HP 54645A - To Run the Internal Self-Tests

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