LG S95A1-D - Power Supply on Main Board

2-13
ELECTRICAL TROUBLESHOOTING GUIDE
NO 3.7 VA
NO 3.3 VA (MICOM)
Is 25 VA to pin7
of IC305 normal?
Is 3.7 VA to pin3
of IC308 normal?
Check 25 VA on SMPS board.
Check IC305 & 3.7 VA power line.
YES
YES
YES
YES
YES
YES
NO
NO
Is D301 normal?
Is R350 & IC308 normal ?
Is switching pulse of
IC305 pin1 normal?
Are R351, R353, R354 normal ?
Replace D301.
Replace R350 & IC308.
Replace IC305.
Replace R351, R353, R354.
NO
NO
NO
NO
3.7 VA power line is normal.
3.3 VA power line is normal.
YES
YES
2. POWER SUPPLY ON MAIN BOARD