Epson MX-80 IIIF/T Bedienungsanleitung

UV-

MX-BO

EPSON

DOT

MATRIX

PRINTER

Technical

Manual

NORTHAMBER

LIMITED

CHEAT

OAK

HOUSE,

ALBANY

CLOSL-,

ESHER,

SURREY.

KT109JR

Telephofic;

Esher

(0372)

62071

INTRODUCTION

This

technical

manual

describes

the

principles

mechanical

and

electrical

operations,

well

the

maintenance

and

repair

pro

cedures,

the

EPSON MX-80 Dot Matrix Printer, to

permit

the

user

understand

its

functions

and

thereby

allow

the

Printer

to fully

display

its

rated

performance.

Chapters

3through 5 of the manual

deal

with

the

fundemental

troubleshooting,

maintenance

and

repair of

the

MX-80,

and

Chapter

6, a

simple

quick

troubleshooting

procedure

the

basis

of a block-

to-block

replacement.

For

details

the

disassembly,

assembly,

troubleshooting

and

maintenance

the

M-3210

Printer

Mechan

ism, refer to

the

separately

published

"Technical

Manual of EPSON

Model-3210."

'The

contents

this

nianuol

are

subject

change

without

notice.

SHINSHU

SEIKI

LTD

"All

rights

reserved."

HIROOKA SHIOJIRI-CITY NAGANO JAPAN

REV.

TABLE

CONTENTS

CHAPTER

GENRAL

1.1

Features

MX-80

1-1

1.2

Features

Interfaces

1-1

1.3

Serviceability

1-1

1.4

General

Specifications

MX-80

1-2

1.4.1

Printer

1-2

1.4.2

Parallel

Interface

(Standard)

1-2

1.5

Major

Components

1-3

CHAPTER

PRINCIPLES

OPERATION

2.1

General

2-1

2.2

Block

Diagrams

2-1

2.3

Principles

Operation

2-9

2.4

Electrical

Circuits

2-9

2.5

Operating

Principles

Printer

Mechanism

2-23

2.5.1

Head

carriage

and

paper

feeding

mechanisms

2-23

2.5.2

head

2-23

2.5.3

Ribbon

feeding

mechanism

2-34

2.5.4

Detecting

mechanism

2-24

2.5.5

Frame

section

2-24

CHAPTER

DISASSEMBLY,

ASSEMBLY

AND

TROUBLESHOOTING

3.1

General

3-1

3.2

Tools

and

Measuring

Instruments

3-1

3.3

Disassembly

and

Assembly

3-3

3.3.1

Removal

Upper

Case

3-3

3.3.2

Disassembly

electric

ciucuit

block

3-5

3.3.3

Disassembly

M-3210

printer

mechanism

block

3-9

3.4

Symptoms

Trouble

and

Repair

3-15

3.4.1

General

3-15

3.4.2

Troubleshooting

symptom

3-1

3.4.3

Troubleshooting

control

circuit

board

3-20

CHAPTER

MAINTENANCE

4.1

General

4-1

4.2

Lubrication

4-1

4.2.1

Lubricants

4-1

4.2.2

Lubrication

standards

4-1

4.2.3

Bonding

Standards

4-2

4.3

Adjustments

4-4

4.3.1

Adjustment

head

driving

pulse

width

4-4

4.3.2

Adjustment

timing

pulse

generating

position

4-5

4.3.3

Adjustment

phase

relationship

between

timing

signal

and

reset

signal

4-6

CHAPTER

CIRCUIT

DIAGRAMS

5.1

GENERAL

5-1

5.2

Connection

Diagrams

5-1

5.3

Component

Layout

Drawings

5-5

CHAPTER

SIMPLE

TROUBLESHOOTING

6.1

General

6-1

6.2

Troubleshooting

6-1

REV.

Fig.

1.1

Fig.

1.2

Fig.

1.3

Fig.

1.4

2.1

2.2

.2.3

2.4

2.5

2.6

.2.7

2.8

2.9

LIST

FIGURES

CHAPTER

GENERAL

1-3

M-3210

Printer

Mechanism

Main

and

Driver

Circuit Boards

1-4

Power

Supply

Circuit

Upper and Lower

Cases

CHAPTER

PRINCIPLES OF

OPERATION

Flow

Signals

Component

Layout

Fuse

Filter

Circuit.

Connection

Diagram

Fuse

Filter

Circuit

—

Windings of

Transformer

Rectifier

and Constant-Voltage

Circuit

Flow

Data

and Signals

through

8155

8155 and Peripheral Circuits

Data

Transfer

Sequence ^^

Carriage

Stepper

Motor

Drive

Signals

(Forward)

2-1

2-9

2-10

2-12

2-13

2.10

Paper

Feed

Stepper

Motor

Drive

Signals.

2-14

2-15

2.11

8041

and

Peripheral

Circuits

2.1

2 Signal

ALE

2.13

8049

and

Program

Memory

Circuits

2.1

Locations

DIP

Switches

2.15

DIP

Switch

Status

Read

Circuit

2.16

Reset

(HP

Sensor)

Circuit

2-18

2.17

Timing

(PTS)

Sensor

Circuit

2.18

Timing

and

Reset

Detection

Signals

2.19

Driver

Circuit

2.20

Current

Waveform

Head

2.21

Applied

Voltage

vs.

Driving

Pulse

Width

2.22

Switches

and

Indicators

control

Panel.

2.23

Switch

and

Indicator

Control

Circuit

2.24

Operation

Head

2-16

2-17

2-19

2-20

2-21

2-22

2-23

LIST

FIGURES

CHAPTER

DISASSEMBLY,

ASSEMBLY

AND

TROUBLESHOOTING

Fig. 3.1

Removal

Manual

Paper

Feeding

Knob

3-3

Fig.

3.2

Removal

of 4

Screws

3-3

Fig.

3.3

Locations

Respective

Components

3-4

Fig.

3.4

Dismounting

Driver

Circuit

Board

3-5

Fig.

3.5

Removal

Control

Circuit

Board

3-6

Fig.

3.6

Removal

Power

Transformer

3-7

Fig.

3.7

Dismounting

Fuse

and

Filter

Circuit

Board

3-8

Fig.

3.8

Dismounting

M-3210

Printer

Mechanism

3-9

Fig.

3.9

Dismounting

of Print

Head

Unit

3-10

Fig.

3.10

Dismounting

Home

Position

Sensor

Assy

3-10

Fig.

3.11

Unsoldering

Four

Lead

Wires

3-11

Fig. 3.1 2

Dismounting

PTS

Sensor

Board

Assy

3-11

Fig.

3.13

Dismounting

of Timing Belt Motor

Assy

3-12

Fig.

3.14

Unsoldering

Lead

Wires

3-13

Fig.

3.15

Dismounting

Paper

Feeding

Motor

Assy

3-13

Fig. 3.1 6

Dismounting

of PE

Board

Assy

3-1 4

Fig.

3.17

Normal

Waveform

Signal

PSEN

3-20

Fig.

3.18

Normal

Waveform

Signal

ALE

3-20

Fig.

3.19

Normal

Waveform

Signal

SYNC

3-21

CHAPTER

MAINTENANCE

Fig. 4.1

Lube

Points

and

Bonding

Points

4-3

Fig.

4.2

Applied

Voltage

vs. Driving

Pulse

Width

4-4

Fig. 4.3 Timing

Signal

PTS

(Pin No.39 of

8049)

4-5

Fig.

4.4

Relationship

between

Timing

Signal

and

Signal

PRAV

4-5

Fig.

4.5

Adjustment

PTS

Sensor

Board

4-6

Fig. 4.6

Relationship

between

Timing

Signal

and

Reset

Signal

4-6

Fig.

4.7

Adjustment

Home

Position

Sensor

Assy

4-7

CHAPTER

CIRCUIT

DIAGRAMS

Fig. 5.1

Connection

Diagram

Control

Circuit

5-3

Fig.

5.2

Connection

Diagram

of Driver

Circuit

5-4

Fig.

5.3

Component

Layout

Control

Circuit

5-5

Fig.

5.4

Component

Layout

of Driver

Circuit

5-6

RFW

LIST

TABLES

CHAPTER

PRINCIPLES

OPERATION

Table

2.1 Pin

Assignment

of ONI

2-2

Table

2.1

Pin Assignment of CN1 (cont.)

2-3

Table 2.2 Pin Assignment of CN2 2-4

Table 2.3 Pin Assignment of CN3

2-5

Table 2.4 Pin

Assignment

of CN4

2-6

Table

2.5 Pin

Assignment

of CN5 2-7

Table

2.6 Pin

Assignment

of CN6

2-8

Table 2.7 Signal Lines from Control Circuit to Control Panel 2-21

CHAPTER

DISASSEMBLY. ASSEMBLY AND TROUBLESHOOTING

Table

3.1 List of

Tools

3-2

Table 3.2 List of Measuring Instruments 3-2

Table 3.3 Replaceable Circuit Components 3-15

Table 3.4 Replaceable Mechanical Components

3-15

Table 3.5 Major Components on Control Circuit Board 3-20

Table

3.6

3-21

CHAPTER

MAINTENANCE

Table

4.1 List of

Lube

Points

4-1

Table 4.2 List of Bonding Points 4-2

CHAPTER

SIMPLE

TROUBLESHOOTING

Table 6.1 Replaceable Components in Simple Troubleshooting 6-1

REV.

CHAPTER

GENERAL

CONTENTS

1.1

Features

MX-80

1-1

1.2

Features

Interfaces

1-1

^ 1.3 Serviceability 1-1

1.4 General Specifications of MX-80

1-2

1.4.1

Printer

1-2

1.4.2

Parallel

Interface

(Standard)

1-2

1.5 Major Components

1-3

RFV.

1.1

Features of MX-80

1.1

rcaiuic<»

•oi

matrix

nrinter

featuring

CPS

bi-directional

printing

with

logical

The

MX-80

fformation,

and

fruit

our

constant

seeking

capability

and

9 9

dot

performance.

The

Printer

thus

.„„„S

pu...«

rrr»or.:;rrinr.zT..rir;r^d..,.

MX-80,

1.2

Features

Interfaces

:::

L^n^ar"

nt:rS::hrMx°8Tcirbe':^

for

data

communication.

th^

fin

has

the

following

interface

options

which

pef^t'me

Ir^cTntct'^

almost

all

the

computers

equipped

with

various

interfaces.

level

prescribed

for

serial

interfaces

the

EIA

Printer

receive

data

bit

rate

ranging

from

9.600

BPS.

=h:

ated

into

the

computer

(4) TRS-80 Interface

TRS-80

Interface

system

TRS-80

computer

manufac-

This

optional

interface

connected

the

bus

system

a i o ^

tured

the

Tandy

Radio

Shack,

permit

printing

the

TRS-80

programs

data

'he

MX^8a

.o^figured

cope

with

various

interfaces.

For

further

ir.rrr:."r

«...

™™.i

—

published

for

each

interface.

1.3

Serviceability

The

MX-80

has

been

designed

minimize

maintenance

and

repair

operation

under

its

Should

maintenance

Scents

can

S^reasi?'rcrir;"Lrer,sU"

it^

penorm

minimum

maintenance

and

repair

with

ease

referring

this

manual.

REV. A

1.4

General

Specifications

MX-80

1.4.1

Printer

(1) Printing

Method

Impact

dot

matrix

(2)

Character

Set

ASCII

Graphic

+ 9

special

characters/symbols

(Selectable

oper

ator)

(3)

Character

Font

9x9

dot

matrix

(4) Character Size

2.1

(W)

x 3.1 mm

(H)

(0.08" x

0.12")

(5) Paper Feed Adjustable sprocket feed

(6)

Paper

Fanfold

paper

(7) Paper Width • 101.6 mm (4") - 254 mm (10")

(8) Copies One original plus two carbon

copies

(9)

Paper

Thickness

0.3 mm (0

01")

max.

(10) Line

Spacing

4.23 mm (1/6"). or

programmable

(11)

Columns

(Normal

size)

(Enlarged

size)

132

(Condensed

size)

(Condensed-enlarged

size)

(12) Print

Speed

CPS (Normal)

(13) Ribbon Cartridge Ribbon (exclusive use). Black'

(14) Dimensions

374

mm (W) x

305

mm (D) x 107 mm

(H)

(14.7"x

I2.0"x

2")

(15)

MTBF

5 X10'Mines (excluding print head)

(16)

Head

Life

100

x 10"

characters

1.4.2

Parallel

Interface

(Standard)

(1)

Date

transfer

rate

1.000

CPS

(max)

(2) Synchronization

externally supplied

STROBE

pulses.

(3) Handshaking

ACKNLG

BUSY

signals

(4) Logic level Input data and all interface control' sig

nals

are

compatible

with

the

TTL level.

REV.

A H2

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