Sony HCD-MD373 service manual

Contents

Main HCD-MD373 SERVICE MANUAL COMPACT DISC DECK RECEIVER SELF-DIAGNOSIS FUNCTION ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS Page 1. SERVICING NOTE 2. GENERAL 3. DISASSEMBLY 4. TEST MODE 5. ELECTRICAL ADJUSTMENTS 6. DIAGRAMS TABLE OF CONTENTS 7. EXPLODED VIEWS 8. ELECTRICAL PARTS LIST SECTION 1 SERVICING NOTE Tray (CDM) CLEANING THE OPTICAL PICKUP (CD PLAYER) Optical pick-up block Move the Cam block in the direction of arrow with a finger. Page Page Page Page JIG FOR CHECKING BD (MD) BOARD WAVEFORM Page CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS FORCED RESET RETRY CAUSE DISPLAY MODE Fig. 1 Reading the Test Mode Display (During recording and stop) Fig. 2 Reading the Test Mode Display (During playback) Hexadecimal Binary Conversion Table LOCATION OF PARTS AND CONTROLS SECTION 2 GENERAL Page Page SECTION 3 DISASSEMBLY 3-1. CASE 3-3. BACK PANEL 3-2. FRONT PANEL 3-4. MAIN BOARD AND POWER TRANSFORMER 3-5. CD MECHANISM DECK 3-6. TRAY, GEAR AND CAM 3-7. CD BASE UNIT 3-8. OPTICAL PICK-UP SECTION OF CD (KSS-213BA/F-NP) 3-9. BD (CD) BOARD, SPINDLE MOTOR (M101) AND SLED MOTOR (M102) 3-10. MD MECHANISM DECK 3-12. BASE UNIT (MBU-5A) AND BD (MD) BOARD 3-11. SLIDER (CAM) - 3-13. OVER WRITE HEAD 3-14. OPTICAL PICK-UP OF MD (KMS-260B/J1N) 3-15. SPINDLE MOTOR (M901) AND SLED MOTOR (M902) (MD) Note: Turn the optical pick-up inside out, and pull out the flexible 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 D: Develop Group (*) C: Check S: Service A: Adjust Page 4-6. FUNCTIONS OF OTHER BUTTONS 4-7. TEST MODE DISPLAYS MEANINGS OF OTHER DISPLAYS * Items shown correspond to the indicated button indicators. MD SECTION 5-1. PARTS REPLACEMENT AND ADJUSTMENT Check and adjust the MDM and MBU as follows. The procedure changes according to the part replaced SECTION 5 ELECTRICAL ADJUSTMENTS Abbreviation OP : Optical pick-up OWH: Overwrite head 5-2. PRECAUTIONS FOR CHECKING LASER DIODE EMISSINON 5-3.PRECAUTIONS FOR USE OF OPTICAL PICK- UP (KMS-260B) Optical pick-up flexible board 5-4. PRECAUTIONS FOR ADJUSTMENTS 5-5. CREATING CONTINUOUSLY RECORDED DISC 5-6. CHECKS PRIOR TO REPAIRS 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 5-11. TRAVERSE ADJUSTMENT 5-12. FOCUS BIAS ADJUSTMENT 5-13. ERROR RATE CHECK 5-14. FOCUS BIAS CHECK 5-15. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT 5-15. ADJUSTING POINTS AND CONNECTING POINTS CD SECTION Page 6-2. BLOCK DIAGRAMS BD (CD) SECTION M SIGNAL PATH : CD : CD (Digital out) C (Page 44) BD (MD) SECTION (1/2) A (Page 43) TX FILTER WBLADJ A MAIN SECTION CLK : CD (Digital out) DATA (Page 41) (Page 43) (Page 41) : FM : CD SIGNAL PATH : PB (TAPE) : REC (TAPE) : PB (MD) : REC (MD) : PB (Digital out) : REC (Digital in) Indication of transistor 2 3 4 WAVEFORMS BD ( CD) SECTION 5 2 BD (MD) (2/2) SECTION (Page 52) (Page 55) 6-5.PRINTED WIRING BOARD BD (MD) SECTION (Page 57) (Page 57) Semiconductor Location Page B C Page 6-10. PRINTED WIRING BOARD MAIN SECTION (Page 61) (Page 64) (Page 63) (Page 57) (Page 46) (Page 51) Page Page Page Page Page Page Page Page 6-19. PRINTED WIRING BOARD PANEL SECTION (Page 52) Page 6-21. PRINTED WIRING BOARD POWER SECTION (Page 59) (Page 52) VOLTAGE SELECTOR J H (Page 56) (Page 55) (Page 52) (Page 57) 6-26. IC BLOCK DIAGRAMS BD (MD) Board (1/2) IC101 CXA2523AR IC152 BH6511FS-E2 BD (MD) Board (2/2) IC121 CXD2654R BD (CD) Board IC101 CXD2587Q TE RFDC VCC OUT2 GND OUT1 VS 10 9 8 7 6 2 3 45 MAIN Board (3/3) IC171 LB1641 IC302 MC14052B MAIN Board (1/3) IC301 M62428AFP MAIN Board (2/3) IC931 M62016L 6-27. IC PIN FUNCTIONS Page Page Page Page Page Page Page SECTION 7 EXPLODED VIEWS 7-1. CASE AND FRONT PANEL SECTION Page Page Page 7-5. CD MECHANISM DECK (CDM55A-5SBD32) 7-6. CD BASE UNIT (BU-5SBD32) (BU identification: black plastic turntable with magnet) 7-7. CD MECHANISM DECK (CDM55C-5BD32) 7-8. CD BASE UNIT (BU-5BD32) (BU identification: metal turntable without magnet) 355 356 #9 353 SECTION 8 ELECTRICAL PARTS LIST AMP AMP BD (CD) BD (MD)BD (CD) MD DIGITAL BD (MD) LOADING MAIN MD DIGITAL Page Page Page PANEL PANEL POWER POWER SP SW HCD-MD373