To Check Out The Oscilloscope - HP 54616B User And Service Manual

Service
Troubleshooting the Oscilloscope

To check out the oscilloscope

Is there an interface module connected to the oscilloscope?
1
If yes, do the following steps. If not, go to step 2.
Turn off the oscilloscope.
a
Remove the module.
b
Turn on the oscilloscope, then check for the failing symptom.
c
If the failing symptom disappears, replace the module. If not, go to
step 2.
Turn off the oscilloscope for 30 seconds minimum and then turn on
2
the oscilloscope again.
If an error message (example: Vertical cal factors failed
checksum test-defaults loaded) appears within the waveform
display area, go to "To clear error messages", on page 4–37. If error messages
do not appear, go to step 3.
Disconnect any external cables from the front panel.
3
Disconnect the power cord, then remove the cover.
4
Connect the power cord, then turn on the oscilloscope.
5
If the display comes on after a few seconds, (HP logo and copyright text,
followed by a graticule with text at top of the display) go to "To check the
Low Voltage Power Supply," on page 4-40. If, after checking the Low Voltage
Power Supply, the voltages are within the test limits, go to step 9. If not, go
to step 7. If the display did not come on, do the steps below.
Check the intensity knob (HP 54615B/16B only) to see if it is set too
a
low for viewing.
If there is still no display, disconnect the power cord.
b
Check all cable connections.
c
Go to "To check the Low Voltage Power Supply," on page 4-40.
d
If the voltages are within the limits go to step 6. If not, go to step 7.
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