Xerox Olympia electronic compact Troubleshooting guide

OLYMPIA

ELECTRONIC COMPACT

Prepared by:

XEROX CORPORATION

Xerox

Service Business

Training

Program

SBXMPT010

Service

Education

&

Customer

Support

1341

w:

Mockingbird

Lane

Dallas, Texas 75247

February

1984

Table

of

Contents

Program

Overview

...................................................

Page i

Introduction

and

Operation

........................................

Page

1-1

Technical

Overview

...................•............................

Page

2-1

Service

Documentation

.............•...................•...........

Page

3-1

Troubleshooting

...................................................

Page

4-1

OLYMPIA

ELECTRONIC

COMPACT

PROGRAM

OVERVIEW

The purpose

of

this

training

program

is

to

provide you

with

a

familiarization

of

the

Olympia Electronic Compact, an electronic

typewriter

utilizing

Daisy Wheel

technology which can also be used

as

a slave

printer

for

a host microcomputer.

While

completing this program you

will

learn

about

the

Electronic Compacts' basic

capabilities and

about

the

documentation

which

will

be available

for

you

when

service

is

necessary.

This

training

program

is

made

up

of

the

following

sections

or

MODULES:

MODULE 1 INTRODUCTION

AND

OPERATION

In

this

module

you

will

become acquainted

with

the

installation

of

the

unit

as

well

as

with

its general characteristics such

as

print

speed.

MODULE2 TECHNICAL OVERVIEW

Here you

will

be presented

with

information

concerning

the

actual

operation

of

the

printer.

MODULE

3 SERVICE

DOCUMENTATION

Provides a description

of

the

documentation

you

will

actually

use

to

service

the

unit

as

well

as

some practical application in its

use.

MODULE

4 TROUBLESHOOTING

Discusses

the

troubleshooting

approach supported by

the

service

documentation.

PREREQUISITES

There are no prerequisites

for

this

training

program.

ESTIMATED TIME

TO

COMPLETE

THIS

TRAINING

Approximately 3 hours

REQUIRED

RESOURCES

Olympia Service Spare Parts Catalogue

Olympia Service Description

of

Function (Service Manual)

OLYMPIA

ELECTRONIC

COMPACT

TRAINING

PROGRAM

DIRECTIONS

This

training

program

is

self-paced and does

not

require the need

of

a Course

Monitor.

The estimated

module

times are

approximate

and should be used

to

pace

yourself.

Due

to

your

on Daisy Wheel printers

it

will

not

be necessary

to

have an Electronic Compact available

at

the

time

you

go

through

this

program.

Complete

the

program

as

time

becomes available,

and

refer

to

it

for

review

when

a

unit

comes in

for

repair.

This manual

is

reusable. Do

not

write

in

it.

Answer all questions on a piece

of

scratch paper. Feedback {answers)

to

the

questions

will

be

found

at

the

end

of

each

module. Proceed

through

each

module

sequentiallyand

follow

all directions.

OLYMPIA

ELECTRONIC

COMPACT

MODULE 1

INTRODUCTION AND OPERATION

MODULE

OVERVIEW

This

module

will

introduce

you

to

the

Olympia Electronic

Compact

and

its basic

capabilities. You

will

be given

information

concerning

the

units

operation,

component

location,

and

installation.

PREREQUISITES

Completion

of

the

COURSE

OVERVIEW

MODULE

OBJECTIVE

Upon

completion

of

this

module

you

will

be able

to

answer, in

writing,

five

questions

relating

to

the

Electronic Compacts

installation,

operation,

and

basic

features.

ESTIMATED

TIME

TO

COMPLETE

THIS

MODULE

30 MINUTES

1-1

OLYMPIA

ELECTRONIC

COMPACT

SECTION

I- INTRODUCTION

The

Olympia ElectronicCompact

typewriter

utilizesDaisy Wheel

technology

and can

also be used

as

a slave printer.

ProductSpecifications

for

the

Electronic Compactare:

Size

Weight

PrintCharacteristics

FeederCharacteristics

Memory

Options

Length 376 mm

Width

491

mm

Height

137 mm

9 kg

11

CPS

speed

96

or

100 character

printwheel

10/12/15 characters

per

inch

Repeat

feature

for

all keys

Correction

feature

Stencil capability

Paper

injector

Paperend

guage

Variable

line

spacing

46 character correction

memory

16

setting

tab

memory

RS232C

serial interface

1-2

OLYMPIA

ELECTRONIC

COMPACT

PRINT

CHARACTERISTICS

The Olympia Electronic Compact

will

print

at

the

rate

of

11

CPS

in 10, 12,

or

15

characters

per

inch pitch.

When

used

as

a

typewriter

it

affords

the

operator

error

correction and an

ability

to

make any key operate in

a"

repeat"

mode.

The ribbons are a special correctable carbon

ribbon

housed in a cassette

for

easy

loading. A seperate correction

ribbon

is

also required

for

correction capability.

It

is

also possible

to

create stencils by disabling

the

ribbon

lift

function

through

a

simple keyboard command.

FEEDER

CHARACTERISTICS

When

inserting

or

ejecting

paper

the

operator

is

aided by

the

paper

injector

function

which

causes

the

platen

to

be driven by

the

index

motor

when

the

injector

lever{bail bar lever)

is

pulled

fully

toward

the

operator.

Additional

features

include

variable

line

spacing set by means

of

a keyboard control,

and

a

paper

end

gauage

to

provide a visual

indication

when

the

lastavailable line

is

being

typed

on.

MEMORY

CHARACTERISTICS

The Electronic Compact has

the

capacity

to

store

the

last 46 keystrokes

typed

and

perform

a correction

anywhere

in

this range. Also,

up

to

16

tabs may be recorded

for

a

document

in

the tab

memory.

OPTIONS

The

unit

may

be

equipped

with

an

RS232C

serial interface

allowing

it

to

be used

as

a

slave

printer

for

a host microcomputer.

1-3

OLYMPIA

ELECTRONIC

COMPACT

SECTION II -INSTALLATION

Installing

the

Electronic Compact

for

use

as

a

typewriter

is

quite

simple. You should

first check

the

carriage

for

free

movement

from

a

full

left

to

a

full

right

position,

the

unit

is

shipped

with

a

rubber

tube

cut

in

two

sections placed

around

the

carriage

rail.

If

this

tube

is

present remove

the

left

section first

and

after

moving

the

carriage

to

its

full

left

position remove

the

right

section.

You may also

find

a

rubber

band

holding

the

ribbon

cassette in place on

the

carriage which should be removed. .

At

this

time

a

print

wheel should be installed.

If

one

is

not

already

in

place,

begin

by

removing

the

ribbon

cassette. First push

the

cassette release lever on

the

right

of

the

ribbon

cassette

toward

the

platen

as

far

as

it

will

go.

Note

that

as

the

lever was

moved

the

ribbon

was

lifted

by

the

Left

& Right Center Guides

to

a position above

the

print

wheel

for

easier removal.

Now

lift

the

ribbon

straight

up

and

free

from

the

unit.

I

t

Next grasp

the

Print Wheel Release Lever located·directed

behind

the

Left Hand

Center Guide

and

pull

it

toward

you

as

far

as

possible. This

will

cause

the

Printer

Head

to

pivot

back

for

print

wheel installation.

Install

the

print

wheel

by first

orienting

the

characters

toward

the

platen,

then

aligning

the

round

center hole in

the

print

wheel

with

the

print

wheel

motor

drive

shaft and

the

elongated

hole

in

the

print

wheel

with

the

locating

mounted

on

the

print

wheel

motor

drive shaft.

As

the

print

wheel

is

pushed

onto

the

shaft

a

positive locking

effect

should be

felt.

1-4

OLYMPIA

ELECTRONIC

COMPACT

Now

lower

the

Printer

Head back

into

its

operating

position. Prior

to

seating

the

ribbon

cassette

in

place

take

up

any slack in

the

ribbon

by

manually

winding

it

in

the

direction

of

the

arrow

on

the

top

of

the

cassette.

Now

set

the

ribbon

cassette in

place on

the

carriage assembly making sure

to

position

the

ribbon

on

the

Left

and

Right Hand Center Guides

as

noted

in

the

removal procedure. Complete

the

ribbon

installation by

moving

the

Cassette Release Lever

toward

the

keyboard

as

far

as

it

will

go.

The

AC

power

cord should

now

be

plugged

into

a standard

11

SVAC

outlet

and

the

unit

turned

on

with

the

ON/OFF Switch located on

the

left

side

of

the

unit

directly

below

the

platen

knob.

When

the

unit

is

turned

on

the

carriage

will

return

to

the

full

left

position and

then

move

right

to

the

left

margin

setting.

1-5

OLYMPIA

ELECTRONIC

COMPACT

SECTION

Ill -OPERATION

USE

AS

A

TYPEWRITER

While

the

Electronic Compact

is

now

ready

for

use

as

a

typewriter,

there

are some

keys

that

provide

special

functions

which should be reviewed

prior

to

actually

operating

the

unit.

On

the

left

side

of

the

space

bar

is

a key marked

Half

Space,

and

as

the

term

implies

use

of

this key

causes

the

carriage

to

move

right

one

half

space instead

of

a

full

space.

On

the

right

side

of

the

space

bar

is

a key labeled Express. The Express key causes

the

carriage

to

be

returned

to

the

left

margin,

but

does

not

cause

the

paper

to

be

indexed(advanced).

At

the

right

of

the

keyboard

is

a special key pad

containing

several special

function

keys. The key marked

RELOC

(2nd key

from

the

top

right

hand

side)

is

used

after

making

a correction

which

involved

backspacing several characters.

When

the

RELOC

key

is

struck

it

returns

the

carriage

to

return

to

its last

position

prior

to

entering

a correction mode.

The

other

special

function

keys such

as

the

Correction Key,

Margin

Release,

and

Tab

Clear are very similar

to

those

on

a

Memorywriter

so

will

not

be covered specifically

at

this

time.

It

is

of

interest

to

note

that

the

Carriage Position

Indicator

lights

to

provide

the

operator

with

a clearly visible means

of

monitoring

the

carriage posit.ion

at

all

times.

If

you have an

operational

Electronic Compact available, install

it

at

this

time

following

the

directions given in this module.

After

installation,

type

several lines

of

text

and make some corrections using

the

correction and

RELOC

keys.

USE

AS

A

SLAVE

PRINTER

In

order

to

use

the

Electronic Compact

as

a slave

printer

it

must be

equipped

with

the

080

Serial

Printer

Interface.

While

many

units

already have this interface,

there

are also a

great

number

that

do

not.

As

a result, you may be asked by

the

customer

to

install

the

interface

which

they

will

obtain

and

bring

to

you

along

with

the

ElectronicCompact.

If

you

are

completing

this

training

program

with

an Electronic Compact

that

has

the

080

Interface already installed, proceed

to

the

heading

"SLAVE

PRINTER

OPERATION" on Page 1-8.

If

you are

completing

this

training

program

with

a

unit

that

is

to

have

the

080

Interface installed, proceed

with

the

instructions in

the

"OLYMPIA

080

INTERFACE

INSTALLATION". In

the

event

that

you are

completing

this

program

with

an Electronic Compact

that

does

not

have

the

080

Interface installed, and

it

is

not

to

be installed

at

this

time

read

the

rest

of

this

module

for

information

purposes.

1-6

OLYMPIA

ELECTRONIC

COMPACT

.

OLYMPIA

080

INTERFACE INSTALLATION

The

following

instructions

will

direct

you

through

the

installation

of

the

D80 Serial

Printer

Interface

in

the

event

that

you are asked

to

do

so

by a customer.

1.

Disconnect

AC

power

by

unplugging

the

power

cord

from

the

wall

outlet,

or

the

unit

itself. Remove

upper

housing

of

the

Electronic Compact by

removing

two

screws on

the

rear

of

the

bottom

housing. Remove

the

platen

knob

by

pulling

it

straight

off.

Remove

the

upper

housing

by

pressing in on

both

sides

of

the

housing

while

at

the

same

time,

lifting

straight

up.

2.

Remove

the

two

screws

which

hold

down

the

Keyboard assembly.

3.

Turn

the

keyboard

assembly upside

down

to

access

the

main

logic

board.

4. Carefully remove

the

large 40

integrated

circuit (IC4)

from

its socket.

(See

Figure 1), and insert

it

into

the

vacant socket on

the

D80

Interface

board

(location

marked

U16).

Be

sure

that

you install

the

IC

with

the

small

notch

on

one;end

oriented

in

the

same

direction

as

the

notch

on

the

socket.

5.

Carefully

remove

the

left

hand

flat

keyboard cable

from

the

Keyboard

plug

socket

marked

Cone 1 on

the

main

logic

board.

Also remove

the

plug

connector

marked

Cone

4.

6.

Locate

the

three

threaded

studs

where

the

main

logic

board

is

mounted

to

the

keyboard

assembly. On

the

exposed threads

of

each

of

the

three

studs, install

one

of

the

threaded

standoffs

which

is

supplied

with

the

D80

interface

kit.

7.

The D80

interface

board

has pins

which

protude

from

its

bottom

side. These

pins are designed

to

insert

into

the

now

vacant sockets

of

IC4,

and

the

left

hand

keyboard

plug

of

the

main

logic

board. Carefully

position

the

D80

interface

board

over

the

main

logic

board,

and

align

it

such

that

the

two

sets

of

pins

will

insert

into

the

40

and

10

sockets, and

then

press

firmly

to

seat

the

pins

into

the

connectors.

8.

Plug

the

left

side

flat

keyboard

cable

into

the

plug

socket

marked

P1

on

the

D80

interface

board.

9.

Plug

the

Cone 4

plug

into

the

main

logic

board

through

the

square

hole

in

the

D80

interface

board.

10.

Install

the

3 machine screws

through

the

DSO

interface

board

and

into

the

threaded

standoffs

which

were

installed in step

#6.

Do

not

over

tighten

these

screws

or

the

PCB

may be cracked

or

damaged.

1-7

OL

YMPIAELECTRONIC COMPACT

11.

Now

the

power

supply wires must be connected. These are

the

two

loose

wires (one gray and one blue) which are soldered

to

the

D80 interface board.

They

will

be connected using

the

two

red clamps provided. Locate

the

plug

connector which attaches

to

the

main logic board

at

a

point

marked Cone

6.

The gray

wire

on

the

Cone 6 cable attaches

to

the

gray

wire

on

the

080

interface. Likewise,

the

blue

wire

on

the

Cone 6 cable attaches

to

the

blue

wire

on

the

D80 interface board. When

applying

the

wire

clamps, be sure

that

the

wire$ are contacting

the

metal points inside

the

clamps

so

that

the

insulation

will

be pierced by

damp.

The clamp should be squeezed

together

until

it

locks using a

pair

of

pliers

12.

It

is

now

time

to

install

the

data cable on

the

D80 interface board. First

it

will

be necessary

to

route

the

cable

through

the

rear

of

the

lower

housing.

Use

a

pair

of

pliers

to

twist

out

one

of

the

louvers on

the

lower

housing and

route

the

data

cable

through

the

opening.

Be

sure

to

route

the

cable

around

the

printer

chassis

so

that

there

can

be

no

interference

with

printer

operation.

Plug

the

data

cable connector

onto

the

D80 interface board.

Thrs

completes

the

installation.

At

this

time

turn

to

the

ELECTRONIC

COMPACT

OPTION

SETTINGS

heading on Page 1-9. The instructions there

will

guide

you

through

the

steps required

to

verify

proper

operation

of

the

ElectronicCompact

as

a

slave

printer

connected

to

the

820 II.

SLAVE

PRINTER

OPERATION

Once

proper

operation

in

the

typewriter

configuration

has been confirmed

the

Electronic Compact may be used

as

a slave

printer

for

microcomputers

with

a serial

printer

interface. The

followin9

instructions

will

enable you

to

attach

the

Electronic

Compact

to

an 820

II

to

verify

it

sperformance in this area.

1.

Begin byconnecting

the

data cable

from

the

Electronic Compact

to

the

printer

port

of

the

820.

2.

Turn on

both

the

820and ElectronicCompact.

3.

Load a

CPM

Diskette

in

the

820. When

the

A>

prompt

appears on

the

820

display

type

CTRL

P.

This

will

direct the 820

to

print

whatever

appears on

the

display

from

this

time

on

until

another

CTRL

Pis entered.

4.

Now

type

DIR

followed

by a carriage return on

the

820. The directory

of

your

CPM

Diskette should be displayed on

the

screen, and

at

the

same

time

be

printed

by

the

ElectronicCompact.

Correct

printing

of

the

Diskette Directory verifies

the

Electronic Compact's

ability

to

function

as

slave printer, and concludes this

portion

of

the

module.

If

the

Directory

printed

properly

turn

to

the

Module

Conclusion on Page 1-10.

However,

if

following

the

above directions

did

not

produce

the

expected results

it

is

possible

that

either

the

CPM

Diskette,

or

the

Electronic Compact,

or

both

will

have

to

have certain options reconfigured. The

option

settings

of

the ElectronicCompact

should be checked first,

so

that

the

CPM

Diskette can be reconfigured

to

match it.

Continue

through

the

following

instructions

to

determine

the

option

settings

for

both

unitsand make required changes

to

the settings.

1-8

OLYMPIA

ELECTRONIC

COMPACT

ELECTRONIC

COMPACT OPTION

SETTINGS

I •

1.

Disconnect

AC

power,

by

unplugging

the

power

cord

from

the

wall

outlet,

or

the

unit

itself. Remove

upper

housing

of

the

Electronic Compact by removing

two

screws on

the

rear

of

the

bottom

housing. Remove

the

platen

knob

by

pulling

it

straight

off.

Remove

the

upper

housing by pressing in on

both

sides

of

the

housing

while

at

the

same

time,

lifting

straight

up.

2.

Remove

the

two

screws

which

hold

down

the

keyboard assembly.

3.

Turn

the

keyboard assembly upside

down

to

access

the

main

logic

board.

4.

Check

the

position

of

the

jumper

which controls

the

Baud Rate (Fig. 1). The

proper

setting

for

use

with

an 820

is

1200 Baud,

however

it

the

unit

is

set

for

another

Baud Rate

to

match

the

customers needs

it

should be

left

there. Later

on in these instructionsyou

will

be

told

how

to

match

the

820

to

the

Electronic

Compact,

at

this

time

simply make a

note

of

the

Baud Rate

the

Electronic

Compact

is

set

for.

Figure 1

BAUD

RATE

SETTING

080

INTERFACE

JUMPERS

OPTION

SETTING

5.

Just

to

the

left

of

the

Baud Rate jumpers are

the

Option

Jumpers.

Only

positions A

and

Eare used. Check

the

position

of

the

jumpers,

for

use

with

an

820

there

should be NO jumpers present

at

A

or

E.

If

there

are jumpers

at

position A

or

E,

remove

them

and set

them

aside

for

reinstallation

prior

to

returning

the

unit

to

the

customer. -

1-9

OLYMPIA

ELECTRONIC

COMPACT

6.

This completes

the

option

setting

for

the

Electronic Compact. Reposition

the

keyboard assembly and reinstall

the

two

screws which secure it. Do

not

reinstall

the

upper

housing

at

thistime.

CPM

DISKETTE

CONFIGURATION .

It

is

now

time

to

check

the

configuration

of

the

CPM

Diskette. Load

the

CPM

Diskette

into

the

820. When

the

A>

prompt

appears type

CONFIGUR

and a carriage

return.

The system

will

display:

Enter

SOURCE

disk name

(or

RETURN

for

thisdisk):

Touch

the

~eturn

Key

once.

The system

will

display:

Enter DESTINATION disk name

(or

RETURN

for

same disk):

Touch

the

Return Key once.

The system

will

display:

Enter

number

of

function

to

be executed.

Upon

completion

of

the

selected

function

the

program

will

return

to

this

menu.

Touch

ESC

when

all desired

selections have been made.

Touch

the

2 Key once.

The system

will

display:

1)

2)

3)

4)

S)

6)

7)

Record RestartCommand

SelectPrinter

Port

Options

Select Comm Port

Options

SelectI

/0

Device Assignments

Select Keyboard Data Format

Select Screen

Attributes

Select Floppy Disk Head Step Rate

Move

cursor

to

option

and

<SPACE

>to

cycle

through

valid parameters.

Touch <

ESC

>to

exit

or

<R

>to

reset

to

original

values.

OPTION

PRINTER

Baud Rade 1200

Stop

Bits 1

Word

Length 7

Parity Even

1-10

Clear-to-Send Ignore

Carrier Detect Ignore

OLYMPIA

ELECTRONIC

COMPACT

Protocol XON/XOFF

If

the BaudRate

option

is

not

set

for

the same Baud Rate

that

you determined

the

Electronic Compact was set

for

use

the

cursor

to

highlight

it, and then

use

the

space

bar

to

change

the

setting

until

it

is

the

same

as

the

ElectronicCompact.

No

other

options

will

require setting.

At

this time touch

the

ESC

key

two

times.

The system

will

display:

The selections you have made are

not

yet

in effect.

Please

enter

one

of

the

following:

·

<S>

= Save andactivate

the

selections permanently.

<Q>

or

<ESC>

<T>

=

Quit

without

making

anychanges.

= Temporarily activate the selections -

but

do

not

save

them.

If

you Did

Not

change

the

Baud Rate,

or

any

other

setting touch escape.

If

you Did

c.hange

the

Baud Rate

or

any

other

setting touch the S key. Remember

that

if

you

changed any

Option

Settings

they

are

now

permanently recorded on

the

diskette,

and

that

to

change

them

again this procedure

will

have

to

be repeated.

Now

that

both

the

820 and

the

Electronic Compact have

the

same

option

settings

the

Diskette Directory should

print

properly. Again,

from

the

A>

prompt

on

the

820 type

CTRL

P,

and

then

DIR.

The result should be simultaneous display, and

printing

of

the

Diskette Directory.

If

the units are still

not

producing

the

expected

results continue

with

this

training

program

to

it'sconclusion,

after

which you

will

be

better

prepared

to

troubleshoot

anyremaining problems.

MODULE

CONCLUSION

In this

module

you have been given

information

on

the

Olympia Electronic

Compact. You have read

about

its capabilities and

how

to

install

it

for

use

as

a

typewriter.

Now

proceed

to

the

testquestions on the

1-11

OLYMPIA

ELECTRONIC

COMPACT

This page

intentionally

left

blank

1-12

DIRECTIONS:

OLYMPIA

ELECTRONIC

COMPACT

MODULE 1-

Introduction

TEST.

Answer

the

following

questions on a separate sheet

of

paper. Do

not

write

in

this

book.

When

you are finished,

verify

your

answers

with

the

feedback sheet located

on

the

1.

What

aid

is

provided

for

the

operator

when

loading

paper?

2.

How

many previously

typed

characters are stored

in

memory

for

correction

as

necessary?

3.

What

is

the

function

of

the

Express

Key?

4.

What

means

is

provided

to

use

the

El~ctronic

Compact

as

aslave printer?

5.

How

is

the

RELOC

key used

in

the

correction process?

1-13

OLYMPIA

ELECTRONIC

COMPACT

MODULE 1-

Introduction

..

TEST

-

Feed

back

1.

What

aid

is

provided

for

the

operator

when

loading

paper?

Paper ejectorfeature indexes.platen

2.

How

many previously typed characters are stored in memory

for

correction

as

necessary? ·

46

3.

What

is

the

function

of

the

Express

Key?

Return carriage

w/o

line feed

4.

What

means

is

provided

to

use

the

ElectronicCompact

as

a slave printer?

0825Serial Plug

5.

How

is

the

RELOC

key used in

the

correction process?

Returns carriage

to

original position

1-14

OLYMPIA

ELECTRONIC

COMPACT

MODULE 2

TECHNICALOVERVIEW

MODULE OVERVIEW

In this

module

you

will

be

introduced

to

the

major

components

of

the

Electronic

Compactand

their

purposes.

PREREQUISITES

Completion

of

the

INTRODUCTION AND OPERATION

Module.

MODULE

OBJECTIVE

After

completin~

this

module

you

will

be

able

to

answer

five

questions, in

writing,

relative

to

ElectronicCompact

component

functions

and

locations.

ESTIMATED TIME

TO

COMPLETE

THIS

MODULE

1HOUR

2-1

OLYMPIA

ELECTRONIC

COMPACT

HARDWARE CONFIGURATION

The

following

six major assemblies make

up

the

Electronic Compact, and

they

will

be discussed in

the

orderlisted here:

1.

Chassis

and platen Assembly

2.

Keyboard Assembly

3.

Printer Assembly

4. Power

Pack

Assembly

5.

PrintControl 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

itscommands.

PRINTER

ASSEMBLY

This assembly has

the

most visible functions

with

sub- assemblies such

as

the

printwheel

motor,

hammersolenoid, and

ribbon

feed

motor

combining

to

produce

the

actual

output

of

the

ElectronicCompact,

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

varioussources

within

the

unit

and

from

the

operator

this

circuit board controls all functions such

as

hammerfire,

print

wheel movement,

paperindexing, and carriage positioning.

Major

components located on

the

PrintControl Circuit Board include:

HOUSING

IC

1Keyboard

Buffer

IC4CPU

IC

10

Inverter

for

DriverCircuits

Drivers

for

all motors

as

well

as

the

hammersolenoid.

The purpose

of

this assembly

is

to

efficiently

lodge

all

of

the

components necessary

for

operation

of

the

ElectronicCompact.

2-2

Xerox OLYMPIA ELECTRONIC COMPACT Troubleshooting guide

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