Power Up Troubleshooting - Keysight N5221A Service Manual

Troubleshooting

Power Up Troubleshooting

Power Up Troubleshooting
WARNING Immediately unplug the instrument from the ac power line if the unit shows any of the
following symptoms:
• Smoke, arcing, or unusual noise from inside the analyzer.
• A circuit breaker or fuse on the main ac power line opens.
Check your network analyzer for evidence that it is powering up correctly. Perform the following steps and
make sure that the analyzer is displaying correct behavior as noted in the following steps.
Step 1. Disconnect all peripherals and plug in the network analyzer. Before the analyzer is powered on,
the line switch should glow yellow and no other lights should be on.
Step 2. Turn on the network analyzer.
• The line switch should glow green.
• The fans should be audible.
• The display should flash and then show the hardware boot-up sequence. This process checks
the RAM and communication with the hard disk drive. These checks return an error message
if a problem is detected.
• The Windows operating system should start.
• The network analyzer measurement interface should open with an S
displayed.
Step 3. If the analyzer powers up correctly, continue troubleshooting with
on page 4-13.
Step 4. If the analyzer does not power up correctly, follow these troubleshooting steps:
• If the line switch does not glow, go to
• If you cannot hear the fans operating, go to
• If the line switch glows green and the fans are operating (audible), but the display remains
dark, go to
• If the instrument appears to abort the network analyzer measurement interface process,
contact Keysight. Refer to
4-6
"Troubleshooting LCD Display Problems" on page
"Contacting Keysight" on page
PNA Series Microwave Network Analyzers
"Front Panel Troubleshooting"
"Power Supply Check" on page
"If the Fans Are Not Operating" on page
4-12.
2-8.
N5221A/22A
measurement
11
4-7.
4-11.
Service Guide N5222-90001