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174
RIBBON FEED ROLLS
Service Check
The right and left feed rolls should be aligned with each
other \';'ithin 0.254 mm (0.010 inch)
II.
Adjustment
1.
Power off.
2.
Open the top cover.
3.
Adjust the feed· rolls as follows:
a. Loosen the screw
II
that holds the right fee,d
rolls.
b., Open the feed rolls by pushing the ,flat spring to
the right
II.
c. Position the right feed rolls so that they align
with the left rolls
II.
, d. Tighten the screw.
Removal and Replacement
1.
Power off and remove' the ribbon (177).
2.
Remove the right feed rolls as follows:
a. Remove the screw
II.
b. Hold the flat spring
II
to the right and turn the
feed rolls. toward the platen area to free
them from the· spring.
3.
Remove the left feed rolls as follows:
a. For installation, install the platen and adjust the
print head.
b. Remove the print head (160).
c. Remove the screw
II
from the left side of the
ribbon box.
d. If the right feed rolls are in place, hold the
~Iat
spring
II
to the right and turn the left feed rolls
toward the platen.
4.
To reinstall the feed. rolls, reverse this procedure.
Align the right feed rolls vertically to the left rolls
II·
1-54
175
RIBBON DRIVE GEARS
Removal and Replacement
1.
Power off.
2.
Separate ,the printer from power supply board A 1
,(115).
3.
Remove the· clips
III
and remove the gears from
the feed roll shafts.
.
4.
Remove the drive shaft
II
(172).
'5.
Remove the dip
IE
and remove the idler gear:
6.
Reinstall the gears by reversing this procedure.
Put a little IBM No. 23 grease on the gear shafts
and on the gear teeth.
176
RIBBON BOX AND COVER
Removal and Replacement
The ribbon box cover can be separated from the box at
the hinge.
1.
Power off.
2.
Separate the printer from power supply board A 1
and place the printer in the service position (115).
3.
Remove the ribbon drive assembly (170).
4.
Remove the following parts:
a. Ribbon feed rolls (174)
b. Ribbon drive shaft (172)
c. Ribbon Feed Roll Release knob
II
(it has a clip
on the bottom)
4.
Assemble the ribbon box and cover by reversing
this procedure.
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