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TABLE OF CONTENTS

HCD-GTX88

1. GENERAL

Guide to parts and controls ...................................................... 6

2. DISASSEMBLY

2-1. Case (Top) ......................................................................... 13
2-2. Loading Panel .................................................................... 13
2-3. Tuner Pack ......................................................................... 14
2-4. CD Block Section .............................................................. 14
2-5. Front Panel Section ........................................................... 15
2-6. Tape Mechanism Deck, Mic Board,
USB Connector Board ....................................................... 15
2-7. Panel Board, Function Board, Jog Board .......................... 16
2-8. CD-SW Board ................................................................... 16
2-9. Cover (CDM) .................................................................... 17
2-10. Back Panel Section ............................................................ 17
2-11. Power Board Section ......................................................... 18
2-12. Main Board ....................................................................... 18
2-13. Subwoofer Board, Power Board ........................................ 19
2-14. Power Transformer (T1200) .............................................. 19
2-15. BD91 Board ...................................................................... 20
2-16. Driver Board, SW Board, USB Board .............................. 20
2-17. Optical Pick-up ................................................................. 21
2-18. Sensor Board ..................................................................... 21
2-19. Motor (TB) Board ............................................................. 22
2-20. Motor (LD) Board ............................................................. 22

3. TEST MODE

..................................................................... 23

4. MECHANICAL ADJUSTMENTS

............................... 27

5. ELECTRICAL ADJUSTMENTS

................................. 28

6. DIAGRAMS

6-1. Block Diagram — RF/Servo Section — ........................... 31
6-2. Block Diagram — Tape/Tuner Section — ........................ 32
6-3. Block Diagram — Main Section — .................................. 33
6-4. Block Diagram — USB Section — .................................. 34
6-5. Block Diagram — AMP/Subwoofer Section — ............... 35
6-6. Block Diagram — Display/Power Section — .................. 36

6-7. Circuit Boards Location .................................................... 37
6-8. Printed Wiring Board — BD91 Section — ....................... 40
6-9. Schematic Diagram — BD91 Section — .......................... 41
6-10. Printed Wiring Boards — Driver Section — ..................... 42
6-11. Schematic Diagram — Driver Section — ......................... 43
6-12. Schematic Diagram — Main Section (1/4) — .................. 44
6-13. Schematic Diagram — Main Section (2/4) — .................. 45
6-14. Schematic Diagram — Main Section (3/4) — .................. 46
6-15. Schematic Diagram — Main Section (4/4) — .................. 47
6-16. Printed Wiring Board — Main Section — ........................ 48
6-17. Printed Wiring Board — USB Connector Section — ....... 49
6-18. Schematic Diagram — USB Connector Section — .......... 49
6-19. Printed Wiring Board — USB Section — ......................... 50
6-20. Schematic Diagram — USB Section — ........................... 51
6-21. Printed Wiring Board — Effector Section — ................... 52
6-22. Schematic Diagram — Effector Section — ...................... 53
6-23. Printed Wiring Board — Panel Section — ........................ 54
6-24. Schematic Diagram — Panel Section — .......................... 55
6-25. Printed Wiring Boards — Function Section — ................. 56
6-26. Schematic Diagram — Function Section — ..................... 57
6-27. Printed Wiring Board — Power Amp Section — ............. 58
6-28. Schematic Diagram — Power Amp Section — ................ 59
6-29. Printed Wiring Board — Subwoofer Section — ............... 60
6-30. Schematic Diagram — Subwoofer Section — .................. 61
6-31. Printed Wiring Boards — Trans Section — ...................... 62
6-32. Schematic Diagram — Trans Section — .......................... 63

7. EXPLODED VIEWS

7-1. Main Section ..................................................................... 78
7-2. Front Panel Section (1) ...................................................... 79
7-3. Front Panel Section (2) ...................................................... 80
7-4. Front Panel Section (3) ...................................................... 81
7-5. Chassis Section ................................................................. 82
7-6. CD Mechanism Section (1) ............................................... 83
7-7. CD Mechanism Section (2) ............................................... 84

8. ELECTRICAL PARTS LIST

........................................ 85