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6. SMPS
DC 5V is not output.
Is IC4140 (TOP268VG) damaged?
NO
Is the fuse (F4140) functioning proper-
ly?
NO
Are there any short circuits caused by
the soldering on the PCB?
NO
Are any parts damaged?
YES
Replace the IC4140 (TOP268VG) and
D4142 / D4143 /D4144 / D4145.
YES
Is D4142, D4143, D4144, D4145 or
IC4140 damaged?
YES
Repair the short circuited area on the
PCB.
YES
Check the damaged parts.
88
YES
Replace the damaged part.
YES
Replace the damaged part.
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