LG LHD645 Service Manual

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ELECTRICAL TROUBLESHOOTING GUIDE
No 3.3 VA
Is the VCC supplied
to IC103 pin1?
Check 5.5 VA on SMPS board.
YES
YES
NO
Check IC103 and replace.
No 3.3 V
Is the VCC supplied
to IC105 pin3?
Check 5.5 VA on SMPS board.
YES
YES
NO
Is there signal
at IC105 pin2?
Check IC108 pin23 (P_CTRL).
Check IC105 and replace.
YES
NO
2. POWER SUPPLY ON MAIN BOARD

LG LHD645 Specifications

General

Brand	LG
Model	LHD645
Category	Home Theater System
Language	English