TABLE 3-4 (CONTINUED)
DIAGNOSTIC MODE OF OPERATION
DL
M4
M3
Ml
Test
Description of Test
10/A
X
X
X
X
14/E
13/D
11/B
12/C
Monitor the write protect sensor. T his t e st c h e cks t h e
w rite 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 t h e d r i ve. The L.E.D. is on
when write protect is true.
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.
Monitor the status of the lever position switch. This test
i s used t o c h eck t h e l e v e r p o si t ion 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.
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 t r ack causes
any erasure. A time of 30 mi l l i seconds is allowed for the
head to settle
at the end of
each seek.
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 l e
X
motor.
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.
15/F
N otes : X
=
Jumper In
-
=
Open
3-16
