Power Supply On Main Board - LG BD630N Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

2. POWER SUPPLY ON MAIN BOARD

No 3.3 V
YES
Is the
Vcc supplied to D216
anode?
YES
Is the D216 output 5.3 VA?
YES
Is there
signal at IC207
pin1?
NO
Check IC207 and replace.
No 1.2 V
YES
Is the
Vcc 3.3 V supplied to IC204
pin3 ?
YES
Check IC204 and replace.
NO
Check 5.3 VA on SMPS board.
NO
Check C237 or replace D216.
YES
Check voltage on IC501.
NO
Check 3.3 V on main board.
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