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4.2.35 Ribbon Tracking
(50, 100, and 154 Ipm)
4.2.35.1 For Ribbon Shields Without Guides
Note:
The ribbon guide
iii
is actually a slot cut
in the plastic part of the ribbon shield.
Service Check
1.
With power off, turn the right type belt pul-
ley and verify that the ribbon
m
tracks even
with the top of the platten
m .
2.
If the ribbon shield has metal strip(s), the
ribbon should track between the plastic and
metal strip(s) of the ribbon shield.
If the ribbon shield does not have metal
strip(s), the ribbon should track between
the plastic strip and the type belt.
Adjustment
1 .
I nsert paper that is wider than the platen.
2.
With power off, turn the right type belt pul-
ley and observe the space between the top
of the platen and the top of the holes in the
type belt. The ribbon should track even
with the top of the platen
II .
Note:
If the machine has a bracket as shown
at
II '
do step 3 only. If the machine has a
screw and locknut as shown at
m '
do step
4 only.
3.
Adjust by loosening screws
II
and move the
bracket toward the platen to raise, or away
from the platen to lower the ribbon. Adjust
both sides evenly and tighten the screws.
4.
Loosen locknut
m
and turn screw
m
clock-
wise to lower the ribbon or counterclockwise
to raise the ribbon. Tighten the locknut.
4.2.35.2 For Ribbon Shields With Guides
Service Check
1.
With power off and the print unit closed,
turn the right type belt pulley and verify that
the ribbon tracks slightly below the guides
iii
in the ribbon shield (even' with the top
of the platen);
2.
3.
Open the print unit. The ribbon should not
stay under the guides on the ribbon shield,
but should move forward with the print unit.
Close the print unit. The ribbon should be
located under the guides
III
on the ribbon
shield
E1 .
4-52
TNL: SN31-0487 to SY31-0373-4 (25 Nov 77)
Adjustment
, 1.
Insert paper that is wider than the platen.
2.
Adjust by loosening screws
II
and move the
bracket toward the platen to raise, or
away from the platen to
lo~er
the ribbon.
Adjust both sides evenly and tighten the
screws.
II
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