Electrical Troubleshooting Guide; Power Supply On Smps Board - LG BD630N Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER SUPPLY ON SMPS BOARD

No 5.3 VA
YES
Is F101 normal?
YES
Is R101 normal?
YES
Is D103 ~ D106 normal?
YES
Is the V
(13 V~27 V) supplied to IC101
pin7?
YES
Power line of main PCB is short
NO
NO
NO
CC
Replace F101 (same fuse).
Replace R101.
Replace D103 ~ D106.
Is D102 normal?
Check or replace D102.
3-43
YES