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2.2.3.3
CONTROL SECTION
The control section contains keys to control the
following functions:
(1)
LOCAL. A push-to-Iatch/push-to-release switch that
selects Local or Remote mode. In Local, the HyTerm
operates substantially the same as an electric type-
writer. In Remote, in addition to the typewriter
functions, it also transmits and receives data over the
communications link. Basic operating techniques are
essentially the same in either case, with only a few
additional
items requiring consideration
in
the
Remote mode. Throughout this section, when refer-
ence is made to data transmission and reception or to
the communications link, it is assumed that Remote
mode is in effect.
(2)
UC ONLY (Upper Case Only). A push-to-Iatch/push-
to-release switch. When latched down, it converts all
keyboard lower case alphabetic characters to upper
case letters for printing and transmission; all non-
alphabetic characters are unaffected. I ncoming char-
acters are unchanged. The OFF position inhibits this
feature.
(3)
BREAK. A momentary action switch that transmits a
Break signal to the communications link. This is
normally used to "get the attention" of the host
computer for various network functions. Depressing
this key also clears out any data that may be left in
the print buffer. (A Break is also transmitted auto-
matically, and the print buffer is cleared, whenever a
Paper Out, Printer Check, or Overrun condition
occurs.)
2.2.4
Printer Controls
Figure 2-5 illustrates the printer controls commonly
used by the operator. The numbers in the following list
correspond to the keyed items in the illustration.
(1)
Platen knobs. These allow the platen to be rotated
manually in order to insert paper and position it
properly. The right-hand
knob provides variable
platen action - when the knob is pushed in, it allows
the platen to roll freely in either direction. The
position of the writing line can be changed by using
this platen variable function.
Note that whenever the platen is turned by hand, the
form is moved out of synchronization with the
HyTerm electronics. To re-synchronize the two, the
form must be positioned for printing on the first line
(with the SCROLL switch off) and the SET TOF
switch must be operated.
2·7
(2)
Platen adjust lever. This lever moves the platen
forward or backward to compensate for different
form thicknesses (number of carbons). It should be
all the way forward for single copies, and all the way
rearward for an original and five carbon copies.
Intermediate positions provide for form thicknesses
between these two extremes. When printing on a
form of several copies and th is lever is moved toward
the rear, it may be necessary to increase the print
hammer intensity for optimum print quality. This is
done by changing the impression control switch (see
2.2.5).
(3)
Paper bail levers and paper bail. The paper bail holds
&
the paper against the platen. This is necessary for
(4)
optimum print quality and quietness. The bail must
be pulled forward, away from the platen, (by moving
one of the levers) when paper is being inserted. When
using a pin-feed platen or a tractor-feed mechanism,
the bail rollers do not apply full pressure on the
paper, but are held in the optimum position for
proper operation by the pin-feed paper clamps or the
tractor-feed mechanism.
(5)
Combination scale. This scale provides a visual indica-
tion of the print head position along the typing line.
It is marked for both 10 characters per inch and 12
characters per inch.
(6)
Access cover. This cover snaps off or raises easily to
provide access to the printer mechanism when it
becomes necessary to replace a ribbon cartridge or
change the printwheel. One of two different types of
covers may be found. The first, called the "long"
access cover, is a one-piece cover that is hinged at the
rear and swings up when raised. The second type,
called the "short" access cover, must be used with the
forms tractor and is provided on all current produc-
tion terminals. This cover is augmented by two plastic
"skirts" that snap into place over the ends of the
platen. To raise or remove the access cover, first
position the carriage to the far left (either with a
carriage return or by manually sliding the carriage to
the left when power is OF F). Lift up on the left front
corner of the access cover until it snaps free, then
raise or remove the entire cover. To replace the
"short" access cover,
insert the right side into
position first, then snap the left side into place.
(7)
Paper release lever. I n the forward position, this lever
releases tension on the paper, allowing it to be
repositioned or removed. The lever should be back
when printing on a friction-feed platen to provide
proper feeding of the paper. It should be forward
when printing on a pin-feed platen or when a
tractor-feed mechanism is used.
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