IBM Selectric Maintenance Manual page 91

2. Black Shift Magnet - With the black shift magnet arma-
tureenergized and the red shift magnet armature de-en-
ergized, position the black shift magnet for a clearance
of .0lD" between the black and red shift armatures (Fig.
199).
rRed Shift
Armatur~
~==~JJ
(De-Energized)
Black Shift Magnet Red Shift Magnet
FIGURE 199. Magnet Positioning
NOTE: With the red shift armature energized and the
black shift armature de-energized, the black shift arma-
ture must overthrow the red shift armature by
.003"
to
.006"
(Fig.
200).
Assembly Bracket
.003"
to
.005"
Overthrow
Adj. Screws
o
0
(Energized)
Black Shift Armature (De-Energized)
FIGURE
200.
Black Shift Armature Overthrow
3. Magnet Adjustments (1 Magnet) (Fig. 201) - With the
red shift magnet armature energized, position the hinge
plate and armature stop so that the armature clears the
yoke (both inner and outer poles) by
.003"
to
.005".
't~03n
A/rmature
=t~03"
.005"
Mtg. Screw
Hinge Plate
Yoke
FIGURE 201. Magnet Adjustments (1 Magnet)
4.
Pivot Arm (Fig.
202) -
With the manual ribbon lift lever
in the black position, form the pivot arm extension (up
or down) so that the latch does not drag when moved from
the latched to the unlatched position.
NOTE: Position the pivot arm bracket so that the high-
est and lowest characters print equi distant from the top
and bottom of the red portion
o~
a black and red ribbon.
Pivot Arm
Cam Follower Latch
FIGURE
202.
Pivot Arm
5.
Right Hand Pulley (Fig.
203 & 204) -
With the red shift
armature energized, position the right hand pulley pivot
to obtain
.002"
to
.005"
clearance between the stud
and follower latch slot.
Pulley
Pivot
Loosen This Nut Before
Attempting Adjustment
Adjustable lock
Pivot Screw
.~
RH Ribbon Pulley
Bracket
FIGURE
203.
Right Hand Pulley
.002"
to
.005"
C».04--_
Follower Latch
Stud
Cam Follower Latch
FIGURE
204.
Cam Follower Latch
NOTE: The pulley nut must be loosened before adjust-
ing the pivot screw.
6. Red Shift Armature Backstop (Fig. 205 & 206) - With the
armature de-energized, position the red shift armature
backstop to obtain .002" to .005" clearance between the
stud and the follower latch slot.
2-58
Red Shift Armature
(De-Energized)
Armature Backstop
..---=~~~
FIGURE
205.
Red Shift Armature Backstop
.002"
to
.005"'--1--1 ... _-
Follower Latch Stud
Cam Follower
Latch
FIGURE
206.
Cam Follower Latch