Pinch Roller - Radio Shack TRS-80 Service Manual

3.11
PINCH
ROLLER ASSEMBLY
(26-1150-
Figure 3-8A)
REFERENCE
ASSEMBLY
PART
NUMBER
DESCRIPTION
18
535220001-6001
Kit,
Pinch
Roller
Assembly
Note: This
kit
includes items
1
through
1
1
1
525488001-5001
Paper Pan Assembly
2
535129001-5001
Pinch
Roller
Assembly
3
535286000-2001
Paper
Roll
Center Shaft
4
081022170-2001
O-Ring
5
535008001
-2001 Screw,
M4
x 8
mm
Lg.,
Pan
Hd. Phillips
6
028040242-2001
Washer,
Split
Lock,
M4
7
535009001-2001
Washer,
Flat,
M4
8
535119001-2001
Friction
Feed
Pinch Cover
9
535581001-2001 Sub-Frame
10 535068001 -2070
Cover
Lid,
Right
11
535067001
-2070 Cover
Lid,
Left
QTY.
1
1
1
1
2
3
3
A.
FUNCTION
The
pinch
roller
assembly
is
the standard paper
drive unit
in
the
printer.
Paper
movement
is
accomplished by pinching
the paper
between
the platen
assembly and
rollers
on the paper pan assembly and
as the platen
rotates,
paper
is
moved.
Mounted
to
the
left
frame
of
the pinch
roller
assembly
is
the paper
empty
switch.
B.
REMOVAL/REPLACEMENT PROCEDURE
TOOLS
REQUIRED:
Spring Hook,
Snap
Ring
Tool, Phillips
Head
Screwdriver
1.
Remove
the
column
scale/tear bar
assembly
per
paragraph
3.1
2.
B.
2.
Remove
the platen
assembly
per
paragraph
3.10.B.
3.
Remove
the three screws
(5)
lockwashers
(6)
and flatwashers
(7)
and
lift
the pinch
roller
assembly from the
printer.
C.
ADJUSTMENTS
1.
No
adjustments are required on the pinch
roller
assembly.
OPERATOR'S
ADJUSTMENT
2.
Refer
to
the
OPERATOR'S
MANUAL
for
loading
of
paper
into
the pinch
roller
assembly.
D.
PREVENTIVE MAINTENANCE
1.
No maintenance
is
required
on
the pinch
roller
assembly.
3-17