Agilent Technologies N5242A, Service Manual

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4-4 Service Guide N5242-90001
Troubleshooting PNA Series Microwave Network Analyzers
Getting Started with Troubleshooting N5242A
Getting Started with Troubleshooting
Where you begin troubleshooting depends upon the symptoms of the failure. Start by
checking the basics as outlined in the following section. Also review the flowchart in
Figure
4-1 on page 4-5 . You should then be able to determine where in the troubleshooting
procedure to begin, to locate the failed assembly.
Check the Basics
A problem can often be solved by repeating the procedure you were following when the
problem occurred. Before calling Agilent Technologies or returning the instrument for
service, please perform the following checks:
1. Is there power at the mains receptacle? If not, correct this situation and proceed.
2. Is the instrument turned on? Check to see if the front panel line switch glows. This
indicates the power supply is on. If the front panel line switch is on but the power
supply does not appear to be on, go to
“Power Up Troubleshooting” on page 4-6 .
3. Is the Windows
®
operating system running? If not, refer to “Operating System
Recovery” in Chapter 8 for instructions.
4. If other equipment, cables, and connectors are being used with the instrument, make
sure they are clean, connected properly and operating correctly.
5. Review the procedure for the measurement being performed when the problem
appeared. Are all the settings correct? If not, correct them.
If the instrument is not functioning as expected, return the unit to a known state by
pressing the UTILITY key.
6. Is the measurement being performed, and the results that are expected, within the
specifications and capabilities of the instrument? Refer to the embedded help in the
analyzer for instrument specifications.
7. If the problem is thought to be due to firmware, check to see if the instrument has the
latest firmware before starting the troubleshooting procedure. Refer to “Firmware
Upgrades” in Chapter 8 for instructions.
8. If the necessary test equipment is available, perform the operator’s check and system
verification in Chapter 3, “Tests and Adjustments.”
Windows® is a U.S. registered trademark of Microsoft Corporation.
Preset