7. If the self test generates an error, record the error code and message and contact Agilent 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 annunciator 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, adjust the display intensity.
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.
10. Also verify that the voltage is 3.3 V ± 5% at resistor R121, referenced to the instrument chassis. If this voltage is
incorrect, replace the front-panel board.
Agilent Truevolt Series DMM Operating and Service Guide 295
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