One Point Repair Guide; Power - LG OM5541 Service Manual

1. NO POWER
If the unit doesn't work by no power problem, repair the set according to the following
guide.
(1) FUSE & BRIDGE DIODE
[ Solution ]
Please check and replace F901, BD901, TH901 or TH903 on SMPS board.
[ How to troubleshoot (Countermeasure) ]
1) Check if the fuse F901 is open or short-circuit.
2) Check if the bridge diode BD901 is short-circuit by over current with a digital multi meter.
3) Check if the NTC thermistor TH901 or TH903 is normal or open.
[ Service hint (Any picture / Remark) ]
< F901 >
If F901 is not short-circuit,
replace it with a same
specifi cations one.

ONE POINT REPAIR GUIDE

< SMPS circuit diagram >
< BD901 >
If BD901 is short-circuit,
replace it with a new one.
3-2
< TH901 >
If TH901 is open,
replace it with a new one.