One Point Repair Guide; Power Problem - LG BP540N Service Manual

1. NO POWER PROBLEM
No power problem occurs when you power on the unit.
1-1. Fuse & bridge diodes
1-1-1. Solution
Replace F101, D103 ~ D106, R101 on SMPS board.
1-1-2. How to troubleshoot (Countermeasure)
1) Look at the physical of fuse F101.
2) Check the bridge diode D103/ D104/ D105/ D106.
3) Check the R101 short or open.
RECTIFIER
(primary)
Fuse
AC85~264V
1-1-3. Service hint (Any picture / Remark)
< Fuse, F101 >

ONE POINT REPAIR GUIDE

SWITCHING IC
< Bridge diode, D103 ~ D106 >
3-27
No Power
D103~D106 are Defective
S/W Error
IC101 is Defective
No Power
F101 is Defective
No Power
R101 is Defective
< Resistor, R101 >
If R101 open state,
it is change new component.
No Power
D102 is Defective
Switching
IC102/IC103 ar