IBM Selectric Reference Manual

13.5 MAL-SE LECTIO N OR PARITY ERRORS
Mal-selection or parity errors may be caused by the
latch pushers contacting their latch extensions when
an unse lected pusher is against its armature. There
should be a minimum of .002" clearance (Fig. lA)
between the pusher and the latch extension when the
pusher is against its armature. To check this adiust-
ment, turn machine power off, trip the cyc Ie clutch,
and hand cyc Ie a few deg rees through a cyc Ie. The
pusher cam follower shou Id be on the low dwell of the
pusher cam.
Figure 13.1
Machine Cycled To
Low Dwell Of Cam
.002"
PRINT AREA IN OUTPUT MODE
C'"''''OCk Ope"
Driver or Wiring
or Reed Relay
No
No
Magnet Coil Bad
Armature Binding
Knock
Off 14.3
Failure
toCycle
No
Yes
Yes
EXTRA
Cycles
See 11.0, 14.8
14.3, 14.2
Yes
Magnet Assembly Adj. 14.4
Latch Lever Bite 14.9
Cycle CI. Adj.
Latch Lever Mounting 14.11
Bracket
Trip Link
Adj. 14.10 •
• Figure 14.0
PRINT MAGNETS
14.0 Prin"t Magnets
14.1 The pusher to latch clearance must be .035" for all
pushers except the Check Latch which is .020" -
.
025".
14.2 The armatures must not bind when depressed manually.
Check for oil, dirt, residual magnetism, and bent
armatures.
5-19
When operating the armatures manually, be careful
not to bend or deform them.
14.3 The Cycle Trip Bail Knockoff Extensions must clear
the knockoff eccentri cs by .003" - . 008" when an
armature is manua Ily attracted .
14.4 A clearance of .001" - .010" must be maintained on
the horizontal and vertical latching surfaces of the
armatures.

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