LG NB3532A - ELECTRICAL TROUBLESHOOTING GUIDE

3-7
ELECTRICAL TROUBLESHOOTING GUIDE
1. RECEIVER BAR TROUBLESHOOTING
1-1. POWER SUPPLY ON SMPS BOARD
No 24 VA
Replace F900 (same fuse).
Check or replace D921.
Replace BD900.
YES
YES
YES
NO
NO
F900 normal?
BD900 normal?
Replace TH900.
D921 normal?
YES
YES YES
NO
NO
TH900 normal?
Is the Vcc
(12 V ~ 24 V) supplied to IC920
Pin4?
Power Line of Main PCB is short.