Sony HCD-EC69 User manual

SERVICE MANUAL
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
HCD-EC69/EC79/EC99
SPECIFICATIONS
COMPACT DISC RECEIVER
9-889-442-03
2009I05-1
© 2009.09
AEP Model
E Model
HCD-EC69/EC79/EC99
Russian Model
HCD-EC69/EC99
Ver. 1.2 2009.09
• HCD-EC69 is the amplifier, USB, CD player and
tuner section in MHC-EC69.
• HCD-EC79 is the amplifier, USB, CD player and
tuner section in MHC-EC79.
• HCD-EC99 is the amplifier, 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)
Highchannel
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)
Highchannel
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)
Highchannel
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)
Highchannel
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 DiodeProperties
Emission Duration: Continuous
Laser Output*: Less than 44.6μW
*
measurement at adistance of 200mm from
the objectivelens surface on the Optical
Pick-up Block with 7mm aperture.
Frequency response: 20 Hz −20 kHz
Signal-to-noise ratio: More than 90 dB
Dynamic range: More than 88 dB
is output is the value
Tuner section
FM stereo, FM/AM superheterodyne tuner Antenna:
FM lead antenna
AM loop antenna
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)
Latin American models:
530 −1,710 kHz (with 10 kHz tuning interval)
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:
Mexican model:
Argentine model:
Other models:
AC 120, 220, 230 −240 V, 50/60 Hz, adjustable with voltage
selector
Power consumption
HCD-EC99: 175 W(0.5 Wat the Power Saving Mode)
HCD-EC79: 170 W(0.5 Wat the Power Saving Mode)
HCD-EC69: 110 W(0.5 Wat 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
Designand specications are subject to changewithoutnotice.
AC 220 V
, 50/60 Hz
AC 127 V, 60 Hz
AC 230 V, 50/60 Hz
Model Name Using Similar Mechanism HCD-EC78
Mechanism Type CDM88A-K6BD90-WOD
Base Unit Name BU-K6BD90-WOD
Optical Pick-up Block Name KSM-213DCP

HCD-EC69/EC79/EC99
2
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
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.
TABLE OF CONTENTS
NOTES ON CHIP COMPONENT REPLACEMENT
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
FLEXIBLE CIRCUIT BOARD REPAIRING
• Keep the temperature of soldering iron around 270 °C during
repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radia-
tion exposure.
This appliance is classified as
a CLASS 1 LASER product.
This marking is located on the
rear or bottom exterior.
SAFETY-RELATED COMPONENT WARNING!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE
WITH MARK 0ON 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.

HCD-EC69/EC79/EC99
3
SECTION 1
SERVICING NOTES
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE 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 flow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated by
the charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
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 [?/1] button to turn the power on.
2. Press the [FUNCTION] button to select CD function.
3. While pressing the [x] button, press the [Z] button for more 5
seconds).
4. The message “UNLOCKED” is displayed and the disc tray is
unlocked.
Note: When “LOCKED” is displayed, the slot lock is not released by turn-
ing power on/off with the [?/1] button.
MODEL IDENTIFICATION
- Back Panel -
Model
Number
Label
Model Part No.
EC69: AEP 4-133-259-0[]
EC69: RU 4-133-260-0[]
EC69: E2, E51 4-133-263-0[]
EC69: MX 4-133-261-0[]
EC69: AR 4-133-262-0[]
EC79: AEP 4-133-249-0[]
EC79: E2, E51 4-133-253-0[]
EC79: MX 4-133-251-0[]
EC79: AR 4-133-252-0[]
EC99: AEP 4-133-243-0[]
EC99: RU 4-133-244-0[]
EC99: E2, E51 4-133-247-0[]
EC99: MX 4-133-245-0[]
EC99: AR 4-133-246-0[]
• Abbreviation
AR : Argentina model
E2 : 120V AC area in E model
E51 : Chilean and Peruvian models
MX : Mexican model
RU : Russian model
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
Ver. 1.2

HCD-EC69/EC79/EC99
4
1Turn a gear by a driver
till a lever rises up
to the position of the figure.
lever
state of opening the CD tray
gear
2Pull the tray by the hand.
Note: Please take out the side panel (R) from a set refer to DISASSEMBLY (page 9).
knob (VOL)
hole
Push the knob (VOL) by the flat head driver.
front panel block
(back view)
HOW TO OPEN THE TRAY WHEN POWER SWITCH TURN OFF
HOW TO REMOVE THE KNOB (VOL)

HCD-EC69/EC79/EC99
5
MAIN board
(Left side view)
MAIN board
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)
In checking the MAIN board, make a capacitor discharge of C622, C626,
C677 and C678 for electric shock prevention.
800 :/2 W
800 :/2 W
Note: Please take out the side panel (L) from a set refer to DISASSEMBLY (page 9).
CAPACITOR DISCHARGE FOR ELECTRIC SHOCK PREVENTION
• 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
6
SECTION 2
GENERAL This section is extracted
from instruction manual.
Guide to parts and controls
similar names.
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
Main Unit

X
RM
RL
RK
RI
RH
RG RE







R
RB
RT
XB
XT
XE
*2HCD-EC99 only
*2

/(on/standby) button
Press to turn on the system.

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.
Press to select the sound eect.

DSGX button

+ (select folder) button
Press to select a folder.

Y(stop) button
Press to stop playback.
R
TUNING + button
Press to tune in the desired station.
Press to select a track or le.
(go forward) button
.(fast forward) button
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.
RK
TUNING − button
Press to tune in the desired station.
Press to select a track or le.
Press to nd a point in a track or le.
(go back) button
N(rewind) button
RL
V(play/pause) button
Presstostartorpauseplayback.
RM
− (select folder) button
Press to select a folder.
Press to select the sound eect.
Press to turn on or o the subwoofer.
X
EQ button
XB
DISPLAY button
Press to change the information on the
display.
XT
(HCD-EC99 only)
SUBWOOFER ON/OFF button
XE
FUNCTION button
Presstoselectthefunction.
Press to nd a point in a track or le.

HCD-EC69/EC79/EC99
7
Remote

/(on/standby) button
Press to turn on the system.

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.
Press to nd a point in a track or le.

N/.(rewind/fast forward) button

Y(stop) button
Presstostopplayback.

ENTER button
Press to enter the settings.

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.
Press to select the sound eect.
RE
EQ button
RG
CLEAR button
Press to delete a pre-programmed track or le.
RH
/(play) button
Presstostartplayback.
9(pause) button
Presstopauseplayback.
Press to select a track or le.
RI
/(go back/go forward) button
+/– (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.
Setting the clock
Usebuttonsontheremotetosetthe
clock.
1 Turn on the system.
Press /.
2 Select the clock set mode.
Press CLOCK/TIMER SET.
repeatedly to select “CLOCK,” and then
press ENTER.
If “PLAY SET” ashes, press /
3 Set the time.
Press /repeatedly to set the
hour, and then press ENTER.
4 Use the same procedure to set the
minutes.
Note
power cord or if a power failure occurs.
e clock settings are lost when you disconnect the
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.

HCD-EC69/EC79/EC99
8
SECTION 3
DISASSEMBLY
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
3-2. SIDE PANEL (L)/(R)
(Page 9)
3-3. PANEL (TOP)
(Page 9)
3-5. FRONT PANEL BLOCK
(Page 10) 3-4. MAIN BOARD (Page 10) 3-6. BACK PANEL BLOCK
(Page 11)
3-10. BELT (DLM3A)
(Page 13)
3-7. CD MECHANISM BLOCK
(Page 11)
3-9. OP BASE ASSY
(KSM-213D)
(Page 12)
3-8. BASE UNIT
(Page 12)
SET

HCD-EC69/EC79/EC99
9
3-3. PANEL (TOP)
2two screws
(BVTP3 u10)
2two screws
(BVTP3 u10)
1four screws
(case3 TP)
5side panel (L)
5side panel (R) 1four screws
(case3 TP)
3two claws
4
4
3two claws
Note: Follow the disassembly procedure in the numerical order given.
3-2. SIDE PANEL (L)/(R)
panel (top)
two claws
two screws
(BVTP3
×10)
two screws
(BVTP3
×10)
screw
(KTP3
×10)
screw
(KTP3
×10)
Lift up the side of the panel (top) in the back and
remove the two claws in front of the panel (top).

HCD-EC69/EC79/EC99
10
3-4. MAIN BOARD
3-5. FRONT PANEL BLOCK
7flexible flat cable
(9 core) (CN605)
5flexible flat cable (29 core)
(CN610)
6flexible flat cable (21 core)
(CN608)
qs front panel
block
9flexible flat cable (13 core)
(CN302)
8flexible flat cable (29 core)
(CN306)
qa three screws
(BVTP3
u8)
2Pull the tray by hand.
q; connector (CN613)
4door (CD)
3five claws
1Turn a gear by a driver
till a lever rises up
to the position of the figure.
lever
state of opening the CD tray
gear
9fan motor connector (CN601)
7connector (EC79/EC99: CN632)
8connector
(EC69/EC99: CN633)
4flexible flat cable (5 core) (CN603)
qf MAIN board
(with REG board)
qd two screws
(BVTP3
u6)
qs screw
(BVTP3
u10)
1flexible flat cable (27 core)
(CN607)
2flexible flat cable (9 core)
(CN605)
3flexible flat cable (21 core)
(CN608)
6connector (EC69/EC79: CN604, EC99: CN654)
q; connector
(CN613)
REG board
5flexible flat cable (7 core)
(EC99: CN643)
qa two screws
(BVTP3
u10)
(EC69)
qa four screws
(BVTP3
u10) (EC79)
qa five screws
(BVTP3
u10) (EC99)
(EC99)
(EC79)
(EC69)

HCD-EC69/EC79/EC99
11
3-6. BACK PANEL BLOCK
5four screws
(BVTP3
u10)
6two screws
(BVTP3
u10)
3screw
(BVTP3
u10) 1fan motor connector
(CN601)
7back panel block
power cord
2Cut the clamp.
Note: Please do not forget fixation by clamping
when you install the power cord.
(EC99)
(EC79)
(EC69)
4two screws
(BVTP3
u10)
(EC69)
4four screws
(BVTP3
u10) (EC79)
4five screws
(BVTP3
u10) (EC99)
3-7. CD MECHANISM BLOCK
four screws
(BVTP3
×10)
two tapes
flexible flat cable (21 core)
(CN201)
flexible flat cable (13 core)
CD mechanism block

Note: When installing the CD mechanism section,
install two tapes for prevention of noise.

HCD-EC69/EC79/EC99
12
3-8. BASE UNIT
3-9. OP BASE ASSY (KSM-213D)
insulator
insulator
base unit
insulator
insulator
two springs
(insulator)
two screws (PTPWHM2.6)
two screws (PTPWHM2.6)

two springs (insulator)
CD mechanism block
(bottom view)
flexible flat cable (16 core)
(CD board: CN301, optical pick-up)
OP base assy
(KSM-213D)
CD board
Remove the four solders.

HCD-EC69/EC79/EC99
13
3-10. BELT (DLM3A)
four screws
CD mechanism block
cover
two belts (DLM3A)
belt
belt
position of belt (top view)

HCD-EC69/EC79/EC99
14
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 [?/1] button to turn the power
on.
2. Press three buttons of [x], [CD] and [?/1] simultaneously.
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 [?/1] button to turn the power
on.
2. Press three buttons of [DISPLAY], [x] and [USB] simultane-
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 [?/1] button to turn the power on.
2. Press the [FUNCTION] button to select CD function.
3. Press three buttons of [DISPLAY], [x] and [TUNING + M
L ] simultaneously.
4. It enters the CD repeat 5 limit cancel mode and displays “NO
LIMIT”.
5. To release this mode, press the [?/1] button to turn the power off.
CD TRAY LOCK
This mode is for the antitheft of CD disc in shop. (not for transport)
Procedure:
1. Press the [?/1] button to turn the power on.
2. Press the [FUNCTION] button to select CD function.
3. Insert a disc.
4. While pressing the [x] button, press the [Z] button for more 5
seconds.
5. The message “LOCKED” is displayed and the disc tray is
locked. (Even if releasing from this mode, the disc tray is still
locked)
6. Ifpressthe[Z]buttontoejectthedisc,themessage“LOCKED”
is displayed and can not eject the disc.
7. To release this lock, while pressing the [x] button, press the
[Z] button for 5 seconds again.
8. The message “UNLOCKED” is displayed and the disc tray is
unlocked.
CD POWER MANAGE
This mode is for switch the CD power supply on/off. Even if this
state pulls out AC plug, it is held.
Procedure:
1. Press the [?/1] button to turn the power on.
2. Press the [FUNCTION] button to select CD function.
3. Press the [?/1] button again to turn the power off (standby).
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 [?/1] button to turn the power on.
2. Press the [FUNCTION] button to select TUNER (AM) func-
tion.
3. Press the [?/1] button again to turn the power off (standby).
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 [?/1] button to turn the power on.
2. Confirm there is no disc in all trays.
3. Press the [FUNCTION] button to select CD function.
4. Press two buttons of [u] and [?/1] simultaneously.
5. Set to the CD ship mode (chucking on).
6. After blink “STANDBY”, “LOCK” is displayed, disconnect
the AC plug.
CD SHIP AND COLD RESET
Procedure:
1. Press the [?/1] button to turn the power on.
2. Confirm there is no disc in all trays.
3. Press the [FUNCTION] button to select CD function.
4. Press three buttons of [CD], [– TUNING l m ] and [?/1]
simultaneously.
5. After blink “STANDBY”, “RESET” is displayed, disconnect
the AC plug.
Ver. 1.2

HCD-EC69/EC79/EC99
15
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 [?/1] button to turn the power on.
2. Press the [FUNCTION] button to select CD function.
3. Press three buttons of [
u ], [TUNING + M L] and
[?/1] 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 [ u ], [TUNING + M L] and
[?/1] 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 five modes
contained in the CD Servo Test Mode, that are the
S-Curve Mode, the RAM Read Mode, the RAM
Write Mode, the Command Out Mode and the Error
Rate Mode as described below.Also, use these keys
to move between the menus within the respective
five modes. When [ +] is pressed, the screen ad-
vances to the next menu or to the next mode. When
[–] is pressed, the screen returns back to the
previous menu or to the previous mode. Use 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 + M L ] to move the cursor
to the right, and press [– TUNING l m ] to
return the cursor to the left.
[FUNCTION]:
Use this key to execute Command Out in the Com-
mand Out Mode.
CD Servo Test Mode Tree:
S Curve Mode LD ON
(BDT S CU) (LD ON)
RAM Read Mode Disc Type value indication
(BDTRAM R) (DISCTYPE) (AL: 0000, RW: 0001)
Gain Index value indication
(GAININDX) (0001)
RFO GAIN value indication
(RFO_GAIN) (0009)
FEO GAIN value indication
(FEO_GAIN) (0005)
SBAD GAIN value indication
(SBAD_GAI) (0007)
TEO GAIN value indication
(TEO_GAIN) (000A)
Disc Size value indication
(DISCSIZE) (0000: Non disc, 0001: 8cm,
0002: 12cm)
Op ABRAKE Error value indication
(OPABRKER) (0000)
SBBT Data value indication
(SBBT DAT) (006C)
FEOOCD value indication
(FEOOCD) (0440)
RAM Write Mode SPG Mask value edit
(BDTRAM W) (00 SPG) (Non mask:00, Mask:01)
Fix RF Gain value edit
(00 FIX) (Non Fix:00, AL Fix:01, RW Fix:02)
TMAX ON value edit
(00 TMA)
Driver Mute OFF value edit
(00 D_M) (Normal:00, Forced OFF:01)
Command Out Mode COMOUT6X value edit command out
(BDT COMO) (COMOUT6X) (000000) (OK)
READ2X value edit command out
(READ2X) (60) (50)
REG READ value edit command out
(REG_READ) (00) (0000)
FEBC? command out
(FEBC?) (00)
FGADD? command out
(FGADD?) (10)
TEBC? command out
(TEBC?) (00)
TGADD? command out
(TGADD?) (00)
RFGC? command out
(RFGC?) (00)
FEOF? command out
(FEOF?) (FFC0)
TEOF? command out
(TEOF?) (FFC0)
TEIOCD1? command out
(TEIOCD1?) (FE80)
TEIOCD2? command out
(TEIOCD2?) (FF40)
TEIOCD3? command out
(TEIOCD3?) (FFC0)
TEOOCD? command out
(TEOOCD?) (FD00)
FEOOCD? command out
(FEOOCD?) (F780)
MONITOR value edit command out
(MONITOR) (570A00) (OK)
Error Rate Mode Error rate indication
(BDT ERR) (00000000)
Higher layer Lower layer of menu hierarchy

HCD-EC69/EC79/EC99
16
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 [?/1] button to turn the power on.
2. Press three buttons of [u], [ +] and [?/1] simultaneously.
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] simultaneously.
Key Operation:
[TUNING +
M L ], [– TUNING l m ]:
Use these keys to move the SLED. When [TUN-
ING +
M L ] is pressed in this mode, the SLED
moves to outer circumference and the message
“SLED OUT” is displayed.
When [– TUNING
l m ] is pressed in this
mode, the SLED moves to inner circumference and
the message “SLED IN” is displayed.
[CD]:
Use this key to turn the optical pick-up laser power
on and off. When the laser power is turned on, the
message “LD ON” is displayed. When the laser
power is turned off, the message “LD OFF” is dis-
played.
CD ERROR 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 [?/1] button to turn the power on.
2. Press the [FUNCTION] button to select CD function.
3. Press three buttons of [ +], [x] and [DISPLAY] simultane-
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 + M L ] button in this
mode increments the number after “M” starting from “M0”
up to “M9”, and then returns to “M0”. Every pressing of the
[– TUNING l m ] 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 [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 + M L ] and the
[– TUNING l m ] buttons in this mode enables tracing of
the error history.
7. To release from this mode, press the [?/1] button to turn the
power off.
Contents of “CDM Errors”
Error display example
M
0 FF 11 42
1234
1It indicates the error history number
0 to 9: The error code number 0 indicates the newest error.
2It 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.
3It 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.
4It 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
D
0 02 09 01
1234
1It indicates the error history number
0 to 9: The error code number 0 indicates the newest error.
2It indicates the error content
01: The focus servo cannot lock-in.
02: GFS is no good (NG).
03: The startup time exceeds the specified period of time (time
over)
04: The focus servo is unlocked continuously.
05: Q code cannot be obtained within the specified period of
time.
06: The tracking servo cannot lock-in.
07: Blank disc
3It 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.

HCD-EC69/EC79/EC99
17
4It indicates the operation that is being processed when the trou-
ble has occurred.
It indicates the step number of each processing specified 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 [?/1] button to turn the power on.
2. Press the [FUNCTION] button to select CD function
3. Press three buttons of [u], [USB] and [?/1] simultaneously.
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.
–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.
(Initialdisplay)
fcsAG**(**:FocusAGCvalue)
trkAG**(**:TrackAGCvalue)
RF-AG**(**:RFAGCvalue)
[DSGX]:
RF gain setting changes whenever the button is
pressed.
“–”: No gain fixation.
“AL”: Fix to the gain for AL disc.
“RW”: Fix to the gain for RW disc.
[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 [?/1] simultaneously.

HCD-EC69/EC79/EC99
18
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 indicat-
ed.
3. Use an oscilloscope with more than 10 MΩimpedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
5. Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
+
–
CD board
oscilloscope
(DC range)
TP121 (RFI)
TP124 (VC)
Procedure :
1. Connect the oscilloscope to TP121 (RFI) and TP124 (VC) on
the CD board.
2. Press the [?/1] button to turn the power on, and press the
[FUNCTION] button to select CD function.
3. Set disc (YEDS-18) and press the [u] button to playback.
4. Confirm that oscilloscope waveform is as shown in the figure
below (eye pattern).
A good eye pattern means that the diamond shape (◊) in the
center of the waveform can be clearly distinguished.
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level:
1.2 ± 0.3 Vp-p
Checking Location:
TP124
(VC)
– CD Board (Conductor Side) –
TP121
(RFI)
IC101
TUNER SECTION 0 dB = 1 μV
Adjustment Location: MAIN board (See page 19)
[AM]
Setting:
FUNCTION: AM
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: 54 dBuV
60 cm
set
loop antenna A loop antenna B
+
–
level meter
32 Ω
JACK board
PHONES jack (J492)
MAIN board
CN801 pin 
[FM]
Setting:
FUNCTION: FM
FM RF signal
generator
75 kHz frequency
deviation by 1 kHz
signal
Output level: as low as possible
(8 dBuV)
+
–
level meter
set
32 Ω
0.01 F
JACK board
PHONES jack (J492)
MAIN board
CN801 pin 
MAIN board
CN801 pin 
digital voltmeter
100 kΩ
MAIN board
IC801 pin XL (TUNER VT)
•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 Reading on Digital
Voltmeter
L803 87.5 kHz 1.75 ± 0.1 V
Confirmation 108 kHz 6.2 ± 0.5 V
FM TRACKING ADJUSTMENT
Adjust for a minimum reading on level meter
L804 98 MHz
Ver. 1.2

HCD-EC69/EC79/EC99
HCD-EC69/EC79/EC99
1919
FM DETECTOR ADJUSTMENT
Setting:
FUNCTION: FM
FM RF signal
generator
Carrier frequency: 98 MHz
Modulation:
deviation by FM 75 kHz
Output level: 60 dBuV
+
–
level meter
MAIN board
JW801 (TUNER-GND)
MAIN board
IC801 pin RT
(TUNER OUT L-ch)
set
MAIN board
CN801 pin 
MAIN board
CN801 pin 
1. Turn the set to 98 MHz.
2. Adjust L802 so that modulation distortion may become the
best in the vicinity of the maximum value where the tuner out
level becomes –15 dBuV or more.
FM AUTO STOP CHECK
generator
SET
+
75 Ω
Procedure :
1. Turn the power on.
2. Input the following signal from Signal Generator to FM an-
tenna input directly.
Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation : 75 kHz
Modulation : 1 kHz
ANT input : 35 dBu (EMF)
Note: Please use 75 ohm “coaxial cable” to connect SG and the set. You
cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.
3. Set to FM tuner function and scan the input FM signal with
automatic scanning.
4. Confirm that input Frequency ofA, B and C detected and auto-
matic scanning stops.
The stop of automatic scanning means “The station signal is re-
ceived in good condition”.
Adjustment Location and Connecting Points:
– MAIN Board (Component Side) –
– MAIN Board (Conductor Side) –
L805
AM Tracking
Adjustment
L804
FM Tracking
Adjustment
L803
FM Frequency
Coverage
Adjustment
L802
FM Detector
Adjustment
IC801 JW801
(TUNER-GND)
IC801 pin RT
(TUNER OUT L-ch)
IC801 pin XL
(TUNER VT)
19
36 18
1
CN801
3
1

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+2VO1-
1IN1 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 8FM IF-IN 22 MPX-IN
1AM 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
16
DI
17
CL
15
CE
18
DO
25
AGC
3
CN801
ANTENNA
FM/AM
1
BAND-PASS
FILTER
FL803
AM
TRACKING
L805
D801
7AM 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)