System Part - LG XV-BD212 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

4. SYSTEM PART

Power cord in
YES
"BOOT" display
on FLD OK?
YES
Power on.
YES
A
B
CN150
NO
VKK, FL-, +
check OK?
YES
VFD_CLK
DO, STB
OK?
YES
Check DIS301.
NO
PWR_SENS
check OK?.
YES
PWR_CTRL
check OK?
YES
Replace of IC101
UPD78F1166.
2-51
Check CN150
NO
& SMPS board.
NO
Check R362, R363, R364
vol. level.
NO
Replace DIS301.
Check Noise cap.
NO
& SMPS board.
NO
Check R166 vol. level.