HCD-GSX75, MHC-GSX75 - Sony Audio Service Manual (repair manual). Page 2

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

87.5 – 108.0 MHz

Antenna

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/Tuner/

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.

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3-1. Top Cabinet ··································································· 8
3-2. Front Cabi ASSY ··························································· 8
3-3. Back Panel ASSY ·························································· 9
3-4. Main Board ···································································· 9
3-5. Amp Board ·································································· 10
3-6. Power Board ································································ 10
3-7. Holder (LED-S), Middle (R), Power Bracket ············· 11
3-8. CD Mechanism Deck (CDM64C-K1BD47B) ············ 11
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 ··························································· 12

3-11. CD LED Board ···························································· 13
3-12. BU Holder ASSY ························································ 13
3-13. CD Board, Optical Pick-up (KSM-213BFN) ·············· 14
3-14. RX-Base PC Board ASSY,

Mechanical Deck (CMAL1Z234A),
Cassette Holder ··························································· 14

3-15. Game Board, H/P Board ·············································· 15
3-16. Display Board ······························································ 15
3-17. KEY (2) Board, CD Sync Button ································ 16
3-18. KEY Board, Wireless Board ········································ 16

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7-1. Circuit Boards Location ·············································· 22
7-2. Block Diagrams ··························································· 23

– CD Section – ···························································· 23
– Tuner/Tape Deck Section – ······································ 24
– INPUT/EVR Section – ············································· 25
– Amp Section – ·························································· 26
– Display/Power Supply Section – ······························ 27

7-3. Printed Wiring Board  – CD Section – ························ 28
7-4. Schematic Diagram  – CD Section – ··························· 29
7-5. Printed Wiring Board

– CD Motor/Sensor Section – ····································· 30

7-6. Schematic Diagram

– CD Motor/Sensor Section – ····································· 31

7-7. Printed Wiring Board  – Main Section – ····················· 32
7-8. Schematic Diagram  – Main Section (1/3) – ··············· 33
7-9. Schematic Diagram  – Main Section (2/3) – ··············· 34
7-10. Schematic Diagram  – Main Section (3/3) – ··············· 35
7-11. Printed Wiring Board  – Amp Section – ······················ 36
7-12. Schematic Diagram  – Amp Section – ························· 37
7-13. Printed Wiring Board  – Display Section – ················· 38
7-14. Schematic Diagram  – Display Section – ···················· 39
7-15. Printed Wiring Board  – Key Section – ······················· 40
7-16. Schematic Diagram  – Key Section – ·························· 41
7-17. Printed Wiring Board  – Power Section – ··················· 42
7-18. Schematic Diagram  – Power Section – ······················ 43
7-19. IC Block Diagrams ······················································ 44
7-20. IC Pin Function Description ········································ 46

8-1. General Section ··························································· 51
8-2. Front Panel Section ····················································· 52
8-3. Chassis Section ···························································· 53
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

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