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Line Current Adjustment (TT-537/G)
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TM-11-5815-206-12 Teletypewriter Sets AN/PGC-1 AND AN/PGC-3 and Teletypewriters TT-4A/TG TT-4B/TG TT-4C/TG TT-335/TG TT-537/G TT-698/TG Manual
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Figure 3-1.-Control panel.
TM
11-5815-206-12/
TO31W4-2PGC1-61
CHAPTER 3
OPERATION
Section I. CONTROLS AND INDICATORS
Function
Control
3-1. Controls
one space to the right. When held
a. Keyboard Controls (fig. 2-5).
down, causes type-bar carnage to
Function
Control
continue moving to the right until
FIGS  key.  . . . .When pressed,
platens
of
all
right margin is reached.
in the circuit are
teletypewriters
Turns motor on and off for initial
MOTOR switch
moved to figures-shift position for
starting and complete shut down of
typing of upper case symbols or
teletypewriter.
p e r f o r m a n c e of  m e c h a n i c a l
W bile pressed (half-duplex operation
B R E A K switch
operations indicated above letters
only (para 2-9) opens signal circuit
on alphabet keys.
to interrupt transmission from
other teletypewriters. Also restarts
When pressed, after use of FIGS key,
LTRS key
platens of all teletypewriters in the
motors when motors were stopped
circuit are moved to letters-shift
by depression of STOP key.
position for typing of letters.
When clamped in rearward position,
paper of  all
prevents  transmission  from
When pressed,
LINE FEED key
keyboard transmitter. Transmission
teletypewriters in the circuit is
possible when clamped in forward
advanced 1- or 2-line spaces on
platen. Adjustable for single or
position.
double line feed.
b. Control Panel Controls (fig. 3-1).
When pressed, type-bar carriages
CAR. RET. key
Function
Control
(fig. 1 -9) of all teletypewriters in
INCREASE
LINE
the signal circuit are moved to left
a
knob
margin of paper.
Used to adjust signal line current,
Turn clockwise to increase current.
TT-4(*)/TG,
When pressed while platen is in
BELL key
Turn counterclockwise to decrease
figures-shift position, signal bell is
TT-335/TG and
current.
r u n g t o s i g n a l teletypewriter
TT-537/TG)
operators.
A R M A T U R E dial  Used to adjust tension of selector-
magnet armature spring.
STOP key (Not applicable When pressed while Platen is in
figures-shift position, stops motors
ARMATURE dial lock Used to lock ARMATURE dial at
to TT-698(*)/TG)
selected dial position. Turn clock-
of all interconnected teletypewriters
wise to unlock dial.
that are equipped with a motor-stop
feature.
Used to adjust receiving mechanism
RANGE dial
When platen  is in letters-shift
for best performance.
Alphabet keys
position, pressing of each alphabet
RANGE dial lock
Used to lock RANGE dial at selected
key causes printing of letter shown
position. Turn clockwise to lock;
on keytop. When platen is i n
counterclockwise to unlock dial.
figures-shift position, pressing of
Used to switch illuminating lamp on
LIGHT switch
each alphabet key causes printing
or off.
(TT-4(*)/TG)
of symbol illustrated on key stop,
LIGHT-HEATER
ringing of signal bell (S key), or
switch
Used to switch illumination lamp or
s t o p p i n g of motor (H key).
lamp and heaters on and off.
(TT-335/TG and
When pressed, causes transmission of
Blank key
TT-537/G)
special. purpose blank code group.
a
On TT-698(*)/TG, used to adjust selector magnet current to
When pressed and instantly released,
Space bar
optimum value.
causes type-bar carriage to move
3-1

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