Smps Power Circuit - LG FA162 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART

8. SMPS POWER CIRCUIT

No 3.7 VA
YES
F901 normal?
YES
TH901 normal?
YES
BD901 normal?
YES
Is the Vcc
(13 V ~ 27 V) supplied to
IC901 Pin5?
YES
Power line of MAIN PCB is short.
NO
Replace F901 (same fuse).
NO
Replace TH901.
NO
Replace BD901.
NO
IC901 normal?
Check or replace IC901.
3-13
YES