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TROUBLESHOOTING
AND DIAGNOSTICS
EXECUTION OF SERVICE SELFTESTS
There are eight selectable service selftests available.
The list of tests follows this explanation of procedure
and the example of running the RAM test.
The Service Selftests are enabled as follows:
1. Remove power from the unit to be tested.
2. Select the test to be executed with the HP-IB address switch. (See P.8-8 for a description of the test.)
3. Set the "TEST" section of SW3 to ON (See Figure 8-8)
4. Apply power to the unit.
5. The following sequence of events should occur:
a. The unit will go through a complete power up sequence. The ONLINE
and flexible disc drive
ACCESS LED will be off at the conclusion of the power-on sequence.
b. The FAULT LED remains on for approximately 4 seconds, blinks off, then comes on again as ex-
ecution of the selected test begins.
c. If the selected test is successful, the FAULT
LED
will blink off five times, remain on for ap-
proximately four seconds, then repeat the test.
Additional tests may be selected by moving the
HP-IB switch to the desired test if the current test is not the RAM
test (Test 0). See procedure
for RAM test below.
d. If the test fails, the FAULT LED remains on at the completion of the test, no further testing oc-
curs, and no other Service Selftest can be selected without power cycling the unit.
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 must go 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 set the "TEST" switch of SW3
to the TEST position.
3. Turn on power.
The unit will go through a complete power-on sequence, then begins ex-
ecuting the RAM
test.
The FAULT
LED remains on during the test.
When
the test is
completed, the FAULT LED should blink 5 times.
If the FAULT LED remains on con-
tinuously, the test failed.
4. Turn power off. Select the next test using the HP-IB address switch. Do NOT select the
RAM test.
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.
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