Introduction; Printer Subassemblies; Cover Assemblies; Print Head Assembly - Radio Shack TRS-80 Service Manual

3.1
INTRODUCTION
This section describes
the function, removal/replacement, adjustment and
preventive
maintenance procedures
of the printer
assemblies
in
the Line Printers. This section
is
aimed
at
subassembly
level.
The
section
is
organized
as
follows:
Subsection: 3.2 Printer
Subassemblies
3.3
Cover Assemblies
3.4 Print
Head Assembly
3.5
Video Amplifier Assembly
3.6
Ribbon
Cartridge
Assembly
3.7 Carriage
Assembly
3.8
Drive
Motor Assembly
3.9 Platen Drive
Assembly
3.10 Platen
Assembly
3.11
Pinch
Roller
Assembly
(26-1150)
3.12 Tear Bar
Assembly
3.13 Tractor Drive and Pin Feed Assemblies (26-1 152)
3.14 Control Panel
Assembly
3.15 Primary Voltage
3.16
Electronic
Module Assembly
3.17 Logic
Board Assembly
3.18
Hardware
Kit
3.19
Special
Tools
3.2
PRINTER SUBASSEMBLIES
(Figure 3-1
)
Figure 3-1
illustrates
and
lists
the
major
subassemblies used
in
the
printers.
Following this overall
diagram
is
a brief
functional
description,
removal/replacement/adjustment and preventive
maintenance procedures
for
each individual assembly.;
NOTE
THE MAJORITY OF THESE SUBASSEMBLIES ARE PACKAGED
IN
KIT
FORM.
THE
KIT
CONTAINS THE
SUBASSEMBLY
AND
NECESSARY
HARDWARE
TO
MOUNT
THE SUBASSEMBLY.
IF
NOT PACKAGED
IN
KIT
FORM
JUST
THE SUBASSEMBLY
IS
ILLUSTRATED
AND
LISTED.
3-1