Sony MZ-R90/R91 User Manual

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......................................................................... 5

Looking at the Controls ........................................................ 5
Recording an MD Right Away! ............................................ 6
Playing an MD Right Away! ................................................. 7

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3-1. Block Assy, Bottom .............................................................. 8
3-2. Panel Block Assy, Upper ....................................................... 8
3-3. LCD Module ......................................................................... 9
3-4. Main Board ........................................................................... 9
3-5. MD Mechanism Deck ......................................................... 10
3-6. Service Assy, OP ................................................................. 10
3-7. Holder Assy ......................................................................... 11
3-8. Motor Flexible Board .......................................................... 11
3-9. Motor, DC (M602) .............................................................. 12
3-10. “Motor, DC (M601)”, “Motor, DC (M603)” .................... 12

................................................................... 13

4-1. Outline ................................................................................. 13
4-2. Test Mode ............................................................................ 13
4-3. Manual Mode ...................................................................... 14
4-4. Overall Adjustment Mode ................................................... 15
4-5. Sound Skip Check Result Display Mode ............................ 16
4-6. Self-diagnosis Display Mode .............................................. 17
4-7. Key Check Mode ................................................................. 19

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5-1. Outline ................................................................................. 20
5-2. Precautions for Adjustment ................................................. 20
5-3. Adjustment Sequence .......................................................... 20
5-4. NV Reset ............................................................................. 20
5-5. Power Supply Manual Adjustment ...................................... 20
5-6. Temperature Correction ....................................................... 22
5-7. Overall Adjustment Mode ................................................... 22
5-8. Laser Power Check ............................................................. 23

..................................................................... 25

6-1. Block Diagram – MD Section – .......................................... 25
6-2. Block Diagram – Audio Section – ...................................... 27
6-3. Block Diagram – Power Supply Section – .......................... 29
6-4. Printed Wiring Board – Main Board – ................................ 31
6-5. Schematic Diagram – Main Board (1/3) – .......................... 35
6-6. Schematic Diagram – Main Board (2/3) – .......................... 37
6-7. Schematic Diagram – Main Board (3/3) – .......................... 39
6-8. IC Block Diagrams .............................................................. 41
6-9. IC Pin Descriptions ............................................................. 44

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7-1. Cabinet Section ................................................................... 51
7-2. Mechanism Deck Section ................................................... 52

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