TABLE OF CONTENTS
1. SERVICING NOTE..........................................................7-12.Schematic Diagram � Main (1/5) Section �4..................... 53
7-13. Schematic Diagram � Main (2/5) Section � ..................... 55
7-14. Schematic Diagram � Main (3/5) Section � ..................... 57
2. GENERAL ....................................................................6
7-15. Schematic Diagram � Main (4/5) Section � ..................... 59
7-16. Schematic Diagram � Main (5/5) Section � ..................... 61
3. DISASSEMBLY
7-17. Printed Wiring Board � Power Section � ......................... 63
3-1. Front Panel ............................................................................ 8
7-18. Schematic Diagram � Power (1/2) Section � ................... 65
3-2. Main Board ........................................................................... 8
7-19. Schematic Diagram � Power (2/2) Section � ................... 67
3-3. Sub Panel .............................................................................. 9
7-20. Schematic Diagram � Leaf SW Section � ........................ 69
3-4. CD-L/CD-R Board and CD Lid Assembly ........................... 9
7-21. Printed Wiring Board � Leaf SW Section � ..................... 69
3-5. Tape Mechanism Deck and Cassette Lid ............................ 10
7-22. Schematic Diagram � Panel FL Section � ........................ 71
3-6. CD Mechanism Deck .......................................................... 10
7-23. Printed Wiring Board � Panel FL Section � ..................... 73
3-7. Base Unit............................................................................. 10
7-24. Schematic Diagram � Panel VR Section � ....................... 75
3-8. Disc Table ........................................................................... 11
7-25. Printed Wiring Board � Panel VR Section � .................... 77
7-26. Schematic Diagram � TC Panel Section � ....................... 79
4. TEST MODE.....................................................................12
7-27. Printed Wiring Board � TC Panel Section �..................... 81
7-28. Schematic Diagram � CD Panel Section � ....................... 83
5. MECHANICAL ADJUSTMENTS ..........................137-29. Printed Wiring Board � CD Panel Section � .................... 85
7-30. Schematic Diagram � CD Motor Section � ...................... 87
6. ELECTRICAL ADJUSTMENTS...............................7-31.Printed 13Wiring Board � CD Motor Section �...................89
7-32. Schematic Diagram � Jack Section � ............................... 91
7. DIAGRAMS7-33. Printed Wiring Board � Jack Section � ............................ 93
7-1. Circuit Boards Location ......................................................7-34. Schematic Diagram � Trans Section �18............................. 95
7-2. Block Diagrams7-35. Printed Wiring Board � Trans Section �........................... 97
Y BD Section .......................................................................7-36. IC Block Diagrams ...........................................................1998
Y Deck Section ....................................................................7-37. IC Pin Functions .............................................................21101
Y Main (1/2) Section ........................................................... 23
Y Main (2/2) Section ...........................................................8. EXPLODED VIEWS25
Y Video Section ...................................................................8-1. Case and Back Panel Section ............................................27111
Y Power Section ..................................................................8-2. Front Panel Section 1 ........................................................29112
Y Display Section ................................................................8-3. Front Panel Section 2 ........................................................31113
7-3. Printed Wiring Board � BD Section �.................................8-4. Chassis Section .................................................................35114
7-4. Schematic Diagram � BD Section � ...................................8-5. TC Mechanism Section 1 (TCM230A37WR2/230PWR2)... 115
7-5. Schematic Diagram � Deck Section � ................................8-6. TC Mechanism Section 2 (TCM230A39WR2/230PWR2)... 116
7-6. Printed Wiring Board � Deck Section � ..............................8-7. CD Mechanism Section (CDM37L-5BD34L)41.................. 117
7-7. Printed Wiring Board � Video Section � .............................8-8. Base Unit Section (BU-5BD34L)43..................................... 118
7-8. Schematic Diagram � Video (1/3) Section � ....................... 45
7-9. Schematic Diagram � Video (2/3) Section � .......................9. ELECTRICAL PARTS LIST47.................................. 119
7-10. Schematic Diagram � Video (3/3) Section � .................... 49
7-11. Printed Wiring Board � Main Section � ........................... 51
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-
up block. Therefore, when checking the laser diode emission, ob-
serve from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
Carry out the OS curve check� in OCD section adjustment� and check
that the S curve waveform is output four times.
� 3 � |
ACEC
