Electrical Troubleshooting Guide; Power Check Flow - LG DP372D Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER CHECK FLOW

A.
No 3.3VA
Is
5VA section
working?
YES
Is
VCC_5V section
working?
NO
Check Q305/Q306
and Replace
LGE Internal Use Only
NO
YES
Check Q303/D301
and Replace
YES
Replace U301
B.
No 5VA
BAT_OUT=12V?
YES
Check Q304/D302
and Replace
YES
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NO
Check
D501 Replace
Only for training and service purposes