Sony MDS-JE640 - page 43

MDS-JE640

6-11. PRINTED WIRING BOARD – POWER SECTION –

Contents

Main MDS-JE640 SPECIFICATIONS SERVICE MANUAL MINIDISC DECK Canadian Model AEP Model UK Model E Model SELF-DIAGNOSIS FUNCTION Self-diagnosis function ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS 4. TEST MODE 5. ELECTRICAL ADJUSTMENTS 6. DIAGRAMS 8. ELECTRICAL P ARTS LIST 7. EXPLODED VIEWS SECTION 1 SERVICE NOTES JIG FOR CHECKING BD BOARD WAVEFORM Page CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS FORCED RESET Fig. 2 Reading the Test Mode Display (During playback) RETRY CAUSE DISPLAY MODE Fig. 1 Reading the Test Mode Display (During recording and stop) Hexadecimal Binary Conversion Table SECTION 2 GENERAL SECTION 3 DISASSEMBLY 3-1. UPPER CASE (408226) 3-2. FRONT PANEL SECTION Note : Follow the disassembly procedure in the numerical order given. 3-3. MAIN BOARD 3-4. PT BOARD, VOL-SEL BOARD 3-5. MECHANISM DECK SECTION (MDM-7A) 3-6. BD BOARD SECTION 4 TEST MODE 4-1. PRECAUTIONS FOR USE OF TEST MODE 4-2. SETTING THE TEST MODE 4-3. EXITING THE TEST MODE 4-4. BASIC OPERATIONS OF THE TEST MODE 4-5. SELECTING THE TEST MODE Page 4-6. FUNCTIONS OF OTHER BUTTONS 4-7. TEST MODE DISPLAYS 4-8. MEANINGS OF OTHER DISPLAYS 4-9. AUTOMATIC SELF-DIAGNOSIS FUNCTION 4-10. INFORMATION 4-11. WHEN MEMORY NG IS DISPLAYED SECTION 5 ELECTRICAL ADJUSTMENTS 5-1. PARTS REPLACEMENT AND ADJUSTMENT Adjustment flow 5-2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSION 5-3. PRECAUTIONS FOR USE OF OPTICAL PICK- UP (KMS-260B) Optical pick-up flexible board 5-4. PRECAUTIONS FOR ADJUSTMENTS 5-6. CHECKS PRIOR TO REPAIRS 5-5. USING THE CONTINUOUSLY RECORDED DISC Page Page 5-7. INITIAL SETTING OF ADJUSTMENT VALUE 5-8. RECORDING AND DISPLAYING THE Iop INFORMATION 5-9. TEMPERATURE COMPENSATION OFFSET ADJUTMENT 5-10. LASER POWER ADJUSTMENT 5-12. TRAVERSE ADJUSTMENT 5-13. FOCUS BIAS ADJUSTMENT 5-14. ERROR RATE CHECK 5-15. FOCUS BIAS CHECK 5-16. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT 5-17. ADJUSTING POINTS AND CONNECTING POINTS SECTION 6 DIAGRAMS 6-1. CIRCUIT BOARDS LOCATION PT board VOL-SEL board HP board KB board 6-2. BLOCK DIAGRAMS BD SECTION MORFO M B D MAIN SECTION A B D C SIGNAL PATH : PLAY (ANALOG OUT) : REC (ANALOG IN) 1 2 (Play mode) 3 (Play mode) 4 5 6 7 8 6-3. PRINTED WIRING BOARD BD SECTION Location Page Page 6-6. PRINTED WIRING BOARD MAIN SECTION (SIDE A) 6-7. PRINTED WIRING BOARD MAIN SECTION (SIDE B) Page Page Page Page Page Page 6-14. IC BLOCK DIAGRAMS IC101 CXA2523AR (BD BOARD) IC141 BH6511FS (BD BOARD) AMP PSB IC400 LA5643 (MAIN BOARD) 59 IC480 M5293L (MAIN BOARD) IC500 AK4524-TP (MAIN BOARD) 12 1110 13 123 48 76 6-15. IC PIN FUNCTIONS Page Page Page IC1 M30805SGP SYSTEM CONTROL (MAIN BOARD) Page 7-1. CHASSIS SECTION SECTION 7 EXPLODED VIEWS 7-2. FRONT PANEL SECTION Page 7-4. MECHANISM SECTION-2 (MDM-7A) SECTION 8 ELECTRICAL PARTS LIST BD BD DISPLAY HP KEY-SWKB Page Page PT VOL-SEL