IBM Selectric Reference Manual

NOTE:
C
heck to insure that the shi ft lock can be latched with
the keyboard lock de-activated.
7. Keyboard Interposer Lock Assembly
a. Adjust the keyboard interposer lock assembly by
loosening the four mounting screws and moving the
assembly up or down for. 003" to .015" clearance
between the bottom of the interposer and the key-
board interposer lock assembly when the keyboard
interlock assembly is activated (Fig. 60).
Keyboard Interlock Asm.
FIGURE 60. Keyboard Interposer Lock Assembly
This adjustment insures that the interposer lock does
not
bind off on the selection interposers when the
keyboard lock solenoid is operated. It also pre-
vents the selection interposer from moving down
far
enough to tri p the cycle cI utch.
b. Adjust the keyboard interposer lock link so there is
.
010" to .020" clearance between the interposer
and the interposer lock assembly with everything
in the unlocked position (Fig. 61).
FIGURE 61. Keyboard Interposer Lock Link
This insures
that the interposers wi II not bind on the
interposer lock when operating the printer from the
keyboard.
8. Cycle Clutch Pawl Stop - Adjust the pawl stop mount-
ing bracket so that the cycle clutch pawl stop clears
the cycle clutch pawl by .010
11
to .020
11
with keyboard
locked. Best results are obtained on the high side of
the adjustment (Fig. 62).
9.
Pawl Stop Link - Adjust the pawl stop link so that there
is 1/3 to 1/2 overlap of the cycle clutch pawl stop
to the cycle clutch pawl with the keyboard lock mech-
anism in the lock position (Fig. 62).
10.
Cycle Clutch Pawl
FIGURE 62. Cycle Clutch Pawl Stop
Pawl Stop
Mounting
Bracket
Keyboard Mode Contacts - Form the N/C support so
that the O/P lifts the NjC contact by .002
11
to '000511
{Fig. 63).
1
0
1 • Form the N/O support so that the N/O contact clears
the O/P by .040" (Fig. 63) .
.
002" to .005" Rise
Contact Bracket
Support
N/C Contacts
o
o
~~~~~
L----~~~~3J .040" Air Gap
12.
N/O Contact
Support
F I GU RE 63. Mode Contact
Position the contact bracket for a clearance of .003"
to .007" between the operating strap and actuating
lever {Fig. 64) •
Operating Point
.003" to .007" I
~----o/~----.
Actuati ng Lever
FIGURE 64. Mode Contact Actuating Lever
SHIFT MECHANISM
1. Shift Cam Back-Up Roller - Adjust the back-up roller
eccentric left or right so that .001" to .004" of the cam
bearing extends beyond the cam (Fig. 65). The eccentric
should be kept in the bottom half of its orbit.
.001" to '~04"l
Adjust Back-Up
Roller Eccentric
FIGURE 65. Shift Cam Back-Up Roller Adjustment
2-16

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