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Troubleshooting
Power Up Troubleshooting
Figure 4-2
A15 Midplane Board Power Supply LED Indicators and Measurement Points
WARNING
The instrument contains potentially hazardous voltages. Refer to the safety symbols
provided on the instrument and in
operating the unit with the cover removed. Make sure that the safety instructions are
strictly followed. Failure to do so can result in personal injury or loss of life.
CAUTION
Do not operate the analyzer with the outer cover removed for more than 30 minutes, as this
could cause the analyzer to overheat which could result in costly damage.
NOTE
If any one individual voltage supply from the A16 power supply develops an over-voltage or
over-current problem, all supplies are affected. The cause of the over-voltage or over-current
condition can be the A16 power supply itself, or any assembly to which the A16 power
supply provides voltage. To isolate the cause, continue to the assembly removal process as
described in the section titled
4-8
PNA Series Microwave Network Analyzers
"General Safety Considerations" on page 1-3
"If Any Supply Voltage Is Missing" on page
N5221A/22A
before
4-9.
Service Guide N5222-90001
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Table of Contents
Troubleshooting
