Ribbon Cartridge; Cartridge Assembly - Radio Shack TRS-80 Service Manual

3.6
RIBBON
CARTRIDGE ASSEMBLY
(Figure 3-3B)
REFERENCE
ASSEMBLY
13
1
2
3
4
A.
FUNCTION
PART
NUMBER
63700289-6001
53502001-5001
37740005-3001
535482001-2001
028040242-2001
DESCRIPTION
Kit,
Ribbon
Cartridge
Assembly
Note: This
kit
includes items
1
through
4.
Ribbon
Cartridge
Assembly
Ribbon, Black
Screw,
M4
x
10
mm
Lg.
Pan
Hd. Phillips
Washer,
Split Lock,
M4
QTY.
1
1
1
2
2
The
ribbon cartridge assembly mounts
to
the carriage
and
contains the
print ribbon.
The
ribbon
is
advanced during the
forward and
reverse
movement
of
the carriage by the ribbon
drive
shaft.
The
ribbon
drive shaft rotates
clockwise feeding
the
mobius
loop ribbon out
of
the
back
of
the
cartridge,
in
the
front of the
print
head, and back
into
the
front of
the
cartridge.
Movement
of
the ribbon
drive shaft
is
the
result of
two one-way
slip
clutches,
one
for
forward
movement
and
one
for
reverse
movement.
B.
REMOVAL/REPLACEMENT PROCEDURE
TOOLS
REQUIRED:
Phillips
Head
Screwdriver
1.
Remove
the
print
ribbon
(2)
from the
print
head
ribbon guides.
2.
Remove
two screws
(3)
and lockwashers
(4)
and
lift
cartridge
(1)
from
printer.
C.
ADJUSTMENTS
OPERATOR'S ADJUSTMENT
1.
Refer
to
the
OPERATOR'S
MANUAL
for
removal/replacement and adjustment
of print ribbon.
D.
PREVENTIVE MAINTENANCE
1.
Manually move
the carriage
assembly and
verify
proper ribbon
tracking.
Check
ribbon
rollers for
proper meshing.
Figure
3-3B.
KIT.
RIBBON CARTRIDGE ASSEMBLY
3-9