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to energize the typebar solenoid, the typebar can be
removed or replaced. Then turn the typebar inser-
tion wheel until the notch on the typebar flag of the
39-, 47-, 52-, or 63-character typebar is aligned
proper ly to the decal. Be careful to a void damage to
the type bar.
When a typebar has been changed, press the printer
reset key before the start key to prevent a Sync-
Check indication.
Forms Thickness Adjustment
The platen-positioning knob (see Figure 20) can
adjust the platen toward or away from the typebar
to compensate for the number of carbon copies used.
The adjustment is made through a knob and detent
combination below the left end of the carriage. Con-
trol setting 3 is the standard position for the average
one-part form of regular-weight paper.
For increas-
ing thickness the knob should be turned counterclock-
wise.
The control provides sixteen positions. To
insert a new form, the control should be turned
fully counterclockwise, then readjusted before
printing is started.
Suggested platen settings are:
Form
Setting
#
I-part form, 0.002-0.005 inch thick
3
2-part form,
O.
006-0. 012 inch thick
4 or 5
4-part form, 0.014-0. 026 inch thick
6, 7, 8,
6-part form, 0.022-0.030 inch thick
Regular card stock, 0.007-0.015
thick
9,
or 10
8, 9,
10,
or 11
6
Typebar Selector Switch
This rotary switch (see Figure 19) should be set to
the position that corresponds with the typebar char-
acter set being used. Position 52 is used for both
the 47 and 52 character set, and position 13 is not
used by the 2780.
26
Figure 20. Printer Left-Hand Controls
COMPONENT SELECTION, BASIC TERMINAL
(CONTENTION)
When the mode switch is set to the REC (Receive)
position, a two-character sequence, ESC plus a
component-selection code controls selection of the
output unit (punch or pri1;lter). This sequence must
be the first two characters following the STX or US
character and must appear in the first record of a
transmission, as shown in the following example:
SSE
YTS
NXC
?
Text
U
S
E
Text T
B
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