HP 8753D Option 011 Service Manual page 139

Digital Control
Observe the Power Up Sequence
Switch the analyzer power o , then on. The following should take place within a few seconds:
1. On the front panel observe the following:
ll six amber LEDs illuminate.
The amber LEDs go o after a few seconds, except the CH 1 LED.
See Figure 4-5.
2. The display should come up bright and focused.
3. Four red LEDs on the 9 CPU board should illuminate. They can be observed through a
small opening in the rear panel.
Figure FPPUS4 here.
Verify nternal Tests Passed
1. Press
RESET SYSTEM
5
display should indicate:
TE T
0 ALL INT
If your display shows the above message, go to step 2. Otherwise, continue with this
step.
If phase lock error messages are present, this test may stop without passing or failing. In
this case, continue with the next procedure to check the source.
4-10 Start Troubleshooting Here
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Figure 4-5. Front Panel Power Up Sequence
ERVICE MENU TE T
5
PA
INTERNAL TE T EXECUTE TE T
. The
RAFT
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