Electrical Troubleshooting Guide; Power Supply (Smps) - LG BD370 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER SUPPLY (SMPS)

no 5.3va
Is the
F101 normal?
YES
is Bd101 normal?
YES
is the r101 normal?
YES
is vcc (13v~27v)
supplied to IC101
Pin4?
YES
is there about
2.5v at the ic103
Pin1?
YES
is the ic102 normal?
YES
Power line of main PcB is short
LGE Internal Use Only
NO
replace F101 (same fuse)
NO
replace Bd101
NO
replace r101
NO
is d102 normal?
check or replace the d102
NO
replace ic103
NO
replace ic102
3-30
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YES
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