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Keysight E4981A 120 Hz/1 kHz/1 MHz Capacitance Meter
User Manual
12 Troubleshooting
This chapter lists items to check if you encounter a problem while using the
Keysight E4981A. All of these items should be carefully investigated before you
determine that your E4981A instrument is faulty.
Check Items When Trouble Occurs
The instrument does not start up (nothing is displayed).
•
•
If normal operation does not resume after taking the above measures, there is
the possibility of a failure. Unplug the power cable immediately and contact
Keysight Technologies' Customer Contact, listed at
www.keysight.com/support, or the company from which you bought the
device.
The system starts up, but the normal measurement screen does not appear
(Service Mode)
The Service Mode is a state that occurs when the power-on test fails. Here, the
characters on the display turn yellow and all of the front panel keys are
unavailable.
•
When the normal measurement screen does not appear, there is the possibility
of a failure. Contact Keysight Technologies' Customer Contact, listed at
www.keysight.com/support, or the company from which you bought the
device.
Check if the power cable is disconnected.
Check if the fuse is blown.
Confirm that the power-on test or a self test has failed.
When the power-on test at start-up fails, the error message "Power on test
failed" is displayed in the system message area.
For details on the Service Mode, refer to the Service Guide.
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