5
TROUBLESHOOTING
1. POWER CIRCUIT
✓
CAUTION
You must use insulated transformer during the first part test of POWER circuit.
Check IC501, IC701
No power
POWER cord is ok?
Is 400V~200V voltage
obtained at C804 +?
Output voltage of 2
nd
parts is normal?
Check
rectifier diode of 2
nd
parts ;
D821, D822, D823, D824,
D825, D826, D827
Switching
pulse of Q801 collector is
normal?
OK
Exchange POWER CORD
Check F801.
Exchange rectifier diode of 2
nd
parts ; D821, D822, D823, D824,
D825, D826, D827.
Check Q801.
NO
YES
YES
YES
YES
YES
NO
NO
NO
NO
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Summary of Contents for DC-B84D1P
Page 29: ...28 CIRCUIT DIAGRAM 3 A V CIRCUIT DIAGRAM All manuals and user guides at all guides com...
Page 37: ...36 PCB CIRCUIT BOARD 1 1 VCR MAIN All manuals and user guides at all guides com...
Page 38: ...37 PCB CIRCUIT BOARD 1 2 POWER All manuals and user guides at all guides com...
Page 39: ...38 PCB CIRCUIT BOARD 1 3 DVD MAIN All manuals and user guides at all guides com...
Page 45: ...44 INSTRUMENT DISASSEMBLY G Explode view All manuals and user guides at all guides com...
