Radio Shack TRS-80 Manual page 7

Operating with Tractor Feed
System
The
printer will
accept
any standard tractor-feed
paper
from mailing
label strips
up
to
15"
(standard
132-
character
paper).
Paper can be
single
or multi-part,
up
to 3
parts total.
Refer to
Fig. 4, 6,
and
7 as
you
follow
these instructions
1
Remove
plastic
cover.
2.
Move penetration control lever fully
backward (away from platen).
3.
Pull release lever
toward the front.
4.
Be
sure to install
paper tray
if
not already
in
place.
Refer to Fig.
8 for
installation
method.
5 Release
paper
bail
from
platen
by
tilting
it
backward.
6*
Pass
the paper
through
center part
of
paper tray
and then through paper insertion
opening
at
upper
center of printer.
Return release lever.
Turn paper feed
knob
until
paper forward
end
appears be-
tween
platen
and paper
scale.
7.
Pull release lever
toward the front.
Note:
There
is
another paper-entry slot in
the center
bottom of
the printer.
Use this slot
if
your
Printer
stand allows paper
to enter directly into
the
bottom of
the
Printer.
Th.s
is
convenient
for loading
paper
directly
out of
the
paper box.
*
Release the paper
bail
from platen. Insert
paper through
bottom paper insertion
opening
and push the paper
up
until
it
appears
between the
platen
and paper
scale.
8.
Pull
paper out
about 6"
(15 cm).
9.
Raise tractor
paper holders
and
lay
the paper over feed sprockets. Align
paper holes
with sprockets
and snap paper holders
back
on to the sprockets.
Note-
1
If
paper sprocket holes
do not
fit
properly over the sprockets, loosen the screws
on
sprocket unit
and
shift
the
unit for
proper
position
and retighten set
screws.
If
paper
is
stretched
too
tightly
or
is
loose
and
wrinkled,
paper
may
not be
fed properly.
2.
When
tractor feed
is
used,
always have
release lever
pulled back.
10.
Adjust Penetration Control for
optimum print quality as
follows:
Single-Part
Forms
.
Move
Penetration Control completely to the
platen for
maximum
print
head
penetrat.on.
Use
this
setting for
all
single-part
forms.
Multi-Part
Forms
,
Move Penetration Control lever
toward
the platen until
paper
smudges
when
carriage
is
shitted
manually back and
forth across the paper.
Then
return
the lever slightly
backward
until
the paper
does not
smudge when
carriage
is
shifted; leave lever at
the
closest
locking setting.
Note-
Do not to allow the printed
paper to
pile
on top
of the
unprinted paper stock,
and take
care
about
the paper not to
be
led
on the
bent route
(it
could cause
improper paper feed).