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Ribbon Drive
170
RIBBON DRIVE
Removal and Replacement
1.
2.
3.
4.
5.
6.
7.
Power off and remove the printer covers (110).
Remove the print head (160). Adjust the print
head during installation.
Separate the printer from power supply board A 1
and place the printer in the service position (115).
Remove the ribbon drive lines
II
(173).
Remove the screw from the inside of the ribbon
box
II.
Remove the screw from the left side of the ribbon
box beside the feed rolls
II.
Lift out the ribbon drive.
8.
To reinstall the assembly, reverse this procedure.
171
RIBBON DRIVE CLUTCHES
Removal and Replacement
1.
Separate the printer from power supply board A 1
and place the printer in the service position (115).
2.
Remove the ribbon drive lines
II
(173).
3.
4.
5.
6.
Remove the clip from the bottom of the ribbon
clutch shaft
II.
For installation, when the shaft is held, both
clutches should turn clockwise (when seen from
the clutch end of the shaft)
II
if you turn them.
Remove the clutches and washers
II.
To reinstall the clutches, reverse this procedure.
Put a little IBM No. 23 grease on the clutch end of
the shaft before installing the clutches.
1-52
172
RIBBON DRIVE SHAFT
Removal and Replacement
1.
Power off and remove the printer covers (110).
2.
Remove the ribbon (177).
3.
Remove the clip at the Ribbon Advance knob
II.
4.
Separate the printer from power supply board A 1
and place the printer in the service position (115).
5.
Remove the ribbon drive lines (173) and take the
drive belt off the motor pulley.
6.
7.
Remove the shaft
II
with the clutches
II.
Remove the remaining clip
II
and slide the
clutches
II
off the shaft.
8.
For installation, when the shaft is held, both
clutches should turn clockwise (when seen from
the clutch end of the shaft) if you turn them.
9.
To reinstall the shaft, reverse this procedure.
173
RIBBON DRIVE LINES
Removal and Replacement
1.
Separate the printer from power supply board A 1
and place the printer in the service position (115).
2.
Remove the lines
II
from the clutches
D
but
leave the springs attached to the tabs on the right
and left brackets.
3.
To reinstall, thread the lines so they are parallel to
each other and to the carrier main shaft. The line
crossovers must be as shown
II.
4.
Assemble power supply board A 1 to the printer
(115).
Note: An aid, when installing the upper line is to use a
small amount of adhesive tape to hold the loop around
the clutch while attaching the ends ·to the side frame.
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