Backplane Board Troubleshooting
Troubleshooting the backplane board consists of visually inspecting the pins and pin connections.
If there are missing or broken pins, replace the board.
If there are bent pins, carefully try to straighten the pin. If you are unsuccessful, replace the board.
Closely examine the solder connections at the pins. If there are cracks in the solder, carefully re-
solder the connector. If unsuccessful, replace the board.
Calibration and Passwords
Calibration is not required after the mainframe has been repaired. All calibration information is
module-specific and resides in each power module.
However, if the A5 board that contains the calibration switches has been replaced, any calibration
password that has been set will be lost. Passwords that are used to prevent access to the front panel
Admin menu will also be lost.
The calibration password will automatically be reset to the factory default, which is zero (0). Front
panel access to the Admin menu will be unrestricted unless a password is set.
Refer to
for information on setting the calibration password as well as the Admin
menu password.
Keysight N6705C Operating and Service Guide
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