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EPSON TERMINAL PRINTER
LX-1050+
SERVICE MANUAL
EPSON
4003283
,' ,,
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 theaccuracyof the contents of this manuaI. 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
-i-
PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1) personal inju~ 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.
WARNING
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.
- ii -
PREFACE
This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair
of LX-105O+.
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. 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. ADJUSTMENTS
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.
- iv -
REVISION SHEET
Revision Issue Date Revision Page
Rev. A May 18, 1994 1st issue
-v-
TABLE OF CONTENTS
CHAPTER 1. GENERAL DESCRIPTION
CHAPTER 2. OPERATING PRINCIPLES
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
CHAPTER 4. ADJUSTMENTS
CHAPTER 5. TROUBLESHOOTING
CHAPTER 6. MAINTENANCE
APPENDIX
- vi -
Chapter 1 General Description
Table of Contents
1.1 FEATURES 1-1
1.2 SPECIFICATIONS 1-3
1.2.1 Printing Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1.2.2 Paper Handling Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1.2.3 Paper Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1.2.4 Ink Ribbon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1.2.5 Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1.2.6 Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1.2.7 Reliability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1.2.8 Safety Approval. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1.2.9 Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1.3 INTERFACE OVERVIEW 1-8
1.3.1 Parallel Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
1.3.2 Optional Interface #8143. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
1.4 PRINTER OPERATIONS 1-1o
1.4.1 Control Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
1.4.2 SelecType Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
1.4.3 MicroAdjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
1.4.4 Panel Operational Power ON....... . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
1.4.5 DIP Switch Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
1.4.6 Buzzer Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
1.4.7 EEPROM Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
1.5 MAIN COMPONENTS 1-15
1.5.1 TAMA Main Control Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
1.5.2 TAa Filter Unit... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
1.5.3 Printer Mechanism (M-3D60). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
List of Figures
Figure 1-1. Exterior View of the LX-105O+. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Figure l-2. Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Figure 1-3. Printable Area - Cut Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Figure l-4. PrintableArea -Continuous Paper. . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Figure l-5. Adjust Lever Position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Figure l-6. Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Figure l-7. Control Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Figure l-8. TAMA Board Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Figure 1-9. TAa Filter Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
Figure 1-11. Printer Mechanism (M-3D60) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
List of Tables
Table 1-1. Options for LX-105O+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Table 1-2. Print Speed and Printable Columns . . . . . . . . . . . . . . . . . . . . . . . . . l-s
Table l-3. CharacterTables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-A
Table -4. Adjust Lever Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Table -5. Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Table -6. Connector PinAssignments and Signal Functions. . . . . . . . . . . . . . 1-8
Table -7. Settings for DIP Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Table -8. International Character Set Selection . . . . . . . . . . . . . . . . . . . . . . . 1-12
Table -9. Character Table Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Table -lO. Page Length Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
LX-105O+ Service Manual General Description
1.1 FEATURES
The LX-105O+ is a small, light-weight, low-cost, advanced paper handling printer. Its main features
are:
The LX-105O+ has four versions. Different parts are Program ROM version only.
Standard version: ROM version SOxxxx
India version: ROM version Slxxxx
Russian version: ROM version S2XXXX
Latin version: ROM version S3xxxx
South Europe version: ROM version S4xxxx
c1 Command compatible with following printers.
Standard, Latin, and South Europe version: with LX-105O
Russian and India version: with FX-1OOO
Q Printing speeds:
200 cps (draft 10 cpi)
240 cps (draft 12 cpi)
40 cps (NLQ 10 cpi)
48 cps (NLQ 12 cpi)
Ci PC table support as follows.
Standard version: Italic, PC437, PC850, PC860, PC863, PC865
India version: Italic, PC437
Russian version: Italic, PC437, PC866, PC855, Bulgaria
Latin version: Italic, PC437, PC852, MAZOVIA, codeMJK
South Europe version: Italic, PC437, PC857, 1S0 Latin IT, PC437 Greek, PC869, 1S0 8859-7
c1 Two built-in NLQ (Near Letter Quality) fonts (Roman and Saris Serif)
c1 Input buffer size is as follows.
Standard, Latin, and South Europe version: 4Kbytes
Russian and India version: IK bytes
L1 Optional EPSON TYPE-A interface
Figure 1-1 shows the an exterior view of the LX-105O+.
edge guides
`aperguideSp.per-re,e.e lever
vaver-tension unit
/ P
control panel
P
AC i n l e t '
/
power switch
Figure 1-1. Exterior View of the LX-105O+
Rev. A 1-1
General Description LX-105O+ Service Manual
Table 1-1 lists the optional units available for the LX-1050+.
Table 1-1. Options for LX-105O+
Cat. No. Description
8143 New Serial Interface Board
C82302*/C82304* 32KB Serial Interface
C82303* 32KB Parallel Interface
8165 IEEE-488 Interface Board
C80624* Single Bin Cut Sheet Feeder
i C80014* [ PullTractorUnit
8755 Ribbon Cartridge
1-2 Rev. A
LX-105O+ Service Manual General Description
1.2 SPECIFICATIONS
This section provides detailed statistics for this printer.
1.2.1 Printing Specification
Printing Method: Serial, impact, dot matrix
Pin Configuration: 9 wires (diameter 0.29rnm)
#1
#2
#3
#4
#5
b
&--=- I
0.29 mm
0.35 mm(l/72")
#8
#7
#8
#9
Figure 1-2. Pin Configuration
Print direction: Bi-directional printing with logical seeking (Text mode)
Uni-directional (left to right) printing (Bit image mode)
Print speed: See Table 1-2.
Printable columns See Table 1-2.
Table 1-2. Print Speed and Printable Columns
Type of Letters Printable Columns Print Speed
Pica (10 cpi) 136 200 Cps
Elite (12 cpi) 163 240 CpS
Double-width pica 68 100 Cps
Emphasized pica 136 100 Cps
Double-width emphasized pica 68 50 Cps
Condensed pica (17 cpi) 233 171 Cps
Double-width condensed pica (17 cpi) 115 86 Cps
Double-width elite 81 120 Cps
Condensed elite (20 cpi) 272 200 Cps
NLQ pica (1 O cpi) 136 40 Cps
NLQ elite (12 cpi) 163 48 CpS
Rev. A 1-3
General Description LX-105O+ Service Manual
lot matrix format: 9 X 9 Text mode (Draft)
18X 20 Text mode (NLQ
Ytaracter sets: 13 international character sets
~haracter tables: See Table 1-3.
Table 1-3. Character Tables
SW)ck[d India l?~su~ln Latin South
Character Table Model Model E$;mg~
ITALIC o 0 0 0 0
PC437 (US/ Standard Europe) o 0 0 0 0
PC850 (Multilingual) o x x x x
PC860 (Portuguese) o x x x x
PC863 (Canadian-French) o x x x x
PC865 (Nordic) o x x x x
PC866 (Russian) x x o x x
PC855 (Cyrillic) x x o x x
PC852 (East Europe) x x x o x
PC857 (Turkish) x x x x o
PC437 Greek x x x x o
PC869 (Greek) x x x x o
Bulgaria x x o x x
MAZOVIA (Poland) x x x o x
Code MJK (CSFR) x x x o x
ISO Latin IT (Turkish) x x x x o
ISO 8859-7 (LatitiGreek) x x x x o
Font: Draft, NLQ Roman, NLQ Saris Serif
Control code: Esc/P-81
Standard, Latin, and South Europe model compatible with LX-105O
India and Russian model compatible with FX-1OOO (except IBM
mode)
Input buffer: Standard, Latin, and South Europe model: 4K bytes
India and Russian model: IK bytes
1-4 Rev. A
LX-105O+ Service Manual General Description
1.2.2 Paper Handling Specification
Line spacing: 1/6 inch or 1/8 inch, or programmable in units of 1/216 inch
Line feed speed: Approximately 95 ms (1/6 inch line feed)
Approximately 75 ms (1/6 inch in page feed)
Paper feed method: Friction feed
Tractor feed (push tractor: standard, pull tractor: optional)
Paper insertion: Rear
1.2.3 Paper Specification
Useable paper:
Width: 182 to 364 mm (4 to 14.3 inch)
Length: 182 to 364 mm (4 to 14.3 inch)
Thickness: 0.065 to 0.14 mm (0.0025 to 0.055 inch)
Weight: 45 to 78 Kg (14 to 24 lb)
Width: 101 to 406.4 mm (4 to 16 inch)
Copies: 3 sheets (1 original 2 copies)
Total thickness: 0.065 to 0.25 mm (0.0025 to 0.010 inch)
Weight: 45 to 70 Kg (14 to 22 lb)
34 to 50 Kg (12 to 15 lb)-- copy paper
Size: No. 6 (166X 92 mm), No.1O (240X 104 mm)
Total thickness: 0.16 to 0.52 mm (0.0063 to 0.0197 inch)
Weight: 39 to 78 Kg (12 to 24 lb)
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