LG OM4560 Service Manual page 38

ELECTRICAL TROUBLESHOOTING GUIDE
No 12 V
YES
Is VIN (34 VA)
Supplied to IC602?
YES
Is 12 VA Supplied
To L611?
YES
Check or replace IC602
No VFD
YES
Is the power supplied from the
Pin8, Pin9, Pin10 of CN801?
YES
D801/ D805/ D806 normal?
YES
DIGI800 Pin26 normal?
YES
Check or replace VFD.
NO
Check the PVDD (34 VA) from SMPS.
NO
Check the IC602 Pin2 "H".
NO
Check the Pin4, Pin5, Pin6 from CN503.
NO
Check or replace D801/ D805/ D806.
NO
Check or replace DIGI800.
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