Model Name Using Similar Mechanism

DVD

CDM74D-DVBU23

Base Unit Name

Optical Pick-up Name

TAPE

HCD-GN800

Tape Transport Mechanism Type

Australian Model

2004.06

HCD-GN88D is the amplifier, DVD
player, tape deck and tuner section in
MHC-GN88D.

Amplifier section
The following are measured at AC 120, 127, 220, 240V 50/60 Hz
DIN power output (rated)
Front speaker:

Center speaker:

Surround speaker:

Continuous RMS power output (reference)
Front speaker:

Center speaker:

Surround speaker:

Inputs
GAME (VIDEO):

(phono jack)
GAME (AUDIO):

(phono jacks)

MD/VIDEO (AUDIO) IN:

(phono jacks)

MIC:

(phone jack)

Outputs
AUDIO OUT:

(phono jacks)

VIDEO OUT:

(phono jack)

COMPONENT VIDEO
OUT:

B

B

P

/C

: 0.7 Vp-p, 75 ohms

Y: 1 Vp-p, unbalanced,
Sync negative
C: 0.286 Vp-p load
impedance 75 ohms

accepts headphones of

8 ohms or more

accepts impedance of 6 to 16 ohms

Voltage 250 mV

impedance 1 kilohms

accepts impedance of
8 ohms to 16 ohms

accept impedance of
8 ohms to 16 ohms

2

Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur-

• Do not touch the soldering iron on the same conductor of the

• Be careful not to apply force on the conductor when soldering

CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.

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 PUB-
LISHED BY SONY.

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

Semiconductor laser
(DVD:

Emission duration: continuous

DVD (PCM 48 kHz): 2 Hz – 22 kHz = (

CD: 2 Hz – 20 kHz (

Video color system format NTSC, PAL
(except Latin American models)
DVD DIGITAL OUT (OPTICAL)
(Square optical connector jack, rear panel)
Wave length

Tape player section
Recording system

Frequency response

±3 dB), using Sony TYPE I

Tuner section
FM stereo, FM/AM superheterodyne tuner

87.5 – 108.0 MHz

FM lead antenna

75 ohm unbalanced

10.7 MHz

AM tuner section
Tuning range
North and Latin American models:

530 – 1,710 kHz
(with the interval set at 10 kHz)
531 – 1,710 kHz
(with the interval set at 9 kHz)

531 – 1,602 kHz
(with the interval set at 9 kHz)

531 – 1,602 kHz
(with the interval set at 9 kHz)
530 – 1,710 kHz
(with the interval set at 10 kHz)

AM loop antenna

External antenna terminal

450 kHz

127 V AC, 60 Hz

220 V AC, 50/60 Hz

230 - 240 V AC, 50/60 Hz

120 - 127 V, 220 V or 230 - 240 V AC, 50/60 Hz
Adjustable with voltage selector

220 V AC, 50/60 Hz

120 V, 220 V or 230 - 240 V AC, 50/60 Hz
Adjustable with voltage selector

320 watts

Approx. 280 x 360 x 386.5 mm

Approx. 15.2 kg

Design and specifications are subject to change without notice.

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.)

Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40

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

Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!

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.

It is best to use only unleaded solder but unleaded solder
may also be added to ordinary solder.

3

........................

Location of Controls ............................

3-1. Case .........................................

3-2. Loading (Panel) ................................

3-3. Front Panel Assy ...............................

3-4. Tuner Pack, Sub Trans Board .....................

3-5. DVD Mechanism Deck .......................... 10
3-6. Game In Board, Tape Mechanism Deck ............. 10
3-7. CD Switch Board, Display Board ................. 11
3-8. Volume Board ................................. 11
3-9. Back Panel, Subwoofer Board .................... 12
3-10. Main Board ................................... 12
3-11. Power Amp Board .............................. 13
3-12. Video Board, DMB03 Board, Regulator Board ....... 13
3-13. SW Board, Driver Board ........................ 14
3-14. RF Board, Pick-up Unit ......................... 14
3-15. Sensor Board .................................. 15
3-16. Motor (TB) Board .............................. 15
3-17. Motor (LD) Board .............................. 16

............................... 17

Deck section .................................. 19
Video Section ................................. 22

7-1. Circuit Board Location .......................... 24
7-2. Block Diagram – DVD DSP (1/2) Section – ........ 26

Block Diagram – DVD DSP (2/2) Section – ........ 27
Block Diagram – Tuner/Tape Deck Section – ........ 28
Block Diagram – Main Section – ................. 29
Block Diagram – Amp Section – .................. 30
Block Diagram – Display Section – ............... 31

7-3. Printed Wiring Board – RF Board – ............... 32
7-4. Schematic Diagram – RF Board – ................. 33
7-5. Printed Wiring Board – DVD Mechanism Board – ... 34
7-6. Schematic Diagram – DVD Mechanism Board – ..... 35

7-7. Printed Wiring Board – DMB03 Board (Side A)– .... 36

Printed Wiring Board – DMB03 Board (Side B)– .... 37

7-8. Schematic Diagram – DMB03 Board (1/8) – ........ 38
7-9. Schematic Diagram – DMB03 Board (2/8) – ........ 39
7-10. Schematic Diagram – DMB03 Board (3/8) – ........ 40
7-11. Schematic Diagram – DMB03 Board (4/8) – ........ 41
7-12. Schematic Diagram – DMB03 Board (5/8) – ........ 42
7-13. Schematic Diagram – DMB03 Board (6/8) – ........ 43
7-14. Schematic Diagram – DMB03 Board (7/8) – ........ 44
7-15. Schematic Diagram – DMB03 Board (8/8) – ........ 45
7-16. Printed Wiring Board – Video, Regulator Board – .... 46
7-17. Schematic Diagram – Video, Regulator Board – ..... 47
7-18. Printed Wiring Boards – Main Board – ............. 48
7-19. Schematic Diagram – Main Board (1/4) – .......... 49
7-20. Schematic Diagram – Main Board (2/4) – .......... 50
7-21. Schematic Diagram – Main Board (3/4) – .......... 51
7-22. Schematic Diagram – Main Board (4/4) – .......... 52
7-23. Printed Wiring Boards

– Game In, CD Switch Board – ................... 53

– Game In, CD Switch Board – ................... 54

7-25. Printed Wiring Board – Display Board – ........... 55
7-26. Schematic Diagram – Display Board – ............. 56
7-27. Printed Wiring Board – Power Amp Board – ........ 57
7-28. Schematic Diagram – Power Amp Board – ......... 58
7-29. Printed Wiring Board – Surround Board – .......... 59
7-30. Schematic Diagram – Surround Board – ............ 60
7-31. Printed Wiring Boards – Trans Board – ............ 61
7-32. Schematic Diagram – Trans Board – ............... 62
7-33. IC Block Diagram .............................. 63
7-34. IC Pin Function Description ...................... 68

8-1. Case, Back Panel DMB03 Board Section ........... 79
8-2. Front Panel Section ............................. 80
8-3. Chassis Section ................................ 81
8-4. DVD Mechanism Deck Section-1

(CDM74D-DVBU43) ........................... 82

(CDM74D-DVBU43) ........................... 83

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.

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
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and
check that the S curve waveforms is output three times.

MODEL

E3, E15 models

SP model

MY model

EA model

E51 model

MX model

TH model

AUS model

PH model

•

: Australian model

: 240 V AC Area in E model

: Saudi Arabia model

: Iran model

: Chilean and Peruvian model

: Mexican model

: Philippines model

: Singapore model

: Malaysia model

: Thai model

• This mode let you lock the disc trays. When this mode is acti-

Z

but-

[DISC SKIP/EX-CHANGE]

sage “LOCKED” will be displayed in the will be displayed on
the fluorescent indicator tube.

1. Press

button to turn the set ON.

3. Press

button and

OPEN/CLOSE

and hold down until “LOCKED” or “UNLOCKED” displayed
on the fluorescent indicator tube (around 5 seconds).

NOTES ON DMB03 BOARD EXCHANGE
If a DMB03 board is exchanged, “DRIVE AUTO ADJUSTMENT”
may be unable to be performed. In this case, initialize a memory in
the following procedure.

1. Starting Test Mode (see Supplement-1 page 2).
2. Press the 2 button of remote commander to set the Drive

3. Press the 6 button of remote commander to set the Memory

4. Press the [CLEAR] button of remote commander to initialize

Australian Model

© 2003.06

• MHC-GN800 is composed of following models.

As for the service manual, it is issued for each component model, then, please refer to it.

COMPACT DISC DECK RECEIVER SYSTEM

SPEAKER

FRONT SPEAKER

SYSTEM

SS-RS800

SS-WG800

Part No.

Remark

***********

COMMANDER, STANDARD (RM-SR231)

ANTENNA, LOOP

CONNECTOR (F TYPE ADAPTOR)

CUSHION (FOOT) (For SS-WG800)

COVER BATTERY (For RM-SR231)

FOOT (For SS-GN800/RS800)

MANUAL INSTRUCTION (ENGLISH)(AR,E2,E3,E51,AUS)

MANUAL INSTRUCTION (FRENCH) (E2,E3)

MANUAL INSTRUCTION (SPANISH) (AR,E2,E51,MX)

HCR-GN800SW is composed of HCD-GN800 and SS-WG800.

240 V AC, 50/60Hz

120 V or 127 V AC, 60 Hz

220 V AC, 50/60 Hz

120 V, 220 V or
230 - 240 V AC, 50/60 Hz
Adjustable with voltage selector

250 watts

Approx. 280 x 360 x 386.5 mm

Approx. 13.6 kg

AM loop antenna (1)
Remote commander (1)
Batteries (2)
FM lead antenna (1)
Front speaker pads (8)
Surround speaker pads (8)
Subwoofer pads (4)

Design and specifications are subject to change without notice.

AUS : Australian model
AR : Argentine model
E2

E3

E51 : Chilean and Peruvian model
MX : Mexican model