Sony HCD-VX888 is the tuner, deck, Video CD and amplifier section in MHC-VX888
Service Manual and Circuit Diagram
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Sony HCD-VX888 is the tuner, deck, Video CD  and amplifier section in MHC-VX888 <br>Service Manual and Circuit Diagram  <br> <font color=red>New!</font>
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This Sony HCD-VX888 is the tuner, deck, Video CD and amplifier section in MHC-VX888 Service Manual and Circuit Diagram
. This service information is designed for experienced repair technicians only and not designed for use by the general public.


TABLE OF CONTENTS

1. GENERAL ................................................................... 4

2. DISASSEMBLY

2-1. Disassembly Flow ........................................................... 7
2-2. Case (Top) ....................................................................... 8
2-3. Loading Panel .................................................................. 8
2-4. CD Mechanism Deck (CDM58E-30BD61A) ................ 9
2-5. Front Panel Section ......................................................... 9
2-6. Tape Mechanism Deck (TCM-230AWR41)................... 10
2-7. Back Panel Section .......................................................... 10
2-8. Main Board ...................................................................... 11
2-9. LEAF SW Board, HEAD (A) Board, HEAD (B) Board ............................................................ 11
2-10. Base Unit (BU-30BD61A).............................................. 12
2-11. VIDEO Board, DRIVER Board ..................................... 12
2-12. MOTOR Board, ADDRESS SENSOR Board ................ 13

3. TEST MODE ............................................................... 14

4. MECHANICAL ADJUSTMENTS ........................ 17

5. ELECTRICAL ADJUSTMENTS .......................... 17

6. DIAGRAMS

6-1. Block Diagram – TUNER/CD Section –....................... 23
6-2. Block Diagram – MAIN Section – ................................ 24
6-3. Block Diagram – DISPLAY/POWER Section – ........... 25
6-4. Block Diagram – VIDEO CD Section – ........................ 26
6-5. Note for Printed Wiring Boards and Schematic Diagrams ....................................................... 27
6-6. Schematic Diagram – BD Board – ................................ 28
6-7. Printed Wiring Board – BD Board – ............................. 29
6-8. Schematic Diagram – MAIN Board (1/4) – .................. 30
6-9. Schematic Diagram – MAIN Board (2/4) – .................. 31
6-10. Schematic Diagram – MAIN (3/4)/HEAD Board – ...... 32
6-11. Schematic Diagram – MAIN Board (4/4) – .................. 33
6-12. Printed Wiring Board – MAIN Board – ........................ 34
6-13. Schematic Diagram – VIDEO SWITCH Board – ......... 35
6-14. Printed Wiring Boards – HEAD (A)/(B) Board – ......... 35
6-15. Printed Wiring Board – VIDEO SWITCH Board – ...... 35
6-16. Schematic Diagram – POWER AMP/SENSOR Board – ................................ 36
6-17. Printed Wiring Boards – POWER AMP/SENSOR Board – ................................ 37
6-18. Schematic Diagram – PANEL Board –.......................... 38
6-19. Printed Wiring Board – PANEL Board – ....................... 39
6-20. Schematic Diagram – CD SWITCH/PAD SWITCH Board – ........................ 40
6-21. Printed Wiring Boards – CD SWITCH/PAD SWITCH Board – ........................ 41
6-22. Schematic Diagram – LEAF SW Board – ..................... 42
6-23. Printed Wiring Board – LEAF SW Board – .................. 42
6-24. Schematic Diagram – ADDRESS SENSOR/DRIVER/MOTOR Board –...... 43
6-25. Printed Wiring Boards – ADDRESS SENSOR/DRIVER/MOTOR Board –...... 43
6-26. Schematic Diagram – VIDEO Board (1/3) – ................ 44
6-27. Schematic Diagram – VIDEO Board (2/3) – ................ 45
6-28. Schematic Diagram – VIDEO Board (3/3) – ................ 46
6-29. Printed Wiring Board – VIDEO Board – ....................... 47
6-30. Schematic Diagram – MAIN TRANS/SUB TRANS Board – ....................... 48
6-31. Printed Wiring Boards – MAIN TRANS/SUB TRANS Board – ........................ 49
6-32. IC Pin Function Description ........................................... 55

7. EXPLODED VIEWS

7-1. Cabinet Section ............................................................... 60
7-2. Front Panel Section ......................................................... 61
7-3. Main Board Section ........................................................ 62
7-4. CD Mechanism Deck Section (CDM58E-30BD61A) ... 63
7-5. Base Unit Section (BU-30BD61A) ................................ 64
7-6. Tape Mechanism Deck Section-1 (TCM-230AWR41) .... 65
7-7. Tape Mechanism Deck Section-2 (TCM-230AWR41) .... 66

8. ELECTRICAL PARTS LIST .................................. 67

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Service Manual and Circuit Diagram
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