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TROUBLESHOOTING
1
Does the fan run when the
main POWER supply is
turned ON?
YES
4-13
NO
Is 12V available at Pin
P0F1/P0F2?
Is 5V available at Pin
P0F1/P0F2?
Is 5V available at Pin
IC9704?
Is 0V available at Pin
IC9704?
Fault in IC9704 and its
peripheral circuits
1
NO
of
YES
3
YES
of
NO
5
NO
of
YES
4
NO
of
YES
Fault in IC9705 and its
oeripheral circuits
The fan is out of order on the
side where 5V is available.
As this voltage becomes 0V
when the power supply is turned
OFF, this check should be
carried out after connecting
a circuit tester in advance.
Fault in IC9704 and its
peripheral circuits
Fault in IC9501 and its
peripheral circuits
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