Read Sony HCD-GN70V / MHC-GN70V Service Manual online
HCD-GN70V
3
TABLE OF CONTENTS
1.
SERVICING NOTES
................................................
4
2.
GENERAL
Location of Controls .......................................................
5
3.
DISASSEMBLY
3-1. Case .................................................................................
8
3-2. Loading (Panel) ...............................................................
8
3-3. Front Panel Assy .............................................................
9
3-4. Tuner Pack, Sub Trans Board .........................................
9
3-5. CD 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. Rear Panel ....................................................................... 12
3-10. Main Board ...................................................................... 12
3-11. Power Amp Board ........................................................... 13
3-12. Video board, SW Board, Driver Board .......................... 13
3-13. Base Unit ......................................................................... 14
3-14. Sensor Board ................................................................... 14
3-15. Motor (TB) Board ........................................................... 15
3-16. Motor (LD) Board ........................................................... 15
3-17. BD Board ......................................................................... 16
3-6. Game In Board, Tape Mechanism Deck ......................... 10
3-7. CD Switch Board, Display Board .................................. 11
3-8. Volume Board .................................................................. 11
3-9. Rear Panel ....................................................................... 12
3-10. Main Board ...................................................................... 12
3-11. Power Amp Board ........................................................... 13
3-12. Video board, SW Board, Driver Board .......................... 13
3-13. Base Unit ......................................................................... 14
3-14. Sensor Board ................................................................... 14
3-15. Motor (TB) Board ........................................................... 15
3-16. Motor (LD) Board ........................................................... 15
3-17. BD Board ......................................................................... 16
4.
TEST MODE
.............................................................. 17
5.
MECHANICAL ADJUSTMENTS
....................... 21
6.
ELECTRICAL ADJUSTMENTS
Deck section .................................................................... 21
CD Section ...................................................................... 23
Video Section .................................................................. 24
CD Section ...................................................................... 23
Video Section .................................................................. 24
7.
DIAGRAMS
7-1. Circuit Board Location ................................................... 26
7-2. Block Diagram – CD Servo Section – ........................... 28
7-2. Block Diagram – CD Servo Section – ........................... 28
Block Diagram – Tuner/Tape Deck Section – ............... 29
Block Diagram – Main Section – .................................. 30
Block Diagram – Display/Power Supply Section – ...... 31
Block Diagram – Main Section – .................................. 30
Block Diagram – Display/Power Supply Section – ...... 31
7-3. Printed Wiring Board – BD Board – ............................. 32
7-4. Schematic Diagram – BD Board – ................................ 33
7-5. Printed Wiring Board – Video Board – ......................... 34
7-6. Schematic Diagram – Video Board – ............................ 35
7-7. Printed Wiring Board – CD Mechanism Board – ......... 36
7-8. Schematic Diagram – CD Mechanism Board – ............ 37
7-9. Printed Wiring Boards – Main Board – ......................... 38
7-10. Schematic Diagram – Main Board (1/3) – .................... 39
7-11. Schematic Diagram – Main Board (2/3) – .................... 40
7-12. Schematic Diagram – Main Board (3/3) – .................... 41
7-13. Printed Wiring Boards
7-4. Schematic Diagram – BD Board – ................................ 33
7-5. Printed Wiring Board – Video Board – ......................... 34
7-6. Schematic Diagram – Video Board – ............................ 35
7-7. Printed Wiring Board – CD Mechanism Board – ......... 36
7-8. Schematic Diagram – CD Mechanism Board – ............ 37
7-9. Printed Wiring Boards – Main Board – ......................... 38
7-10. Schematic Diagram – Main Board (1/3) – .................... 39
7-11. Schematic Diagram – Main Board (2/3) – .................... 40
7-12. Schematic Diagram – Main Board (3/3) – .................... 41
7-13. Printed Wiring Boards
– Game In, CD Switch Board – ...................................... 42
7-14. Schematic Diagram
– Game In, CD Switch Board – ...................................... 43
7-15. Printed Wiring Board – Display Board – ...................... 44
7-16. Schematic Diagram – Display Board – ......................... 45
7-17. Printed Wiring Board – Power Amp Board – ................ 46
7-18. Schematic Diagram – Power Amp Board – .................. 47
7-19. Printed Wiring Boards – Trans Board – ........................ 48
7-20. Schematic Diagram – Trans Board – ............................. 49
7-21. IC Block Diagram ........................................................... 50
7-22. IC Pin Function Description ........................................... 52
7-16. Schematic Diagram – Display Board – ......................... 45
7-17. Printed Wiring Board – Power Amp Board – ................ 46
7-18. Schematic Diagram – Power Amp Board – .................. 47
7-19. Printed Wiring Boards – Trans Board – ........................ 48
7-20. Schematic Diagram – Trans Board – ............................. 49
7-21. IC Block Diagram ........................................................... 50
7-22. IC Pin Function Description ........................................... 52
8.
EXPLODED VIEWS
8-1. Case, Rear Panel Section ................................................ 59
8-2. Front Panel Section ......................................................... 60
8-3. Chassis Section ............................................................... 61
8-4. CD Mechanism Deck Section-1
8-2. Front Panel Section ......................................................... 60
8-3. Chassis Section ............................................................... 61
8-4. CD Mechanism Deck Section-1
(CDM74-30BD62) .......................................................... 62
8-5. CD Mechanism Deck Section-2
(CDM74-30BD62) .......................................................... 63
8-6. Base Unit Section (BU-30BD62) ................................... 64
9.
ELECTRICAL PARTS LIST
............................... 65
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