Service Guide E8364-90038
4-7
PNA Series Microwave Network Analyzers
Troubleshooting
E8362C, E8363C, E8364C
Power Up Troubleshooting
Power Supply Check
NOTE
There are no fuses to replace within the power supply. If you determine that the power
supply is the failed assembly, replace the power supply.
A catastrophic failure in the power supply can be determined by observing the line switch:
1. Ensure that the instrument is plugged in with the power switch in the standby position (power not
switched on). Verify that the line switch glows yellow. A line switch that glows yellow indicates that the
+15 VDC line (P15 STB) is providing enough voltage to light the LED. (The actual voltage may not be +15
VDC.)
2. Turn on the instrument power and verify that the line switch glows. When the line switch glows, it is an
indication that the power supply has received an “ON” command and that the +5.2 VDC supply can
supply enough current to light, at least, these lamps.
If these supply voltages are missing, it is likely that the problem is either a defective A4 power supply, or
another assembly is loading down the A4 power supply. Continue with
“If All Supply Voltages Are Missing”
on page 4-9
, to determine the cause of the problem.
If the line switch is lit correctly, the power supply has not suffered a catastrophic failure; however, the power
supply could still be at fault. Continue with the next section to measure the individual voltage supplies.
Summary of Contents for E8362C
Page 11: ...Service Guide E8364 90038 1 1 1 Safety and Regulatory Information ...
Page 21: ...Service Guide E8364 90038 2 1 2 General Product Information ...
Page 33: ...Service Guide E8364 90038 3 1 3 Tests and Adjustments ...
Page 81: ...Service Guide E8364 90038 4 1 4 Troubleshooting ...
Page 137: ...Service Guide E8364 90038 5 1 5 Theory of Operation ...
Page 171: ...Service Guide E8364 90038 6 1 6 Replaceable Parts ...
Page 257: ...Service Guide E8364 90038 7 1 7 Repair and Replacement Procedures ...
Page 341: ...Service Guide E8364 90038 8 1 8 General Purpose Maintenance Procedures ...