Keysight N5227B, Service Manual

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4-16 Keysight N5227B Service Guide
Troubleshooting
Front Panel Troubleshooting
4-
Figure 4-4 Front Panel Key Test Utility Dialog Box
Checking the Front Panel Keys
To check the front panel keys, push each key and compare the name in the Key
Label box to the name physically labeled on the key cap. These names are also
in Table 4-2 below. Verify that the Key Label and the Codes match.
— If all the key names are correct, then the front panel keypad is working. If
some of the keys are not working, suspect a faulty keypad. To replace the
keypad, refer to “Removing the A1 Front Panel Interface Board and Keypad
Assembly” on page 7-9 .
— If none of the keys are working correctly, suspect a faulty touchscreen
controller board or the A1 front panel interface board. To replace the
touchscreen controller board, refer to “Removing the Touchscreen
Controller Board” on page 7-10 . To replace the A1 front panel interface
board, refer to “Removing the A1 Front Panel Interface Board and Keypad
Assembly” on page 7-9 .
— To close the Key Label window and return to the instrument display, press
Preset three times.