Drive Motor Assembly - Radio Shack TRS-80 Service Manual

3.8
DRIVE
MOTOR
ASSEMBLY
(Figure
3-5A)
REFERENCE
ASSEMBLY
15A
15B
1
2
3
4
5
6
7
8
9
10
11
12
13
PART
NUMBER
63780152-6001
63780152-6002
63780152-5001
63780152-5002
535097001
-2001
535493001-2001
028050242-2001
535141001-2001
525745001-2001
535560001-2001
535544001-2001
028040242-2001
535539001-2001
535547001-2001
525743001-2001
DESCRIPTION
QTY.
Kit,
Drive
Motor Assembly, 60Hz
1
NOTE:
this
kit
includes items
1
and 3 through
13.
Kit,
Drive Motor Assembly, 50Hz
1
NOTE:
This
kit
includes items
2 through
13.
Drive
Motor Assembly, 60Hz
1
Drive
Motor Assembly, 50Hz
1
Fan Blade/Main Motor
1
Bolt,
M5
x
10
mm
Lg.,
Hex
Hd. Slotted
4
Washer,
Split
Lock,
M5
4
Drive Pulley Assembly
1
Set-Screw,
M4
x
6
mm
Lg.
2
Drive Pulley
Bearing Holder
Unit 2
Bolt,
M4
x
8
mm
Lg.,
Hex, Hd. Slotted 2
Washer,
Split Lock,
M4
2
Nut, Hex,
M4
2
Line Feed
Clutch Drive
Gear
1
Set-screw,
M4
x
4
mm
Lg.
2
A.
FUNCTION
The
drive
motor assembly moves
the carriage
in
the
left
or right direction
and
transmits
power
to
the platen
drive
assembly.
B.
REMOVAL/REPLACEMENT PROCEDURE
TOOLS
REQUIRED:
M4
Hex
Key, Phillips
Screwdriver
and
M5
Nut
Driver.
1.
Loosen
tension
on main
drive belt
by turning two
adjusting
screws on
idler pulley
assembly counterclockwise.
2.
Remove
the
two screws and
flatwashers mounting
the
motor
fan
cover.
3.
Disconnect two-pin connector P007
of the drive
motor assembly from connector J007.
4.
Loosen
the set-screws
(7,
13)
mounting the
line
feed
clutch drive gear
(12),
drive pulley
bearing holder
unit
(8)
and
drive pulley
assembly
(6)
to
the
drive
motor
shaft.
5.
Remove
four
bolts
(4)
and lockwashers supporting the
drive
motor assembly
(1,
2)
and
slide the shaft
and motor
out
of
the
printer.
Figure 3-5A.
KIT,
DRIVE
MOTOR
ASSEMBLY,
REMOVAL/REPLACEMENT
3-12