LG FH6 Service Manual page 39

ELECTRICAL TROUBLESHOOTING GUIDE
SYSTEM POWER SUPPLY ON SMPS BOARD
No 12.5 VA
Is F901 normal?
Is TH901 normal?
Is BD901 normal?
Is the VCC
(14 V ~ 30 V) supplied to IC901
pin2?
Is D954 normal?
Is C956 normal?
Power line of MAIN PCB is short.
YES
YES
YES
YES
YES
YES
YES
NO
Replace F901 (same fuse).
NO
NO
NO
NO
NO
3-20
Replace TH901.
Replace BD901.
Check or replace.
Replace D954.
Replace C956.