3-2
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Only for training and service purposes
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1. SMPS TROUBLESHOOTING FLOW
No 3.3VA
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 the D121
YES
NO
Is the D121 normal?
Replace the IC103
YES
NO
Is there about 2.5V at the
IC103 Pin1?
Replace the D123
YES
NO
Is the D123 normal?
Replace the D125
YES
NO
Is the D125 normal?
ELECTRICAL TROUBLESHOOTING GUIDE