Section II PRELIMINARY INSTALLATION PROCEDURE

TM 11-5815-206-12/ TO 31W4-2PGC1-61

chute at rear of the teletypewriter. (Not applicable

2-2. Checking Unpacked Equipment

to TT-537/G.)

A complete Teletypewriter Set AN/PGC-1, or

h. Wipe all shipping material particles from the

AN/PGC-3, and Teletypewriters TT-4(*)/TG, TT-

teletypewriter with a clean cloth.

335/TG, TT-537/G, or TT-698(*)/TG consists of

2-3. Siting

the items listed in paragraph 1-9 and 1-10, and

Appendix B as applicable. Check the equipment

Select an installation site that meets the following

received against the packing list. If a packing list

requirements:

was not received, check for the presence of all

a. Shelter. The teletypewriter must be operated

applicable items listed in paragraphs 1-9, 1-10, and

in a shelter in which the temperature is kept warm

appendix B. Remove the remaining shipping

e n o u g h to permit finger operation of the

teletypewriter keys. A tent or a canvas-covered

materials and check the teletypewriter (a through b

below). If the equipment has been damaged, or if

truck is adequate, but a heated building or closed

it is incomplete, refer to paragraph 1-3.

truck is preferable as an operating site. Shelter

a. Unfasten the eight spring-loaded latches that

requirements n o r m a l l y do not present any

hold the immersionproof cover to the teletypewriter

problems when the equipment is to be operated on"

base. Press the center of the pressure-equalizing

shipboard or in aircraft.

valve (fig. 1-11 ) to equalize the internal and ex-

b. Space. Each teletypewriter operating position

ternal pressure. Lift the cover from the base.

requires a floor space area of approximately 3 feet

b . Loosen the round knurled nuts and

by 5 feet.

disconnect the dust cover ground leads from the

TT-335 TG and TT-537 G are equipped with

front comers of the dust cover (fig. 1-7).

heaters which permit operation in extreme cold.

c. Push the platen knob (fig. 1-9) inward until it

Use of the TT-537 G normally does not include

is inside the dust cover.

operation of the keyboard-transmitter, therefore

d. For the TT-4A/TG or TT-698/TG, grasp the

finger operation temperature is not required.

rear corners of the dust cover, raise the rear of the

c. Power. The TT-4(*)TG requires a source of

dust cover to free it from the rear mounting posts,

105- to 125-volt dc or ac (50- or 60-Hz single-

and lift it straight upward. Release the motor

phase) for the teletypewriter motor. The TT-335

power cable connector from the dust cover of the

TG and TT-537 G require 105- to 125-volt, 396- to

TT-537/G (fig. 1-8). For all models, except the TT-

404-cps, single-phase alternating current for the

4A/TG or TT-698/TG, turn the cam-lock assembly

teletypewriter motor and for the amplifier circuits

on each side of the dust cover and lift the cover

of the TT-537 G. The TT-537 G may also be

straight upward.

operated from a 396- to 404-cps, three-phase. Y-

e. Pivot the front access door upward and

connected generator with the motor and electronics

remove the tuning fork from the brackets on the

powered from one phase and the heaters from the

inner side of the door. Remove the protective

second phase, if the phase-to-neutral voltage is

wrapping from the tuning fork, examine the fork

between 105 to 125 volts. The TT-537 G will

for damage, and replace it in its brackets.

operate on a nominal signal line voltage range of 6

(1) volts and 120.130 volts dc. The TT-

f. Remove the wooden blocks that have been

used to prevent damage to the equipment during

698(*)/TG requires a source of 105 to 125 volts ac

shipment. Check carefully to be sure that all

(50- or 60- Hz, single-phase) for the teletypewriter

blocks are removed.

motor and electronic modules.

g. Remove the tape from the following places:

d. Lighting. A d e q u a t e lighting must be

(1) Signal-bell clapper at rear right-hand

available for both day and night operation.

corner of teletypewriter.

e. Ground Connection. A suitable ground

(2) LTRS key lever and space bar on

connection point must be available to provide

keyboard.

adequate protective grounding, as described in

(3) Type basket above control panel.

paragraph 2-7b.

(4) Motor power cord beneath paper-feed

Section II

PRELIMINARY INSTALLATION PROCEDURE

2-4. Tools, Test Equipment, and Materials

a. Tool Equipment TE-50-B.

b. Multimeter TS-352/U, or equivalent.

The following tools, test equipments, and materials

c. Oil, lubricating, general purpose, NSN 9150-

are required for installation of the teletypewriter

00-223-4129.

set, but are not furnished as part of the set.

2-3