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3.2.21 Stepper Motor and Bracket
Removal and Replacement
1.
2.
Turn power off at the operator control
panel.
Remove the 33FD from the machine
(3.2.5).
3.
Remove the five leads from the connector.
4.
5.
6.
Remove two screws
a
CAUTION
Make sure pins are in slots of the leadscrew
wheel when replacing the stepper motor
to avoid breaking parts.
To replace, reverse above procedure and
do stepper motor adjustment.
Install the 33FD in the machine.
Adjustment
1.
Turn power off at the operator control
panel.
2.
Remove the 33FD from the machine
(3.2.5).
3.
Loosen the two screws
III .
4.
5.
Move stepper motor away from leadscrew.
Loosen clamping screw
fl
and move lead-
screw wheel up until it rotates freely.
6.
7.
Position wheel as shown in
m .
Pullieadscrew wheel down until pins on
stepper motor wheel fit into notches on
the leadscrew wheel
m .
8.
Slide the stepper motor wheel toward the
leadscrew until pins contact notches. No
clearance is allowed.
9.
Tighten the two stepper motor mounting
screws
IJ .
10.
Move the leadscrew wheel up until it
rotates freely.
11.
Rotate the leadscrew wheel and slide it
down on the drive pins in the position
shown below.
Note location of
notches and tabs
12.
Do head adjustment (3.2.17).
13.
Install the 33FD in the machine.
33FD Diskette Drive
3-21
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