Sony HCD-GN88D - User Manual

SERVICE MANUAL
Model Name Using Similar Mechanism NEW
DVD
DVD Mechanism Type CDM74D-DVBU23
Section
Base Unit Name DVBU23
Optical Pick-up Name TDP022W
TAPE
Model Name Using Similar Mechanism HCD-GN800
Section Tape Transport Mechanism Type CWM43RR23
MiNi Hi-Fi COMPONENT SYSTEM
E Model
Australian Model
HCD-GN88D
Ver 1.2 2004.03
9-877-457-03 Sony Corporation
2004C02-1 Home Audio Company
C 2004.03 Published by Sony Engineering Corporation
SPECIFICATIONS
HCD-GN88D is the amplifier, DVD
player, tape deck and tuner section in
MHC-GN88D.
– Continued on next page –
Amplifier section
The following are measured at AC 120, 127, 220, 240V 50/60 Hz
DIN power output (rated)
Front speaker: 185 + 185 watts
(6 ohms at 1 kHz, DIN)
Center speaker: 50 watts
(8 ohms at 1 kHz, DIN)
Surround speaker: 50 + 50 watts
(8 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
Front speaker: 235 + 235 watts
(6 ohms at 1 kHz, 10% THD)
Center speaker: 70 watts
(8 ohms at 1 kHz, 10% THD)
Surround speaker: 70 + 70 watts
(8 ohms at 1 kHz, 10% THD)
Inputs
GAME (VIDEO): 1 Vp-p, 75 ohms
(phono jack)
GAME (AUDIO): Voltage 250 mV,
(phono jacks) impedance 47 kilohms
MD/VIDEO (AUDIO) IN: voltage 450 mV/250 mV,
(phono jacks) impedance 47 kilohms
MIC: sensitivity 1 mV,
(phone jack) impedance 10 kilohms
Outputs
AUDIO OUT: Voltage 250 mV
(phono jacks) impedance 1 kilohms
VIDEO OUT: max. output level 1 Vp-p,
(phono jack) unbalanced, Sync.
negative load impedance
75 ohms
COMPONENT VIDEO
OUT: Y: 1 Vp-p, 75 ohms
PB/CB: 0.7 Vp-p, 75 ohms
PB/CR: 0.7 Vp-p, 75 ohms
S VIDEO OUT
(4-pin/mini-DIN jack): Y: 1 Vp-p, unbalanced,
Sync negative
C: 0.286 Vp-p load
impedance 75 ohms
PHONES: accepts headphones of
(stereo mini jack) 8 ohms or more
FRONT SPEAKER: accepts impedance of 6 to 16 ohms
SUBWOOFER OUT: Voltage 250 mV
(phono jack) impedance 1 kilohms
SURROUND SPEAKER: accepts impedance of
8 ohms to 16 ohms
CENTER SPEAKER: accept impedance of
8 ohms to 16 ohms

Summary

SECTION 1 SERVICING NOTES

Servicing Notes Details

Handling precautions for optical pick-up, laser diode emission check, and tray lock mode.

SECTION 3 DISASSEMBLY

Disassembly Steps: Case, Panel, Front

Procedures for disassembling the case, panel, and front assembly.

Disassembly Steps: Mechanism Decks & Boards

Disassembly Steps: Boards (Back Panel, Main)

Disassembly Steps: Final Boards

SECTION 4 TEST MODE

Test Mode Navigation and GC;MC Modes

Instructions for entering Test Mode, GC Test Mode, and MC Test Mode.

Specific Test Mode Functions

Details on test modes like Cold Reset, VACS ON/OFF, DVD modes, and MD/Video switching.

SECTION 5 MECHANICAL ADJUSTMENTS

Mechanical Adjustments and Torque Measurement

Precautions and torque specifications for mechanical adjustments.

SECTION 6 ELECTRICAL ADJUSTMENTS

Deck Section and Head Adjustments

Electrical adjustments for the deck section and head azimuth alignment.

Tape Speed Adjustment (Deck B)

Procedure for adjusting tape speed on Deck B.

Record Level and Bias Adjustments (Deck B)

VIDEO SECTION

Servo Circuit Re-adjustment

Video Level Check

SECTION 8 EXPLODED VIEWS

Exploded Views: Case and Panel Assemblies

Exploded View: Chassis Section

Exploded View: DVD Mechanism Deck

Sony HCD-GN88D Specifications

General

CD Player	Yes
Tuner	FM/AM
Bluetooth	No
USB Playback	Yes
Speaker Type	2-Way Bass Reflex
Cassette Deck	Yes
Remote Control	Yes
Type	Mini Hi-Fi System
Functions	CD, USB
USB Port	1