL MEDIA PORTadaptor.


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HCD-EC68P/EC78P

9

Creating your own CD program(Program Play)Usebuttons on theremoteto createyour ownprogram.

1 Press FUNCTION +/(or FUNCTION on the unit)repeatedly to select the CD function.

2 Press PLAY MODE repeatedly untilPGM appears

while the player is stopped.3 Press DISC SKIP to select a disc.

4 Press/(or/on the unit)repeatedly until the desired track number appears.

+/ repeatedly to select the desiredfolder, andthen select

Total playing time of the

selected track

5 Press

6 Repeat steps 3 through 5 to program additional

7 .

tray. Toplaythe sameprogramagain,selectthe CD

function,and thenpress.

Tocancel Program PlayPress PLAY MODE repeatedly untilPGMdisappearswhilethe player is stopped.

Press CLEAR whilethe player is stopped.

To view program information, such as totaltrack number of the programPress DISPLAY repeatedly.

Presetting radio stationsYou can preset your favorite radio stations and tunethem in instantly by selecting the correspondingpresetnumber.

1 Tune in the desired station (SeeListening to theradio).

2 Press TUNER MEMORY.Preset number

3 Press +/(or TUNING +/on the unit)repeatedly to selectyour desired preset number.

Ifanotherstationis alreadyassignedto theselectedpreset number,the stationis replacedby thenewstations.

4 Press .

5 Repeat steps 1 through 4 to store other stations.

preset stationsare retainedfor about half a dayevenif you disconnect the power cord or if a power failureoccurs.

6 To call up a preset radio station, press TUNINGMODE repeatedly untilPRESETappears, andthen press +/(or TUNING +/on the unit)repeatedly to select the desired preset number.

Other Operations Using the timers

timers, theSleep Timer haspriority.

Usebuttons on theremoteto usethe timer functions.

SleepTimer:

theclockis not set.Press SLEEP repeatedly. If you select AUTO, the

or in 100 minutes.

PlayTimer:Youcan wakeup to CD or tuner at a presettime.

Makesureyou have setthe clock.

1 Prepare the sound source.

Press VOLUME +/ (or turnVOLUMEon the unit) to adjustthe volume.

your own CD program.

2 Press TIMER MENU.

3 Press / repeatedly to selectPLAY SET,thenpress .

4 Set the time to start playback.

Press / repeatedly to set the hour, then press.

above to setthe minutes.

5 Use the same procedure as in step 4 to set the timeto stop playback.

6 Select the sound source.

Press/ repeatedly untilthe sound sourceyouwantappears, andthen press shows thetimer settings.

7 Press

Ifthe system ison atthepreset time,thePlayTimerwillnot play.

To activate or check the timer again

1 Press TIMER MENU.

2 Press .

3 Press / repeatedly to selectPLAY SEL,andthen press .

Tocancel the timerRepeat thesame procedure as above untilOFF appearsin step 3, andthen press .

To change the settingStartoverfrom step 1.

Tip

manually.

Troubleshooting

1 Make sure the powercord and speaker cords are

2 Find your problem in the checklist below, and takethe indicatedcorrective action.

Ifthe issuepersists, contactyour nearestSony dealer.

If PROTECT appears on the displayImmediately unplugthe power cord,and checkthe

Are the + and speaker cords short-circuited?

Isanythingblocking theventilationholeson thetoporback ofthe system?

to beall right, reconnectthe power cord, andturn onthe system. Ifthe issuepersists, contactyournearestSony dealer.

General

The system does not turn on. Is thepower cordplugged in?

There is no sound. Are the + and speaker cords short-circuited?

Areyou usingonlythe suppliedspeakers?

Is anythingblocking theventilationholeson thetop orbackof the system?

Sound comes from one channel, or the left andrightvolumes are unbalanced. Place thespeakersas symmetricallyas possible.

Connect onlythe suppliedspeakers.

Severe hum or noise. Move the system away fromsources ofnoise.

cord.

The remote does not function. Removeany obstacles betweenthe remoteand the

remotesensor onthe unit,and positionthe unit

Point theremoteat the systemssensor.

Move theremotecloserto the system.

CD/MP3 player

The sound skips, or the disc will not play. Wipethe disc clean, andreplaceit.

Movethe systemto a locationaway from vibration (forexample,on topof a stable stand).

Move thespeakersawayfrom the system,or placethemon separatestands.At highvolume, speaker vibrationmaycausethe sound to skip.

Return to Normal Playby pressingPLAYMODErepeatedly until both PGMand SHUF disappear.

Starting playback takes more time than usual.

a discrecorded with a complicated tree structure.

a disc recorded in multisessionmode.

can be added).

a discthathas many folders.

The disc tray does not open and LOCKEDappears. Contactyour Sony dealeror local authorizedSony

service facility.

Tuner

Severe hum or noise, or stations cannot be

display.) Connect the antennaproperly.

Find a location andan orientation thatprovide goodreception, andthen setup theantennaagain.

Keep theantennas away fromthe speaker cords andthe

power cordto avoid picking upnoise.

To change the AM tuning interval

10 kHz.Usebuttons on the unit to change the AM tuninginterval.

1

system.

2 Press DISPLAY to display the clock.

3 While holding downTUNING +, press .Allthe AM presetstations are erased. To resettheintervalto the factory preset, repeat theprocedure.

To improve tuner reception

management function.By default, CD power is turnedon.

1 Press FUNCTION +/ (or FUNCTION on the unit)repeatedly to select the CD function.

2 Press

3 to display the clock, and then press whileholding down.CD POWEROFF appears. With CD player power

CDplayerpower,repeatthe procedure until CDPOWER ONappears.

To reset the systemto factory settingsIfthe systemstill does notoperateproperly, reset thesystem to factory settings.Usebuttons onthe unitto reset the unitto its factorydefaultsettings.

1 Disconnect and reconnect the powercord, and thenturn on the system.

2 Press, FUNCTION, and at the sametime.

stations,timer, andthe clock, are deleted.

Messages

CANNOTLOCK :youhave donetheprocedureof When carrying thissystem.

COMPLETE :

FULL :(steps).

LOCKED :nearest Sony dealer.

NO DISC :loaded a disc thatcannotbe played.

NO STEP : Allof theprogrammedtrackshave beenerased.

OVER : Youhave reachedthe endof the discwhilepressing during playbackor pause.

PUSH STOP : You pressed PLAYMODE during

playback.PROTECT :

Speaker cordsmay be short-circuited.

SeeIf PROTECT appearson the display to checkwhatto do if thismessageappears.

READING :disc.Somebuttons arenot available.

TIME NG :thesame time.


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HCD-EC68P/EC78P

10

SECTION 3

DISASSEMBLY

This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

3-2. SIDE PANEL (L)/(R)

(Page 11)

3-3. PANEL (TOP)

(Page 11)

3-5. FRONT PANEL

BLOCK (EC78P: UK)

(Page 12)

(EC78P: UK)

3-6. FRONT PANEL BLOCK

(EC68P/EC78P: US, Canadian)

(Page 13)


3-10. 1 CD MECHANISM BLOCK


(Page 15)

3-11. BASE UNIT


(Page 15)

3-12. BELT

(EC68P/EC78P: US, Canadian) (Page 16)

3-13. BELT

(EC78P: UK)

(Page 16)

3-14. OP BASE ASSY

(KSM-213D)

(Page 17)

3-4. MAIN BOARD

(Page 12)

3-7. BACK PANEL

BLOCK

(Page 13)

3-8. 3 CD MECHANISM BLOCK

(EC78P: UK)

(Page 14)

3-14. OP BASE ASSY (KSM-213D)

(Page 17)

3-9. BASE UNIT (EC78P: UK)

(Page 14)

SET


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HCD-EC68P/EC78P

11

Note: Follow the disassembly procedure in the numerical order given.

3-2. SIDE PANEL (L)/(R)

3-3. PANEL (TOP)

two screws (BVTP3 10)

two screws (BVTP3 10)four screws

(case3 TP)

side panel (L)

side panel (R)

four screws (case3 TP)

panel (top)

two claws



screw (KTP3 10)

screw (KTP3 10)


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HCD-EC68P/EC78P

12

two screws (BVTP3 10) (EC78P)


connector (CN601)

connector (CN633)

flexible flat cable (5 core) (CN603)

flexible flat cable (5 core) (CN602) (EC78P)

connector (CN151) (EC78P)MAIN board


screw (BVTP3 10)




connector (CN604)


3-4. MAIN BOARD


flexible flat cable(9 core) (CN605)


Turn a gear by a drivertill a lever falls down

to the position of the figure.

pull the tray by hand.

lever

gear



door (CD)

front panel block

3-5. FRONT PANEL BLOCK (EC78P: UK)


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HCD-EC68P/EC78P

13

3-6. FRONT PANEL BLOCK (EC68P/EC78P: US, Canadian)





Sl ide the boss by a driver.pull the tray by hand.

flexible flat cable (31 core)

(CN803)

door (1 CD)

front panel block

boss

3-7. BACK PANEL BLOCK

four screws

(BVTP3

10)


screw (BVTP3 10)

connector (power cord) (CN053)

connector (CN601)

back panel block

Cut the clamp.


two screws (BVTP3 10) (EC78)

Note:Please do not forget fixation by clamping

when you install the power cord.


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HCD-EC68P/EC78P

14

3-8. 3 CD MECHANISM BLOCK (EC78P: UK)

3-9. BASE UNIT (EC78P: UK)

four screws (BVTP3 10)

two tapes

flexible flat cable(21 core)

(MAIN board: CN608/

CD board: CN201)

flexible flat cable(13 core)

3 CD mechanism block

cover (DLM3)

two screws (BVWH)

Note: When installing the CD mechanism section,

install two tapes for prevention of noise.

insulator

insulator

base unit insulator

insulator

two springs(insulator)

two screws (PTPWHM2.6)

two screws (PTPWHM2.6)

Bottom view

two springs (insulator)



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HCD-EC68P/EC78P

15

3-10. 1 CD MECHANISM BLOCK (EC68P/EC78P: US, Canadian)

3-11. BASE UNIT (EC68P/EC78P: US, Canadian)

three screws (BVTP3 10)





PT block


connector (CN053)

insulator

insulator

base unit insulator

insulator

two springs(insulator)

two floating screws

two floating screws

floating screw

loading (BK) assy

Bottom view

two springs (insulator)


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HCD-EC68P/EC78P

16

3-12. BELT (EC68P/EC78P: US, Canadian)

3-13. BELT (EC78P: UK)

belt

claw

claw

tray (AU)

belt

position of belt

four screws

cover

two belts (DLM3A)

belt

belt

position of belt


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HCD-EC68P/EC78P

17

3-14. OP BASE ASSY (KSM-213D)

op base assy (KSM-213D)

flexible flat cable (16 core)(CN301)

CD board

Remove four solders.


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HCD-EC68P/EC78P

18

SECTION 4

TEST MODE

COLD RESETThe cold reset clears all data including preset data stored in the

memory to initial conditions. Execute this mode when returning

the set to the customer.

Procedure:

1. In the standby status, press the [I/1] button to turn the power

on.

2. Press three buttons of [x], [FUNCTION] and at last [I/1] si-

multaneously.

3. When RESET appears, the set enters standby status.

PANEL TEST MODEEnter The Panel Test Mode

Procedure:

1. In the standby status, press the [I/1] button to turn the power

on.

2. Press three buttons of [DISPLAY], [x], and [FUNCTION] si-

multaneously.

3. When the panel test mode is activated, LEDs and segments of

the liquid crystal display are all turned on.

Version Check

Procedure:

1. In the panel test mode (all LEDs and segments of the liquid

crystal display are turned on), press the [FUNCTION] button.

2. On the liquid crystal display, date and version are displayed

xxxxxxxx. For example, 1114V102.

3. From this status, press the [X] button, and the destination and

model name are displayed. For example, CE2 and ESLO.

4. To release from this mode, press three buttons of [DISPLAY],

[x], and [FUNCTION] simultaneously.

Key Test Mode

Procedure:

1. In the panel test mode (all LEDs and segments of the liquid

crystal display are turned on), press the [DISPLAY] button.

2. The message KEY0 0 0displayed. Whenever any buttons

are pressed and the [VOLUME] dial is turned, the value is

changed.

3. To release from this mode, press three buttons of [DISPLAY],

[x], and [FUNCTION] simultaneously.

CD REPEAT 5 LIMIT CANCEL MODENumber of repeats for CD playback is 5 times when the repeat

mode is REPEAT. This mode enables CD to repeat playback for

limitless times.

Procedure:

1. Press the [I/1] button to turn the power on.2. Press the [FUNCTION] button to select CD function.

3. Press three buttons of [DISPLAY], [x], and [l m TUN-

ING] simultaneously.

4. It enters the CD repeat 5 limit cancel mode and displays NO

LIMIT

5. To release this mode, press the [I/1] button to turn the power off.

CD SHIP MODEThis mode can run the CD sled motor optionally. Use this mode,

for instance, when cleaning the optical pick-up.

Procedure:

1. Press the [I/1] button to turn the power on.

2. Confirm there is no disc in all trays.

3. Press the [FUNCTION] button to select CD function.4. Press two buttons of [CDN] and [I/1] simultaneously.5. Set to the CD ship mode. (chucking on)

6. After blink STANDBY, LOCK is displayed, disconnect

the AC plug.

CD TRAY LOCKThis mode is for the antitheft of CD disc in shop. (not for trans-

port)

Procedure:


2. Press the [FUNCTION] button to select CD function.

3. Insert a disc.

4. While pressing the [x] button, press the [Z] button for more 5

seconds.

5. The message LOCKED is displayed and the disc tray is

locked. (Even if exiting from this mode, the disc tray is still

locked)

6. If press the [Z] button to eject the disc, the message LOCKED

is displayed and can not eject the disc.

7. To release this lock, while pressing the [x] button, press the

[Z] button for 5 seconds again.

8. The message UNLOCKED is displayed and the disc tray is

unlocked.

CD POWER MANAGE

This mode is for switch the CD power supply on/off. Even if thisstate pulls out AC plug, it is held.

Procedure:



3. Press the [I/1] button again to turn the power off (standby).

4. After pressing the [DISPLAY] button, while pressing the [x]

button, press the [I/1] button.

5. It turns power on and display CD POWER, then display

ON or OFF.

CHANGE-OVER THE AM TUNING INTERVAL(Except EC78P: UK model)

The AM tuning interval can be changed over 9 kHz or 10 kHz.

Procedure:1. Press the [I/1] button to turn the power on.

2. Press the [TUNER/BAND] button to select TUNER (AM)

function.

3. Press the [I/1] button again to turn the power off (standby).

4. After pressing the [DISPLAY] button, while pressing the

[TUNING + M L] button, press the [I/1] button.

5. It turns power on and display 9k STEP or 10k STEP, and

thus the tuning interval is changed over.

CD SHIP AND COLD RESETProcedure:


2. Confirm there is no disc in all trays.


4. Press three buttons of [PLAY MODE/TUNING MODE],

[l m TUNING] and [I/1] simultaneously.

5. After blink STANDBY, RESET is displayed, disconnect

the AC plug.

COMMON TEST MODEProcedure:


2. Press three buttons of [PLAY MODE/TUNING MODE],

[TUNING + M L], and [DISPLAY] simultaneously.

3. It enters the common test mode and displays COMMON.

4. Each time the [VOLUME] dial is turned, VOL MIN, VOL

16, and VOL MAX are displayed.5. To release from this mode, press three buttons of [PLAY

MODE/TUNING MODE], [TUNING + M L], and [DIS-

PLAY] simultaneously.


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HCD-EC68P/EC78P

19

[CD SERVO TEST MODE]This mode can check the servo system operations of the optical

pick-up system (= optical unit + CD board).

Note1: Do not enter the [CD SERVO TEST MODE] while any other test

mode is in progress.

Note2: Do not enter any other test mode while the [CD SERVO TEST

MODE] is in progress.

How to Enter the CD Servo Test Mode

Procedure:



3. Press three buttons of [CD N], [l m TUNING] and[DISPLAY] simultaneously.

4. It enters the CD servo test mode and displays BDT S CU.

How to Exit from the CD Servo Test Mode

Procedure:

1. Press three buttons of [CD N], [l m TUNING] and[DISPLAY] simultaneously.

2. It releases from the CD Servo Test Mode and returns to theordinary CD function.

Key Operation:

[ +], [ ]:

Use these keys to move between the five modes

contained in the CD Servo Test Mode, that are the

S-Curve Mode, the RAM Read Mode, the RAM

Write Mode, the Command Out Mode and the Error

Rate Mode as described below. Also, use these keys

to move between the menus within the respective

five modes. When [ +] is pressed, the screen ad-

vances to the next menu or to the next mode. When

[ ] is pressed, the screen returns back to the

previous menu or to the previous mode. Use thesekeys also to increase or decrease the numeric value

when changing the numeric value. Pressing [ +]

increases the value and pressing [ ] decreases

the value.

[DSGX] , [EQ]:

Use these keys to move between the different layers

of the hierarchy of the CD Servo Test Mode shown

below. Press [DSGX] to move down to the lower

layer, and press [EQ] to move up to the higher lay-

er.

[TUNING + M L], [l m TUNING]:

Use these keys to move the cursor to the right digit

or to the left digit in the six-digit number, when

changing the numeric value.

Press [TUNING + M L] to move the cursor

to the right, and press [l m TUNING] to

return the cursor to the left.

[FUNCTION]:

Use this key to execute Command Out in the Com-

mand Out Mode.

CD Servo Test Mode Tree:

S Curve Mode LD ON

(BDT S CU) (LD ON)

RAM Read Mode Disc Type value indication

(BDTRAM R) (DISCTYPE) (AL: 0000, RW: 0001)

Gain Index value indication

(GAININDX) (0001)

RFO GAIN value indication

(RFO_GAIN) (0009)

FEO GAIN value indication

(FEO_GAIN) (0005)

SBAD GAIN value indication

(SBAD_GAI) (0007)

TEO GAIN value indication

(TEO_GAIN) (000A)

Disc Size value indication

(DISCSIZE) (0000: Non disc, 0001: 8cm,

0002: 12cm)

Op ABRAKE Error value indication

(OPABRKER) (0000)

SBBT Data value indication

(SBBT DAT) (006C)

FEOOCD value indication

(FEOOCD) (0440)

RAM Write Mode SPG Mask value edit

(BDTRAM W) (00 SPG) (Non mask:00, Mask:01) Fix RF Gain value edit

(00 FIX) (Non Fix:00, AL Fix:01, RW Fix:02)

TMAX ON value edit

(00 TMA)

Driver Mute OFF value edit

(00 D_M) (Normal:00, Forced OFF:01)

Command Out Mode COMOUT6X value edit command out

(BDT COMO) (COMOUT6X) (000000) (OK)

READ2X value edit command out

(READ2X) (60) (50)

REG READ value edit command out

(REG_READ) (00) (0000)

FEBC? command out

(FEBC?) (00)

FGADD? command out

(FGADD?) (10)

TEBC? command out

(TEBC?) (00) TGADD? command out

(TGADD?) (00)

RFGC? command out

(RFGC?) (00)

FEOF? command out

(FEOF?) (FFC0)

TEOF? command out

(TEOF?) (FFC0)

TEIOCD1? command out

(TEIOCD1?) (FE80)


(TEIOCD2?) (FF40)


(TEIOCD3?) (FFC0)

TEOOCD? command out

(TEOOCD?) (FD00)

FEOOCD? command out

(FEOOCD?) (F780)

MONITOR value edit command out

(MONITOR) (570A00) (OK)

Error Rate Mode Error rate indication

(BDT ERR) (00000000)

Higher layer Lower layer of menu hierarchy


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HCD-EC68P/EC78P

20

CD SERVICE MODEThis mode can move the SLED of the optical pick-up, and also can

turn the optical pick-up laser power on and off.

Procedure:


2. Press three buttons of [CDN], [TUNING + M L], andDISPLAY simultaneously.


4. It enters the CD service mode and displays SERVICE.

5. To exit from this mode, press three buttons of [CDN], [TUN-ING + M L] and DISPLAY simultaneously.

Key Operation:

[TUNING + M L], [l m TUNING]:

Use these keys to move the SLED. When [TUN-

ING + M L] is pressed in this mode, the SLED

moves to outer circumference and the message

SLED OUT is displayed.

When [l m TUNING] is pressed in this

mode, the SLED moves to inner circumference and

the message SLED IN is displayed.

[DISPLAY]:

Use this key to turn the optical pick-up laser power

on and off. When the laser power is turned on, the

message LD ON is displayed. When the laser

power is turned off, the message LD OFF is dis-

played.

CD ERROR CODEThe past errors of the CD mechanism (CDM) are displayed as the

CDM Errors, and those of the optical pick-up system (= optical

unit + CD board) are displayed as the BD Errors as shown below.

Procedure:

1. Press the [I/1] button to turn the power on.2. Press the [FUNCTION] button to select CD function.

3. Press three buttons of [TUNING + M L], [x] and [DIS-

PLAY] simultaneously.

4. Then, the CDM error code is displayed as M0xxxxxx (x

means hexadecimal number) on the liquid crystal display as

shown below.

5. Every pressing of the [TUNING + M L] button in this

mode increments the number after M starting from M0 up

to M9, and then returns to M0. Every pressing of the [l

m TUNING] button in this mode decrements the number

after M. The smaller the error code number is, the newer the

error content is.

6. When the [PLAY MODE/TUNING MODE] button is pressed

then, the BD error code is displayed as D0xxxxxx (x meanshexadecimal number) on the liquid crystal display as shown

below. In the same way as the CDM error code, use of the

[TUNING + M L] and the [l m TUNING] but-

tons in this mode enables tracing of the error history.

7. To release from this mode, press the [I/1] button to turn the

power off.

Contents of CDM Er rors

Error display example

M0 FF1142

1234

1 It indicates the error history number 0 to 9: The error code number 0 indicates the newest error.

2 It indicates whether the CDM error occurs in the normal opera-tions or during the initialization operation.

FF : The error has occurred in the normal opera-

tions.

Other than FF : The error has occurred during the initialization

operation.

3 It indicates the processing during which the trouble has oc-curred.

01: The disc EJECT processing is in progress.

02: The disc INSERTION-WAITING processing is in prog-

ress.

03: Processing of the disc INSERTION-REQUEST for the up-

per CD tray is in progress.

04: Processing of the disc EJECTION-REQUEST for the up-

per CD tray is in progress.

05: The disc pulling-in operation is in progress.

06: The disc chucking processing is in progress.

07: The disc re-chucking processing is in progress.

08: The disc chucking-release completion operation is in prog-

ress.

4 It indicates the operation during which the trouble has oc-curred.

00 : Waiting for the operation.

10 to 13 : The disc EJECT operation is in progress.

20 : The disc pulling-in operation is in progress.30 : The disc chucking-release operation is in progress.

40 to 43 : The disc EJECT operation due to error is in prog-

ress.

Contents of BD Errors

Error display example

D0 020901

1234

1 It indicates the error history number 0 to 9: The error code number 0 indicates the newest error.

2 It indicates the error content

01: The focus servo cannot lock-in.02: GFS is no good (NG).

03: The startup time exceeds the specified period of time (time

over)

04: The focus servo is unlocked continuously.

05: Q code cannot be obtained within the specified period of

time.

06: The tracking servo cannot lock-in.

07: Blank disc


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HCD-EC68P/EC78P

21

3 It indicates the on-going processing of optical pick-up system(= optical unit + BD board) when the trouble has occurred.

01: The CD SHIP mode processing is in progress.

02: The POWER OFF processing is in progress.

03: The INITIALIZE processing is in progress.

04: The optical pick-up system (= optical unit + BD board) is

in the stop state.

05: The STOP operation is in progress.

06: The startup processing is in progress.

07: The TOC read-in processing is in progress.

08: The SEARCH operation is in progress.

09: The PLAY operation is in progress.

0A: The PAUSE operation is in progress.

0B: The PLAY MANUAL SEARCH operation is in prog-

ress.

0C: The PAUSE MANUAL SEARCH operation is in prog-

ress.

4 It indicates the operation that is being processed when the trou-ble has occurred.

It indicates the step number of each processing specified by3.Because the numbers of steps are different in each processing,

this number is different in each processing.

CD FACTORY MODE

Note1:Do not enter the [CD FACTORY MODE] while any other test-

mode is in progress.

Note2: Do not enter any other test mode while the [CD FACTORY

MODE] is in progress.

Procedure:


2. Press the [FUNCTION] button to select CD function

3. Press three buttons of [CD N], [FUNCTION], and [DIS-PLAY] simultaneously.

4. It enters the CD factory mode and displays the following mes-

sage.

X1ON

S character mode setting

Tracking servo setting

RF gain setting

Key Operation:

[DISPLAY]:

The display changes in the following order when-

ever the button is pressed.

(Initial display)

fcsAG ** (**: Focus AGC value)

trkAG ** (**: Track AGC value)

RF-AG ** (**: RF AGC value)

[DSGX]:

RF gain setting changes whenever the button is

pressed.

: No gain fixation.

AL: Fix to the gain for AL disc.

RW: Fix to the gain for RW disc.

[EQ]:

Tracking servo setting changes whenever the but-

ton is pressed.

ON: Tracking servo ON.

OFF: Tracking servo OFF.

[FUNCTION]:

S character mode setting changes whenever the but-

ton is pressed.

: S character mode OFF.

S: S character mode ON.

5. To release from this mode, press the [I/1] button to turn the

power off.


22/66

HCD-EC68P/EC78P

22

SECTION 5

ELECTRICAL ADJUSTMENTS

CD SECTION

Note:

1. CD Block is basically constructed to operate without adjustment.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10 Mimpedance.

4. Clean the object lens by an applicator with neutral detergent when the

signal level is low than specified value with the following checks.5. Check the focus bias check when optical pick-up block is replaced.

FOCUS BIAS CHECK

+

CD board

oscilloscope(DC range)

TP121 (RFI)TP124 (VC)

Procedure :

1. Connect the oscilloscope to TP121 (RFI) and TP124 (VC) on

the CD board.2. Press the [?/1] button to turn the power ON, and press the [Z]

button to open the CD disc tray.

3. Set disc (YEDS-18) on the trey and press the [CDN] buttonto playback.

4. Confirm that oscilloscope waveform is as shown in the figure

below. (eye pattern)

A good eye pattern means that the diamond shape () in the

center of the waveform can be clearly distinguished.

VOLT/DIV: 200 mVTIME/DIV: 500 ns

level:

1.2 0.3 Vp-p

Checking Location:

TP124(VC)

CD Board (Conductor Side)

TP121

(RFI)

IC101

[AM]

Setting:

FUNCTION: AM

AM RF signalgenerator

30% amplitudemodulation by400 Hz signal

Output level: 54 dBuV

60 cm

set

loop antenna A loop antenna B

+

level meter

32

JACK boardPHONES jack (J492)MAIN board

ANTENNACN801 pin

[FM]

Setting:

FUNCTION: FM

FM RF signalgenerator

75kHz frequencydeviation by 1K HzsignalOutput level: as low as possible (8dBuV)

+

level meter

set

32 0.01 F

JACK boardPHONES jack (J492)

MAIN boardANTENNACN801 pin


digital voltmeter

100 kMAIN board

IC801 pin (TUNER VT)

Repeat the procedures in each adjustment several times.

TUNER SECTION 0 dB = 1 V


23/66

HCD-EC68P/EC78P

23

AM FREQUENCY COVERAGE ADJUSTMENT

(Except EC78P: UK model)

Adjustment Part Frequency DisplayReading on Digital

Voltmeter

L801 530 kHz 1.5 0.1 V

Confirmation 1,710 kHz 8 0.5 V

AM FREQUENCY COVERAGE ADJUSTMENT

(EC78P: UK model)


Voltmeter

L801 531 kHz 1.5 0.1 V

Confirmation 1,602 kHz 7.2 0.5 V

AM TRACKING ADJUSTMENT

(Except EC78P: UK model)

Adjust for a maximum reading on level meter

L805 530 kHz

AM TRACKING ADJUSTMENT(EC78P: UK model)

Adjust for a maximum reading on level meter

L805 531 kHz

FM FREQUENCY COVERAGE ADJUSTMENT


Voltmeter

L803 87.5 kHz 1.75 0.1 V

Confirmation 108 kHz 6.2 0.5 V

FM TRACKING ADJUSTMENT

Adjust for a minimum reading on level meter

L804 98 MHz

Adjustment Location:MAIN board (See page 24)

FM DETECTOR ADJUSTMENT

Setting:

FUNCTION: FM

FM RF signalgenerator

Carrier frequency: 98MHzModulation:deviation by FM 75 kHzOutput level: 60 dBuV

+

level meter

MAIN boardJW801 (TUNER-GND)

MAIN boardIC801 pin (TUNER OUT L-ch)

set



1. Turn the set to 98 MHz.

2. Adjust L802 so that modulation distortion may become the

best in the vicinity of the maximum value where the tuner out

level becomes 15dBuV or more.

FM AUTO STOP CHECK

generator

SET

+

75

Procedure :

1. Turn the power on.

2. Input the following signal from Signal Generator to FM an-

tenna input directly.

Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz

Deviation : 75 kHz

Modulation : 1 kHz

ANT input : 35 dBu (EMF)

Note: Please use 75 ohm coaxial cable to connect SG and the set. You

cannot use video cable for checking.

Please use SG whose output impedance is 75 ohm.

3. Set to FM tuner function and scan the input FM signal with

automatic scanning.

4. Confirm that input Frequency of A, B and C detected and auto-

matic scanning stops.

The stop of automatic scanning means The station signal is re-

ceived in good condition.


24/66


25/66


26/66


27/66


28/66

HCD-EC68P/EC78P

HCD-EC68P/EC78P

2828

R150

R149R148

C148

C301

C303

C302

C104

R147

R146 R145

C150

C

C105

C147

C146

C145

C118

C117

C144

C101

C125

C143

C120

R144

C142

C141

C140

C

100

C107

C124

C127

C126

CN301

R101

C119

C102

R

C103

C113

R10

R402

C138

C137

R135

R134

R136

R130

R128

R129

R143

R139

C136

R120

R114

C153

C112

R125

R126

C149

C139

R127R118

R140

R151

C122

C123

R155

C128

C106

C201

R304R

302

C309

C205

C207

C307

R303

C133

R111

R112

C115

R211

Q301

R301C

204

C202

C206

C306

R212

C401

C130

X102

C405

IC201

IC101

R201

R142

CD BOARD (COMPONENT SIDE)

CD BOARD (CONDUCTOR SIDE)

3

1

4

5

TP124

(VC)

TP121(RFI)

125

5175

76

100

161

1-872-135-

11

(11)

OPTICAL PICK-UP BLOCK

(KSM-213DCP)

A

B

C

D

E

F

1 2 3 4 5 6 7

E

M401

(SPINDLE)M

6-3. PRINTED WIRING BOARD - CD Boar d - See page 27 for Circuit Boards Location. : Uses unleaded solder.


29/66

HCD-EC68P/EC78P

2929

R108R154

R153

C201

R304

R110

R303

R219

R218

R112

Q301

R301

C202

R157

TP121(RFI)

TP124(VC)

R156

CN301

R101

C401R415

R102

R128

R129

R143

R142 R139

R114R140

R151

R150

IC101

R105

R106

R125

R126

R127

X102

C301

C307

C309

C100

C138

C153

C204

C130

C128

C113

C127

C126

C103

C102

C120

C118

C117

C101

C124

C125

R145

R146

R147

R148

R149

C149

C105

C143

C146

C145C148

C104

C405 C404

C403

C205C116

C133

C110

R113

R111

C115R155

C109

C132

R104

C123

C122

C139

C150

R136 R135

R134 C112 C108

R120

R118

C136C107

R130

R144

C144

C147

C140

C137

C141

C142

C106

R302

C306

C303C302

R405

R402

R408

R414

C207

IC401

01M

1M

10010V

2.2

10k

2.2

100k

100k

100

2SA2119K

100k

100

10V

100

100

16P

220

22010V

47k

10k

470k1k

47k

22k 47k

10k0

0

0

TK631

0.1

1

0.001

0.1

4

70p

0.1

0.1

0.1

0.0022

0.1

0.1

0.1

0.01

0.01

0.022

C119

0.022

0.1

0.0047

0.0047

0

0

0

0

0

22p

0.1

0.01

470p

0.01

47p

0.1

0.1 0.1

0.1

0.1

0.1

0.1

0.1

10k

100

22

6.3V

47

0.1

0.1

0

470p

470p

0.01

0.001

22k 470k

1M 0.1 0.1

47p0.1

4.7k

22k

0.1

0.1

0.01

0.01

0.0022

0.1

10010V

0

10010V

1010

10k

2.2k

2.2k

4.7k

1

BA5826SFP-E2

SP-

SP+

SL+

SL-

1M 1k

0

0

0

16.9344MHz

TC94A70FG-006

5p5

p

0

100k

IC101

CD-MP3PROCESSOR

IC401

FOCUS/TRACKINGCOILDRIVE,

SLED/SPINDLEMOTORDRIVE

IC

+1.5VR

SP-

SP+

SL+

SL-

M401(SPINDLE)

M402(SLED)

AUTOMATICPOWER

CONTROL

(BX5BT/CBX1)

IC B/D

2

1

IC B/D

OPTICALPICK-UPBLOCK

(KSM-213DCP)

M

M

6-4. SCHEMATIC DIAGRAM - CD Boar d - See page 39 for waveforms. See page 42 for IC Block Diagr ams. See page 43 for IC Pin Function Descr iptio n.


30/66


31/66


32/66


33/66

HCD-EC68P/EC78P

3333

IC B/D

(2/3)BOARD

2MAIN

3BOARD

(1/3)

MAIN

18

5.1 1

3.2

5.1

5

0

0

3.2

8.6

4.3

4.3

4.3

4.3

4.3

4.3

100uHL701

16V470C761

25V100C760

4.7

k

R761

33k

R762

1kR763

50V1

C771 50V1

C772

50V1

C773

50V1

C774

0.01C791

10V47

C775

25V

22

C776

4.7

k

R779

4.7kR780

TP706

TP712

TP713

TP714

TP715

1C786

1C787

33k

R781

56k

R782

1

2

3

4

5

6

7

8

9

10

11

11PCN609

PGND

VBUS(5V)

VBUS(5V)

DMP-RXD

DMP-TXD

DMP-DET

DGND

L+

L-

R+

R-

8 7 6 5

4321

NJM4558V-TE2IC770

V-

V+

100kR783

100kR784

100kR785

100kR786

22kR771

22kR772

22kR773

22kR77422kR776

22kR775

22k

R777

22kR778

ISA1235AC1TP-1EFQ761

1

0V

100

C762

DTC114EKAQ762

R767

2W0.47

47R769

47R759

RK36LF-A4

D701

10kR768

1 2 3 4 5IC BD9701CP-V5

IC701

VCC

OUT

GND

INV

STBY

R770

0

JW788

4

5

7

6

DMP-DET/USB-RST

DMP-TXD

DMP-RXD

DMP-L

5V-ON/TP-REC-MUTE

DMP-R

DMP-5V-DET

-+

+-

LINE AMP

IC770

IC701+5V REGULATOR

VOLTAGE DETECTQ761, 762

MAIN BOARD (3/3)

7

D

B

6 9 531

C

E

84

A

2

PGND

VBUS(5V)

VBUS(5V)

DMP-RXD

DMP-TXD

DMP-DET

DGND

L+

L-

R+

R-

6-8. SCHEMATIC DIAGRAM - MAIN Secti on (3/3) -

(Page 31)

See page 42 for IC Block Diagrams.

(Page 32)


34/66

HCD-EC68P/EC78P

HCD-EC68P/EC78P

3434

B E

B E

Q151

Q152

R151

R152

R153

R154

R155

R156

R159

R160

R161

R162

R163R164

R171

R172

R173

R175

R176

R177

R178

R181

R182

R183R184

R185 R186

C153 C154

C155 C156

R195

C159

R196

C160

C161

C162

C166C173

C174

C175C176

C178

D151

D1

JR151

1 15

1

6

4

2CN151

R179R180

C151

C152

C157

C158C169

C170

JW151

JW152

JW153

JW154

JW155

JW156

JW157

IC151 IC152(EC78P: US, CND)(EC78P: UK)

EMAIN

BOARD

CN632

1-875-496-

14

(14

HI AMP BOARD

A

B

1 2 3

(1/3)

MAIN

E

CN632

BOARD

00200

35

.20000

36

.7

-36

.8

-35

.2

0 0

0

00

0

C1664700p

50V

C1511

R175

220

R177

220

R178

220

R176

220

2W

R1790.22

2W

R1800.22

R1852.2k

R1862.2k

2SA2026Q151

2SA2026Q152

MC2838-T112-1D151

1 98765432 151413121110

STK433-

(EC78P:U

IC151

-PRE

-VCC

+VCC

LO+

LO-

RO+

RO-

+PRESUB

GND

LI+

LI-

ST-B

Y

RI-

RI+

C156 100p

C155100p

C159

3p

C160

3p

C170

C169

1006

.3V

1006

.3V

R164

47k

R163

47k R155

47k

R151

R151. 152220 (EC78P: US, CND)1.8k (EC78P: UK)

C153470p

R159

1k

R160

1k

C1610.01

0.1C174

0.1C173

R172100

R1811.2k

R182 1.2k

R18322k

R18422k

TP151

TP152

TP153

TP154

TP155

R162

470R161

470

MA2J1110GLS0D152

1

2

3

4

5

6

6PCN151

PA-GND

OUT-R

+VH

NC

-VH

OUT-L

50V

C158

150V

C157

1

0R171 470R196

470R195

C1750.1

C1760.1

R15322k

OVER LOAD DETECTQ151,152

HI AMP BOARDIC15POWER A

7

D

B

6 531

C

4

A

2

(EC78P:UK)

6-9. PRINTED WIRING BOARD - HI AMP Boar d (EC78P) -

(Page 30)

See page 27 for Circuit Boards Locat

6-10. SCHEMATIC DIA GRAM - HI AMP Board (EC78P) -

(Page 31)


35/66

HCD-EC68P/EC78P

3535

BE

BEQ101

Q102

R101

R102

R103

R104

R105

R106R107

R108

R109 R110

R111 R112

R113

R114

R122

R123

R125

R126

R127

R128

R131

R132

R133R134

R135R136

C103

C104

C105R142 C106

R145

C109

R146

C110

C116

C123

C124

C125 C126

C128

D101

D103

JR132

1 15

45

1

2

1

5

CN102

CN104

R129 R130

C101 C102

C107 C108

C119

C120

JW131JW132 JW133

JW134

JW135JW136

JW137

LOW AMP BOARD

IC101 IC102(EC68P/EC78P: UK) (EC78P: US,CND)

G

HMAIN

BOARD

CN603

MAIN

BOARD

CN633

1-875-495-

14

(14)

A

B

1 2 3 4

G

CN633

BOARD(1/3)

MAIN

0

-36

.8 0 0

-35

.2 00 0

36

.7 0 0

35

.2 2

0

0

0

0

00

C1164700p

50V1

C101

50V1

C102

220

R125

220

R127

220

R128

220

R126

2W0.22R129

2W0.22R130

2.2kR135

2.2kR136

2SA2026Q101

2SA2026Q102

MC2838-T112-1D101

C106 100p

C105100p

3p

C109

3p

C110

C120

C119

1kR123

47k

R114

47k

R11

3

47kR107

47kR108

25V

47C

108

25V

47C

107

R103

R104

R105

R106

470pC103

470pC104

0.1C128

1k

R109

1k

R110

0.1C124

0.1C123

0R101

0R102

22kR133

22kR134

1.2kR132

1.2kR131

R122100

1

2

3

4

5

5PCN104

PA-GND

OUT-R

+VH

-VH

OUT-L

TP101

TP102

TP103

TP104

TP105

TP107

TP108

TP109

TP110

TP111

470R112470R

111

1

2

3

4

5

5PCN102

PRO

AMP-

IN-L

A-GN

IN-R

MA2J1110GLS0D103

0R142

1 98765432 151413121110STK433-070 (EC78P: UK)

IC101STK433-060 (EC68P)

IC102STK433-090-E(EC78P: US, CND)

(EC78P: US, CND)(EC68P/EC78P: UK)

470R145

470R146

C1260.1

C1250.1

LOW AMP BOARDIC101

POWER AMP

IC102POWER AMP

-PRE

-VCC

+VCC

LO+

LO-

RO+

RO-

+PRESUB

GND

LI-

LI+

ST-B

Y

RI-

RI+

Q101,102OVER LOAD DETECT

100 63V

100 50VC119, 120

(EC68P)

(EC78P)

R103, 104220 (EC78P: US, CND)1.8k (EC78P: UK)3.3k (EC68P)

R105, 1064.7k (EC68P)22k (EC78P)

B

A

D

C

76 531 842

(Page 31)

6-11. PRINTED WIRING B OARD - LOW AMP Boar d - : Uses unleaded solder. See page 27 for Circuit Bo ards Location.

6-12. SCHEMATIC DIAGRAM - LOW AMP Boar d -

(Page 30)

(Page 30)


36/66

HCD-EC68P/EC78P

HCD-EC68P/EC78P

3636

1

100

30 31

81

80

50

51

B E

B EB E

B E B E

B E

BEBE E

BE

R400R401

R405

R406

R412R413

R448

R414

R415

R416

R419

R420

R422

R426 R428

R446

R447

Q301

Q303

Q304Q305Q306

Q313

Q314 Q

Q317Q318

FB301R301

R309

R31

R31

R318

R319

R320

R321

R322

R323

R324

R325

R326

R327

R328

R329

R330

R331

R332

R333R334

R335

R336

R337

C301

C304

C351

R3

R347

C310

C311

C312

R350

C314

R351

C315

R352

C316

R353

C317

C319

R358

R359

C320C321

C348C347

R360

R361

R362

R363

R364

C328

R365

R366

R367

R368

R369

C330

C332

R370

R371

R372

R373

R374

C338

R375

R376

R445

R441R443

D306

R442

R377

R378

R444

R379

C340C341

C342

C344C345

C353

CN311

C346

R383

R384

R386

R387

R389

C354

R390

C355R391

C356

R392

R396

D301

D302

D303

D304

D307

JR301

JR302

JR303

JR304

JR305

JR307

R429

JR308

JR309

JR310

JR311

JR313JR315

SCR1B E

37

1

212

13

2 4

1 5

19

12

JW370

JW372

JW373

JW374

JW375

JW376

JW377

JW378

JW379

JW380

JW381

JW382

JW383JW385

JW386

JW387

JW388

JW392JW393

JW394

JW395

JW396

JW398

JW397

JW399

JW400

JW401

JW402

JW403

JW404

JW405

JW406

Q302

LED301

SWSW304

SW305

TUNING +

W301

3 1

SW312

SW313

SW314

SW315

SW319

CN302 CN303

C302

C303C305

C306

C309

C357

C352

X301

X302

S301

C343

JW303

JW304

J

JW306

JW307

JW

JW310JW311

JW313

JW314

JW315

JW31

JW317

JW318

JW320

JW324

JW325

JW326

JW328

JW329

JW330

JW331

JW332

JW333

JW335

JW336

JW337

JW338

JW339

JW340

JW342

JW343

JW344

JW347

JW348

JW350

JW351

JW352

JW353

JW354

JW35

JW356

JW357

JW358

JW360

JW361

JW362

JW364

JW365

JW366

JW368

PANEL BOARD

IC301

IC303

+

FUNCTION

VOLUME

ROTARY

ENCODER

DISPLAY

(EC68P/EC78P:US,CND)

(EC78P:UK)


LCD301

LIQDID CRYSTAL DISPLAY

(EC78P)

(EC68P:AUS/EC78P:UK)

STANDBY

A KEY CD

BOARD

Q

MOTOR

BOARDCN001

CD MECHANISM

DECK

A

B

C

D

E

F

G

1 2 3 4

(CHASSIS)


(Page 39)(Page 38)

Ref. No. Locatio n

Semiconductor

Location

D301 D-4

D302 D-2

D303 D-3

D304 C-4

D305 E-5

D306 E-2

D307 E-3

IC301 B-3

IC302 A-5

IC303 E-2

LED301 A-1

Q301 B-1

Q302 D-4

Q303 D-4

Q304 D-3

Q305 D-2

Q306 D-2

Q307 E-5

Q308 E-5

Q309 E-5

Q310 E-5

Q311 F-5

Q312 F-5

Q313 F-4

Q314 F-4

Q315 F-5

Q316 F-4

Q317 F-4

Q318 F-4

6-13. PRINTED WIRING BOARD - PANEL Board - See page 27 for Circuit Boards Loca


37/66


38/66

HCD-EC68P/EC78P

HCD-EC68P/EC78P

3838

(1/3)BOARD

CMAIN

CN605

17.1 8.9

R42.2

R4082.7k

R4093.9k

R4106.8k

R41115k

KEY CD BOARD

DISC 1

SW306SW307

DISC 2

SW308

DISC 3

CDDMPORT

SW309SW310

DISC SKIP/EX-CHANGE

C4910.1

C4951000p

C4961000p

TP491

TP492

TP493

TP494

TP495

TP496

TP497

TP498

R49122k

R49222k

JACK BOARD

1

A-GND

AUDIO-L

HP-GND

AUDIO-R

HP-R

HP-L

SP-RELAY

AMP-ON

9 GND

0.1C698

I OG

TA7809SIC601

1 3

2

REG BOARD

+9V REGULATOR

IC601

TP409

TP4101

2

3

3PW401

KEY

GND

KEY

KEY POWER BOARD

STANDBY

SW301

/

B

31

C

D

E

F

G

A

2

3

2

1

3PW610

OUT

GND

IN

(EC68P/EC78P: US, CND

(EC78P: UK)

(Page 31)

6-16. SCHEMATIC DIAGRAM - KEY Secti on -6-15. PRINTED WIRING BOARDS - KEY Section -

: Uses unleaded solder. See page 27 for Circuit Boards Location.

R407

R411

R409

R410

R408

KEY CD BOARD

R491

R492

1 9

C491

C495

C496

JACK BOARD

C698

13 2

SW301,SW306- 310

1 2

SW310

SW307

SW307

SW309

(EC78P:UK)


(EC68P/EC78P:US,CND) (EC68P/EC78P:US,CND)

SW308

SW309

SW306

SW306

1

3

SW301

W401

KEY POWER BOARD

JW491

1 3

JW614

W610

REG BOARD

IC601

A PANEL

BOARDCN303

1-875-492-

14

(14)

14

(14)

14

(14)

14

(14)

DISC 1

DISC SKIP/EX-CHANGE

DISC 2

DMPORT CDDISC 3

D MAINBOARD

BPANELBOARDCN306

C MAINBOARDCN605

1-875-489-

1-875-493-

1-875-491-

STANDBY

J492

J491

PHONES

AUDIOIN

B

A

C

D

E

1 2 3 4 5

(NC)

(Page 36)

(Page 36)

(Page 30)

(Page 30)


39/66

HCD-EC68P/EC78P

3939

M001

CN001

S001

5P

OPEN SW

CLOSE SW

OPEN

CLOSE

(LOADING)DGND

CLOSE

OPEN

CD TRAY

OPEN/CLOSE

DETECTPANELBOARDCN311

Q

CN001 S001

A

B

1 2 3 4 5 6 7

1-866-548-

21

(21)

MOTOR BOARD

QPANELBOARD

CN311

DISC TRAYOPEN/CLOSE

DETECT

OPENCLOSEM

M001

(LOADING)

(Page 37)

6-17. PRINTED WIRING BOARD - MOTOR Boar d (EC68P/EC78P: US, Canadian models ) -

6-18. SCHEMATIC DIAGRAM - MOTOR Boar d (EC68P/EC78P: US, Canadi an models) -

: Uses unleaded solder. See page 27 for Circuit Boards Location. Waveforms

CD Board

IC101(XO)(CD play mode)

1 V/DIV, 20 ns/DIV

59.1 ns

3.3 Vp-p

IC101(RFi)(CD play mode)

200 mV/DIV, 500 ns/DIV

0.5 to 1.3 Vp-p

IC801

500 mV

13

MAIN Board

(Page 36)


40/66

HCD-EC68P/EC78P

HCD-EC68P/EC78P

4040

C051

1

3

CN053

RY001

RY001

RY002

RY002

JW0

Documents

HCD-EC68P_78P Manual de Servicio