Daewoo DSJ-4710CRA, Service Manual

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41
TROUBLE SHOOTING
When power isn’t supplied
Switch relay (RLY) doesn’t work
Check bridge rectifier diode (D801-D804)
Check if both terminals of power cord are open
Check PA802 PWR SW signal is high
Q802 works normally
RLY1(Switch relay) works normally
Check a part causing 2nd power short
Check I802, I803 #3 voltage waveform
580VP-p
30-50KHz
END
Replace a part causing short
or troubleshoot
Replace a part causing SMPS 1st
circuit error.
Replace RLY1
Replace Q802
Check if main assy is high
Check a part causing short and replace the part.
Replace D801-D804
F801 fuse is normal
Replace F801 fuse
NO
NO
NO
NO
NO
NO
NO
NO