LG FA163 - SMPS ELECTRICAL FAULT FINDING; SMPS POWER STAGE TROUBLESHOOTING

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Only for training and service purposes
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SMPS ELECTRICAL TROUBLESHOOTING GUIDE
1. POWER (SMPS)
Replace the F101
(Use the same Fuse)
NO .5.6VA
Is the F101
Normal?
Replace the BD101
Is the BD101Normal?
Replace the R101
Is the TH101 Normal?
Is the D102 normal?
Is Vcc (9V-18V)
supplied to IC101 Pin2?
YES
YES
YES
YES
YES
YES
YES
YES
Check or Replace the
D102
IS the D959 normal?
Replace the IC103
Replace the D959
Is there
about 2.5V at the
IC103 Pin1?
NO
NO
NO
NO
NO
NO
jomi