LG LHD645B Service Manual

2-42
ELECTRICAL TROUBLESHOOTING GUIDE
No 12 V
No 5 V
Is the VCC supplied
to IC104 pin2?
Is the VCC supplied
to IC102 pin3?
Check 14 VA on SMPS board.
Check 5.5 VA on SMPS board.
YES
YES
YES
YES
NO
NO
Is there signal
at IC104 pin1?
Is there signal
at IC102 pin2?
Check IC108 pin23 (P_CTRL).
Check IC108 pin23 (P_CTRL).
Check IC104 and replace.
Check IC102 and replace.
YES
YES
NO
NO

LG LHD645B Specifications

General

Brand	LG
Model	LHD645B
Category	Home Theater System
Language	English