Sony HCD-EC68/78P Schematic

HCD-EC68P/EC78P

SERVICE MANUAL

Ver. 1.1 2009.01

• HCD-EC68P is the amplifi er, CD player and
tuner section in MHC-EC68Pi.

• HCD-EC78P is the amplifi er, CD player and
tuner section in MHC-EC78Pi.

Model Name Using Similar Mechanism

Mechanism Type
Base Unit Name

Optical Pick-up Block Name

Photo : HCD-EC78P

US Model

HCD-EC68P/EC78P

Canadian Model

UK Model

HCD-EC78P

Australian Model

HCD-EC68P

CDM77B-K6BD90-WOD NEW
CDM88A-K6BD90-WOD HCD-EC68
Except EC78P (UK) CDM77B-K6BD90-WOD
EC78P (UK) CDM88A-K6BD90-WOD

BU-K6BD90-WOD
KSM-213DCP

Main unit

AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTALHARMONIC DISTORTION:
(HCD-EC78P e United States model only)
Low channel
With 8 ohm loads, both channels driven, from 120 – 10,000 Hz;
60 watts per channel minimum RMS power, with no more than

0.7% total harmonic distortion from 250 milliwatts to rated output.
High chann el
With 8 ohm loads, both channels driven, from 2,000 – 13,000 Hz;
60 watts per channel minimum RMS power, with no more than

0.7% total harmonic distortion from 250 milliwatts to rated output.

AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTALHARMONIC DISTORTION:
(HCD-EC68P e United States model only)
With 6 ohm loads, both channels driven, from 120 – 10,000 Hz;
40 watts per channel minimum RMS power, with no more than

0.7% total harmonic distortion from 250 milliwatts to rated output.

section

HCD-EC78P: US and Canadian models

RMS output power (reference):

Low channel
95 W + 95 W (per channel at 8 Ω, 1 kHz, 10% THD)
High chann el
95 W + 95 W (per channel at 8 Ω, 8 kHz, 10% THD)

HCD-EC78P: UK model

Power output (rated):

Low channel
50 W + 50 W (at 8 Ω, 1 kHz, 1% THD)
High chann el
50 W + 50 W (at 8 Ω, 8 kHz, 1% THD)

RMS output power (reference):

Low channel
70 W + 70 W (per channel at 8 Ω, 1 kHz, 10% THD)
High chann el
70 W + 70 W (per channel at 8 Ω, 8 kHz, 10% THD)

HCD-EC68P

RMS output power (reference):

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

SPECIFICATIONS

Inputs

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

Outputs

PHONES (stereo mini jack):
Accepts headphones with an impedance of 8 Ω or more
SPEAKER: impedance
HCD-EC78P: 8 Ω
HCD-EC68P: 6 Ω

CD player section

System: Compact disc and digital audio system

Laser: Semiconductor laser (λ=770 – 810 nm)
Emission duration: continuous
Frequency response: 20 Hz – 20 kHz
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 88 dB

Tuner section

FM stereo, FM/AM superheterodyne tuner
Antenna:

FM lead antenna
AM loop antenna

FM tuner section:

Tuning range
North American model: 87.5 – 108.0 MHz (100 kHz step)
UK and Aust ralia n mod els: 87.5 – 108.0 MHz (50 kHz step)
Intermediate frequency: 10.7 MHz

AM tuner section:

Tuning range
North American model:
530 – 1,710 kHz (with 10 kHz tuning interval)
531 – 1,710 kHz (with 9 kHz tuning interval)
Australian model:
531 – 1,710 kHz (with 9 kHz tuning interval)
530 – 1,710 kHz (with 10 kHz tuning interval)
Intermediate frequency: 450 kHz
UK model:
531 – 1,602 kHz (with 9 kHz tuning interval)
Intermediate frequency: 450 kHz

General

Power requirements:

North American model: AC 120 V, 60 Hz
Australian model: AC 230 – 240 V, 50/60 Hz
UK model: AC 230 V, 50/60 Hz

Power consumption:

HCD-EC78P

USA model: 210 W
Canadian model: 270 VA

UK model: 160 W

0.5 W (in Power Saving Mode)

HCD-EC68P

110 W

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

Approx. 200 × 306 × 415 mm

Mass (excl. speakers):

HCD-EC78P: US and Canadian models

Approx. 5.8 kg

HCD-EC78P: UK model

Approx. 6.1 kg

HCD-EC68P

Approx. 4.7 kg

COMPACT DISC RECEIVER

9-889-053-02

2009A05-1

2009.01

©

Sony Corporation

Audio&Video Business Group
Published by Sony Techno Create Corporation

HCD-EC68P/EC78P

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam­aged 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.

CAUTION

Use of controls or adjustments or performance of procedures other than
those specifi ed herein may result in hazardous radiation exposure.

This appliance is
classified as a CLASS 1
LASER product. This
marking is located on the
rear exterior.

SAFETY CHECK-OUT

After correcting the original service problem, perform the follow­ing 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 TEST

The 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 examples
of a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2 V AC range are suitable. (See
Fig. A)

To Exposed Metal
Parts on Set

SAFETY-RELATED COMPONET WARNING!

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

AC

1.5 kΩ0.15 μF

Earth Ground

voltmeter
(0.75 V)

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

ATTENTION AU COMPOSANT AYANT RAPPORT

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONC­TIONNEMENT. NE REMPLACER CES COM- POSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON­NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.

À LA SÉCURITÉ!

2

HCD-EC68P/EC78P

SECTION 1

SERVICING NOTES

TABLE OF CONTENTS

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

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

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 10

3-2. 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) ........................................................... 16

3-14. OP Base Assy (KSM-213D) ........................................... 17

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

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

6. DIAGRAMS

6-1. 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) - ....................... 39

6-19. Printed Wiring Board - PT Board - ................................. 40

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

7. EXPLODED VIEWS

7-1. 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

NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostat­ic 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 fl exible board is easily damaged and should be handled with
care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused
on the disc refl ective 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 SOLDER

Boards requiring use of unleaded solder are printed with the lead­free 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 MARK

Unleaded 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 fl ow)

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 LOCK

The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.

Releasing Procedure:

1. Press [I/

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

3. While pressing the [
seconds).

4. The message “UNLOCKED” is displayed and the disc tray is
unlocked.

Note: When “LOCKED” is displayed, the slot lock is not released by

] button to turn the power on.

1

] button, press the [Z] button for more 5

x

turning power on/off with the [I/1] button.

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

3

HCD-EC68P/EC78P

HOW TO OPEN THE TRAY WHEN POWER SWITCH TURN OFF

Pull the tray by the hand.



(EXCEPT EC78P: UK)

boss

Slide the boss by a driver.



HOW TO REMOVE THE KNOB (VOL)

knob (VOL)



(EC78P: UK)

gear

front panel block
(back view)

lever

Turn a gear by a driver



till a lever falls down
to the position of the figure.

hole

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



4

CAPACITOR DISCHARGE FOR ELECTRIC SHOCK PREVENTION

N

In checking the MAIN board, make a capacitor discharge
of C622 and C626 for electric shock prevention.

800 Ω/2W

HCD-EC68P/EC78P

MAIN board

800 Ω/2W

C626

C622

MAIN board

MODEL IDENTIFICATION
– Back Panel –

POWER
VOLTAGE
INDICATIO

Model Power Voltage Indication

EC68P: US/EC78P:
US and Canadian models

EC68P: Australian model
EC78P: UK model AC 230 V, 50/60 Hz

AC 120 V, 60 Hz

AC 230 - 240 V, 50/60 Hz

5

HCD-EC68P/EC78P

HCD-EC68P/EC78P: US and Canadian models:

Basic Operations
















remote,butthesameoperationscanalsobeperformed
usingthebuttonsonthe unithavingthesameor similar
names.

Before using the system

To use the remote

Slide and remove the battery compartment lid ,and
insert the two R6 (size AA) batteries (supplied),  side

Notes on using the remote

• Withnormal use, the batteries should last for about six months.

•

batteries.

• Ifyou do not use the remote for a long period of time, remove the
batteries to avoid damage frombattery le akage and corrosion.

• Batteries installed devicesshall not be exposed to excessive heat such

To set the clock

1 Turn on the system.

Press  (on/standby)

2 Select the clock set mode.

Press TIMER MENU

select “CLOCK,” and then press

3 Set the time.

Press /

(enter)

Use the same procedure to set the minutes.

Note

power failure occurs.







repeatedlytosetthehour,thenpress




















to turn on the system.

/repeatedly to

(enter).

Adjusting the sound

To adjust the volume

Press VOLUME +/− (orturn the VOLUME control on



.

the unit)

To Press

Generate a more dynamic
sound (Dynamic Sound
Generator X-tra)

Playing a CD/MP3 disc

1 Select the CD function.

Press FUNCTION +/− (or FUNCTION on the unit)



repeatedly.

2 Place a disc.

Press  (open/close)
with the label side up on the disc tray.
Toclosethe disctray,press (open/close)
unit.

this may damage the unit.

3 Start playback.

Press  (play)

To Press

Pause play back

Stop playback

Select a folder on an
MP3 disc

Find a point in a

Select RepeatPlay

To change the play mode

Press PLAY MODErepeatedly while the player is
stopped. You can select normal play (no display or “

(“SHUF” or “
play (“PGM”).

* When playing a CD-DA disc, (SHUF)Play performs the same

operation as normal (SHUF) Play.

Notes on Repeat Play

•

•

it.

Notes on playing MP3 discs

•

•

•

the disc.

•

“.MP3”.

•

malfunction.

•

− folders is 150 (including the root folder).

−

−

−

•

device, and recording media cannot be guaranteed.Incompatible
MP3 discs may produce noise or interrupted audioor may not play
at all.

Notes on playing multisession discs

• Ifthe disc begins with a CD-DA (or MP3) session, it is recognized
as a CD-DA (or MP3) disc, and playback continues untilanother
session is encountered.

• A discwith a mixed CD format is recognized as a CD-DA (audio)
disc.



on the unit, and place a disc



.

 (pause)
press the button again.

 (stop)

+/− (select folder).

/

(or/on the unit)

Hold down/ (rewind/fast
forward)
release the button at the desired
point.

REPEAT
“REP” or “REP1” appears.

SECTION 2

GENERAL



on the unit.

DSGX

EQ.



on the



.Toresumeplay,



.

(go back/go forward)







during playback, and

repeatedly until

.

Listening to the radio

1 Select “TUNER FM” or“TUNER AM.”

Press FUNCTION +/− (or FUNCTION ont he unit)



repeatedly.

2 Select the tuning mode.

Press TUNING MODE
appears.

3 Tune in the desired station.

Press +/− (or TUNING +/− on the unit)
Scanning stops automatically when a stationis tuned
in, and then “TUNED” and “ST” (for stereo programs)
appear.

To stop automatic scanning

Press  (stop).

To tune in a station with a weak signal

If “TUNED” does not appear and the scanning does
not stop, press TUNING MODE
“MANUAL” appears, and then press +/− (or TUNING
+/− on the unit)
station.

To reduce static noise on a weakFM stereo
station

Press FM MODErepeatedly until “MONO” appears



repeatedly until “AUTO”

.



repeatedly until

 repeatedly to tune in the desired

Changing the display

To Press

Change
information on
the display*
Change Display
mode (See below.)

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

−

− ”) duringnormal play.

− artist name (“

− album or folder name (“

− total pl aying time while the player is stopped.

Display mode

Power Saving

1)

Mode

2)

Clock

1)

Youcannot set the clock in Power Saving Mode.

2)

eight seconds.

Notes on the display information

• Charactersthat cannot be displayed appear as “_”.

•

− total playing time for an MP3 disc.

−

•

−

bit rate).

−

Level 2 or Joliet in the expansion format.

•

− total playing time for a CD-DA disc during normal play.

− remaining playing time for a track.

−

version 2 tags are used (ID3 version 2 tag information displayhas
priority when both ID3 version 1 and version 2 tagsare used for a

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

 repeatedly when the

DISPLAY
system is turned on.

 repeatedly when the

DISPLAY

”) during normal play.

”) duringnormal play.

to operate.

This section is extracted
from instruction manual.

Using optional audio components

To connect an optional headphones

ConnectheadphonestothePHONESjackon the
unit.

To connect an optional component

Connect additional audio source componentsto the
AUDIO IN jack
cord (not supplied). Turn down the volume on the
system, and then select the AUDIO IN function.

To connect a DIGITAL MEDIA PORT adaptor

Connect the DIGITAL MEDIA PORT adaptor to the
DMPORT
DIGITAL MEDIA PORT adaptor to an optionalaudio
device (portable audio player, etc.).

Notes on DIGITAL MEDIA PORT adaptor

• Available DIGITAL MEDIA PORT adaptors vary in each area.

• Donot connect an adaptor other than the DIGITAL MEDIA PORT

adaptor.

• Donot connect or disconnect the DIGITAL MEDIA PORT adaptor
to/from the DMPORT

• Whenusing a DIGITAL MEDIA PORT adaptorthat has video
output function, connect the adaptor directlyto the TV.

• For detailsabout the DIGITAL MEDIA PORT adaptor, refer to the
operating instructions supplied with yourDIGITAL MEDIA PORT
adaptor.

1,



on the unit using an analog audio



on the unit. You need to connect the



while the system is on.

6

HCD-EC68P/EC78P

Other Operations

Creating your own CD program
(Program Play)

Usebuttonsontheremoteto createyourownprogram.

1 Press FUNCTION +/− repeatedly to select the CD

function.

2 Press PLAY MODE

while the player is stopped.

3 Press /

track number appears.

repeatedly to select the desired folder,and then select

4 Press

5 Repeat steps 3 through 5 to program additional

6 

tray. To play the same program again, select the CD
function, and then press 

Tocancel Program Play

Press PLAY MODErepeated ly until “PGM”
disappears whilethe player is stopped.

Press CLEAR

To view program information, such as total
track number of the program

Press DISPLAYrepeatedly.

Presetting radio stations

Youcan preset your favorite radio stations and tune
them in instantly by selecting the corresponding preset
number.

1 Tune in the desired station (See “Listening to the

radio”).

2 Press TUNER MEMORY

3 Press +/− (or TUNING +/− on the unit) 

repeatedly to select your desired preset number.

Ifanotherstationisalreadyassignedtotheselected
preset number, the stationis replaced by the new
stations.

4 Press

5 Repeat steps 1 through 4 to store other stations.

preset stations are retained forabout half a day even
if you disconnect the power cord or if a power failure
occurs.

6 To call up a preset radio station, press TUNING

MODE
then press +/− (or TUNING +/− on the unit)
repeatedly to select the desired preset number.



repeatedly until“PGM” appears



repeatedly until the desired

Total playing time of the
selected track





.



while the player is stopped.



.

Preset number



.



repeatedly until“PRESE T” appears, and

+/−





Using the timers

timers, the Sleep Timer has priority.

Use buttonson the remote to use the timer functions.

Sleep Timer:

the clock is not set.

 repeatedly. If you select “AUTO,” the

Press SLEEP

or in 100 minutes.

Play Timer:

Youcan wake up to CD or tuner at a preset time.

Make sure you have set the clock.

1 Prepare the sound source.

Press VOLUME +/−

your own CD program.

2 Press TIMER MENU
3 Press /  repeatedly to select “PLAY SET,” then

press

4 Set the time to start playback.

Press /



above to set the minutes.



5 Use the same procedure as in step 4 to set the time

.

to stop playback.

6 Select the sound source.

Press /
want appears, and then press
shows the timer settings.

7 Press 

If the system is on at the preset time, the Play Timer
will not play.

To activate or check the timer again

1 Press TIMER MENU

2 Press

3 Press

/

press

To cancel the timer

Repeatthesameprocedureasabove until“OFF”appears
in step 3, and then press

To change the setting

Start over from step 1.

Tip

manually.

 to adjust the volume.



.



.

 repeatedly to set the hour, then press

.

 repeatedly until the sound source you





.



.



repeatedly to select “PLAY SEL,” then



.



.

Troubleshooting

1 Make sure the power cord and speaker cords are

2 Find your problem in the checklist below, and take

the indicated corrective action.

If the issue persists, contact your nearest Sony dealer.

If “PROTECT” appears on the display

Immediately unplug the power cord,and check the

• Are the + and − speaker cords short-circuited?

• Is anything blocking the ventilation holes on the top

or back of the system?

tobeallright,reconnectthepower cord,andturnon
the system. If the issue persists, contact your nearest
Sony dealer.

General

The system does not turn on.

• Is the power cord plugged in?

There is no sound.

• Are the + and − speaker cords short-circuited?

• Are you using only the supplied speakers?

• Is anything blocking the ventilationholes on the top or

back of the system?

Sound comes from one channel, or the left and
right volumes are unbalanced.

• Place the speakers as symmetrically as possible.



• Connect only the supplied speakers.

Severe hum or noise.

• Move the system away fromsources of noise.

•

•

cord.

The remote does not function.

• Remove any obstacles betwee n the remote and the

• Point the remote atthe system’s sensor.

• Move the remote closer to the system.

remote sensor



on the unit, and po sition the unit

CD/MP3 player

The sound skips, or the disc will not play.

• Wipe the disc clean, and replace it.

• Move the system to a location awayfrom vibration (for

example, on top of a stable stand).

• Move the speakers away fromt he system, orplace them
on separate stands. At high volume, speaker vibration
may cause the sound to skip.

• Return to Normal Play by pressingPL AY MODE
repeatedly until both “PGM” and“SHUF” disappear.

Starting playback takes more time than usual.

− a disc recorded with a complicatedtree structure.

− a disc recorded in multisession mode.

−

can be added).

− a disc that has many folders.

The disc tray does not open and“LOCKED”
appears.

• Contact your Sony dealer or local authorizedSony
service facility.

To change the AM tuning interval

10 kHz.
Use buttons onthe unit to change the AM tuning
interval.

1

system.

2 Press DISPLAY

3 While holding down TUNING +

All the AM preset stations are erased. Toreset the
interval to the factory preset, repeat the procedure.



to display the clock.

To improve tuner reception

management function. By default, CD power is turned
on.

1 Press FUNCTION +/− (or FUNCTION on the unit) 

repeatedly to select the CD function.



2 Press 

3

to display the clock, and then press  while
holding down 

“CD POWER OFF” appears. With CD player power

CD player power,repeat the procedure until “CD
POWER ON” appears.

To reset the system to factory settings

If the system still does not operate properly, reset the
system to factory settings.
Use buttons on the unitto reset t he unitto its factor y
default settings.

1 Disconnect and reconnect the power cord, and then

turn on the system.

2 Press 

time.

stations, timer, and the clock, are deleted.



.



, FUNCTION, and at the same

Messages

CANNOT LOCK :

you have done the procedure of “Whencarr ying this
system.”

COMPLETE :
FULL :

(steps).

LOCKED :

nearest Sony dealer.

NO DISC :

loaded a disc that cannot be played.

NO STEP : All of the programmed tracks have been

erased.

OVER : Youhave reached the end of the disc while

PUSH STOP : Youpressed PLAY MODE



PROTECT :

READING :

TIME NG :



pressing 

playback.

− Speaker cords may be short-circuited.

−

See “If “PROTECT” appears on the display” to check
what to do if this message appears.

disc. Some buttons are not avai lable.

thesametime.

during playback or pause.



, press .





during

Tuner

Severe hum or noise, or stations cannot be

display.)

• Connecttheantennaproperly.

• Find a location and an orientation that provide good

reception, and then set up the antenna again.

• Keep the antennas away fromt he speaker cordsand the
power cord to avoid picking up noise.

•

7

HCD-EC68P/EC78P

HCD-EC78P: UK model:

Basic Operations

remote,butthesameoperationscanalsobeperformed
usingthebuttonsonthe unithavingthesameor similar
names.

Before using the system

To use the remote

Slide and remove the battery compartment lid ,and
insert the two R6 (size AA) batteries (supplied),  side

Notes on using the remote

• Withnormal use, the batteries should last for about six months.

•

batteries.

• Ifyou do not use the remote for a long period of time, remove the
batteries to avoid damage frombattery le akage and corrosion.

• Batteries installed devicesshall not be exposed to excessive heat such

To set the clock

1 Turn on the system.

Press  (on/standby)

2 Select the clock set mode.

Press TIMER MENU

select “CLOCK,” and then press

3 Set the time.

Press /

(enter)

Use the same procedure to set the minutes.

Note

power failure occurs.



to turn on the system.



/repeatedly to

(enter).



repeatedlytosetthehour,thenpress



Adjusting the sound

To adjust the volume

Press VOLUME +/− (orturn the VOLUME control on



.

the unit)

To Press

Generate a more dynamic
sound (Dynamic Sound
Generator X-tra)

DSGX

EQ.



on the unit.

Playing a CD/MP3 disc

1 Select the CD function.

Press FUNCTION +/− (or FUNCTION on the unit)



repeatedly.

2 Place a disc.

Press  (open/close)
disc with the label side up on the disc tray.To place

shown below.
Toclos e the disc tray, press  (open/close)
unit.

this may damage the unit.

3 Select a disc.

If the discs are currently stopped, press DISC SKIP
Tochange discs while in other func tions,press
DISC 1 − 3

4 Start playback.

Press  (play)
To exchange other discs during playback, press
EX-CHANGE

To Press

Pause playback

Stop playback

Select a folder on an
MP3 disc

Find a point in a

Select RepeatPlay

To change the play mode

Press PLAY MODErepeatedly while the player is
stopped. You can select normal play (no display for all
discs or “1 DISC” for a disc or “

or “
(“PGM”).

* When playing a CD-DA disc, (SHUF)Play performs the same

operation as 1 DISC (SHUF) Play.

Notes on Repeat Play

•

•

time.

•

it.

Notes on playing MP3 discs

•

•

•

the disc.

•

“.MP3”.

•

malfunction.

•

− folders is 150 (including the root folder).

−

−

−

•

device, and recording media cannotbe guaranteed. Incompatible
MP3 discs may produce noise or interrupted audioor may not play
at all.

Notes on playing multisession discs

• Ifthe disc begins with a CD-DA (or MP3) session, it is recognized
as a CD-DA (or MP3) disc, and playback continues untilanother
session is encountered.

• A discwith a mixed CD format is recognized as a CD-DA (audio)
disc.



on the unit, and place a

 on the unit.



.



on the unit.



 (pause)

.Toresumeplay,

press the button again.



.

 (stop)

+/− (select folder).

(go back/go forward)

/

(or/on the unit)

Hold down/ (rewind/fast



during playback, and

forward)
release the button at the desired
point.



repeatedly until

REPEAT
“REP” or “REP1” appears.



on the



Listening to the radio

1 Select “TUNER FM” or“TUNER AM.”

Press FUNCTION +/− (or FUNCTION on the unit)



repeatedly.

2 Select the tuning mode.

Press TUNING MODE
appears.

3 Tune in the desired station.

Press +/− (or TUNING +/ on the unit)
Scanning stops automatically when a stationis tuned
in, and then “TUNED” and “ST” (for stereo programs)
appear.

To stop automatic scanning

Press  (stop).

To tune in a station with a weak signal

If “TUNED” does not appear and the scanning does
not stop, press TUNING MODE
“MANUAL” appears, and then press +/− (or TUNING
+/− on the unit)
station.

To reduce static noise on a weakFM stereo
station

Press FM MODErepeatedly until“MONO” appears



 repeatedly to tune in the desired

Changing the display

To Press

Change
information on
the display*
Change Display



.

mode (See below.)

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

−

− ”) duringnormal play.

− artist name (“

− album or folder name (“

− total playing t ime while the player is stopped.

Display mode

Power Saving

1)

Mode

2)

Clock

1)

Youcannot set the clock in Power Saving Mode.

2)

eight seconds.

.

Notes on the display information

• Charactersthat cannot be displayed appear as “_”.

•

− total playing time for an MP3 disc.

−

•

−

bit rate).

−

Level 2 or Joliet in the expansion format.

•

− total playing time for a CD-DA disc when the play mode is
“1 DISC”.

− remaining playing time for a track.

−

version 2 tags are used (ID3 version 2 tag information displayhas
priority when both ID3 version 1 and version 2 tagsare used for a

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

 repeatedly when the

DISPLAY
system is turned on.

 repeatedly when the

DISPLAY

”) during normal play.

”) duringnormal play.

to operate.

repeatedly until “AUTO”

.



repeatedly until

Using optional audio components

To connect an optional headphones

Connect headphones to the PHONES jackon the
unit.

To connect an optional component

Connect additional audio source componentsto the
AUDIO IN jack
cord (not supplied). Turn down the volume on the
system, and then select the AUDIO IN function.

To connect a DIGITAL MEDIA PORT adaptor

Connect the DIGITAL MEDIA PORT adaptor to the
DMPORT
DIGITAL MEDIA PORT adaptor to an optionalaudio
device (portable audio player, etc.).

Notes on DIGITAL MEDIA PORT adaptor

• Available DIGITAL MEDIA PORT adaptors vary in each area.

• Donot connect an adaptor other than the DIGITAL MEDIA PORT

adaptor.

• Donot connect or disconnect the DIGITAL MEDIA PORT adaptor
to/from the DMPORT

• Whenusing a DIGITAL MEDIA PORT adaptorthat has video
output function, connect t he adaptor directly to the TV.

• For detailsabout the DIGITAL MEDIA PORT adaptor, refer to the
operating instructions supplied with yourDIGITAL MEDIA PORT
adaptor.

1,



on the unit using an analog audio



on the unit. You need to connect t he



while the system is on.

8

HCD-EC68P/EC78P

Other Operations

Creating your own CD program
(Program Play)

Use buttons on the remoteto create your own program.

1 Press FUNCTION +/− (or FUNCTION on the unit) 

repeatedly to select the CD function.

2 Press PLAY MODE

while the player is stopped.

3 Press DISC SKIP
4 Press / (or

repeatedly until the desired track number appears.

repeatedly to select the desired folder,and then selec t

5 Press

6 Repeat steps 3 through 5 to program additional

7 

tray. To play the same program again, select the CD
function, and then press 

Tocancel Program Play

Press PLAY MODErepeated ly until “PGM”
disappears whilethe player is stopped.

Press CLEAR

To view program information, such as total
track number of the program

Press DISPLAYrepeatedly.

Presetting radio stations

Youcan preset your favorite radio stations and tune
them in instantly by selecting the corresponding preset
number.

1 Tune in the desired station (See “Listening to the

radio”).

2 Press TUNER MEMORY

3 Press +/− (or TUNING +/− on the unit) 

repeatedly to select your desired preset number.

Ifanotherstationisalreadyassignedtotheselected
preset number, the stationis replaced by the new
stations.

4 Press

5 Repeat steps 1 through 4 to store other stations.

preset stations are retainedfor about half a day even
if you disconnect the power cord or if a power failure
occurs.

6 To call up a preset radio station, press TUNING

MODE
then press +/− (or TUNING +/− on the unit)
repeatedly to select the desired preset number.



repeatedly until“PGM” appears



to select a disc.

on the unit)

/

Total playing time of the
selected track





.



while the player is stopped.



.

Preset number



.



repeatedly until“PRESE T” appears, and

+/−







Using the timers

timers, the Sleep Timer has priority.

Usebuttonsontheremotetousethetimerfunctions.

Sleep Timer:

the clock is not set.

XK

Press SLEEP

or in 100 minutes.

Play Timer:

Youcan wake up to CD or tuner at a preset time.

Make sure you have set the clock.

1 Prepare the sound source.

2 Press TIMER MENU
3 Press /

4 Set the time to start playback.

5 Use the same procedure as in step 4 to set the time



.

6 Select the sound source.

7 Press 

To activate or check the timer again

1 Press TIMER MENU

2 Press
3 Press /

To cancel the timer

Repeat the same pro cedure as above until “OFF” appears
in step 3, and then press

To change the setting

Start over from step 1.

Tip

manually.

repeatedly.If you select “AUTO,” the

Press VOLUME +/− (or turn VOLUME onthe unit)



to adjust the volume.

your own CD program.

press

Press /



above to set the minutes.

to stop playback.

Press /
want appears, and then press
shows the timer settings.

If the system is on at the preset time, the Play Timer
will not play.

then press



.



repeatedly to select“PLAY SET,” then



.



repeatedly to set the hour, then press

.



repeatedly untilthe sound source you





.



.



repeatedly to select“PLAY SEL,” and



.



.

Troubleshooting

1 Make sure the power cord and speaker cords are

2 Find your problem in the checklist below, and take

the indicated corrective action.

If the issue persists, contact your nearest Sony dealer.

If “PROTECT” appears on the display

Immediately unplug the power cord,and check the

• Are the + and − speaker cords short-circuited?

• Is anything blocking the ventilation holes on the top

or back of the system?

tobeallright,reconnectthepower cord,andturnon
the system. If the issue persists, contact your nearest
Sony dealer.

General

The system does not turn on.

• Is the power cord plugged in?

There is no sound.

• Are the + and − speaker cords short-circuited?

• Are you using only the suppliedsp eakers?

• Is anything blockingt he ventilation holes on the top or

back of the system?

Sound comes from one channel, or the left and
right volumes are unbalanced.

• Place the speakers as symmetrically as possible.

• Connect only the supplied speakers.



Severe hum or noise.

• Move the system awayf romsources of noise.

•

•

cord.

The remote does not function.

• Remove any obstacles between the remote and the

• Point the remote atthe system’s sensor.

• Move the remote closer to the system.

remote sensor



on the unit, and po sition the unit

CD/MP3 player

The sound skips, or the disc will not play.

• Wipe the disc clean, and replace it.

• Move the system to a locationaway from vibration (for

example, on top of a stable stand).

• Move the speakers awayf romthe system, or place them
on separate stands. At high volume,spea kervibration
may cause the sound to skip.

• Return to Normal Play by pressing PLAY MODE
repeatedly until both “PGM” and“SHUF” disappear.

Starting playback takes more time than usual.

•

− a disc recorded with a complicated treestr ucture.

− a disc recorded in multisession mode.

−

can be added).

− a disc that has many folders.

The disc tray does not open and“LOCKED”
appears.

• Contact your Sony dealer or local authorized Sony
service facility.

To change the AM tuning interval

10 kHz.
Use buttons onthe unit to change the AM tuning
interval.

1

system.

2 Press DISPLAY

3 While holding down TUNING +

All the AM preset stations are erased. Toreset the
interval to the factory preset, repeat the procedure.



to display the clock.

To improve tuner reception

management function. By default, CD power is turned
on.

1 Press FUNCTION +/− (or FUNCTION on the unit)

repeatedly to select the CD function.



2 Press 

3

to display the clock, and then press  while
holding down 

“CD POWER OFF” appears. With CD player power

CD player power,repeat the procedure until “CD
POWER ON” appears.

To reset the system to factory settings

If the system still does not operate properly, reset the
system to factory settings.
Use buttons on the unitto reset t he unitto its factor y
default settings.

1 Disconnect and reconnect the power cord, and then

turn on the system.

2 Press 

time.

stations, timer, and the clock, are deleted.



.



, FUNCTION, and at the same

Messages

CANNOT LOCK :

you have done the procedure of“When carr ying this
system.”

COMPLETE :
FULL :

(steps).

LOCKED :

nearest Sony dealer.

NO DISC :

loaded a disc that cannot be played.

NO STEP : All of the programmed tracks have been

erased.

OVER : Youhavereachedthe endofthe discwhile

PUSH STOP : Youpressed PLAY MODE



PROTECT :

READING :

TIME NG :



pressing 

playback.

− Speaker cords may be short-circuited.

−

disc. Some buttons are not availabl e.

the same time.

during playback or pause.

See “If “PROTECT” appears on the display” to check
what to do if this message appears.



, press .







during

Tuner

Severe hum or noise, or stations cannot be

display.)

• Connecttheantennaproperly.

• Find a location and an orientation that provide good

reception, and then set up the antenna again.

• Keep the antennas away fromt he speaker cordsand the
power cord to avoid picking up noise.

•

9

HCD-EC68P/EC78P

• This set can be disassembled in the order shown below.

3-1. DISASSEMBLY FLOW

SET

3-2. SIDE PANEL (L)/(R)
(Page 11)

3-3. PANEL (TOP)
(Page 11)

SECTION 3

DISASSEMBLY

3-5. FRONT PANEL
BLOCK (EC78P: UK)
(Page 12)

3-8. 3 CD MECHANISMBLOCK
(EC78P: UK)
(Page 14)

3-9. BASE UNIT (EC78P: UK)
(Page 14)

3-14. OP BASE ASSY
(KSM-213D)
(Page 17)

(EC78P: UK)

3-4. MAIN BOARD
(Page 12)

3-13. BELT
(EC78P: UK)
(Page 16)

3-6. FRONT PANEL BLOCK
(EC68P/EC78P: US, Canadian)
(Page 13)

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)

3-14. OP BASE ASSY
(KSM-213D)
(Page 17)

(EC68P/EC78P: US, Canadian)

3-7. BACK PANEL
BLOCK
(Page 13)

10

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

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

four screws



(case3 TP)

side panel (L)



two screws



(BVTP3 × 10)

HCD-EC68P/EC78P

two screws



(BVTP3 × 10)

3-3. PANEL (TOP)



(KTP3 × 10)

screw

panel (top)



two claws



two screws



(BVTP3 × 10)



side panel (R)



four screws



(case3 TP)

two screws



(BVTP3 × 10)

screw



(KTP3 × 10)

11

HCD-EC68P/EC78P

3-4. MAIN BOARD

two screws

RG

(BVTP3 × 6)

screw

RB

(BVTP3 × 10)

flexible flat cable (31 core)



(CN803)

flexible flat cable (9 core)



(CN605)

flexible flat cable (11 core)



(CN609)

connector (CN604)



MAIN board

RH

connector (CN151) (EC78P)



flexible flat cable (5 core)



(CN603)

flexible flat cable (5 core)



(CN602) (EC78P)

connector (CN633)



connector (CN601)



two screws

RE

(BVTP3 × 10) (EC78P)

two screws

RT

(BVTP3 × 10)

flexible flat cable (21 core)



(CN608)

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

flexible flat cable



(11 core) (CN609)

flexible flat cable (31 core)



(CN803)

front panel block



flexible flat cable (13 core)



(CN302)

lever

12

door (CD)



flexible flat cable



(9 core) (CN605)

pull the tray by hand.



two screws



(BVTP3 × 10)

gear

Turn a gear by a driver



till a lever falls down
to the position of the figure.

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

flexible flat cable



(11 core) (CN609)

flexible flat cable (31 core)



(CN803)

front panel block



HCD-EC68P/EC78P

door (1 CD)



flexible flat cable



(5 core) (CN001)

3-7. BACK PANEL BLOCK

connector (power cord)



(CN053)

screw



(BVTP3 × 10)

flexible flat cable



(9 core) (CN605)

pull the tray by hand.



two screws



(BVTP3 × 10)

connector (CN601)



Slide the boss by a driver.



two screws



(BVTP3 × 10) (EC78)

two screws



(BVTP3 × 10)

four screws



(BVTP3 × 10)

boss

two screws



(BVTP3 × 10)

back panel block



Cut the clamp.



Note: Please do not forget fixation by clamping
when you install the power cord.

13

HCD-EC68P/EC78P

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

flexible flat cable



(21 core)
(MAIN board: CN608/
CD board: CN201)

3 CD mechanism block





flexible flat cable



(13 core)

two screws (BVWH)



3-9. BASE UNIT (EC78P: UK)

 two screws (PTPWHM2.6)

 two springs (insulator)

 insulator

cover (DLM3)



 insulator

 insulator

four screws



(BVTP3 × 10)

two tapes



Note: When installing the CD mechanism section,
install two tapes for prevention of noise.

 two screws (PTPWHM2.6)

 two springs

(insulator)

 insulator



 base unit

14

3 CD mechanism block

– Bottom view –

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

PT block



two screws



(BVTP4 × 12)

three screws



(BVTP3 × 10)

1 CD mechanism block



flexible flat cable



(21 core) (CN201)

HCD-EC68P/EC78P

connector



(CN053)

two screws



(BVTP4 × 12)

flexible flat cable (5 core)



(CN001)

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

 floating screw

 two floating screws

 two springs (insulator)

 insulator

 two floating screws

 two springs

(insulator)

 insulator

 insulator

 insulator

– Bottom view –



 base unit

loading (BK) assy

15

HCD-EC68P/EC78P

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

position of belt

belt



claw





belt

tray (AU)



3-13. BELT (EC78P: UK)

position of belt

belt



claw

16

belt

two belts (DLM3A)





cover

four screws



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

op base assy



(KSM-213D)

flexible flat cable (16 core)



(CN301)

CD board



HCD-EC68P/EC78P

Remove four solders.



17

HCD-EC68P/EC78P

SECTION 4

TEST MODE

COLD RESET

The 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 [
on.

2. Press three buttons of [x], [FUNCTION] and at last [
multaneously.

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

] button to turn the power

I/1

I/1

] si-

PANEL TEST MODE

Enter The Panel Test Mode

Procedure:

1. In the standby status, press the [
on.

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

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 0”displayed. 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],
[

], and [FUNCTION] simultaneously.

x

] button to turn the power

I/1

CD REPEAT 5 LIMIT CANCEL MODE

Number 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 [

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

3. Press three buttons of [DISPLAY], [
ING] simultaneously.

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

5. To release this mode, press the [

] button to turn the power on.

I/1

I/1

], and [

x

] button to turn the power off.

l m

– TUN-

CD SHIP MODE

This mode can run the CD sled motor optionally. Use this mode,
for instance, when cleaning the optical pick-up.

Procedure:

1. Press the [

2. Confi rm there is no disc in all trays.

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

4. Press two buttons of [CD N] and [

5. Set to the CD ship mode. (chucking on)

6. After blink “STANDBY”, “LOCK” is displayed, disconnect
the AC plug.

] button to turn the power on.

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] simultaneously.

I/1

CD TRAY LOCK

This mode is for the antitheft of CD disc in shop. (not for trans­port)

Procedure:

1. Press the [

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

3. Insert a disc.

4. While pressing the [
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 [

] button for 5 seconds again.

[

Z

8. The message “UNLOCKED” is displayed and the disc tray is
unlocked.

] button to turn the power on.

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] button, press the [Z] button for more 5

x

] button, press the

x

CD POWER MANAGE

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

Procedure:

1. Press the [

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

3. Press the [

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

5. It turns power on and display “CD POWER”, then display
“ON” or “OFF”.

] button to turn the power on.

I/1

] button again to turn the power off (standby).

I/1

] button.

I/1

]

x

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 [

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

3. Press the [

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

5. It turns power on and display “9k STEP” or “10k STEP”, and
thus the tuning interval is changed over.

] button to turn the power on.

I/1

] button again to turn the power off (standby).

I/1

M L

] button, press the [

I/1

] button.

CD SHIP AND COLD RESET

Procedure:

1. Press the [

2. Confi rm 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

5. After blink “STANDBY”, “RESET” is displayed, disconnect
the AC plug.

] button to turn the power on.

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– TUNING] and [

] simultaneously.

I/1

COMMON TEST MODE

Procedure:

1. Press the [

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

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 +
PLAY] simultaneously.

] button to turn the power on.

I/1

M L

], and [DISPLAY] simultaneously.

M L

], and [DIS-

18

HCD-EC68P/EC78P

[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 [

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

3. Press three buttons of [CD N], [
[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], [
[DISPLAY] simultaneously.

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

Key Operation:

[

+], [ –]:

Use these keys to move between the fi ve modes

[DSGX] , [EQ]:
Use these keys to move between the different layers

[TUNING +
Use these keys to move the cursor to the right digit

Press [TUNING +

] button to turn the power on.

I/1

l m

l m

– TUNING] and

– TUNING] and

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
fi ve modes. When [

+] is pressed, the screen ad­vances 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 these
keys also to increase or decrease the numeric value
when changing the numeric value. Pressing [ +]
increases the value and pressing [ –] decreases
the value.

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 lay­er.

M L

], [

l m

– TUNING]:

or to the left digit in the six-digit number, when
changing the numeric value.

M L

to the right, and press [

] to move the cursor

l m

– TUNING] to

return the cursor to the left.

CD Servo Test Mode Tree:

S Curve Mode LD ON
(BDT S CU) (LD ON)

RAM Read Mode
(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)

(OPABRKER) (0000)
SBBT Data value indication
(SBBT DAT) (006C)
FEOOCD value indication
(FEOOCD) (0440)

RAM Write Mode
(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
(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

Disc Type value indication

Op ABRAKE Error

SPG Mask value edit

COMOUT6X value edit command out

value indication

[FUNCTION]:
Use this key to execute Command Out in the Com-

mand Out Mode.

19

HCD-EC68P/EC78P

CD SERVICE MODE

This 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 [

2. Press three buttons of [CD N], [TUNING +
DISPLAY 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 [CD N], [TUN-
ING +

Key Operation:

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

When [

[DISPLAY]:
Use this key to turn the optical pick-up laser power

] button to turn the power on.

I/1

M L

M L

] and DISPLAY simultaneously.

M L

], [

l m

ING +

M L

moves to outer circumference and the message
“SLED OUT” is displayed.

l m

mode, the SLED moves to inner circumference and
the message “SLED IN” is displayed.

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 dis­played.

– TUNING]:

] is pressed in this mode, the SLED

– TUNING] is pressed in this

], and

CD ERROR CODE

The 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 [

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

3. Press three buttons of [TUNING +
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 +
mode increments the number after “M” starting from “M0” up
to “M9”, and then returns to “M0”. Every pressing of the [

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 means
hexadecimal number) on the liquid crystal display as shown
below. In the same way as the CDM error code, use of the
[TUNING +
tons in this mode enables tracing of the error history.

7. To release from this mode, press the [
power off.

] button to turn the power on.

I/1

M L

] and the [

M L

M L

l m

I/1

], [x] and [DIS-

] button in this

l

– TUNING] but-

] button to turn the

Contents of “CDM Errors”

Error display example

M 0 FF 11 42
1 2 3 4

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

0 02 09

D
1 2 3 4

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 specifi ed period of time (time

over)
04: The focus servo is unlocked continuously.
05: Q code cannot be obtained within the specifi ed period of

time.
06: The tracking servo cannot lock-in.
07: Blank disc

01

20