3
TABLE OF CONTENTS
1. SERVICE NOTE
................................................................ 4
2. GENERAL
......................................................................... 29
3. DISASSEMBLY
3-1. Front Panel ......................................................................... 30
3-2. Illumination Assy ................................................................ 31
3-3. CD Mechanism Deck .......................................................... 31
3-4. Base Unit and Magnet Holder ............................................. 32
3-5. CD Mechanism Section ...................................................... 33
4. MECHANICAL ADJUSTMENTS
4-1. Disc Holder a Adjustment/Chucking Pulley
Position Adjustment ............................................................ 34
4-2. Disc Sensor Adjustment ...................................................... 36
5. ELECTRICAL ADJUSTMENTS
5-1. Tools and Measuring Instruments ....................................... 37
5-2. Trouble Shooting ................................................................. 40
6. THEORY OF OPERATION
........................................... 52
7. DIAGRAMS
7-1. Circuit Boards Location ...................................................... 53
7-2. Block Diagrams
• CD-ROM Drive (1/2) Section ........................................... 54
• CD-ROM Drive (2/2) Section ........................................... 55
• Main Section ..................................................................... 56
• Power Supply Section ....................................................... 57
7-3. Printed Wiring Board – CD-ROM Drive Section – ............ 58
7-4. Printed Wiring Board – CD-ROM Drive Section – ............. 59
7-5. Schematic Diagram – CD-ROM Drive (1/6) Section – ...... 60
7-6. Schematic Diagram – CD-ROM Drive (2/6) Section – ...... 61
7-7. Schematic Diagram – CD-ROM Drive (3/6) Section – ...... 62
7-8. Schematic Diagram – CD-ROM Drive (4/6) Section – ...... 63
7-9. Schematic Diagram – CD-ROM Drive (5/6) Section – ...... 64
7-10. Schematic Diagram – CD-ROM Drive (6/6) Section – ..... 65
7-11. Schematic Diagram – Main Section – ............................... 66
7-12. Printed Wiring Board – Main Section – ............................ 67
7-13. Schematic Diagram – Panel Section – .............................. 68
7-14. Printed Wiring Board – Panel Section – ............................ 69
7-15. Schematic Diagram – Sensor Section – ............................ 70
7-16. Printed Wiring Board – Sensor Section – ......................... 71
7-17. Schematic Diagram – SCSI Section – ............................... 72
7-18. Printed Wiring Board – SCSI Section – ............................ 73
7-19. Schematic Diagram – Power Section – ............................. 74
7-20. Printed Wiring Board – Power Section – .......................... 75
7-21. IC Block Diagrams ............................................................ 76
7-22. IC Pin Functions ................................................................ 83
8. EXPLODED VIEWS
8-1. Case Section ........................................................................ 90
8-2. Front Panel Section ............................................................. 91
8-3. Chassis Section ................................................................... 92
8-4. Mechanism Deck Section-1 (CDM-56) .............................. 93
8-5. Mechanism Deck Section-2 (CDM-56) .............................. 94
8-6. Base Unit Section ................................................................ 95
9. ELECTRICAL PARTS LIST
........................................ 96
