Table Of Contents - Sony MZ-E90 Service Manual

1. SERVICING NOTE
......................................................... 4
2. GENERAL
......................................................................... 5
Playing an MD right away! ................................................... 5
3. DISASSEMBLY
............................................................... 7
3-1. Lid Assy, Upper .................................................................... 7
3-2. Holder Assy ........................................................................... 7
3-3. Mechanism Deck .................................................................. 8
3-4. System Board ........................................................................ 8
3-5. "Plate (L) Assy, Fulcrum", "Plate (R) Assy, Fulcrum" ......... 9
3-6. SW Board, Main Board ........................................................ 9
3-7. Service Assy, OP ................................................................. 10
4. TEST MODE
................................................................... 11
4-1. General ................................................................................ 11
4-2. Setting the TEST MODE .................................................... 11
4-2-1. How to Set the TEST MODE ...................................... 11
4-2-2. Operations when the TEST MODE is set ................... 11
4-2-3. How to release the TEST MODE ................................ 11
4-3. Test Mode Structure ............................................................ 11
4-4. Manual Mode ...................................................................... 12
4-4-1. Outline of the function ................................................ 12
4-4-2. How to set the Manual Mode ...................................... 12
4-5. Overall Adjustment Mode ................................................... 12
4-5-1. Outline of the Function ............................................... 12
4-6. Self-diagnostic Display Mode ............................................ 12
4-6-1. Outline of the Function ............................................... 12
4-6-2. Self diagnostic Mode ................................................... 13
4-6-3. Clearing the Error Display Code ................................. 13
4-7. Key Check Mode ................................................................ 14
4-7-1. Outline of the Function ............................................... 14
4-7-2. Setting the Key Check Mode ....................................... 14
5. ELECTRICAL ADJUSTMENTS
5-1. General ................................................................................ 15
5-2. Notes for Adjustment .......................................................... 15
5-2-1. Jigs ............................................................................... 15
5-2-2. Adjustment sequence ................................................... 15
5-2-3. Power ........................................................................... 15
5-3. Reset NV ............................................................................. 15
5-3-1. How to Reset NV ........................................................ 15
5-4. Manual Power Adjustments ................................................ 15
5-4-1. Adjustment sequence ................................................... 15
5-4-2. Vc PWM Duty (L) Adjustment Method ...................... 15
5-4-3. Vrem PWM Duty (L) Adjustment Method .................. 15
5-4-4. Vc PWM Duty (H) Adjustment Method ..................... 16
5-4-5. Vrem PWM Duty (H) Adjustment Method ................. 16
5-5. Overall Adjustment Mode ................................................... 16
5-5-1. Overall Adjustment Mode Structure ............................ 16
5-5-2. Overall CD and MO adjustment Method .................... 16
5-5-3. Overall CD and MO adjustment Items ........................ 17

TABLE OF CONTENTS

6. DIAGRAMS
6-1. IC Pin Descriptions ............................................................. 18
6-2. Block Diagrams .................................................................. 21
6-3. Printed Wiring Boards and Schematic Diagrams ................ 27
6-4. IC Block Diagrams ............................................................. 46
7. EXPLODED VIEWS
7-1. Main Unit Section ............................................................... 49
7-2. Mechanism Deck Section ................................................... 50
8. ELECTRICAL PARTS LIST
.............................. 15
- 3 -
..................................................................... 18
6-1-1. IC801 CXR701080-006GA (System Control) ............ 18
6-2-1. MD Block Diagram ..................................................... 21
6-2-2. Servo Block Diagram .................................................. 23
6-2-3. System Control Block Diagram .................................. 25
6-3-1. Printed Wiring Board - Main Board - ........................ 27
6-3-2. Schematic Diagram - Main Board (1/4) ..................... 31
6-3-3. Schematic Diagram - Main Board (2/4) - .................. 33
6-3-4. Schematic Diagram - Main Board (3/4) - .................. 35
6-3-5. Schematic Diagram - Main Board (4/4) - .................. 37
6-3-6. Printed Wiring Board - System Board - ..................... 39
6-3-7. Schematic Diagram - System Board - ........................ 41
6-3-8. Printed Wiring Board - SW Board - ........................... 43
6-3-9. Schematic Diagram - SW Board - .............................. 45
..................................................... 49
...................................... 51