3-9
1. SMPS TROUBLESHOOTING FLOW
No 5 VA
Replace the FR101
(Use the same ICW)
YES
YES
NO
Power Line of Main
PCB(DVD) is short
Is the FR101 normal?
Replace the
D105/D106/D107/D108
YES
NO
Is the D105/D106/D107/
D108 normal?
Check or Replace the IC101
YES
NO
Is the Vcc (about 17V)
supplied to IC101 Pin2?
Replace D123
or check if any short circuits
YES
NO
Is the D123 normal?
Replace the IC103
YES
NO
Is there about 2.5V at
the IC103 Pin1?
Replace D125
or check if any short circuits
YES
NO
Is the D125 normal?
Replace T101, IC102, IC103
YES
NO
Is the transformer
or feed back circuits
ELECTRICAL TROUBLESHOOTING GUIDE
jomi