hcd-ec68p_78p manual de servicio
TRANSCRIPT
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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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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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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
6-7. Schematic Diagram - MAIN Section (2/3) - ................... 32
6-8. Schematic Diagram - MAIN Section (3/3) - ................... 33
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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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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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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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.
Press FUNCTION +/(or FUNCTIONon the unit) repeatedly.
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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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-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.
Press FUNCTION +/(or FUNCTIONon the unit) repeatedly.
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.
Press FUNCTION +/(or FUNCTIONon the unit) repeatedly.
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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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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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)
(EC68P/EC78P: US, Canadian)
3-10. 1 CD MECHANISM BLOCK
(EC68P/EC78P: US, Canadian)
(Page 15)
3-11. BASE UNIT
(EC68P/EC78P: US, Canadian)
(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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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
two screws (BVTP3 10)
two screws (BVTP3 10)
screw (KTP3 10)
screw (KTP3 10)
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two screws (BVTP3 10) (EC78P)
two screws (BVTP3 10)
connector (CN601)
connector (CN633)
flexible flat cable (5 core) (CN603)
flexible flat cable (5 core) (CN602) (EC78P)
connector (CN151) (EC78P)MAIN board
two screws (BVTP3 6)
screw (BVTP3 10)
flexible flat cable (31 core) (CN803)
flexible flat cable (9 core) (CN605)
flexible flat cable (11 core) (CN609)
connector (CN604)
flexible flat cable (21 core) (CN608)
3-4. MAIN BOARD
two screws (BVTP3 10)
flexible flat cable(9 core) (CN605)
flexible flat cable(11 core) (CN609)
Turn a gear by a drivertill a lever falls down
to the position of the figure.
pull the tray by hand.
lever
gear
flexible flat cable (31 core) (CN803)
flexible flat cable (13 core) (CN302)
door (CD)
front panel block
3-5. FRONT PANEL BLOCK (EC78P: UK)
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3-6. FRONT PANEL BLOCK (EC68P/EC78P: US, Canadian)
two screws (BVTP3 10)
flexible flat cable(9 core) (CN605)
flexible flat cable(5 core) (CN001)
flexible flat cable(11 core) (CN609)
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)
two screws (BVTP3 10)
screw (BVTP3 10)
connector (power cord) (CN053)
connector (CN601)
back panel block
Cut the clamp.
two screws (BVTP3 10)
two screws (BVTP3 10) (EC78)
Note:Please do not forget fixation by clamping
when you install the power cord.
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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)
3 CD mechanism block
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3-10. 1 CD MECHANISM BLOCK (EC68P/EC78P: US, Canadian)
3-11. BASE UNIT (EC68P/EC78P: US, Canadian)
three screws (BVTP3 10)
flexible flat cable(21 core) (CN201)
flexible flat cable (5 core) (CN001)
1 CD mechanism block
two screws (BVTP4 12)
PT block
two screws (BVTP4 12)
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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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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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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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:
1. Press the [I/1] button to turn the power on.
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:
1. Press the [I/1] button to turn the power on.
2. Press the [FUNCTION] button to select CD function.
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:
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 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:
1. Press the [I/1] button to turn the power on.
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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[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:
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 [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? command out
(TEIOCD2?) (FF40)
TEIOCD3? command out
(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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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:
1. Press the [I/1] button to turn the power on.
2. Press three buttons of [CDN], [TUNING + M L], andDISPLAY simultaneously.
3. Press the [FUNCTION] button to select CD function.
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:
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 [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.
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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
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
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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)
Adjustment Part Frequency DisplayReading on Digital
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
Adjustment Part Frequency DisplayReading on Digital
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
MAIN boardANTENNACN801 pin
MAIN boardANTENNACN801 pin
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.
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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.
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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.
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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)
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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)
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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)
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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)
(EC68P/EC78P:US,CND)
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)
(EC68P/EC78P:US,CND)
(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
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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) (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)
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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)
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HCD-EC68P/EC78P
HCD-EC68P/EC78P
4040
C051
1
3
CN053
RY001
RY001
RY002
RY002
JW0