System Part - LG BH9530TW Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

4. SYSTEM PART

Power on
YES
Stand-by LED
OK?
YES
4A
4B
NO
3.3 VA, 3.8 VA
OK?
IC100: 3.3 VA /
IC150: 1.5 V, 1.2 V /
IC155: 3.3 V OK?
X501
27.000 MHz
OK?
Replace IC501 MT8580.
3.3 VA
OK?
IC3T1 3.3 VA OK?
2-54
NO
YES
NO
YES
NO
YES
NO
YES
NO
Check D101
and 3.8 VA on SMPS board.
Check IC100 / IC150 / IC155
and SMPS board.
Replace X501.
Main Board
Front Board
Check CN301 pin11.
Check IC3T1.
Touch Board