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6.6.8 WRITE PROTECT ASSEMBLY ADJUSTMENT
(Where Applicable)
This adjustment will be required whenever the unit is dis-assembled, or a different
style diskette is utilized in the unit.
a. With a Write Protected diskette installed in the unit (Write Protect slot uncovered),
monitor V30 pin 14/R82-East for the WRITE PROTECT signal. A continuous logically
high signal will be present whenever the Write Protect assembly is properly adjusted.
A logically low signal will appear if not properly adjusted. .
b. To adjust, loosen the two hex-head screws holding the sensor mount in place. With
the front panel door open, push down on the disk load arm (Figure 6-9 ) to insure
that the disk is in the loaded position (Figure 6-10). At the same time, grasp the
end of the envelope and move from side-to-side, and forward and backward while
observing the WRITE PROTECT signal at V30 pin 14/R82-East. Adjust the mount
until the WRITE PROTECT signal is present for any position of the envelope.
c. Tighten the mount screws, and re-check to verify signal under all conditions of
envelope position.
6.6.9 TRACK '00' SWITCH ADJUSTMEN'T
Perform the procedure given below whenever the Track 00 switch has been re-
placed, or the device fails to give current Track 00 indication, or if the head
has been realigned.
a.
Step the Read/Write head out to Track 01.
b.
Place a 0.010 (0.254 mm) feeler gauge between the carriage assembly and
Track 00 switch.
c. . Verify that the Track 00 switch 'closes by qbserving a }ow level at terminal
J3-2 on the Component Board Assembly.
d.
If the low level does not occur, loosen the Track 00 switch-bracket mount
screw and rotate the switch bracket forward until the low level occurs.
e.
Place a 0.005 (0.127 mm) feeler gauge between the carriage assembly and
Track 00 switch after removing the 0.010 (0.254 mm) feeler gauge.
f.
Verify that the
Tr~ck
00 switch remains open by observing
a
high level at
terminal J3-2 on the Component Board Assembly.
g.
If the high level does not occur, loosen the Track 00 switch-bracket mount
screw and. rotate the switch bracket backward until the high level occurs.
h.
Repeat "b" through "g".
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-y
c
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