Troubleshooting - Daewoo DV6T811N-LT Service Manual

3.

TROUBLESHOOTING

1. POWER CIRCUIT
CAUTION
You must use insulated trance during the first part test of POWER circuit.
No power
POWER cord is ok?
YES
Is 400~140V voltage
obtained at C805 +?
YES
Output voltage of 2
parts is normal?
YES
rectifier diode of 2
D821, D822, D823, D825,
D826, D827, D828.
YES
Switching
pulse of IC801 pin#4 or
pin#5 is normal?
YES
NO
NO
NO
nd
Check
NO
nd
parts ;
NO
OK
Exchange POWER CORD
Check
G801,L801,L802,D801.
Check IC601,IC701.
Exchange rectifier diode of
nd
2 parts ; D821, D822, D823,
D825, D826, D827, D828.
Check IC801.
5