LG HX966TZ Service Manual page 109

ELECTRICAL TROUBLESHOOTING GUIDE
No 1.2 V
YES
Is the
Vcc 14 VA supplied to IC150
pin2?
YES
Is there 3.3 V at
IC150 pin6?
YES
Check IC150 and replace.
No 1.5 V
YES
Is the
Vcc 14 VA supplied to IC151
pin2?
YES
Is there 3.3 V at
IC151 pin6?
YES
Check IC151 and replace.
NO
Check 14 VA on SMPS board.
NO Check the DCDC12_CTRL line
from IC101(pin60).
NO
Check 14 VA on SMPS board.
NO Check the DCDC15_CTRL line
from IC101(pin59).
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