Sony HCD-EC69, HCD-EC79, HCD-EC99 Service manual

HCD-EC69/EC79/EC99

SERVICE MANUAL

Ver. 1.2 2009.09

• HCD-EC69 is the amplifi er , USB, CD player and
tuner section in MHC-EC69.

• HCD-EC79 is the amplifi er , USB, CD player and
tuner section in MHC-EC79.

• HCD-EC99 is the amplifi er , USB, CD player and
tuner section in MHC-EC99. Photo: HCD-EC99

• “WALKMAN” and “WALKMAN” logo are registered trademarks of Sony Corporation.

• MICROVAULT is a trademark of Sony Corporation.

• MPEG Layer-3 audio coding technology and patents licensed from Fraunhofer IIS and

omson.

• Windows Media is a registered trademark of Microso Corporation in the United States

and/or other countries.

e following measured at AC 230 V, 50/60 Hz (European and
Russian models)
e following measured at AC 120, 127, 220, 240 V, 50/60 Hz
(Other models)

HCD-EC99

Front Speaker:
Power output (rated):

Low channel

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

RMS output power (reference):

Low channel

65 W + 65 W (per channel at 8 Ω, 1 kHz, 10% THD)
High channel
65 W + 65 W (per channel at 8 Ω, 8 kHz, 10% THD)

Subwoofer:
RMS output power (reference):

90 W (at 4 Ω, 80 Hz, 10% THD)

HCD-EC79

Power output (rated):

Low channel

55 W + 55 W (at 8 Ω, 1 kHz, 1% THD)
High channel
55 W + 55 W (at 8 Ω, 8 kHz, 1% THD)

RMS output power (reference):

Low channel

75 W + 75 W (per channel at 8 Ω, 1 kHz, 10% THD)
High channel
75 W + 75 W (per channel at 8 Ω, 8 kHz, 10% THD)

HCD-EC69

Power output (rated):

50 W + 50 W (at 6 Ω, 1 kHz, 1% THD)

RMS output power (reference):

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

Inputs

PC 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-EC79/EC99: 8 Ω
HCD-EC69: 6 Ω

SUBWOOFER (HCD-EC99 only): impedance 4 Ω

USB section

Supported bit rate:

MP3 (MPEG 1 Audio Layer-3)/WMA/AAC: 32 − 320 kbps,
VBR

Sampling frequencies:

MP3 (MPEG 1 Audio Layer-3)/WMA/AAC: 32/44.1/48 kHz

(USB) port:

Maximum current: 500 mA

CD player section

System:

Compact disc and digital audio system

Laser Diode Properties

Emission Duration: Continuous
Laser Output*: Less than 44.6μW

is output is the value

*

measurement at a distance of 200mm from

the objective lens surface on the Optical

Pick-up Block with 7mm aperture.
Frequency response: 20 Hz − 20 kHz
Signal-to-noise ratio: More th
Dynamic range: More than 88 dB

Tuner section

FM stereo, FM/AM superheterodyne tuner Antenna:

FM lead antenna
AM loop antenna

SPECIFICATIONS

Model Name Using Similar Mechanism
Mechanism Type
Base Unit Name
Optical Pick-up Block Name

an 90 dB

AEP Model

E Model

HCD-EC69/EC79/EC99

Russian Model

HCD-EC69/EC99

HCD-EC78
CDM88A-K6BD90-WOD
BU-K6BD90-WOD
KSM-213DCP

FM tuner section:

Tuning range:

87.5 − 108.0 MHz (50 kHz step)

Intermediate frequency: 10.7 MHz

AM tuner section:

Tuning range
European and Russian models:

531 − 1,602 kHz (with 9 kHz tuning interval)

tin American models:

La

530 − 1,710 kHz (with 10
531 − 1,710 kHz (with 9 kHz tuning interval)

Other models:

531 − 1,602 kHz (with 9 kHz tuning interval)
530 − 1,610 kHz (with 10 kHz tuning interval)

Intermediate frequency: 450 kHz

General

Power requirements

European and Russian models:
AC 230 V, 50/60 Hz
Mexican model:
AC 127 V, 60 Hz
Argentine model:

, 50/60 Hz

AC 220 V
Other models:
AC 120, 220, 230 − 240 V, 50/60 Hz, adjustable with voltage
selector

Power consumption

HCD-EC99: 175 W (0.5 W at the Power Saving Mode)
HCD-EC79: 170 W (0.5 W at the Power Saving Mode)
HCD-EC69: 110 W (0.5 W at the Power Saving Mode)

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

Approx. 200 × 306 × 415 mm

Mass (excl. speakers)

HCD-EC99: Approx. 6.5 kg
HCD-EC79: Approx. 6.4 kg
HCD-EC69: Approx. 5.4 kg

Design and specications are subject to change withou

kHz tuning interval)

t notice.

9-889-442-03

2009I05-1

2009.09

©

COMPACT DISC RECEIVER

Sony Corporation

Audio&Video Business Group
Published by Sony Techno Create Corporation

HCD-EC69/EC79/EC99

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 radia-
tion exposure.

This appliance is classifi ed as
a CLASS 1 LASER product.
This marking is located on the
rear or bottom exterior.

TABLE OF CONTENTS

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

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

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 8

3-2. Side Panel (L)/(R) ........................................................... 9

3-3. Panel (Top) ...................................................................... 9

3-4. MAIN Board ................................................................... 10

3-5. Front Panel Block ........................................................... 10

3-6. Back Panel Block ............................................................ 11

3-7. CD Mechanism Block ..................................................... 11

3-8. Base Unit ......................................................................... 12

3-9. OP Base Assy (KSM-213D) ........................................... 12

3-10. Belt (DLM3A) ................................................................ 13

4. TEST MODE ............................................................ 14

5. ELECTRICAL ADJUSTMENTS ........................ 18

6. DIAGRAMS

6-1. Block Diagram - CD, TUNER Section - ........................ 20

6-2. Block Diagram - MAIN Section - ................................... 21

6-3. Block Diagram

- PANEL, POWER SUPLLY Section - ........................... 22

6-4. Printed Wiring Board - CD Board - ................................ 24

6-5. Schematic Diagram - CD Board - ................................... 25

6-6. Printed Wiring Board - USB Board - .............................. 26

6-7. Schematic Diagram - USB Board - ................................. 27

6-8. Schematic Diagram - MAIN Board (1/2) - ..................... 28

6-9. Schematic Diagram - MAIN Board (2/2) - ..................... 29

6-10. Printed Wiring Board - MAIN Board - ........................... 30

6-11. Printed Wiring Boards - AMP Section -.......................... 31

6-12. Schematic Diagram - 2CH-4CH AMP Board - ............... 32

6-13. Schematic Diagram - 3CH AMP Board (EC99) - ........... 33

6-14. Printed Wiring Board - PANEL Board - ......................... 34

6-15. Schematic Diagram - PANEL Board - ............................ 35

6-16. Printed Wiring Boards - AUDIO IN/OUT, KEY,

POWER SUPPLY Section - ............................................ 36

6-17. Schematic Diagram - AUDIO IN/OUT, KEY, POWER

SUPPLY Section - ........................................................... 37

SAFETY-RELATED COMPONENT 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.

2

7. EXPLODED VIEWS

7-1. Panel Section ................................................................... 45

7-2. Front Panel Section ......................................................... 46

7-3. Chassis Section ............................................................... 47

7-4. Main Section ................................................................... 48

7-5. CD Mechanism Section (CDM88A-K6BD90-WOD) .... 49

8. ELECTRICAL PARTS LIST .............................. 50

Accessories are given in the last of the electrical parts list.

SECTION 1

SERVICING NOTES

HCD-EC69/EC79/EC99

Ver. 1.2

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 viscous (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.

MODEL IDENTIFICATION

- Back Panel -

Model
Number
Label

Model Part No.

EC69: AEP
EC69: RU
EC69: E2, E51
EC69: MX
EC69: AR
EC79: AEP
EC79: E2, E51
EC79: MX
EC79: AR
EC99: AEP
EC99: RU
EC99: E2, E51
EC99: MX
EC99: AR

• Abbreviation
AR : Argentina model
E2 : 120V AC area in E model
E51 : Chilean and Peruvian models
MX : Mexican model
RU : Russian model

4-133-259-0[]
4-133-260-0[]
4-133-263-0[]
4-133-261-0[]
4-133-262-0[]
4-133-249-0[]
4-133-253-0[]
4-133-251-0[]
4-133-252-0[]
4-133-243-0[]
4-133-244-0[]
4-133-247-0[]
4-133-245-0[]
4-133-246-0[]

Releasing Procedure:

1. Press [

] button to turn the power on.

?/1

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 by turn-

ing power on/off with the [?/1] button.

3

HCD-EC69/EC79/EC99

HOW TO OPEN THE TRAY WHEN POWER SWITCH TURN OFF

Note: Please take out the side panel (R) from a set refer to DISASSEMBLY (page 9).

state of opening the CD tray

lever

Pull the tray by the hand.

2

HOW TO REMOVE THE KNOB (VOL)

knob (VOL)



gear

front panel block
(back view)

Turn a gear by a driver

1

till a lever rises up
to the position of the figure.

hole

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



4

CAPACITOR DISCHARGE FOR ELECTRIC SHOCK PREVENTION

Note: Please take out the side panel (L) from a set refer to DISASSEMBLY (page 9).
In checking the MAIN board, make a capacitor discharge of C622, C626,

C677 and C678 for electric shock prevention.

800 :/2 W

MAIN board

800 :/2 W

C626 (EC69/EC79: AEP/EC99: AEP, RU)
C678 (EC79: E2, E51, MX, AR/
E99: E2, E51, MX, AR)

C622 (E69/E79: AEP/EC99: AEP , RU)
C677 (EC79: E2, E51, MX, AR/
E99: E2, E51, MX, AR)

• Abbreviation
AR : Argentina model
E2 : 120V AC area in E model
E51 : Chilean and Peruvian models
MX : Mexican model
RU : Russian model

HCD-EC69/EC79/EC99

MAIN board

(Left side view)

5

HCD-EC69/EC79/EC99

SECTION 2

GENERAL

This section is extracted
from instruction manual.

Guide to parts and controls

is manual mainly explains operations using the remote, but tha same operations can also be performed using the buttons on the unit having the same or
similar names.

Main Unit



/ (on/standby) button

Press to turn on the system.





XE

2

*

XT
XB
X
RM

RL
RK

RI

RH
RG

R

TUNING + button

Press to tune in the desired station.









R

RB
RT

RE

*2 HCD-EC99 only

RK

TUNING − button

Press to tune in the desired station.



Remote sensor



CD button

Press to select the CD function.



DISC 1 − 3 buttons

Press to select a disc. Press to switch to the CD
function from other function.



USB button

Press to select the USB function.



DSGX button

Press to select the sound eect.



+ (select folder) button

Press to select a folder.



Y (stop) button

Press to stop playback.

 (go forward) button

Press to select a track or le.

. (fast forward) button

Press to nd a point in a track or le.

RB

; (open/close) button

Press to insert and eject a disc.

RT

VOLUME control

Turn to adjust the volume.

RE

(USB) port

Connect an optional USB device.

RG

PHONES jack

Connect the headphones.

RH

PC IN jack

Connect an audio component (Portable audio
player, etc.).

RI

DISC SKIP/EX-CHANGE button

Press to select a disc. Press to exchange a disc
while playing.

 (go back) button

Press to select a track or le.

N (rewind) button

Press to nd a point in a track or le.

RL

V (play/pause) button

Presstostartorpauseplayback.

RM

− (select folder) button

Press to select a folder.

X

EQ button

Press to select the sound eect.

XB

DISPLAY button

Press to change the information on the
display.

XT

(HCD-EC99 only)
SUBWOOFER ON/OFF button

Press to turn on or o the subwoofer.

XE

FUNCTION button

Presstoselectthefunction.

6

HCD-EC69/EC79/EC99

Remote



/ (on/standby) button

Press to turn on the system.



DISC SKIP button

Press to select a disc.

R

+ (select folder) button

Press to select a folder.

RB

VOLUME +/− button

Press to adjust the volume.

RT

− (select folder) button

Press to select a folder.

RE

EQ button

Press to select the sound eect.

RG

CLEAR button

Press to delete a pre-programmed track or le.

RH

/ (play) button

Presstostartplayback.

9 (pause) button

Presstopauseplayback.

Setting the clock

Usebuttonsontheremotetosetthe
clock.

1

Turn on the system.

Press /.

2

Select the clock set mode.

Press CLOCK/TIMER SET.
If “PLAY SET” ashes, press /

repeatedly to select “CLOCK,” and then
press ENTER.

3

Set the time.

Press / repeatedly to set the
hour, and then press ENTER.

4

Use the same procedure to set the
minutes.

Note

e clock settings are lost when you disconnect the
power cord or if a power failure occurs.

To display the clock when the system is off

Press DISPLAY repeatedly until the clock is
displayed. e clock is displayed for about 8
seconds.



CLOCK/TIMER SELECT button
CLOCK/TIMER SET button

PresstosettheclockandthePlayTimer.



REPEAT/FM MODE button

Press to listen to a disc, a USB device, a single
track or lr repeatedly.
Press to select the FM reception mode
(monaural or stereo).



TUNER/BAND button

Press to select the TUNER function.
Press to select FM or AM reception mode.



FUNCTION button

Presstoselectthefunction.



N/. (rewind/fast forward) button

Press to nd a point in a track or le.



Y (stop) button

Presstostopplayback.



ENTER button

Press to enter the settings.

RI

/ (go back/go forward) button

Press to select a track or le.

+/– (tuning) button

Press to tune in the desired station.

RK

USB button

Press to select the USB function.

RL

CD button

Press to select the CD function.

RM

TUNER MEMORY button

Press to preset the radio station.

X

PLAY MODE/TUNING MODE button

Press to select the play mode of a CD or MP3 disc.
Press to select the tuning mode.

XB

DISPLAY button

Press to change the information on the display.

XT

SLEEP button

Press to set the Sleep Timer.

7

HCD-EC69/EC79/EC99

DISASSEMBLY

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

3-1. DISASSEMBLY FLOW

SET

3-2. SIDE PANEL (L)/(R)
(Page 9)

3-3. PANEL (TOP)
(Page 9)

SECTION 3

3-5. FRONT PANEL BLOCK
(Page 10)

3-7. CD MECHANISM BLOCK
(Page 11)

3-8. BASE UNIT
(Page 12)

3-9. OP BASE ASSY
(KSM-213D)
(Page 12)

3-4. MAIN BOARD
(Page 10)

3-10. BELT (DLM3A)
(Page 13)

3-6. BACK PANEL BLOCK
(Page 11)

8

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

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

two claws

3

4

four screws

1

(case3 TP)

two screws

2

(BVTP3 u 10)

two claws

3

HCD-EC69/EC79/EC99

two screws

2

(BVTP3 u 10)

side panel (L)

5

3-3. PANEL (TOP)

Lift up the side of the panel (top) in the back and



remove the two claws in front of the panel (top).

panel (top)



two claws



side panel (R)

5

4

four screws

1

(case3 TP)

two screws



(BVTP3 × 10)



(BVTP3 × 10)

screw



(KTP3 × 10)

two screws

screw



(KTP3 × 10)

9

HCD-EC69/EC79/EC99

3-4. MAIN BOARD

MAIN board

qf

(with REG board)

two screws

qd

(BVTP3 u 6)

screw

qs

(BVTP3 u 10)

6

REG board

connector (EC69/EC79: CN604, EC99: CN654)

flexible flat cable (5 core) (CN603)

4

connector (EC79/EC99: CN632)

7

fan motor connector (CN601)

9

four screws

qa

(BVTP3 u 10) (EC79)

five screws

qa

(BVTP3 u 10) (EC99)

(EC99)

(EC79)

(EC69)

two screws

qa

(BVTP3 u 10)
(EC69)

flexible flat cable (27 core)

1

(CN607)

flexible flat cable (9 core)

2

(CN605)

3

(CN608)

connector

q;

(CN613)

flexible flat cable (21 core)

3-5. FRONT PANEL BLOCK

flexible flat cable (29 core)

5

(CN610)

flexible flat cable (21 core)

6

(CN608)

connector (CN613)

q;

connector

8

(EC69/EC99: CN633)

flexible flat cable (7 core)

5

(EC99: CN643)

flexible flat cable (13 core)

9

(CN302)

10

front panel

qs

block

five claws

3

door (CD)

4

flexible flat cable

7

(9 core) (CN605)

Pull the tray by hand.

2

three screws

qa

(BVTP3 u 8)

flexible flat cable (29 core)

8

(CN306)

state of opening the CD tray

lever

Turn a gear by a driver

gear

1

till a lever rises up
to the position of the figure.

3-6. BACK PANEL BLOCK

screw

3

(BVTP3 u 10)

fan motor connector

1

(CN601)

power cord

five screws

4

(BVTP3 u 10) (EC99)

Cut the clamp.

2

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

two screws

6

(BVTP3 u 10)

HCD-EC69/EC79/EC99

four screws

4

(BVTP3 u 10) (EC79)

(EC99)

(EC79)

(EC69)

two screws

4

(BVTP3 u 10)
(EC69)

four screws

5

(BVTP3 u 10)

3-7. CD MECHANISM BLOCK

flexible flat cable (21 core)



(CN201)

back panel block

7

CD mechanism block



flexible flat cable (13 core)





four screws



(BVTP3 × 10)

two tapes



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

11

HCD-EC69/EC79/EC99

3-8. BASE UNIT

 two screws (PTPWHM2.6)

 two springs (insulator)

 two screws (PTPWHM2.6)

 insulator

 two springs

(insulator)

 insulator

 insulator

3-9. OP BASE ASSY (KSM-213D)

 insulator



CD mechanism block
(bottom view)

 OP base assy (KSM-213D)

 base unit

12

Remove the four solders.



CD board



 flexible flat cable (16 core)

(CD board: CN301, optical pick-up)

3-10. BELT (DLM3A)

position of belt (top view)

belt



HCD-EC69/EC79/EC99

cover

belt

two belts (DLM3A)



four screws



CD mechanism block

13

HCD-EC69/EC79/EC99

Ver. 1.2

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 [

] button to turn the power

?/1

on.

2. Press three buttons of [

], [CD] and [

x

] simultaneously.

?/1

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

PANEL TEST MODE
Enter The Panel Test Mode
Procedure:

1. In the standby status, press the [

] button to turn the power

?/1

on.

2. Press three buttons of [DISPLAY], [

] and [USB] simultane-

x

ously.

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”.

3. From this status, press the [u] button, and the destination and
model name are displayed.

4. To release from this mode, press three buttons of [DISPLAY],
[x] and [USB] 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 [x] 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],
[x] and [USB] simultaneously.

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 [

] button to turn the power on.

?/1

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

3. Press three buttons of [DISPLAY], [x] and [TUNING +

L

] simultaneously.

M

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 off.

?/1

CD TRAY LOCK

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

Procedure:

1. Press the [

] button to turn the power on.

?/1

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 releasing 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

] button, press the

x

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 this
state pulls out AC plug, it is held.

Procedure:

1. Press the [

] button to turn the power on.

?/1

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

3. Press the [

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

?/1

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

?/1

] button.

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

CHANGE-OVER THE AM TUNING INTERVAL
(Except EC69: AEP, Russian/EC79: AEP/EC99: AEP and
Russian models)

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

Procedure:

1. Press the [

] button to turn the power on.

?/1

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

3. Press the [

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

?/1

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

M L

] button, press the [

?/1

] button.

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

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 [

] button to turn the power on.

?/1

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

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

4. Press two buttons of [u] and [

] simultaneously.

?/1

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

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

14

CD SHIP AND COLD RESET
Procedure:

1. Press the [

] button to turn the power on.

?/1

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

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

4. Press three buttons of [CD], [– TUNING

l m

] and [

?/1

simultaneously.

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

]

HCD-EC69/EC79/EC99

CD SERVO TEST MODE

This mode can check the servo system operations of the optical
pick-up system (= optical unit + CD board).

Note 1: Do not enter the this mode while any other test mode is in prog-

ress.

Note 2: Do not enter any other test mode while the this mode is in prog-

ress.

How to Enter the CD Servo Test Mode
Procedure:

1. Press the [

] button to turn the power on.

?/1

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

3. Press three buttons of [
] simultaneously.

[

?/1

u

], [TUNING + M L] and

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 [u], [TUNING + M L] and

[

] simultaneously.

?/1

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

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.

[DSGX], [USB]:
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 [USB] to move up to the higher
layer.

[TUNING +

M L

], [– TUNING

l m

]:

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 +

to the right, and press [– TUNING

M L

] to move the cursor

l m

] 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.

15

HCD-EC69/EC79/EC99

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 [u], [ +] and [

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

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

5. To release from this mode, press three buttons of [u], [
and [

?/1

Key Operation:

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

When [– TUNING

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

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 [
ously.

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
[– TUNING
number after “M”. The smaller the error code number is, the
newer the error content is.

6. When the [CD] 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 +
[– TUNING
the error history.

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

Contents of “CDM Errors”

Error display example

M

0 FF 11

1 2 3 4

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

] button to turn the power on.

?/1

] simultaneously.

?/1

] simultaneously.

M L

?/1

], [– TUNING

M L

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

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.

] button to turn the power on.

l m

l m

42

] button in this mode decrements the

] buttons in this mode enables tracing of

l m

] is pressed in this mode, the SLED

l m

+], [x] and [DISPLAY] simultane-

]:

] is pressed in this

M L

] button in this

M L

] button to turn the

?/1

] and the

+]

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

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 + CD 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.

01

16

HCD-EC69/EC79/EC99

4 It indicates the operation that is being processed when the trou-

ble has occurred.

It indicates the step number of each processing specifi ed by 3.

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 this mode while any other test mode is in prog-

ress.

Note2: Do not enter any other test mode while the this mode is in prog-

ress.

Procedure:

1. Press the [

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

3. Press three buttons of [u], [USB] and [

4. It enters the CD factory mode and the message “FACTORY”
is displayed. When the [CD] button is pressed four times, the
following message (initial display) is displayed.

] button to turn the power on.

?/1

] simultaneously.

?/1

–X1ON

S character mode setting
Tracking servo setting
RF gain setting

Key Operation:

[CD]:
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 fi xation.
“AL”: Fix to the gain for AL disc.
“RW”: Fix to the gain for RW disc.

[USB]:
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 three buttons of [u], [USB]

and [

] simultaneously.

?/1

17

HCD-EC69/EC79/EC99

Ver. 1.2

SECTION 5

ELECTRICAL ADJUSTMENTS

CD SECTION

Note:

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

2. Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicat­ed.

3. Use an oscilloscope with more than 10 MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specifi ed value with the following checks.

5. Check the focus bias check when optical pick-up block is replaced.

FOCUS BIAS CHECK

oscilloscope

(DC range)

CD board

TP121 (RFI)

TP124 (VC)

+
–

Procedure :

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

2. Press the [

] button to turn the power on, and press the

?/1

[FUNCTION] button to select CD function.

3. Set disc (YEDS-18) and press the [u] button to playback.

4. Confi rm that oscilloscope waveform is as shown in the fi gure
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 mV
TIME/DIV: 500 ns

level:

1.2 ± 0.3 Vp-p

TUNER SECTION

0 dB = 1 μV

Adjustment Location: MAIN board (See page 19)

[AM]
Setting:

FUNCTION: AM

60 cm

loop antenna A

AM RF signal
generator

30% amplitude
modulation by
400 Hz signal

Output level: 54 dBuV

loop antenna B

set

MAIN board
CN801 pin 

32 Ω

JACK board
PHONES jack (J492)

[FM]
Setting:

FUNCTION: FM

FM RF signal

generator

0.01 F

75 kHz frequency
deviation by 1 kHz
signal
Output level: as low as possible
(8 dBuV)

MAIN board
CN801 pin 

set

MAIN board
CN801 pin 

digital voltmeter

level meter

32 Ω

JACK board
PHONES jack (J492)

level meter

+
–

+
–

Checking Location:

– CD Board (Conductor Side) –

TP124

(VC)

TP121

(RFI)

IC101

MAIN board

IC801 pin XL (TUNER VT)

100 kΩ

• Repeat the procedures in each adjustment several times.

( ): EC69: AEP, Russian/EC79: AEP/

EC99: AEP and Russian models

AM FREQUENCY COVERAGE CONFIRMATION

Frequency Display Reading on Digital Voltmeter
530 kHz (531 kHz) 1.45 ± 0.3 V

1,710 kHz (1,602 kHz) 7.7 ± 0.5 V (7.2 ± 0.5 V)

( ): EC69: AEP, Russian/EC79: AEP/

EC99: AEP and Russian models

AM TRACKING ADJUSTMENT

Adjust for a maximum reading on level meter

L805 530 kHz (531 kHz)

FM FREQUENCY COVERAGE ADJUSTMENT

Adjustment Part Frequency Display

L803 87.5 kHz 1.75 ± 0.1 V

Confi rmation 108 kHz 6.2 ± 0.5 V

Reading on Digital

Voltmeter

18

FM TRACKING ADJUSTMENT

Adjust for a minimum reading on level meter

L804 98 MHz

HCD-EC69/EC79/EC99

HCD-EC69/EC79/EC99

1919

FM DETECTOR ADJUSTMENT
Setting:

FUNCTION: FM

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 –15 dBuV or more.

FM AUTO STOP CHECK

Procedure :

1. Turn the power on.

2. Input the following signal from Signal Generator to FM an­tenna 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. Confi rm that input Frequency of A, B and C detected and auto-
matic scanning stops.

The stop of automatic scanning means “The station signal is re­ceived in good condition”.

Adjustment Location and Connecting Points:

FM RF signal

generator

Carrier frequency: 98 MHz
Modulation:
deviation by FM 75 kHz
Output level: 60 dBuV

MAIN board
CN801 pin 

set

MAIN board
CN801 pin 

MAIN board
IC801 pin RT
(TUNER OUT L-ch)

level meter

+
–

MAIN board
JW801 (TUNER-GND)

generator

SET

+

75 Ω

– MAIN Board (Component Side) –

L802

FM Detector

Adjustment

L804

FM Tracking

Adjustment

AM Tracking

Adjustment

L803

FM Frequency

Coverage

Adjustment

L805

– MAIN Board (Conductor Side) –

3

CN801

1

IC801

(TUNER OUT L-ch)

IC801 pin XL
(TUNER VT)

36

1

IC801 pin RT

19
18

JW801

(TUNER-GND)

HCD-EC69/EC79/EC99

HCD-EC69/EC79/EC99

2020

SECTION 6

DIAGRAMS

6-1. BLOCK DIAGRAM - CD, TUNER Section -

OPTICAL PICK-UP BLOCK

(KSM-213DCP)

B
C
D
E

A

F

SP+

SP-

LD

PD

VC

AUTOMATIC

POWER

CONTROL

Q301

FOCUS/TRACKING COIL DRIVE,

SLED/SPINDLE MOTOR DRIVE

IC401

CD-MP3 PROCESSOR

IC101

VO1+2
VO1-

1

IN1

3

SL+

SL-

VO2-12
VO2+

11

IN2’

9

T+

T-

VO3+18
VO3-

17

IN3’

20

F+

F-

CD

MECHANISM

DECK

M1-

M1+

VO4+26
VO4-

27

IN4’

24

MUTE 7

97 FPi1 (B)
94 FNi2 (C)
96 FPi2 (D)

100

TNi (E)

95 FNi1 (A)

98 TPi (F)

91 LDo

MDi

84 VRo

13 DMo

92

12 FMo

10 TRo

9FOo

XO

XI

X102

16.9344MHz

S201

(LIMIT)

CD +3.3V

24

23

IO0 (/HSO)

20

LO CD-L30

RO R-CH27

BUS0 38
BUS1 39

I/O-CD-BUS0

17

I/O-CD-BUS1

18

BUS2 (SO) 40

BUS3 (SI) 41

I/O-CD-BUS219
I/O-CD-BUS3

20

O-CD-BUCK

25

O-CD-CCE

26

XRST

37 O-CD-RST27

O-DR-MUTE

23

I-REQ

24

SBSY

54

O-3CD-M1+

8

O-3CD-M1- 10

M2-

M2+

O-3CD-M2+

11

O-3CD-M2- 12

O-CD-SBSY

43

A

B

MOTOR

DRIVE

Q311 - 318

SW2

SW1

I-3CD-SW1

7

I-3CD-SW2

6

I-STOCK

SW3

I-3CD-SW3

5

I-3CD-STOCK

22

I-CHACK

I-3CD-CHACK

21

I-CLOSE

I-OPEN

I-3CD-CLOSE/OPEN

45

AM/FM-DET, OSC, MIX, PLL, IF AMP

IC801

36

FM RF-IN

8

FM IF-IN

22

MPX-IN

1

AM RF-IN

48

I-TU-DO

57

O-TU-CLK

55

O-TU-CE

56

O-TU-DI

39

I-TU-ANSD

X801

75kHz

2019

XIN

XOUT

16DI17CL15

CE

18

DO25AGC

3

CN801

ANTENNA

FM/AM

1

BAND-PASS

FILTER

FL803

AM

TRACKING

L805

D801

7

AM IF-IN

T801

AM IF

34

FM RF-OUT

FM

TRACKING

L804

32

FM-OSC

FM FREQUENCY

COVERAGE

L803

+9V

11

FM-DET

FM

DETECTOR

L802

3FM-MIX 23FM DET-OUT 12L-OUT

13

R-OUT R-CH

TUNER-L

5

AM-MIX

24

AM DET-OUT

CF801

• SIGNAL PATH

: CD PLAY

• R-ch is omitted due to same as L-ch.

: TUNER (FM/AM)

SYSTEM CONTROLLER

IC301 (1/3)

42BUCK (CLK)
43XCCE
48PIO0

(Page 21)

(Page 21)