Sony MZ-E30 User manual

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NEWTECHNICALTHEORY
FOR SERVICING
MZ-E30
OPERATION MANUAL
PORTABLE MINI DISC PLAYER

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TABLE OF CONTENTS
Section Title Page
1. DIAGRAMS
1-1. BLOCK DIAGRAM ........................................................................................................................................ 3
2. FUNCTIONS AND FEATURES
2-1. Principal Features ............................................................................................................................................. 6
3. Difference in System Configurations by Generation
3-1. System Block Diagrams................................................................................................................................... 8
4. OUTLINE OF SYSTEM
4-1. Microprocessor Interface ................................................................................................................................. 11
4-2. Clock System.................................................................................................................................................... 14
5. POWER SUPPLY CIRCUIT
5-1. Outline of Power supply Circuit Operation .................................................................................................... 16
5-2. Operation in Wakeup (Startup) Mode ............................................................................................................. 20
5-3. Operation in the Sleep (Pause) Mode.............................................................................................................. 24
5-4. Detecting Decrease in Voltage ........................................................................................................................ 24
5-5. RESET Circuit.................................................................................................................................................. 26
6. SYSTEM CONTROL
6-1. Detection Switch .................................................................................................................................................. 27
6-2. Key Input Detection of Control Buttons ......................................................................................................... 28
6-3. Control of APC Circuit and Laser Power ....................................................................................................... 30
7. Playback Circuit
7-1. Outline of Playback Circuit ............................................................................................................................. 32
7-2. Playback Operations......................................................................................................................................... 32
7-3. Digital DBB and Mute Circuit ........................................................................................................................ 33
8. Servo Circuit
8-1. Outline of Servo Circuit................................................................................................................................... 39
8-2. Intermittent Operations of Servo ..................................................................................................................... 40
8-3. Focus Search and Disc Discrimination ........................................................................................................... 40
8-4. Focus Servo Circuit.......................................................................................................................................... 42
8-5. Tracking Servo Circuit..................................................................................................................................... 46
8-6. Sled Servo Circuit ............................................................................................................................................ 46
8-7. Spindle Servo Circuit ....................................................................................................................................... 50
9. Operations of Mechanism ............................................................................................ 53
10. Appendix (Semiconductor Specifications)
10-1. RF AMP SN761050A ...................................................................................................................................... 54
10-2. DSP/Digital Servo µPD63730GC.................................................................................................................... 58
10-3. Servo Driver MPC17A55FTA......................................................................................................................... 63
10-4. DC-DC Converter MPC1830VMEL ............................................................................................................... 71