3
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 “S curve check” in “CD section adjustment” and check
that the S curve waveform is output several times.
1. SERVICING NOTE
.......................................................... 4
2. GENERAL
.......................................................................... 5
3. DISASSEMBLY
3-1. Loading Panel ...................................................................... 6
3-2. Front Panel ........................................................................... 6
3-3. CD Mechanism .................................................................... 7
3-4. Disc Tray .............................................................................. 7
4. TEST MODE
....................................................................... 8
5. ELECTRICAL ADJUSTMENT
................................. 18
6. DIAGRAMS
6-1. Circuit Boards Location ..................................................... 19
6-2. Block Diagrams ................................................................. 21
• RF/Servo Section ............................................................ 21
• Main Section ................................................................... 22
• Signal Process/Video Section ......................................... 23
• Audio Main Section ........................................................ 24
• I/O, Tuner Section .......................................................... 25
• AMP Section ................................................................... 26
• Display Section ............................................................... 26
• Power Section ................................................................. 27
6-3. Printed Wiring Board – TK Section – ................................ 28
6-4. Schematic Diagram – TK Section – .................................. 29
6-5. Printed Wiring Board – DVD Section – ............................ 30
6-6. Schematic Diagram – DVD (1/12) Section – .................... 32
6-7. Schematic Diagram – DVD (2/12) Section – .................... 33
6-8. Schematic Diagram – DVD (3/12) Section – .................... 34
6-9. Schematic Diagram – DVD (4/12) Section – .................... 35
6-10. Schematic Diagram – DVD (5/12) Section – .................... 36
6-11. Schematic Diagram – DVD (6/12) Section – .................... 37
6-12. Schematic Diagram – DVD (7/12) Section – .................... 38
6-13. Schematic Diagram – DVD (8/12) Section – .................... 39
6-14. Schematic Diagram – DVD (9/12) Section – .................... 40
6-15. Schematic Diagram – DVD (10/12) Section – .................. 41
6-16. Schematic Diagram – DVD (11/12) Section – .................. 42
6-17. Schematic Diagram – DVD (12/12) Section – .................. 43
6-18. Schematic Diagram – FRONT (1/2) Section – ................. 44
6-19. Printed Wiring Board – FRONT (1/2) Section – .............. 45
6-20. Schematic Diagram – FRONT (2/2) Section – ................. 46
6-21. Printed Wiring Board – FRONT (2/2) Section – .............. 47
6-22. Schematic Diagram – VIDEO Section – ........................... 48
6-23. Printed Wiring Board – VIDEO Section – ......................... 49
6-24. Schematic Diagram – AUDIO Section – ........................... 50
6-25. Printed Wiring Board – AUDIO Section – ........................ 51
6-26. Schematic Diagram – PROTECT Section – ...................... 52
6-27. Printed Wiring Board – PROTECT Section – ................... 53
6-28. Printed Wiring Board – POWER (US only) Section – ...... 54
6-29. Printed Wiring Board
– POWER (AEP, UK, SP, HK, E32, AUS only) Section – .. 56
6-30. Schematic Diagram – POWER (1/4) Section – ................. 58
6-31. Schematic Diagram – POWER (2/4) Section – ................. 59
6-32. Schematic Diagram – POWER (3/4) Section – ................. 60
6-33. Schematic Diagram – POWER (4/4) Section – ................. 61
6-34. Schematic Diagram – LOADING Section – ..................... 62
6-35. Printed Wiring Board – LOADING Section – ................... 62
6-36. IC Block Diagrams ............................................................ 63
6-37. IC Pin Functions ................................................................ 67
TABLE OF CONTENTS
7. EXPLODED VIEWS
7-1. Case and Chassis Section ................................................... 71
7-2. Front Panel Section ............................................................ 72
7-3. Mechanism Section ............................................................ 73
8. ELECTRICAL PARTS LIST
.................................
74
