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DVD-VCR DVP721VR
DVP721VR/00/02/05/14
Service
Service
Service
Service Manual
SECTION 1 SUMMARY 1-1 PRINTED CIRCUIT DIAGRAMS 3-50
PRODUCT SAFETY SERVICING GUIDELINES FOR 1. MAIN P.C.BOARD (VCR+DVD)_SOLDER SIDE 3-50
VIDEO PRODUCTS 1-2 2. MAIN P.C.BOARD (VCR+DVD)_COMPONENT SIDE 3-52
SERVICING PRECAUTIONS 1-3 3. SMPS P.C.BOARD 3-54
SERVICE INFORMATION FOR EEPROM IC SETTING 1-4
SPECIFICATIONS 1-5 DVD PART
ELECTRICAL TROUBLESHOOTING GUIDE 3-56
1. SYSTEM OPERATION FLOW 3-56
SECTION 2 CABINET & MAIN CHASSIS 2-1
EXPLODED VIEWS 2-2 2. SYSTEM TEST FLOW 3-57
1. CABINET AND MAIN FRAME SECTION 2-2 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 3-63
2. PACKING ACCESSORY SECTION 2-3 1. SYSTEM 27MHZ CLOCK, RESET, FLASH R/W SIGNAL 3-63
2. SDRAM CLOCK 3-65
3. TRAY OPEN/CLOSE SIGNAL 3-65
SECTION 3 ELECTRICAL 3-1 4. SLED CONTROL RELATED SIGNAL (NO DISC CONDITION) 3-66
OVERALL BLOCK DIAGRAM 3-2 5. LENS CONTROL RELATED SIGNAL(NO DISC CONDITION) 3-66
VCR PART 6. LASER POWER CONTROL RELATED SIGNAL
ELECTRICAL ADJUSTMENT PROCEDURES 3-3 (NO DISC CONDITION) 3-67
ELECTRICAL TROUBLESHOOTING GUIDE 3-4 7. DISC TYPE JUDGEMENT WAVEFORM 3-67
1. POWER(SMPS) CIRCUIT 3-4 8. FOCUS ON WAVEFORM 3-69
2. SYSTEM/KEY CIRCUIT 3-7 9. SPINDLE CONTROL WAVEFORM (NO DISC CONDITION) 3-70
3. SERVO CIRCUIT 3-8 10. TRACKING CONTROL RELATED SIGNAL
4. Y/C CIRCUIT 3-9 (SYSTEM CHECKING) 3-71
5. HI-FI CIRCUIT 3-15 11. MT1389 AUDIO OPTICAL AND COAXIAL OUTPUT(SPDIF) 3-72
6. TUNER/IF CIRCUIT 3-18 12. MT1389 VIDEO OUTPUT WAVEFORM 3-72
BLOCK DIAGRAMS 3-20 13. MT1389 AUDIO OUTPUT TO AUDIO DAC 3-73
1. POWER(SMPS) BLOCK DIAGRAM 3-20 14. AUDIO OUTPUT FROM AUDIO DAC 3-74
2. TU/IF, NICAM & A2 BLOCK DIAGRAM 3-22 BLOCK DIAGRAMS
3. VPS BLOCK DIAGRAM 3-23 1. OVERALL BLOCK DIAGRAM 3-75
4. Y/C BLOCK DIAGRAM 3-24 2. SERVO BLOCK DIAGRAM 3-76
5. HI-FI BLOCK DIAGRAM 3-26 3. MPEG & MEMORY BLOCK DIAGRAM 3-77
6. SYSTEM BLOCK DIAGRAM 3-28 4. VIDEO & AUDIO BLOCK DIAGRAM 3-78
CIRCUIT DIAGRAMS 3-30 CIRCUIT DIAGRAMS
1. POWER(SMPS) CIRCUIT DIAGRAM 1 3-30 1. SYSTEM CIRCUIT DIAGRAM 3-79
2. POWER(SMPS) CIRCUIT DIAGRAM 2 3-32 2. RF & DSP SERVO CIRCUIT DIAGRAM 3-81
3. TU/IF, NICAM & A2 CIRCUIT DIAGRAM 3-34 3. AV/JACK CIRCUIT DIAGRAM 3-73
4. A/V CIRCUIT DIAGRAM 3-36