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TABLE 3-4 (CONTINUED)
DIAGNOSTIC MODE OF OPERATION
DL
M4
M3
Ml
Test
Description of Test
X
-
X
-
lOlA
Monitor the write protect sensor. This test checks the
write protect sensor. The front panel L.E.D. should turn
on and off by moving a disk, which has the write protect
notch covered, in and out of the drive. The L.E.D. is on
when write protect is true.
X
-
X
X
ll/B
Alternate seek between Track 0 and Track 4 with spindle
motor on. This test is used in conjunction with a scope to
dynamically test the Track 0 sensor.
X
X
-
-
l2/C
Monitor the status of the lever position switch. This test
is used to check the lever position switch. The front
panel L.E.D. flashes on and off with the opening and
closing of the diskette lever position switch.
X
X
-
X
13/D
Alternate seek between Track 74 and Track 76 with spin-
dle motor on. By writing data on Track 75, this test
determines if the head movement over that track causes
any erasure. A time of 30 milliseconds is allowed for the
head to settle at the end of each seek.
X
X
X
-
14/E
Turn spindle motor off. This test turns off the spindle
motor.
X
X
X
X
15/F
Flash version number. This test outputs the firmware
version number to the front panel L.E.D.
Notes: X
=
Jumper In
=
Open
3-16
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