Agilent Technologies Infiniium 90000 A, Service Manual

Page: 55 / 148

Chapter 4: Troubleshooting
Primary Trouble Isolation
55
D
Check the front panel response by running the Keyboard and LED self tests.
Use this procedure to verify correct keyboard operation.
1 Select Self Test from the Utilities menu.
2 Select Keyboard Test from the Self Test drop down list box, then click Start.
A new window appears with a symbolic representation of the keyboard. See Figure 4-2.
Figure 4-2
Knob and Key Self Test Screen
3 Press each key on the keyboard until you have pressed all keys.
When you press a key or turn a knob, the bar above the corresponding key/knob
symbol on the display should change from red to green.
4 Turn each knob in both directions until you have turned all knobs.
When you turn a knob in one direction, half the rotation arrow under the
corresponding knob symbol should turn green. When you then turn the knob in the
other direction, the entire rotation arrow under the knob symbol should turn green.
5 When you are finished, click Close.
6 If any of the knobs or keys do not work, go to To check the keyboard; Trouble Isolation
Procedure 84.
Use the following procedure to test the front-panel LED (light-emitting diode) indicators.
1 Select Self Test from the Utilities menu.
2 Select LED Test from the Self Test drop-down list box, then click Start Test.
The LED test screen appears, which shows a symbolic representation of all front panel LED
indicators. See Figure 4-3.
When you press a key
or turn a knob in both
directions, the
corresponding
symbol on this screen
turns green.