LG LHB976 Service Manual page 125

ELECTRICAL TROUBLESHOOTING GUIDE
2. WIRELESS RECEIVER TROUBLESHOOTING
-1.
2 POWER SUPPLY ON SMPS BOARD
No 5.8 VA
YES
Is the F901 normal?
YES
Is TH901 normal?
YES
Is BD901 normal?
YES
Is the Vcc
(11 V ~ 25 V) supplied to IC901
pin7?
YES
Power line of MAIN board is short.
NO
Replace F901(same fuse).
NO
Replace TH901.
NO
Replace BD901.
NO
Is D922 normal?
Check or replace D922.
2-110
YES