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TROUBLESHOOTING
AND DIAGNOSTICS
flexible disc drive is used heavily(If the disc has been used heavily with some types of media it is
possible that the head may require cleaning before HP double-sided media will perform prop-
erly. The only means to do this is to use the SS/80 Exerciser on the HP 85.
2. Verify failure by using Test #4 (see page
8-8) on a customer data disc (verifies but does not
change data) if read problems are occurring.
3. Check read/write performance using Test #5 on a scratch disc. (Formats the disc)
NOTE
Tests #4 and 45 will continue to loop until an error is detec-
ted, at which point the test will terminate
and the FAULT
LED will remain on continuously.
4. Replace drive if failure is indicated.
5. If failure persists, replace the original drive in the product and replace the controller board.
1. Attempt to verify that failure is the Winchester disc using Test #7.
2. If Test 47 does not indicate a failure, replace the controller.
3. If failure persists, replace the original controller in the product and replace the Winchester disc
drive.
Neither drive can be accessed
1. Replace controller board
REPAIR VERIFICATION
After repair of the product, the repair should be verified to ensure that the product is operating properly.
If the test is on the flexible disc drive, format
a disc using either a host computer
which supports the
product, the SS/80 Exerciser, or Service Selftest number
$.
If the SS/80 Exerciser is available, the
R/W__TEST
module can be used to loop on a write/read test.
Test number
5 formats a flexible disc, and
will continue to loop on that test until the test fails, thus providing
a means to exercise the product without
operator intervention.
If the repair is on the Winchester disc drive and if there is no customer data on the disc, the repair can be
verified by formatting the disc.
If the disc has been divided into volumes, each volume must be formatted.
If the customers data must be preserved on the disc, the R/W__TEST
module in the SS/80 Exerciser
provides a read-only test which will not affect customer
data.
Test number
7 also provides a verify test
which will not affect customer data, and allows the test to execute continuously until an error is detected.
1f the repair is on the controller, repair can be verified by performing write and read operations on both
drives.
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