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TROUBLESHOOTING
AND DIAGNOSTICS
the drive and the drive passes.
If either the flexible or Winchester disc drive fails the power-on test, but the
other is fully functional (9153A), the good drive may be used.
No drive may be used if the yellow fault
LED is on continuously.
FAULT LED INDICATIONS DURING POWER-ON
The yellow fault LED will give an indication of what has failed during the power-up test as follows:
1. Both LEDs (fault LED
and Winchester
access LED) stay off.
The microprocessor has failed.
Replace the Controller PCA.
2. Both LEDs stay on.
The microprocessor
failed power-on
test or the main CPU
RAM
failed.
Replace the Controller PCA.
3. FAULT
LED
on 6 seconds, blinks off 7 times, repeats.
HP-IB
Personality
interface
module
failed. Replace the Interface
4. FAULT
LED
on 6 seconds, blinks off 6 times, repeats.
The HP-IB
Interface
Module
failed.
Replace the Interface module.
5. FAULT LED on 6 seconds, blinks off 2 times, repeats.
Processor RAM
is bad.
Replace the Con-
troller PCA.
6. FAULT
LED
on 6 seconds, blinks off 1 time, repeats.
Rom
checksum
is wrong.
Replace the
Controller PCA.
~
. FAULT
LED on 6 seconds, blinks off 3 times, repeats.
The buffer RAM
is bad.
Replace the
Controller PCA.
. FAULT
LED on 6 seconds, blinks off 4 times, repeats.
The configuration switches are set to an
illegal configuration.
Check the settings with Figure
3-5 in Chapter
3. The switches are
located near the center of the board.
_
oo
. FAULT
LED on 6 seconds, blinks off 5 times, repeats.
The HP-IB chip is bad.
Replace the In-
terface Module.
NO
If all of the tests passed, then the FAULT LED goes out and the 9153A/9154A is ready for use.
MANUAL EXECUTION OF SELECTABLE SELFTESTS
There are 8 selectable selftests available. The list of tests follows after this explanation of procedure and the
example of running the RAM test.
To run the tests, the HP-IB
address switch should be set to the desired test number
and the "TEST" test
point, located to the right of the flexible disc cable connector (J4), must be shorted to ground (GND).
8-3
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