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Troubleshooting guide
1. Trouble diagnosis of power
2. No DC output
No power
Check if C539
has 5V
No
Check if C533
has voltage over
100V
No
Check the fore
circuit of fuse
and rectifier.
No DC output
(Vsb normal)
Check
32VSC,
5VSC
Yes
Check if 24VCF,
24VSC, 18VSC
is normal
No
Check if the voltage of
C533
is
about
395V(less than 370V is
abnormal)
No
Check L6563 and its
periphery
(include
the VCC)
Yes
Check N503
Yes
Check N501 and its periphery (include
transformer and the secondary sample
feedback circuit.
Check the fore
circuit
Yes
No
Check if Standby
is high level
Yes
Check N504 and
the
correlative
circuit
Yes
Check N512 and its periphery
(include VCC, transformer
and the secondary sample
feedback circuit)
37
Check
the
correlative circuit
No
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