7
Power Supply Troubleshooting
INTRODUCTION
Use this procedure only if you have read
Troubleshooting
, and you believe the problem is in
the power supply. The procedure is designed to let you identify the bad assembly within the
power supply functional group in the shortest possible time.
The power supply functional group consists of:
A40 Pre-Regulator
A50 DC-DC Converter
All assemblies, however, are related to the power supply functional group because power is
supplied to each assembly. Figure 7-1 shows all power lines in simplied block diagram form.
If an assembly is replaced, see
Post Repair Procedures
in the
Post Repair Procedures
chapter in
this manual. It tells what additional tests or adjustments need to be done after replacing any
assembly.
Power Supply Troubleshooting 7-1
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