Sony hcd gsx 75 service manual

Page 1

HCD-GSX75

SERVICE MANUAL

Ver. 1.3 2005.05

HCD-GSX75 is the Amplifier, CD player, Tape
Deck and Tuner section in MHC-GSX75.

US Model
Canadian Model

Model Name Using Similar Mechanism HCD-GS300AV
CD CD Mechanism Type CDM64C-K1BD47B
Section Base Unit Name BU-K1BD47B
Optical Pick-up Name KSM-213BFN
TAPE Model Name Using Similar Mechanism HCD-GSBDOAV
Section Tape Transport Mechanism Type CMAL12234A

SPECIFICATIONS

Main Unit

Amplifier section

For the U.S. model

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC

DISTORTTON:

With 6-ohm loads, both channels driven, from 120 - 10,000 Hz; rated 150
watts per channel minimum RMS power, with no more than 10% total
harmonic distortion from 250 milliwatts to rated output.

Continuous RMS power output (reference):
150 + 150 W
(6 ohms at 1 kHz, 10% THD)
Total harmonic distortion less than 0.09%
(6 ohms at 1 kHz, 70W)
Inputs
VIDEO (MD) IN (phono jacks):
voltage 250/450 mV, impedance 47 kilohms
AUDIO IN (phono jacks): 450 mV, impedance 47 kilohms
Outputs
VIDEO OUT (phono jacks):
max. output level 1Vp-p, unbalanced, Sync
negative, load impedance 75 ohms
PHONES (stereo phone jack):
accepts headphones of 8 ohms or more

SPEAKER: accepts impedance of 6 to 16 ohms
9-877-216-04 Sony corporation

2005E0271 Audio Group

©2005.05 Published by Sony Engineering Corporation

CD player section
System
Laser

Compact disc and digital audio system
Semiconductor laser

(CD: 1:780 nm)

Emission duration:

continuous
Frequency response CD: 20 Hz - 20 kHz
(:05 dB)
Wavelength 780 - 790 nm
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
OPTICAL OUT (CD)
(Square optical connector jack, rear panel)
Wavelength 660 nm
Output level -1 8 dBm

Tape deck section
Recording system
Frequency response

4-track 2-channel stereo
40 -13,000 Hz (t3dB),
using Sony TYPE I
cassettes
- Continued on next page -

Milli Hi-Fi COMPONENT SYSTEM
S ONE;

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HCD-GSX75
Ver1.1 2003.09

Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
Antenna

87.5 - 108.0 MHz
FM lead antenna

Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range 530 - 1,710 kHz
(with the tuning interval

set at 10 kHz)

531 - 1,710 kHz

(with the tuning interval

set at 9 kHz)
Antenna AM loop antenna, external antenna terminal
Intermediate frequency 450 kHz

General
Power requirements: 120 V AC, 60 Hz
Power consumption: 150 W
Dimensions (w/h/d) incl. projecting parts and controls Amplifier/Funer/
Tape/CD section:
Approx. 280 x 326 x 490 mm
Mass: Approx. 11.4 kg
Supplied accessories Remote (1)
size AA (R6) batteries (2)
AM loop antenna (1)
FM lead antenna (1)

Design and specifications are subject to change
without notice

TABLE OF CONTENTS
1_ SERVICING NOTES ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 4 7_ DIAGRAMS
7-1. Circuit Boards Location - -22
2_ GENERAL .......................................................................... 5 7-2. Block Diagrams -
- CD Section - --
3_ DISASSEMBLY ................................................................ 7 * Tuner/Tape DBCk 560mm 4
- INPUT/EVR Section -

3-1. Top Cabinet
3-2. Front Cabi ASSY
3-3. Back Panel ASSY
3-4. Main Board
3-5. Amp Board
3-6. Power Board-
3-7. Holder (LED-S), Middle (R), Power Bracket
3-8. CD Mechanism Deck (CDM64C-K1BD47B) ------------ 11

>8
-8
9

3-9. Base Unit (BU»K1BD47B),

D-Sensor (OUT) Board, T-Sensor Board -------------------- 12
3-10.D-Sensor (IN) Board, Load SW Board,

LT Motor Board

3-11. CD LED Board
3-121BU Holder ASSY
3-13. CD Board, Optical Pick-up (KSM-213BFN) >>>>>>>>>>>>>> 14
3-141 RX-Base PC Board ASSY,

Mechanical Deck (CMAL12234A),

Cassette Holder rrrrrrrrr
3-15. Game Board, H/P Board
3-16. Display Board ............

.. 14
15
15

3-17.KEY (2) Board, CD Sync Button 16
3-18.KEY Board, Wireless Board ........................................ 16
4_ TEST MODE ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 17
5. MECHANICAL ADJUSTMENTS ............................. 18
6. ELECTRICAL ADJUSTMENTS .............................. 18

~Amp Section _

- Display/Power Supply Section -
7-3. Printed Wiring Board - CD Section --
7-4. Schematic Diagram - CD Section -..
7-5. Printed Wiring Board

_ CD Motor/Sensor Section _ ..................................... 30
7-6. Schematic Diagram

- CD Motor/Sensor Section -
7-7. Printed Wiring Board - Main Section -
7-8. Schematic Diagram ~ Main Section (1/3)
7-9. Schematic Diagram - Main Section (2/3)
7-10. Schematic Diagram - Main Section (3/3)
7-11. Printed Wiring Board - Amp Section
7-12. Schematic Diagram ~ Amp Section A
7-13.Printed Wiring Board - Display Section -
7-14. Schematic Diagram - Display Section -
7-15. Printed Wiring Board - Key Section -
7-16. Schematic Diagram ~ Key Section
7-17. Printed Wiring Board - Power Section -
7-18. Schematic Diagram - Power Section
7-19.IC Block Diagrams
7.20, IC Pin Function Description ........................................ 45

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8. EXPLODED VIEWS
3.1, General Section ........................................................... 51
8-2. Front Panel Section
8-3. Chassis Section rrrrr
8-4. Mechanism Deck Section-1 (CDM64C-K1BD47B) 54

8-5. Mechanism Deck Section-2 (CDM64C-K1BD47B .55
8-6. Base Unit Section (BU-K1BD47B) --------------------------- 56
9. ELECTRICAL PARTS |_|ST ....................................... 57