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TROUBLESHOOTING AND DIAGNOSTICS
NOTE
Because the RAM
test clears all parameters, some of which are needed
for other tests, do not switch arbitrarily from test to test. The RAM
test should be performed first or be the last test which is run. After
each RAM test the unit goes through its power-on sequence.
The following is an example of running the RAM
test as the first test performed.
1. Turn off the power to the unit.
2. Select
the RAM
test (0 on the HP-IB address switch) and jumper the "TEST" test point
to ground (GND).
3. Turn on power.
The unit then begins executing the RAM
test.
The yellow fault LED
remains on during the test.
When
the test is completed, the yellow fault LED
should
blink 5 times.
If the yellow fault LED remains on continously, the test failed.
4. Turn power off.
Select the next test using the HP-IB address switch. Do NOT select the
RAM test (0 or 8).
5. Turn on power.
The unit will begin the specified test.
Again, when the test completes,
the yellow fault LED should blink 5 times. If it doesn't, the test failed. The unit auto-
matically repeats the test until another test selection is made or the unit is turned off.
More tests may be selected, as needed (except the RAM
test) without turning the power off. There is a delay
after the selection of a test until execution of the test is begun.
FAULT
LED INDICATIONS
DURING
MANUAL
EXECUTION
OF SELFTESTS
The yellow fault LED will go on for one second (To show that it works) at the beginning of each test. The
LED will then go on, and stay on, during the length of the test. A pass indication is displayed by the yellow
fault LED blinking 5 times. A failure is displayed by the yellow fault LED remaining on.
8-4
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