OLYMPIA
ELECTRONIC
COMPACT
HARDWARE CONFIGURATION
The
following
six major assemblies make
up
the
Electronic Compact, and
they
will
be discussed in
the
order listed here:
1.
Chassis
and platen Assembly
2.
Keyboard Assembly
3.
Printer Assembly
4. Power
Pack
Assembly
5.
Print Control Circuit Board
6.
Housing Assembly
CHASSJS
and
PLATEN
ASSEMBLY
The
function
of
this assembly
is
to
properly
position and
hold
the
paper.
Major
components
of
this
assembly are
the
Platen, Index
Motor,
and
Feed
Rollers.
KEYBOARD
In
the
typewriter
mode
the
keyboard provides
the
unit
with
the
operator
input
used
to
determine
which characters should be struck,
when
to
execute a
line
feed, etc.
When
used
as
slave
printer
this
information
primarily
comes
from
the
host
microcomputer,
but
it
is
important
to
note
that
the
keyboard
is
not
disabled and
the
unit
will
respond
to
its commands.
PRINTER
ASSEMBLY
This assembly has
the
most visible functions
with
sub- assemblies such
as
the
printwheel
motor,
hammer solenoid, and
ribbon
feed
motor
combining
to
produce
the
actual
output
of
the
Electronic Compact,
the
printed
page.
POWER
PACK
The purpose
of
the
Power
Pack
is
to
provide regulated
DC
voltages, transformed
from
AC
line
voltage,
to
the
various electrical and electronic components
within
the
unit.
PRINT
CONTROL
CIRCUIT
BOARD
While
monitoring
inputs
from
various sources
within
the
unit
and
from
the
operator
this
circuit board controls all functions such
as
hammer fire,
print
wheel movement,
paper indexing, and carriage positioning.
Major
components located on
the
Print Control Circuit Board include:
HOUSING
IC
1 Keyboard
Buffer
IC4CPU
IC
10
Inverter
for
Driver Circuits
Drivers
for
all motors
as
well
as
the
hammer solenoid.
The purpose
of
this assembly
is
to
efficiently
lodge
all
of
the
components necessary
for
operation
of
the
Electronic Compact.
2-2
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