Self-Test Control Operation - HP 7925D Service Manual

7925
Appendix A
Table A-7. Self-Test Control Operation
SWITCH SETTING
OP/SERVICE
switch: OP
TEST NUMBER
switches: Any setting
START switch:
Momentary operation
OP/SERVICE
switch: OP
TEST NUMBER
switches: Any setting
START switch:
Held in on position
2
OP/SERVICE
switch: SERVICE
3
TEST NUMBER
switches: n
'>
2
START switch
Momentary operation
OP/SERVICE
switch: SERVICE
3
TEST NUMBER
switches: 2
START switch:
Momentary operation
OP/SERVICE
switch: SERVICE
3
TEST NUMBER
switches: 1
START switch:
Momentary operation
OP/SERVICE
switch: SERVICE
3
TEST NUMBER
switches: 0
START switch:
Momentary operation
SELF-TEST ACTION
Tries to execute all tests once. If error in test 17,
16, or 15, controller hangs~ If error in tests 14
through 1, exits immediately to controller
firmware.
Loops on entire self test until START switch is re-
leased. Exits test only when switch is released.
Executes tests up to first error and then restarts
self test.
Loops on test n until first error is detected. Halts
(JMP*) on error until START switch is set
again (except for error in test 17, where con-
troller hangs).
Generates PHI tuning procedure.
Causes disc drive to do random seeks.
Loops on entire self test until error is detected.
Halts on error until START switch is set again
(except for errors in test 17, where controller
hangs).
LED DISPLAY
All LED's flash momentarily. If there is an error,
TEST RESULT LED's display failed test number,
S.T. FAILED LED is also lit. If there is no error,
all LED's go off.
All LED's flash momentarily each pass through self
test. Error is not displayed until START switch is
released.
TEST RESULT LED's flash test n each time that
test is completed. On error in test n, LED's continu-
ously display section number of failure. S.T.
FAILED LED is also lit.
Flashes 2 on TEST RESULT LED's.
Flashes 1 on TEST RESULT LED's.
TEST RESULT LED's flash test number each time
test is completed. On error in a test, LED's continu-
ously display failed test number. S.T. FAILED LED
is also lit.
Notes:
1. An error in test 17, 16, or 15 will cause the controller to hang (i.e., not respond to HP-IB commands). The only way to reset the
controller after a test 17 failure is to reset the disc drive, either by cycling the disc drive power switch or the RUN/STOP switch. In tests
16 and 15, activating the START switch also restarts self test.
2. In the service mode, with the START switch held in the on position, the controller will loop on the appropriate test (or entire self test)
until the first error is detected, when it will start over again. The START switch inhibits error halts except in test 17.
3. Always return the OP/SERVICE switch to the OP position to use the disc drive. Otherwise, the controller will not respond to HP-IB
commands.
A-41