Teletype 33 Adjustments

TELETYPE CORPORATION
Skokie, Illinois, U. S. A.
SECTION 574-121-700T C
Issue 4, February 1971
33 KEYBOARD
ADJUSTMENTS
1.
2.
1.
CONTENTS
PAGE
GENERAL. . . . . . . . . . . . . . . . . . . 1
BASIC UNIT . . . . . . . • . . . . . . . . . 5
BREAK keylever spring. . . . . . • . • • 12
Contact block spring .•..•.. ; • • • • 10
Contact wires • . . . . • . . . . . . • . . . 6
Contact wire spring . • . . . . . . . . . . 10
CTRL contact wire . . . . . . . . . . • . . 8, 9
CTRL keylever spring. . . . . . . . . . . 12
Distributor trip linkage . • ..•..•• 20,-2.l
HERE IS keylever spring .......•.
---12, )
Keylever spring. . . • . . . . . . . . . . . 11
Keylever springs {SPACE, BLOCK,
hyphen, or O keytops). . . . . . . . . . . 13
Latchlever spring. . . . . . . . . . • . . . 19
Left shift contact wire. . . . . . . . . . . 7
Nonrepeat lever spring . . . . . • . . . . 17
REPT keylever spring. . . . . . . . . • . 12
Reset bail spring . . . . . . . . . . . . . . 14
Shift codebar spring . . . . . . • • . . • • 16
Spacebar spring. • . . . . . . . • • • . . . 11
Universal lever spring • . • . . • . . . . 18
·universal link . • . . • . . • • . . • • . . . 5
Universal link spring . • • . . . • . . . . 15
GENERAL
1.
01 This section provides adjustment infor-
mation for 33 keyboards which are me-
chanically reset by an H-plate and the distributor
trip linkage shown in 2. 16 and 2.17. It is reissued
to provide specific references to related sections
I
and to make a few minor changes. Marginal
arrows indicate the changes.
_J
Note: Adjustment information for solenoid
reset keyboards is found in Section 574-
121-703TC.
1. 02 In the adjustments covered in this section,
location of clearances, position of parts,
and point and angle of scale applications are
illustrated by line drawings. Requirement s and
procedures are set forth in the several te xt s t hat
accompany the line drawings. Tools neces s a ry to
maintain 33 Teletypewriter Sets are shown in
Maintenance Tools Section 570-005-800 TC.
1. 03 The sequence in which the adjus tm ents
appear is that which should be follo wed
when a complete readjustment of the keyboa rd is
undertaken. No single adjustment shou ld be
undertaken without first completely underst and-
ing the procedure and knowing the requireme nt s .
Therefore, reada procedure all theway thr ough
before making an adjustment or checking a spri ng
tension.
Note: Disconnect the keyboard fro m any
voltage source prior to inspection , m in or
repair, extensive maintenance, or a comp l et e
readjustment.
1. 04
References to left; right, front, r ea r,
etc consider the keyboard to be viewe d
from a position where the spacebar {Figure 3)
faces up and the contact mechanism is locate d
to the viewer's right.
1. 05 When a procedure calls for using p ry
points or slots to make an adjustme nt ,
place a screwdriver between the poin t s or in
the slots and pry parts in the proper di r ec ti on.
1. 06
When the keyboard is removed from the
subbase to facilitate the making of an
adjustment and subsequently replaced, rech ec k
any adjustments that may have bee n a ffe cted.
Also, if parts are removed from the key boa rd to
facilitate the making of an adjustment , be su re
that they are subsequently replaced. Rech eck
any adjustment that may have been affect ed by
the removal of parts.
1. 07 Related adjustments are listed with some
of the adjustmenttexts and are p r im arily
intended to aid in troubleshooting the equip ment.
As an example, suppose that in searching for a
trouble it is discovered that Part (2) of CONTA CT
WIRES adjustment does not meet its requi re-
ment. Under Related Adjustment it is indi cated
that Part (2) of this adjustment is affected by
Part (1). Check Part (1) to see if it is the basic
©
1964 and 1967 by Teletype Corp ora tion
All rights reser ved
Printed in U.S . A.
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