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S225-3357-3
FES: SS234069
Upper Front
Guide- Rail
I I
5. Adjust the armature retainer squarely for 0.035-inch to
4.12.1.1 Bail Contacts
0.037-inch air gap between armature and
with
With bail contact assemblies out of the machine, form each
magnet deenergized. Armature must
drag
On
the
contact strap to require a pressure of 9 to 11 grams to close
side of the retainer.
points (measure at contact point). Position the contact
6. Attract the armature and position the magnet bracket so
plates for contact air gap of 0.015 inch to 0.025 inch with
that the armature interposer block clears the side of the
all latch assemblies restored (Figure 4-53).
print arm by 0.004 inch to 0.010 inch (C, Figure 449).
Permutation Bar
7. When not attracted, the armature interposer block must
clear both the print arm and suppression arm by 0.001
inch to 0.010 inch at 132 degrees on the index (D,
Figure 4-53. Keyboard
Adjustment
CAUTION
When installing new assemblies, excessive heat (10-15
seconds) applied with soldering iron loosens contact
29
FEMM
(11/74)
4-37
Figure 4-49).
points.
4.12.1.2 Latch Contacts
4.12 KEYBOARD
Form the operating strap to require 18gram to 24gram
pressure to close contacts. Measure at contact pad. Pivot
Remove the keyboard from the keyboard well by rotating
contact assembly mounting bar to obtain 0.015-inch to
the keyboard clockwise. Lift keyboard out
keyb0ard
0.025-inch contact air gap across the unit. Stationary
well.
contacts may be formed for individual air gap.
4.12.1.3 Restoring Bail Contacts
4.1 2.1 Contact Adjustments
Form the operating strap to require 48gram to 52gram
Keyboard contacts should be inspected for air gap, tension,
pressure to open the contacts. Position the contact bracket
and contact rise. Check contact surfaces for nodes and pits
for 0.002-inch minimum to 0.010-inch maximum clearance
due to burning. Insufficient air gap of latch contacts can
between movable strap and operating insulator disk on
cause false error indications. Note the condition of these
restoring bail; it is very important to have clearance
contacts, particularly if the keyboard has been jarred or
between the contact strap and the disk. When all restoring
dropped.
magnet adjustments are made correctly, restoring bail
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