Keysight Truevolt Series Operating And Service Manual page 483

Service and Repair
6. Turn the instrument on. If the power-on sequence completes and the display appears to function prop-
erly, verify that the instrument is in local mode (the Remote annunciator in the upper right corner of
the display is not on), and run the full self-test ( [Utility] > Test/Admin > Self-Test > Full Test ). If the
display is illegible, replace the front panel board.
Ensure that all connections (front and rear) are removed when self-test is performed. During self-
test, errors may be induced by signals present on external wiring, such as long test leads that can
act as antennas.
7. If the self test generates an error, record the error code and message and contact Keysight support if
necessary.
8. If the self test does not generate an error:
a. If remote I/O on GPIB (optional) is not working, replace the GPIB board.
b. If the measurements are out of specification, you may wish to calibrate the instrument before
deciding to replace the main board.
c. If the front panel buttons are not working, make sure the unit is in local mode (the Remote annun-
ciator in the upper right corner of the display is not displayed). If that does not solve the problem,
replace the front panel board.
d. If the display is dim,
9. If the instrument does not complete the power-on sequence, check the signal frequency at test point
TP200 on the front panel board and verify that it is 29.8 kHz ± 500 Hz. If the frequency is not correct,
replace the front panel board.
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adjust the display intensity.
Keysight True volt Series Operating and Service Guide