Epson DLQ-3000 Minerva+ User manual

EPSON
24-PIN DOT MATRIX PRINTER
EPSON DLQ-3000+
SERVICE MANUAL
SEIKO EPSON CORPORATION
4008259

ii
NOTICE
 All rights reserved. Reproduction of any part of this manual in any form whatsoever
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.
Copyright 1997 by SEIKO EPSON CORPORATION
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.

iv
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.

v
REVISION SHEET
Revision Issued Data Contents
Rev. A August 21 1997 First Release

vi
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:
 Used in Network environment with parallel interface supported
 Memory
 CSF paper quantity sensor
 Paper jam detection
 Enhanced duplex printing
 1 original plus 6 duplications in the copy mode
 Wide printable area
 70 line / A4 (0 mm can be set for the top and bottom margins at single print mode.)
 Paper thickness detection function supported
 Enables the auto and manual platen gap adjustment
 Fonts
 Bitmap fonts: 9 LQ and 1 draft typefaces
 Scalable fonts: 4 typefaces
 Bar-code fonts: 8 typefaces
 Character tables
 Standard version: 11 tables
 NLSP version: 30 tables
 Control codes
 ESC/P2
 IBM 2391 Plus Emulation
 Input buffer
 128 K byte
 Interface
 Bi-directional parallel interface (IEEE-1284 nibble mode supported)
 Serial interface (EIA-232D)
 Type-B interface level 2 (Optional)
 Reliability
 Total print volume: 9 million lines
 Printhead life: 200 million strokes
 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+

Product Description
Rev. A 1-
3
1.2 Consumables and Options
Table 1-1. Accessories and Options
Part Number Description
Consumable Supplies
S015066 Ribbon cartridge (Black)
S015067 Ribbon cartridge (Color)
Optional Equipment
C806830 Cut sheet feeder
C82307∗/ C82308∗32KB intelligent serial I/F card
C82310∗/ C82311∗32KB intelligent parallel I/F card
C82312∗Localtalk™ card
C82313∗32KB IEEE-488 I/F card
C82314∗Coax I/F card
C82315∗Twin-Ax I/F card
C82331∗Ethernet I/F card
C82345* IEEE-1284 parallel I/F card
C82346 Multi Protocol Ethernet I/F card
Accessory Equipment
Power supply cable *
2
Note:
1. Asterisk at the end of the part numbers replaces the last digit of the part number,
which varies by the market.
2. Can be an accessory item according as market.

DLQ-3000+
Rev. A
1-4
1.3 Hardware Specification
1.3.1 printing Specification
 Print method Impact-dot matrix
 Print pin arrangement 24-pin rhombus (See Figure 1-2.)
0.86 m m =1/30"+1/2160"
6x0.023m m (=1-1080")
6x0.023m m (=1-1080")
3.25m m (=1/180"x23)
0.14 m m (=1/180")
11x0.28m m (=1/90")
11x0.28m m (=1/90")
#1 #2
#23 #24
Figure 1-2. Pin Arrangement
 Printing direction Bi-directional printing with logic seeking
 Resolution See Table 1-2.
Table 1-2 .Printing Resolution
Printing Mode Horizontal Density Vertical Density Adjacent Dot Print
High speed draft 90 dpi 180 dpi No
Draft 120 dpi 180 dpi No
Draft condensed 240 dpi 180 dpi No
LQ 360 dpi 180 dpi No
8-pin bit image 60, 80, 90 or 120 dpi 60 dpi Yes
120 or 240 dpi 60 dpi No
24-pin bit image 60, 90, 120 or 180
dpi 180 dpi Yes
360 dpi 180 dpi No
Raster graphics 180 or 360 dpi 180 or 360 * dpi Yes
Note:When a color ribbon is installed, the printer can not print vertical 360 dpi graphics. In
that case, the printer changes vertical density to 180 dpi.

Product Description
Rev. A 1-
5
 Printing speed See Table 1-3.
Table 1-3. Printing Speed
Printing Mode Character Size Maximum Printing Speed
Mode 0 Mode 1 Mode 2 Mode 3 Mode 4
High speed draft 10 cpi 444 444 160 160 240
10 cpi 360 333 240 120 180
Draft 12 cpi 432 400 288 144 216
15 cpi 540 500 360 180 270
Craft condensed 17 cpi 309 286 206 103 154
20 cpi 360 333 240 120 180
10 cpi 120 111 80 40 60
LQ 12 cpi 144 133 96 48 72
15 cpi 180 167 120 60 90
LQ condensed 17 cpi 206 190 137 68 103
20 cpi 240 222 160 80 120
Raster (360 dpi) 10 cpi 20 20 20 20 20
Printing Speed Mode Selection
This printer is designed to control the printing speed according to the power supply voltage
and printhead temperature. When the power supply voltage drops to the limit, the printer
stops printing, then resumes the job at a slower speed to print the remaining data for the
line. When the printhead temperature rises to the limit, the printer stops printing. Then it
resumes printing at a slower speed if the printhead temperature recovers to the specified
level. The printing speed mode is determined according to the flowchart shown in Page 1-6.

DLQ-3000+
Rev. A
1-6
YES
NO
YES
NO
YES
YES
NO
START
>
=
Is p rin t d u ty
5 0 % ?
M ode 4
M ode 2
M ode 0
M ode 1
P-Down*?
<
Is th e
head tem perature
1 2 C ?
>
=
Is paper
thickness
0.19 m m ?
>
=
Is the head
tem perature
3 8 C ?
B lack color print?
YES
YES
C opy 2 m ode? M ode 3
NO
M ode 2M ode 2
NO
NO
M ode 2M ode 2
YES
NO
B lack color print?
NO
>
=
Is paper
thickness
0.19 m m ?
YES YES
M ode 0
M ode 2
>
=
Is paper
thickness
0.19 m m ?
B lack color print?
YES
M ode 2
YES
C opy 2 m ode? M ode 3
M ode 2 M ode 2M ode 2
YES
M ode 0
M ode 1
NO
B lack color print?
>
=
Is paper
thickness
0.19 m m ?
YES YES
M ode 0
NO
NO NO NO
NO
NO
P-D ow n :M eans thatthe line is the reprinted line afterthe pow ersupply voltage drops.Itis to prevent
the printhead and the printerm echanism from being driven underthe im proper pow er
supply voltage.
Figure 1-3. Printing Speed Selection Mode

Product Description
Rev. A 1-
7
1.3.2 Character Specifications and Control Codes
1.3.2.1 Coded Character Sets
 ASCII international and Legal international character sets *
USA France Germany UK
Denmark 1 Sweden Italy Spain 1
Japan Norway Denmark 2 Spain 2
Latin America Korea Legal
Note: The codes for the international and legal characters are as follows:
23H, 24H, 40H, 5BH, 5CH, 5DH, 5EH, 60H, 7BH, 7CH, 7DH, 7EH
 Standard version (11 character tables)
Italic table PC437 (US, Standard Europe)
PC850 (Multilingual) PC860 (Portuguese)
PC861 (Icelandic) PC863 (Canadian French)
PC865 (Nordic) Abicomp
BRASCII Roman 8
ISO Latin 1
 NLSP version (30 character tables)
Italic table PC 437 (US, Standard Europe)
PC 850 (Multilingual) PC 437 (Greek)
PC 852 (East Europe) PC 853 (Turkish)
PC 855 (Cyrillic)PC 860 PC 857 ( Turkish)
PC 866 (Russian) PC 869 (Greek)
MAZOAWIA (Poland) Code MJK (CSFR)
ISO 8559-7 (Latin, Greek) ISO Latin 1T (Turkish)
Bulgaria (Bulgaria) PC 864 (Arabic)
Estonia PC 774 (LST 1283:1933)
ISO 8859-2 PC 866 LAT. (Latvian)
PC 860 (Portuguese) PC 861 (Icelandic)
PC 865 (Nordic) PCAPTEC (Arabic)
PC 708 (Arabic) PC 720 (Arabic)
PCAR864 (Arabic) Hebrew7 *1
Hebrew8 *1PC862(Hebrew) *1
Note 1: Theses character tables are not selected in the SelecType mode.
1.3.2.2 Type Faces
 Bitmap fonts (10 type faces)
Roman Sans Serif Courier Prestige
Script Script C OCR B
Orator Orator S Draft
 Scalable fonts (4 type faces)
Roman Sans Serif Roman T Sans Serif H
 Bar-code fonts (8 type faces)
EAN 13 EAN-8 Interleaved 2 of 5 UPC-A
UPC-E Code 39 Code 128 POSTNET
1.3.2.3 Rendition
 ASCIIDouble-width Double-height Condensed
Bolded Double-strike Italics
Super/subscript Outlined Shadowed
Underlined (Single, Double, Single-broken, Double-broken line)
Strike-through (Single, Double, Single-broken, Double-broken line)
Over-scored (Single, Double, Single-broken, Double-broken line)

DLQ-3000+
Rev. A
1-8
1.3.2.4 Combination of character tables and typefaces
Table 1-4. Character Tables and Type Faces
Character Tables Bitmap Fonts Scalable Fonts
Standard
version *1Italic table
PC 437 (US Standard Europe)
PC 850 (Multilingual)
PC 860 (Portuguese))
PC 861 (Icelandic)
PC 863 (Canadian-French)
PC 865 (Nordic)
BRASCII
Abicomp
Roman 8
ISO Latin 1
EPSON Draft
EPSON Roman
EPSON Sans Serif
EPSON Courier
EPSON Prestige
EPSON Script
EPSON OCR-B
EPSON Orator
EPSON Orator-S
Epson Script C
EPSON Roman
EPSON Sans Serif
EPSON Roman T
EPSON Sans Serif H
NLSP
version *1Italic table PC 437 (US Standard Europe)
PC 850 (Multilingual)
PC 860 (Portuguese)
PC861 (Icelandic)
PC 865 (Nordic)
EPSON Draft
EPSON Roman
EPSON Sans Serif
EPSON Courier
EPSON Prestige
EPSON Script
EPSON OCR-B
EPSON Orator
EPSON Orator-S
Epson Script C
EPSON Roman
EPSON Sans Serif
EPSON Roman T
EPSON Sans Serif H
PC 864 (Arabic) EPSON Draft
EPSON Roman (Not supported)
PC 437 (Greek)
PC 852 (East Europe)
PC 853 (Turkish)
PC 855 (Cyrillic)
PC 857 (Turkish)
PC 866 (Russian)
PC 869 (Greek)
MAZOWIA (Poland)
Code MJK (CSFR)
ISO 8859-7 (Latin/Greek)
ISO Latin 1T (Turkish)
Bulgaria (Bulgaria)
Estonia
PC 774 (LST 1283:1993)
ISO 8859-2
PC 866 LAT. (Latvian)
EPSON Draft
EPSON Roman
EPSON Sans Serif
EPSON Courier
EPSON Prestige
EPSON Script
(Not supported)
PCAPTEC (Arabic)
PC 708 (Arabic)
PC 720 (Arabic)
PCAR864 (Arabic)
EPSON Draft (Arabic)
EPSON Naskh
(Roman)
EPSON Kufi (Sans Serif)
(Not supported)
Hebrew7 *2
Hebrew8 *2
PC862(Hebrew) *2
EPSON Draft (Hebrew)
EPSON Miriam (Roman)
EPSON David (Courier)
(Not supported)
Note:
1: ESC R command is effective on the character tables with bold weight.
2: These character tables are not selected in the SelecType mode.

Product Description
Rev. A 1-
9
1.3.2.5 Memory Size
 Input buffer 128 K byte or 1k byte
 Download memory Approximately 10 K byte
 CG ROM NLSP Version: 8 M bit, Standard Version: 4 M bit
1.3.2.6 Character Size
 Character size
• Bit map font 10.5 point
• Scalable font 10.5 point
 Character matrixes See Table 1-5.
Table 1-5. Character Matrixes
Character Horizontal Dots Vertical Dots
Draft 10 cpi 12 24
Draft 12 cpi 10 24
Draft 15 cpi 8 16
LQ 10 cpi 36 24
LQ 12 cpi 30 24
LQ 15 cpi 24 16
LQ proportional 48 (maximum) 24
Notes:
1. The character matrixes for high speed draft 10 cpi characters are made from the draft
12 cpi matrixes.
2. The character matrixes for 15 cpi character are also used for superscript and
subscript characters.
1.3.2.7 Control Codes
 ESC/P2
 IBM 2391 Plus Emulation

DLQ-3000+
Rev. A
1-10
1.3.3 Paper Feed Specification
1.3.3.1 Friction Feed (Cut sheet)
 Paper Path
• Single sheet, envelopes Front and rear insertion (Manual/CSF insertion)
• Multi-part form Rear entry (Manual/CSF insertion)
Notes:
1. Set the release lever to “FRICTION”.
2. Do not load continuous paper (including folding paper).
3. Set the longer side of the envelope horizontally.
4. When setting No.6 envelope, align the left sheet edge guide with the marked position.
1.3.3.2 Tractor Feed (Continuous paper)
 Paper Path
• Rear entry push tractor feed with paper parking function
Notes:
1. Set the release lever to “TRACTOR”.
2. Do not perform reverse feed for more than 1/6 inch.
3. Set the left and right sheet edge guides to the right and left ends of the front paper
guide, respectively.
1.3.3.3 Paper Feed Speed and Accuracy
 Minimum feed length 1/360 inch (1/6, 1/8 or programmable with the
increment of 1/360 inch)
 Feed speed
• 1/6 inch line feed 42 ms
• Continuous feed 6.0 IPS (inch/second)
0.152 MPS (m/second)

Product Description
Rev. A 1-11
1.3.4 Paper Specification

Cut sheet (Single sheet)
Table 1-6. Cut sheet Specification : Single Sheet
Minimum Maximum
Width Manual insertion 3.6 inch
92 mm 16.5 inch 420 mm
CSF 3.9 inch
100 mm 16.5 inch 420 mm
Length Manual insertion 3.5 inch
92 mm 16.5 inch 420 mm
CSF 3.6 inch
92 mm 14.3 inch 364 mm
Thickness 0.0025 inch
0.065 mm 0.0047 inch 0.12 mm
Weight 52 g/m²
14 lb. 105 g/m² 27 lb.
Quality Plain paper, Reclaimed paper
Notes:
1. Reclaimed paper can be used under condition of room temperatures only.
2. Ensure that the paper is not curled, folded or crumpled.

Cut sheet (Multi-part form)
Table 1-7. Cut sheet Specification : Multi-part Form
Minimum Maximum
Width Manual insertion 3.6 inch
92 mm 16.5 inch 420 mm
CSF 3.9 inch
100 mm 16.5 inch 420 mm
Length Manual insertion 3.5 inch
92 mm 16.5 inch 420 mm *1
CSF 3.6 inch
92 mm 14.3 inch 364 mm *1
Copies 1 original and 6 copies
Thickness 0.0047 inch
0.12 mm 0.021 inch 0.53 mm
Weight
(I sheet of a multi-part form) 40 g/m²
11 lb. 58 g/m² 15 lb.
Quality Carbon-less multi-part paper
Jointing Line glue (top, right and left side)
Notes:
1. Ensure that the paper is not curled, folded or crumpled.
2. The maximum length for the carbon-less multi-part paper is 297 mm with the left or
right side of the form line-glued.
3. CSF does not feed paper which is glued by the right or left side.

DLQ-3000+
Rev. A
1-12
 Envelopes
Table 1-8. Envelope Specification
Minimum Maximum
Envelopes (No.6) Width 6.5 inch/165 mm
Length 3.6 inch/92 mm
Envelopes (No.10) Width 9.5 inch/241 mm
Length 4.1 inch/105 mm
Thickness 0.0063 inch
0.16 mm 0.021 inch 0.52 mm
Weight 45 g/m²
12 lb. /m² 91 g/m² 24 lb./m²
Quality Bond paper, Plain paper
Airmail paper without glue at a flap
Notes:
1. Fold the flap of the envelope inside before loading at CSF or manual insertion.
2. Difference in thickness within the same printable area must be 0.0098 inch or less.