5
Power
Supply
Troubleshooting
Use this procedure only if you have read Chapter 4, “Start Troubleshooting
Here.” Follow the procedures in the order given, unless:
q an error message appears on the display, refer to “Error Messages” near the
end of this chapter.
q the fan is not working; refer to “Fan Troubleshooting” in this chapter.
The power supply group assemblies consist of the following:
n
A8
post regulator
n
Al5
preregulator
All assemblies, however, are related to the power supply group because power is
supplied to each assembly.
Powor Supply Troubleshooting
5-l