Agilent Technologies FieldFox MW N9913A, Service Manual, Page: 40 / 156

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Troubleshooting FieldFox Analyzer
Getting Started with Troubleshooting
Getting Started with Troubleshooting
Where you begin troubleshooting depends upon the symptoms of the failure. If a performance test or
adjustment fails, refer to the troubleshooting recommendations in the N7841A TME Help . For
other failures, 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. Does the analyzer have power available? It is recommended that the battery is installed and the AC
power adapter is also connected.
2. Does the analyzer turn On and Off when the On/Off Button is pressed? When the unit is on, the green
LED below the button should light.
3. Does the analyzer power up normally into its default mode? If not, see “Power Up Troubleshooting”
on page 4-6 .
4. If other equipment, cables, and connectors are being used with the analyzer, 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.
6. If the analyzer is not functioning as expected, return it to a known state by pressing the
Preset
key.
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.