3
1. SERVICING NOTE......................................................... 4
2. GENERAL
Looking at the Controls (MZ-G750)................................... 5
Looking at the Controls (MZ-R700)................................... 6
3. DISASSEMBLY
3-1. Panel Assy, Lower...............................................................7
3-2. Panel Assy, Upper............................................................... 7
3-3. LCD Module....................................................................... 8
3-4. Main Board .........................................................................8
3-5. MD Mechanism Deck......................................................... 9
3-6. Service Assy, OP.................................................................9
3-7. Holder Assy.......................................................................10
3-8. Motor Flexible Board........................................................ 10
3-9. Motor, DC (M602)............................................................ 11
3-10. “Motor, DC (M601)”, “Motor, DC (M603)”.................... 11
4. TEST MODE
4-1. Outline............................................................................... 12
4-2. Setting Method of Test Mode............................................ 12
4-3. Operation in Setting the Test Mode...................................12
4-4. Releasing the Test Mode................................................... 12
4-5. Configuration of Test Mode.............................................. 13
4-6. Manual Mode ....................................................................13
4-7. Overall Adjustment Mode................................................. 14
4-8. Self-Diagnosis Result Display Mode................................ 14
4-9. Result the Error Display Code ..........................................15
4-10. Sound Skip Check Result Display Mode.......................... 16
4-11. Key Check Mode............................................................... 16
TABLE OF CONTENTS5. ELECTRICAL ADJUSTMENTS
5-1. Outline............................................................................... 18
5-2. Precautions for Adjustment............................................... 18
5-3. Adjustment Sequence........................................................ 18
5-4. NV Reset........................................................................... 18
5-5. Power Supply Manual Adjustment....................................19
5-6. Temperature Correction.....................................................20
5-7. Laser Power Check ...........................................................20
5-8. Overall Adjustment Mode................................................. 21
5-9. Resume Clear ....................................................................23
5-10. Patch Data Rewriting when Nonvolatile
Memory was Replaced...................................................... 23
6. DIAGRAMS
6-1. IC Pin Function Description ............................................29
6-2. Block Diagram – Servo Section –..................................... 35
6-3. Block Diagram – Audio Section – ....................................36
6-4. Block Diagram – System Control/Power Section –.......... 37
6-5. Printed Wiring Board – Main Section –............................ 38
6-6. Schematic Diagram – Main Section (1/3) –...................... 41
6-7. Schematic Diagram – Main Section (2/3) –...................... 42
6-8. Schematic Diagram – Main Section (3/3) –...................... 43
7. EXPLODED VIEWS
7-1. Panel Section..................................................................... 47
7-2. Chassis Section .................................................................48
7-3. MD Mechanism Deck Section.......................................... 49
8. ELECTRICAL PARTS LIST......................................50
MZ-G750/R700