LG DP122 Service Manual page 25

ELECTRICAL TROUBLESHOOTING GUIDE
No 14 VA
YES
Is the 14 VA
on cathode of D125?
YES
Is the 5 VA
on cathode of D123?
YES
Check or replace transformer
No 12 V
YES
Is the 14 VA supplied to
emitter of Q603
YES
Is the 12 V output
on collector of Q603?
YES
Check 12 V line circuits
NO
or check if any short circuits
NO
Check 5 VA troubleshooting flow
NO
Check 14 VA troubleshooting flow
NO Check Power control H from IC601
It must be High state during power on
3-10
Replace D125