Teletype 33 Adjustments

TELETYPE CORPORATION
Skokie, Illinois, U.S. Ao
~t:CTION 574-12 5-700TC
Issue 3, July, 1967
33 TAPE PUNCH
ADJUSTMENTS
CONTENTS PAGE
1. GENERAL . ................. .
1
2. BASIC UNIT • • • • • • • • • • • • . • • • •
5
Backspace lever spring. • • • • • • • • • 17
Chad chute extension. . . . • • • • • • • • 13
Codebar extension springs. • . • • . • • 14
Control detent lever spring • • • • • • • 18
Control pushbuttons . . . • . • . . • . • . 18
Detent lever spring. . . . . . . . • • . • • 16
Drive link spring . • . • • . • . • . • • • • 19
Feed pawl spring . . . • . • • • • • • . • • 16
Feed wheel ratchet and pawl - final . 11
Fe~d wheel ratchet and pawl -
preliminary. . . . . . • . . • . • • • • . • • 6
Pawl and lever springs . • • • • . • . • • 15
Pawl upstop assembly - final • • . • • 10
Pawl upstop assembly -
preliminary. • . • . . . . • • . . . . • • • • 5
Punch block assembly • • • • • • • • • . • 19
Punch penetration. • . . . . . . • • • • • • 9
Sensing lever springs • • • • . . • • . . • 14
Stripper bail spring . • • • . • • . • . • . 15
Stripper bail upstop . . . . . . . . . . . • 7
Tape bias spring . . • • • • • • • • • • • . 13
Tape guide compression spring. • • • • 18
Tape guide tension spring • • • • • . • • 17
Tape nudger . . . . . . . . • • . . . • . . . 5
Tape punch drive . . . . . . . . . . . . • . 8
Ten characters per inch • • • . . • • . . 12
3. VARIATIONS TO THE BASIC UNIT. • 20
Automatic Control Mechanisms
Automatic ON . • . . • • • • • • • . • • . . 27
Automatic punch interlock sp,ring • • . 28
Control bail assembly • • • . • . . . . . . 20
Control bail assembly spring . • . . • • 26
Feed wheel ratchet and pawl gap. . • . 22
Latch bail gap . . • . . . . • • . . . . • . • 24
Latch bail spring . . . • • • • • • • • • • • 22
CONTENTS
PAGE
Lever overtravel • • • • • • • . . . . . . . 21
LOCK ON . . . . . . . , . . . . . . . . . . . 26
ONmechanism return spring . . . . . .
28
Sensing lever and bail gap • • • • . • • .
23
Visual ON OFF indicator. . . . . . . . .
2 5
Miscelianeous
Folded tape guide. • . • • . • • • . . . . .
29
1.
GENERAL
1. 01 This section provides adjustment and
maintenance information for the
33
tape
punch. It is reissued to provide exclusive cov-
erage of the 33 tape punch and to update the
section. Since this is a general revision, mar-
ginal arrows ordinarily used to indicate changes
and additions are omitted.
1. 02
Figure 1 shows the tape punch area where
the punch adjustments and spring tension
checks are made.
1. 03
In the adjustments covered in this sec-
tion, location of clearances, position of
parts, and point and angle of scale applications
are illustrated by line drawings. Requirements
and procedures are set forth in the several texts
that accompany the line drawings. Required
tools are included in TP185830 Maintenance Tool
~it and are listed in Section 570-005-800.
1. 04 The sequence in which the adjustments
appear should be followed when a com-
plete readjustment of the tape punch is under-
taken. No adjustment should be undertaken
without completely understanding the procedure
and the requirements. Read a procedure all the
way through before making an adjustment or
checking a spring tension.
©
1964 and 1965 by Teletype Corporation
All rights reserved
Printed in U. S. A.
Page 1