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DL
M3
M4
X
X
X
X
=
Jumper In
N otes:
X
=
Open
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TABLE 3-4 (CONTINUED)
DIAGNOSTIC MODE OF OPERATION
Ml
Test
Description of Test
10/A
Monitor the write protect sensor. T his test c hecks t h e
write protect sensor. The front panel L.E.D. should tur n
on and off by moving a disk, which has the write protect
notch covered, in and out of th e d r i ve. The L.E.D. is on
when write protect is true.
X
11/B
Alternate seek between Track 0 and Track 4 with spindle
motor on. This test is used in conjunction with a scope to
d~namicall~ test the Track 0 sensor.
12/C
Monitor the status of the lever position switch. This test
i s used t o c h eck t h e l e ver p o si tion s w i t ch . Th e f r o n t
p anel L .E.D. fl a shes on an d of f w i t h t h e o p ening a n d
closing of the diskette lever position switch.
13/D
Alternate seek between Track 74 and Track 76 with spin-
dle motor on. By w r i t i n g d a t a o n T r a c k 7 5 , t h i s t e s t
determines if the head movement over that tr ack causes
any erasure. A time of 30 mil l i seconds is allowed for the
head to settle at the end of each seek.
14/E
Turn spindle motor o ff. T h is t e st t u r n s o ff t h e s p i n d le
motor.
15/F
Flash version number. T his t e st o u t p u ts t h e f i r m w a r e
version number to the front panel L.E.D.
3-16
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