IBM Selectric Service Manual

Section 4. Service Index
No
Ves
No
Pawl Binds
Spring
Off Pawl,
Tab Lever Restricts Pawl
1.7
Worn Escapement Pawl 1.8
Ves
Intermediate Lever Loose or Broken
1 .5
No
Keylever Pawl Off or Adjust. 1.2
Spring Off Interposer or Wrong Spring 1 .11
tam Release Lever is Binding or Rusty. Adjust. 1.1
See
Output Mode
Ves
Figure 1.0 BACKSPACE
1.0
1.1
1.2
BACKSPACE
Backspace Adjustments
Wi th the interposer and cam latched I form the Re lease
Lug to obtain .035" - .045" clearance between the
Interposer Lug and the Release Lever Lug.
The
Keylever Pawl clears the interposer by .020" -
• 025".
Too Far
Intermediate Lever
I .5
Bellcrank Stud 1.4
Escapement Bracket 1.7
Binds 1.6
Latch 1.3
Worn Pawl SH 1.12
1.3
1.4
4-1
No
Check
Interposer Restoring 1.10
Interposer Latch Spring
Off Or Binding
See
SH 1.9
The latch to bai I clearance shou Id be:
a. .003" - .015" Space/Backspace.
b. .003" - .010" Carrier Return/Index.
c. .003" - .015" Tab or Wordmark.
Ves
Adjust the Intermediate Lever adjusting screw to ob-
tain .005" - .015" between the B/S Rack and B/S
Pawl
with all parts at rest. This adjustment is used to
position
the Backspace Rack at rest. It MUST NOT
be used t9 determine the throw of the backspace rack .

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