4-4 Keysight N9912A Service Guide
Troubleshooting
Getting Started with Troubleshooting
4-
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 Keysight 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 CAT 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.
Troubleshooting Organization
Follow the flowgraph in Figure 4-1 to help direct you to the correct section for
troubleshooting the analyzer.
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