4-8 Service Guide N5242-90001
Troubleshooting PNA Series Microwave Network Analyzers
Power Up Troubleshooting N5242A
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 “General Safety
Considerations” on page 1-3 before 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 “If Any Supply Voltage Is Missing” on page 4-9.
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