IBM Selectric Service Manual

NOTE: To place the carrier in the next to last space,
proceed as follows:
a. Space to the right until the carrier pointer lines
up with the mark on the RH margin set lever.
b. Backspace one space.
3. As the carrier moves from the next to last to last space,
check for the following conditions (Fig. 185).
a. The contact transfer must be complete (and without
bounce) within one
space.
b. Nlc contact must break.
c. alp must lift the Nlo contact sufficiently to en-
sure rei iable make.
Bell Ringer Bail
Contact Actuator
Slight Rise
FIGURE 185. Last Column Contact
Last Column Contact (Fig. 186)
1. With the carrier in the next to last space, the contact
actuator arm shall be adjusted to give .010" to .020"
clearance between the switch wire and the actuator arm
with
the switch at its re-transfer point.
2. The actuator arm shall be adjusted to give. 120" to
.150" left to right clearance between the actuator arm
and the switch wire support.
3. The contact backup spring shall be so adjusted that the
actuator arm wi II contact the backup spring .250" to
.312" before it contacts the switch wire.
Last Column Contact (Late) Fig. 186. I) - With carrier in the
last column, the actuator screw shall be adjusted to obtain the
following:
I.
2.
Transfer the switch and have a .010"minimum overthrow
when escaping
from the last column and itwill re-trans-
fer with a backspace operation.
I>rovide a .005" minimum clearance between the actua-'
tor screw and the switch plunger, with carrier in last
column.
Pressure--- ...... ~
,..-~
/.120" to • ISO" "
\
}
I
FIGURE 186. Last Column Contact
Bell Ringer Bail
FIGURE 186.1. Last Column Contact (Late)

IBM Selectric Specifications

General

Type	Electric typewriter
Introduced	1961
Keyboard Layout	QWERTY
Carriage Return	Electric
Manufacturer	IBM
Printing Technology	Typeball (golf ball)
Power Source	AC Power
Power Supply	120V AC