To Run The Internal Self-Tests - HP 54645A User's And Service Manual

Testing, Adjusting, and Troubleshooting

To run the internal self-tests

To run the internal self-tests
Perform the display test.
1
Press
a Print/Utility
Press Service Menu, then Self Tst Menu and Display.
b
Do the half-bright and full-bright squares appear?
c
If yes, continue with the steps below. If not, replace the display.
Press any key to continue.
d
Do squares appear in the four corners?
e
If yes, the display is good. If not, replace the display.
Press any key to end the test.
f
If you still have the failing symptom, replace the system board.
g
Perform the keyboard test.
2
Press the Keyboard softkey.
a
A pictorial diagram of the front panel will appear on the display.
Press each key, and notice that when you press a key a corresponding
b
block on the display fills in.
Rotate the knobs (except the intensity) and notice that an arrow
c
appears on the display that points in the direction you rotate the knob.
Do all the keys and knobs work?
d
If yes, press
Stop
many times), then go to step 3. If not, replace the keyboard.
Check the output level of the
3
Press the DAC softkey.
a
Connect a multimeter to the rear panel
b
The multimeter should read 0 V 500 V.
Press any key to continue.
c
The multimeter should read 5 V 10 mV.
Are the DAC voltages correct?
d
If yes, press any key to continue. If not, replace the system board.
7-50
.
two or three times (the display indicates how
.
DAC
CALIBRATOR
connector.