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Power Supply Troubleshooting
INTRODUCTION
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
• A9 Floating Power Supply
All assemblies, however, are related to the power supply functional group because power is
supplied to each assembly.
Figure 5-1 shows all power lines in simplified 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.
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