Trouble Shooting - Daewoo DV6T812N Service Manual

TROUBLESHOOTING
1. POWER CIRCUIT
CAUTION
You must use insulated transformer during the first part test of POWER circuit.
No power
POWER cord is ok?
YES
Is 200V~140V voltage
obtained at C805 +?
YES
Output voltage of 2
parts is normal?
YES
Check
rectifier diode of 2
D821, D822, D823, D825,
D826, D827.
YES
Switching
pulse of IC801 pin#4 or
pin#5 is normal?
YES
NO
NO
NO
nd
NO
nd
parts ;
NO
OK
Exchange POWER CORD
Check F801.
Check IC601,IC701.
Exchange rectifier diode of
nd
2 parts ; D821, D822, D823,
D825, D826, D827.
Check IC801.
5