Epson DLQ-3000 Minerva+ User manual

EPSON

24-PIN DOT MATRIX PRINTER

EPSON DLQ-3000+

SERVICE MANUAL

SEIKO EPSON CORPORATION

4008259

NOTICE



without SEIKO EPSON’s express written permission is forbidden.



The contents of this manual are subjects to change without notice.



All efforts have been made to ensure the accuracy of the contents of this manual.

However, should any errors be detected, SEIKO EPSON would greatly appreciate

being informed of them.



The above notwithstanding SEIKO EPSON can assume no responsibility for any errors

in this manual or the consequences thereof.

EPSON is a registered trademark of SEIKO EPSON CORPORATION.

General Notice:

Other product names used herein are for identification purposes only and may be

trademarks or registered trademarks of their respective companies.

Nagano, Japan

iii

PRECAUTIONS

Precautionary notations throughout the text are categorized relative to 1) personal injury and 2)

damage to equipment.

WARNING

Signals a precaution which, if ignored, could result in serious or fatal personal

injury. Great caution should be exercised in performing procedures preceded by

WARNING Headings.

CAUTION

Signals a precaution which, if ignored, could result in damage to equipment.

The precautionary measures itemized below should always be observed when performing

repair/maintenance procedures.

WARNING

1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND

PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURES.

2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH

BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN

THEIR LINE OF WORK.

3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL. DO NOT

CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN

THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN

WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.

CAUTION

1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY EPSON

CERTIFIED REPAIR TECHNICIAN.

2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE,

LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A

PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT

CONNECT IT TO THE POWER SOURCE.

3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE

POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS

AND/OR INDIVIDUAL CHIPS.

4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE

STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN

ACCESSING INTERNAL COMPONENTS.

5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY

THE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE ICs OR OTHER

NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY

APPLICABLE EPSON WARRANTY.

PREFACE

This manual describes functions, theory of electrical and mechanical operations, maintenance,

and repair of DLQ-3000+.

The instructions and procedures included herein are intended for the experience repair technician,

and attention should be given to die precautions on the preceding page. The Chapters are

organized as follows:

CHAPTER 1. GENERAL DESCRIPTION

Provides a general product overview, lists specifications, and illustrates the main components of

the printer.

CHAPTER 2. OPERATING PRINCIPLES

Describes the theory of printer operation.

CHAPTER 3. DISASSEMBLY AND ASSEMBLY

Includes a step-by-step guide for product disassembly and assembly.

CHAPTER 4. ADJUSTMENT

Includes a step-by-step guide for adjustment.

CHAPTER 5. TROUBLESHOOTING

Provides EPSON-approved techniques for troubleshooting.

CHAPTER 6. MAINTENANCE

Describes preventive maintenance techniques and lists lubricants and adhesives required to

service the equipment.

APPENDIX

Describes connector pin assignments, circuit diagrams, circuit board component layout and

exploded diagram.

The contents of this manual are subject to change without notice.

REVISION SHEET

Revision Issued Data Contents

Rev. A August 21 1997 First Release

TABLE OF CONTENTS

CHAPTER 1. GENERAL DESCRIPTION

CHAPTER 2. OPERATING PRINCIPLES

CHAPTER 3. DISASSEMBLY AND ASSEMBLY

CHAPTER 4. ADJUSTMENT

CHAPTER 5. TROUBLESHOOTING

CHAPTER 6. MAINTENANCE

APPENDIX

Chapter 1

Product Description

1.1 Features ..................................................................................................1-1

1.2 Consumables and Options....................................................................1-3

1.3 Hardware Specification..........................................................................1-4

1.3.1 printing Specification....................................................................1-4

1.3.2 Character Specifications and Control Codes.............................1-7

1.3.2.1 Coded Character Sets.........................................................1-7

1.3.2.2 Type Faces..........................................................................1-7

1.3.2.3 Rendition .............................................................................1-7

1.3.2.4 Combination of character tables and typefaces ..................1-8

1.3.2.5 Memory Size........................................................................1-9

1.3.2.6 Character Size.....................................................................1-9

1.3.2.7 Control Codes......................................................................1-9

1.3.3 Paper Feed Specification............................................................1-10

1.3.3.1 Friction Feed (Cut sheet)...................................................1-10

1.3.3.2 Tractor Feed (Continuous paper)......................................1-10

1.3.3.3 Paper Feed Speed and Accuracy......................................1-10

1.3.4 Paper Specification.....................................................................1-11

1.3.5 Printable Area..............................................................................1-17

1.3.6 Paper Thickness Detection ........................................................1-24

1.3.7 Ribbon Cartridge.........................................................................1-25

1.3.7.1 Monochrome ribbon cartridge............................................1-25

1.3.7.2 Color ribbon cartridge........................................................1-25

1.3.8 Input Data Buffer .........................................................................1-26

1.3.9 Electric Specifications................................................................1-26

1.3.10 Safety Approvals .......................................................................1-26

1.3.11 CE Marking.................................................................................1-26

1.3.12 Acoustic Noise...........................................................................1-27

1.3.13 Reliability....................................................................................1-27

1.3.14 Environmental Conditions........................................................1-27

1.4 Interfaces ..............................................................................................1-28

1.4.1 Parallel Interface..........................................................................1-28

1.4.2 Serial Interface.............................................................................1-33

1.4.3 Optional Interface........................................................................1-34

1.4.4 Printer language..........................................................................1-35

1.4.5 Prevention Hosts from Data Transfer Time-out .......................1-36

1.4.6 Interface Selection ......................................................................1-36

1.5 Operation ..............................................................................................1-37

1.5.1 Control Panel...............................................................................1-37

1.5.1.1 Button Operations..............................................................1-37

1.5.1.2 Printer Status and LCD/LED Indicator Conditions.............1-39

1.5.1.3 Printer Status and Buzzer..................................................1-40

1.5.2 SelecType.....................................................................................1-41

1.5.2.1 SelecType Phase ..............................................................1-41

1.5.2.2 SelecType Operation.........................................................1-42

1.5.2.3 SelecType Option..............................................................1-43

1.5.3 Functions at Power On ...............................................................1-45

1.5.4 Bi-D Adjustment Mode................................................................1-46

1.5.5 Program Reload Mode................................................................1-46

1.5.6 Initialization..................................................................................1-47

1.5.6.1 Printer Initialization............................................................1-47

1.5.6.2 Initialize Defaults to the Standard......................................1-48

1.6 Main Components................................................................................1-49

1.6.1 C210MAIN Board.........................................................................1-49

1.6.2 C124PSB/PSE Board...................................................................1-50

1.6.3 Printer Mechanism......................................................................1-50

1.6.4 Housing........................................................................................1-51

Product Description

Rev. A 1-1

1.1 Features

The DLQ 3000+, equipped with a Bi-directional parallel interface, is the most advanced

EPSON 24-pin impact-dot printer. It prints on continuous multi-part form as well as on single

sheet, which makes the printer highly usable in office environment . The main features of

this printer are:

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Used in Network environment with parallel interface supported

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Memory

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CSF paper quantity sensor

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Paper jam detection



Enhanced duplex printing

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1 original plus 6 duplications in the copy mode

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Wide printable area

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70 line / A4 (0 mm can be set for the top and bottom margins at single print mode.)

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Paper thickness detection function supported

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Enables the auto and manual platen gap adjustment

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Fonts

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Bitmap fonts: 9 LQ and 1 draft typefaces

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Scalable fonts: 4 typefaces

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Bar-code fonts: 8 typefaces

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Character tables

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Standard version: 11 tables

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NLSP version: 30 tables

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Control codes

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ESC/P2

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IBM 2391 Plus Emulation

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Input buffer

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128 K byte

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Interface

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Bi-directional parallel interface (IEEE-1284 nibble mode supported)

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Serial interface (EIA-232D)

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Type-B interface level 2 (Optional)

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Reliability

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Total print volume: 9 million lines

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Printhead life: 200 million strokes

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Ribbon life: 6 million characters

DLQ-3000+

Rev. A

1-2

Printer Cover

Rear Paper Guide

Control Panel

Knob

Paper Bail

Right Guide Edge

Right Guide Edge Lock

Printhead

Front Paper Guide

Left Guide Edge

Left Guide Edge Lock

Power Switch

Paper Thickness Adjust Lever

Ribbon Cartridge

Paper Support

Release Lever

Tractor Unit

Parallel Interface

Serial Interface

Figure 1-1. Exterior View of DLQ 3000+

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