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EPSON TERM NAL PR NTER
DLQ"3000
SERVICE MANUAL
EPSON
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 toerwuretheaccuracyof 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 consequence thereof.
Epson and Epson ESC/P are registered trademark of Seiko Epson Corporation.
General Notice: Other product names used herein are for identication purposes only and maybe
trademarks of their respective campanies.
@Copyright 1994 by SEIKO EPSON CORPORATION Nagano, Japan
PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1) personal injury and 2)
damage to equipment.
DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury.
Great caution should be exercised in performing procedures preceded by DANGER
Headings.
WARNING 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.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND
PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCE-
DURE.
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.
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON
CERTIFIED REPAIR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLT-
AGE, 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 the precautions on the preceding page. The chapters are organized as
follows:
CHAPTER 1. PRODUCT 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 adjustment.
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 Issue Date Revision Page
Rev. A June 1,1994 1st issue
REV.B November 22,1994 2nd issue
TABLE OF CONTENTS
CHAPTER 1. PRODUCT DESCRIPTION
CHAPTER 2. OPERATING PRINCIPLES
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
CHAPTER 4. ADJUSTMENT
CHAPTER 5. TROUBLESHOOTING
CHAPTER 6. MAINTENANCE
APPENDIX
CHAPTER 1 Product Description
Table of Contents
1.1 FEATURES 1-1
1.2 SPECIFICATIONS 1-2
1.2.1 Hardware Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.2.1.1 Paper Handling Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.2.1.2 Paper Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.2.1.3 Ribbon Catiridge Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1.2.1.4 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1.2.1.5 Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1.2.1.6 Reliability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1.2.1.7 Safety Approvals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1.2.1.8 Physical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1.2.2 Firmware Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1.3 INTERFACE OVERVIEW 1-1o
1.3.1 Parallel Interface Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-lo
1.3.2 Serial Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
1.3.3 Optional Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
1.3.4 Interface Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
1.3.5 Prevention Host from Data TransferTimeout . . . . . . . . . . . . . . . . . . . . 1-14
1.4 OPERATING INSTRUCTIONS 1-15
1.4.1 Control Panel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
1.4.2 Printer Stateand LCD/LED Indication . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
1.4.3 Self-test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
1.4.4 Hexadecimal Dump Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
1.4.5 Setting Print . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18
1.4.6 SelecType Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
1.4.6.1 SelecType Phase Transitions . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
1.4.6.2 SelecTypel and20perations. . . . . . . . . . . . . . . . . . . . . . . . . 1-19
1.4.6.3 Font and Pitch Selection Operations . . . . . . . . . . . . . . . . . . . . . 1-20
1.4.7 Program Reload Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
1.4.7.1 Reprogramming Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
1.4.7.2 Bootstrap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
1.4.8 PrinterStatus and Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
1.4.9 Printer Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
1.4.9.1 Power-on Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
1.4.9.2 Hardware Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
1.4.9.3 Software Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
1.4.9.4 SelecType initialization.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
1.4.10 Default Settings.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
1.5 MAIN COMPONENTS 1-23
1.5.1 BOARD ASSY., C124 MAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
1.5.2 BOARD ASSY., C124 PSB/PSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
1.5.3 Printer Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
1.5.4 Housing Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
List of Figures
Figure -1. Exterior View of the DLQ-3000. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Figure -2. Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Figure -3. Printable Area for Cut Sheet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Figure -4. Printable AreaforContinuous Paper. . . . . . . . . . . . . . . . . . . . . . . . 1-5
Figure -5. Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Figure -6. Handshaking for RS-232C Interface. . . . . . . . . . . . . . . . . . . . . . . 1-12
Figure -7. Serial Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Figure -8. Panel Appearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Figure -9. SelecType Phase Transitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
Figure -10. Bootstrap Program Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
Figure -11. BOARD ASSY., C124 MAIN. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
Figure -12. BOARD ASSY., C124 PSB/PSE. . . . . . . . . . . . . . . . . . . . . . . . . 1-23
Figure -13. Printer Mechanism (M-5 L60). . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
Figure -14. Housing Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
List of Tables
Table l-1. Optional Units.... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Table l-2. Paper Thickness Lever. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Table l-3. Cut Sheet Paper (Single Sheet) Specifications . . . . . . . . . . . . . . . . 1-3
Table l-4. Cut Sheet Paper(Multi-part) Specifications . . . . . . . . . . . . . . . . . . . 1-3
Table l-5. Envelope Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Table l-6. Continuous Paper(Single Sheet and Multi-part) Specifications. . . . 1-4
Table l-7. Continuous Paperwith Labels Specifications. . . . . . . . . . . . . . . . . . 1-4
Table l-8. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Table 1-9. Printing Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Table l-10. Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Table l-11. Signal and Connector Pin Assignments for Parallel interface . . . 1-11
Table 1-12. Serial Interface Handshaking. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Table l-13. Signal and Connector Pin Assignments for Serial interface. . . . . 1-13
Table l-14. Paper Feeding Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
Table l-15. Printer Stateand LCD/LED Indication . . . . . . . . . . . . . . . . . . . . . 1-17
Table l-16. Initialize Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22
Product Description
DLQ-3000 Service Manual
1.1 FEATURES
The DLQ-3000 is 24-pin serial dot-matrix and flat-bed type impact printer. The main features are:
Optional color printing using the optional color ribbon (black, magenta, cyan, yellow).
Use of ESC/P2 control codes
Printing speed
10 cpi LQ character: 120 Cps
10 cpi draft: 360 CPS
10 cpi High speed draft: 444 Cps
Copy capacity
Up to 5 copies plus an original can be printed.
High speed loading
1.5 second to load a sheet from cut sheet feeder.
No DIP-switches to set
14 international and legal character sets.
8 character tables (standard model)
14 character tables (consolidated model)
4 scalable fonts, 9 bitmap LQ fonts and 2 draft fonts.
Figure 1-1 shows an exterior view of the DLQ-3000 and Table 1-1 lists the optional units available
for the DLQ-3000.
printer cover
\
paper-thickness
rol
I
w
"L
papel `ball
paper-release
lever
right edge guide front paperguide /
sprocke~ unit \ \ Y
serial Interface
Figure 1-1. Exterior View of the DLQ-3000
Table 1-1. Optional Units
I Model I Description I
I C80630*
I
Cut Sheet Feeder
1
I S01 5066 I Ribbon Cartridge (Black)
, I
I S015067 I Ribbon Cartridge (Color)
I
S015068 I Film Ribbon Cartridge (Black) I
*: The last digit vanes by country.
Product Descri~tion DLQ-3UO0 Service Manual
1.2 SPECIFICATIONS
This section provides detailed information about the DLQ-3000.
1.2.1 Hardware Specifications
Printing method: Serial impact dot matrix
Pin configuration: 24 wires
Pin diameter: 0.0079 inch (0.2 mm)
0.86 mm=l/30''+l/2160"
6x0.023mm(=l-1080") ~ I j ~ I ~6x0.023mm(=14080")
.
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