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4040
DC Power Input Service Check
FRU
1
AC Power
2
Overcurrent/
Overvoltage
Detection
Circuit
3
Fuse
Power Sup-
4
ply
5
System Board
Action
If the ac power is not present, go to
Input Service Check" on page
The overcurrent/overvoltage detection circuit
may be active. If the problem does not disap-
pear when the power switch is turned off and
on again, find the cause of activation of the
overcurrent/over voltage detection circuit of
the power supply. Turn the power switch off for
2 minutes then turn it on again.
The fuse may be blown. Remove the power
supply and replace the fuse (5-15)
The power supply may be defective. Turn the power
switch off and remove connector J204 from the sys-
tem board. Plug in the power cable and turn the
power switch on. Measure the DC power supply
output of connector J204. Do not short the connec-
tor. If the correct value is not outout, replace the
power supply (5-10)
Turn the power switch off. Check the wiring
from the system board J204 and the power
supply. If they are normal, replace the system
board (4-9)
.
2-16.
Diagnostic Information 2-17
"AC Power
.
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