Epson LX-1050+ User Manual

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

General Notice: Other product names used herein are for

ESC/P

are registered trademark of Seiko Epson Corporation.

identication

purposes only and maybe

trademarks of their respective campanies.

SEIKO EPSON CORPORATION

Nagano, Japan

-i-

PRECAUTIONS

Precautionary notations throughout the text are categorized relative to 1) personal damage to equipment.

DANGER

WARNING

The precautionary measures itemized below should always be observed when performing repair/ maintenance procedures.

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.

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

inju~

and 2)

DANGER

ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE.

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.

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

REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN.

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.

ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM

THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.

IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.

REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS

BY THE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY.

ICS

OR OTHER

- 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

Rev.

May 18, 1994

Revision Page

1st

issue

-v-

CHAPTER 1. CHAPTER 2. CHAPTER 3. CHAPTER 4. CHAPTER 5. CHAPTER 6.

APPENDIX

GENERAL DESCRIPTION OPERATING PRINCIPLES DISASSEMBLY AND ASSEMBLY ADJUSTMENTS TROUBLESHOOTING MAINTENANCE

- vi -

Chapter 1

General Description

Table of Contents

FEATURES

1.1

1.2 SPECIFICATIONS

1.2.1

1.2.2

1.2.3

1.2.4

1.2.5

1.2.6

1.2.7

1.2.8

1.2.9

1.3 INTERFACE OVERVIEW

1.3.1 Parallel Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

1.3.2 Optional Interface #8143. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

1.4 PRINTER OPERATIONS

1.4.1

1.4.2

1.4.3

1.4.4

1.4.5

1.4.6

1.4.7

Printing Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Paper Handling Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Paper Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Ink Ribbon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Reliability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Safety Approval. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Control Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

SelecType Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

MicroAdjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Panel Operational Power ON....... . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

DIP Switch Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Buzzer Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

EEPROM Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

1-1

1-3 1-3

1-5 1-5 1-7 1-7

1-7

1-7 1-7 1-7

1-8

1-1o

1.5 MAIN COMPONENTS

1.5.1 TAMA Main Control Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.5.2

1.5.3 Printer Mechanism

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. Figure 1-9. Figure 1-11. Printer Mechanism

TAa Filter Unit... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

(M-3D60). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

List

TAMA Board Component Layout . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

TAa Filter Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

of Figures

(M-3D60) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

1-15

List of Tables

Table 1-1. Options for

Table 1-2. Print Speed and Printable Columns . . . . . . . . . . . . . . . . . . . . . . . . .

Table l-3.

Table Table Table Table Table Table Table

CharacterTables.

-4. Adjust Lever Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

-5. Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

-6. Connector PinAssignments and Signal Functions. . . . . . . . . . . . . . 1-8

-7. Settings

for DIP Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

-8. International Character Set Selection . . . . . . . . . . . . . . . . . . . . . . . 1-12

-9. Character Table Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

-lO. Page Length Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LX-105O+

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

l-s I-A

1-6 1-7

1-13 1-13

LX-105O+

Service Manual

1.1 FEATURES

The

LX-105O+

are:

The LX-105O+ has

Standard version:

India version: Russian version: Latin version: South Europe version:

Command compatible with following printers. Standard, Latin, and South Europe version: with Russian and India version:

Printing speeds: 200 240 40 48

PC table support as follows. Standard version: India version: Russian version: Latin version: South Europe version:

Two built-in

c1 c1

Input buffer size is as follows. Standard, Latin, and South Europe version: 4Kbytes

Russian and India version:

Optional EPSON TYPE-A interface

is a small, light-weight, low-cost, advanced paper handling printer. Its main features

versions. Different parts are Program ROM version only.

four

ROM version SOxxxx ROM version Slxxxx

cps

(draft 10

cps

(draft 12

cps (NLQ cps (NLQ

ROM version S2 ROM version S3xxxx ROM version S4xxxx

cpi) cpi)

cpi)

Italic,

PC437, PC850, PC860, PC863,

Italic,

PC437

Italic,

PC437, PC866, PC855,

Italic,

PC437, PC852,

Italic,

PC437, PC857,

NLQ

(Near Letter Quality) fonts (Roman and Saris Serif)

XXXX

with FX-1OOO

MAZOVIA, codeMJK

1S0 Latin IT,

IK bytes

LX-105O

Bulgaria

PC865

PC437

Greek,

General Description

PC869,

1S0 8859-7

Figure 1-1 shows the an exterior view of the

edge guides

‘aperguideSp.per-re,e.e

control panel

LX-105O+.

lever

AC inlet’

vaver-tension

power switch

unit

Rev.

Figure 1-1. Exterior View of the

LX-105O+

1-1

General Description

Table

1-1

lists the optional units available

for the LX-1050+.

LX-105O+

Service Manual

Table 1-1. Options for

Cat. No. Description

8143 New Serial Interface Board C82302*/C82304* C82303* 8165 C80624* Single Bin Cut Sheet Feeder

i C80014*

8755

32KB Serial Interface 32KB Parallel Interface

IEEE-488 Interface Board

[

PullTractorUnit

Ribbon Cartridge

LX-105O+

1-2

Rev. A

LX-105O+ Service Manual

1.2 SPECIFICATIONS

This section provides detailed statistics for this printer.

1.2.1 Printing Specification

General Description

Printing Method: Pin Configuration: 9 wires (diameter 0.29rnm)

Serial, impact, dot matrix

0.29

0.35

mm(l/72”)

&--=-

#8 #7

#8 #9

Figure 1-2.

Pin Configuration

Print direction:

Print speed: Printable columns

Bi-directional Uni-directional

See Table 1-2. See Table 1-2.

Table 1-2. Print Speed and Printable Columns

Type of Letters

Pica (10 Elite (12 Double-width pica

Emphasized pica Double-width emphasized pica Condensed pica (17 Double-width condensed pica (17 Double-width elite

cpi) cpi)

cpi)

printing with logical seeking (Text mode)

(left to right) printing (Bit image mode)

Printable Columns

136 163

136

68 233 115

Print Speed

200

Cps

240

CpS

100

Cps

100

Cps

171

Cps

120

Cps

Condensed elite (20

NLQ

Rev.

pica (1 O

elite (12

cpi)

272 136 163

200

Cps

CpS

1-3

General Description

lot matrix format:

Ytaracter ~haracter

sets:

tables:

9 X 9

Text mode (Draft)

18X 20 Text mode

(NLQ

13 international character sets See Table 1-3.

Table 1-3. Character Tables

LX-105O+

Service Manual

Character Table

ITALIC

PC437

(US/ Standard Europe)

PC850

(Multilingual)

PC860

(Portuguese)

PC863

(Canadian-French)

PC865

(Nordic)

PC866

(Russian)

PC855 (Cyrillic) PC852

(East Europe)

PC857

(Turkish)

PC437

Greek

PC869

(Greek)

SW)ck[d

o o o o o o x x x x x x x x x x x x x x x

India

Model Model

0 0 0 0 0 0

x x

x x x x x

l?~su~ln

x x o o

x x x x

Latin

x x

x x o x

South

E$;mg~

0 0

x x x x x x

o o

Bulgaria MAZOVIA (Poland) Code MJK

ISO

Latin IT (Turkish)

ISO

8859-7

(CSFR)

(LatitiGreek)

Font: Control code:

Input buffer:

x x

Saris Serif

o x x x x

x x

x o x o x

Draft,

NLQ

x x x x

x x

Roman,

NLQ

Esc/P-81

Standard, Latin, and South Europe model compatible with

LX-105O

India and Russian model compatible with FX-1OOO (except IBM mode)

Standard, Latin, and South Europe model: 4K bytes India and Russian model: IK bytes

1-4

Rev. A

LX-105O+ Service Manual

1.2.2

Paper Handling Specification

General Description

Line spacing: Line feed speed:

Paper feed method:

Paper insertion:

1.2.3 Paper

Useable paper:

<Continuous

<Label>

Printing

Area:

Specification

paper>

22 mm min. Note 1

mm min.

1/6 inch or 1/8 inch, or Approximately 95 ms (1/6 inch line feed)

Approximately 75 ms (1/6 inch in page feed) Friction feed

Tractor feed (push tractor: standard, pull tractor: optional) Rear

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)

Size: 63.5 X23.8 mm (2.5 inch X 15/16 inch) Cut sheet

—

Printable area

progr

ammable in units of 1/216 inch

mm min.

t--i

—

Notes:

Rev.

22 mm min.

Note 2

Figure 1-3. Printable Area - Cut Sheet

1. In the

2. In the area from 13.5 mm to 22mm from the bottom of the paper, itisptintable but

area from

is not assured.

paper-feed is not assured.

8.5

to22mm

from the top ofpapec itisprintable butpaper-feed

1-s

General Description

LX-105O+ Service Manual

Continuous paper

13 mm min.

Figure 1-4. Printable Area - Continuous Paper

Adjust lever settings

345.4

mm max.

➤

4---D

13 mm min.

Printable area

0 0 0

.————————————

0 0 0

The adjust lever must be set to the proper position for the paper

thickness.

o 0 0 0

0 0

Table

Lever position

2nd step

1-4. Adjust Lever Settings

Paper Thickness

0.06 to 0.18 mm

0.19 to 0.25

2’nd position

4’th position

3rd step

1-6

Figure 1-5. Adjust Lever Position

Rev.

LX-105O+

Service

Manual

1.2.4 Ink Ribbon

General Description

Type: Color:

Reliability:

#8755 Ribbon Cartridge Black 3 million characters at 14 dots/character

1.2.5 Environmental Conditions

Temperature:

Humidity:

Resistance to shock:

Resistance to vibration:

-30 to60“C - Storage

5to35“C - Operation 5 to 85

10to801%0 2 G, 1 ms - Storage

1 G, 1 ms - Operation

0.50 G (55 Hz max.) - Storage

0.25 G (55 Hz max.) - Operation

YO RH

1.2.6 Electrical Specifications Table 1-5. Electrical Specifications

Rated voltage Input voltage range Rated frequency range Input frequency range

Power consumption

Insulation resistance

Item

(between AC line and chassis)

120V Version

103.5

49.5 to 60.5 Hz

Approx. 28W

(Self test in draft 10

(no

condensation) - Storage

(no

condensation) - Operation

120 V AC

to 132V

50 to 60 Hz

M(2,

min.

cpi)

220-

240V

I 1

(between AC line and chassis)

220-

49.5 to 60.5 Hz

Approx. 28W

(Self test in draft 10

Version

240V

198 to 264V

50 to 60 Hz

MQ,

min.

cpi)

Dielectric strength

AC 1000 V

or AC 1200 V

1.2.7 Reliability

MCBF:

MTBF:

Life of

Printhead:

3 million lines (except 6000 POH 200 million strokes/wire

1.2.8 Safety Approval

Safety Standards:

RFI:

UL4785th(U.S. version) CSA22.2 #220. (U.S. version)

VDE

0806

VfR.243 (VDE E~550~ (CISPR P~b.22) ~lass

1.2.9 Physical Specifications

Dimensions

Weight

619.3 mm (Width) excluding knobs

8.80 Kg

rms

1 minute

rms

1 second

printhead)

(TIN)

(European version)

0878

Part

x 339 mm

Part

30) B”

(Depth) x 141

1250

rms

or AC 1500 V

mm(Height),

1 minute

rms

1 second

Rev.

General Description

1.3 INTERFACE OVERVIEW

The

LX-105O+

■

is equipped with the following external interfaces;

Centronics parallel interface Optional Type A interface

LX-105O+

Service Manual

1.3.1

Parallel InterFace

Data Format

Synchronization

Handshaking

Signal Level

Adaptable Connector Table 1-6 shows the

BUSY

ACKNLG

DATA

STROBE

comector

8-bit parallel By STROBE pulse By BUSY and

ACKNLG

signal Ill-compatible 57-30360

(arnphanol)

or equivalent

pin assignments and signal functions of the parallel interface.

5ps.

min.

5ps.

5w.

min.

7p.a. approx. 5ps. approx.

Pin No.

2-9

Figure

Table 1-6. Connector Pin Assignments and Signal Functions

Signal Name

STROBE

1-6. Data Transmission

1/0

The STROBE pulse is used to read data from the host

computer. The pulse width must be

Normally, it is HIGH, and data is latched with rising

Timing

Description

0.5p.s

edge of this signal. DATA 1-8 are parallel data bits. When one of these

signals is HIGH, the data bits is 1; when LOW, the data bits is O. The most significant bit ( MSB) is data 8. The

DATA 1-8

signal state must be maintained for

0.5ps

on either side

of STROBE signal’s active edge.

ACKNLG

approximately 10P.s. This signal goes LOW upon the

completion of data reception, to indicates that the printer

is an acknowledge pulse with a width of

is ready to receive further data.

The BUSY signal informs the host computer of the

BUSY

printer’s status. When this signal is HIGH, the printer cannot accept further data.

or more.

1-8

Rev. A

LX-105O+

Sewice Manual

General Description

Table 1-6. Connector Pin Assignments

—. . .

Pin No.

15 16 17 18

19-30

Signal Name

SLCT

AUTO FEED XT

GND Signal ground

CHASSIS

GND

GND Twisted-pair return signal ground.

INIT

1/0

o o

This signal indicates whether paper is available in the printer or not. A HIGH level indicates a no paper condition.

pulled up to +5V though

If this signal is set to LOW, the printer automatically performs one line feed upon receipt of a CR (carriage return) code.

Not

USSd.

Chassis ground. Not

USSd.

If this signal goes LOW, the printer is initialized. The pulse width of this signal must be

. -. . — . .

and

Signal Functions (Cont.)

Description

3.3KQ

resistor in the

50p.s

or more.

.- . .

print,er.

ERROR

GND Signal ground.

35 +5V

Notes:

A// interface conditions are based on must be

The AUTO FEED-XT signal can be set LOW by DIP The SELECT IN signal can be set LOW by jumper 1.

/ess than

0.2 p.s.

SLCT

1.3.2 Optional Interface #8143

The

LX-105O+

Tyep: Synchronization:

Protocol: Transfer speed:

can use the non-intelligent serial interface board #8143.

RS-232C

Asynchronous start-stop system

Start bit: 1 bit Stop bit: 1 bit or more Data length: 7 or 8 bits

Parity: X-ON/X-OFF or DTR control 75,110,134.5,150,200, 300,600,1200,1800,2400, 4800, and 9600

This signal goes LOW if the printer:

has a fatal error.

- runs out of paper.

- off line.

Not

Used

Pulled up to +5 V through 3.3

The

DC1/DC3

code is only valid when this signal is

HIGH.

7ZL

/eve/s. Both the rise

sw”tch

andfa//

2-4.

or current loop

Odd, Even or none

resistor in the printer.

times of all signals

Rev.

1-0

General Description

LX-105O+ Service Manual

1.4 PRINTER OPERATIONS

This section describes the basic operations of the printer.

1.4.1 Control Panel

The control panel of this printer contains four non-lock type push buttons and four LED indicators

for easy

[Buttons]

ope;ation

of the various printer function.

POWER

READY

PAPER

OUT

ON LINE

OFF LINE

ON LINE: FORM FEED:

LINE FEED:

LOAD/EJECT:

CONDENSED

LOAD/EJECT

OFf=

J J

I I

NLQ

ROMAN SANS SERIF J J J

FORM FEED

LINE FEED

Figure 1-7. Control Panel

Switches printer status between on line and offline.

When the

or to advance continuous paper to the top of the next page. When the printer is off line, press this button to advance the paper one line,

or hold it down to advance the paper continuously. This button is used to feed the paper to the loading position, or to eject paper

that is already loaded. Paper is ejected forward if the paper-release lever is set to the single-sheet position, or is ejected backward (removed from the paper path) if the release lever is set to the continuous paper position.

printer is off line, press this button to eject a single sheet of paper

[Indicators]

POWER:

READY:

PAPER OUT:

ON LINE:

1-10

On when the power switch is on and power is supplied. On when the printer is ready to accept input data. Flickers while data is

printed. On when the printer is out of paper or when continuous paper ia in a

standby position. The printer also beeps when it is out of paper.

On when the printer is on line and ready to accept data from the computer. When this indicator is blinking, the micro-adjustment feature can be used.

Rev.

LX-105O+ Service Manual

General Description

1.4.2

SelecType

selection of Draft, Roman, or Saris Serif fonts and selection of normal printing or condensed printing modes.

To select Roman or Saris Serif, press the pressed. When it sounds twice, the Roman font is selected. When it sounds three times, the Saris Serif font is selected.

To select the Draft font, press the DRAFT button. The buzzer will sound once, indicating that the

DRAFT

To set for condensed printing when the printer is in the print mode, press the CONDENSED button once (the buzzer will sound once), and the printer will enter the condensed print mode. To cancel condensed printing, press the CONDENSED button again. After you press the button, the buzzer sounds twice to tell you that condensed printing is canceled.

SelecType

allows the user to choose fonts and the printing mode easily. This function provides for

font is selected.

Functions

SelecType

is effective only when the printer is ON LINE and not printing.

NLQ

button. A buzzer sounds when the

NLQ

button is

1.4.3 Micro Adjustment

By pressing the FORM FEED or LINE FEED buttons immediately after loading paper or when using the tear-off feature, you can make tine adjustment to the loading and tear-off positions.

1.4.4 Panel Operation at Power ON

The following functions can be activated at power on by holding down the specified button on the control panel.

Self-test mode:

Hex Dump mode:

To begin printing the self-test in the Draft mode, turn the printer ON while pressing the LINE-FEED button. To begin printing the self-test using the

NLQ

mode (Near Letter Quality), press FORM FEED and hold it down, then turn the printer power ON. Self-test printing can be stopped or started by pressing ON-LINE (ON-LINE indicator is not lit). To finish the self-test, stop the printing by pressing the ON-LINE switch then turn OFF the printer power. The firmware revision number is printed as the first line of the self-test, and subsequently, current DIP switch settings are printed.

The printer enters the HEX-DUMP mode when it is powered on while the LINE-FEED and FORM-FEED buttons are pressed down. In the HEX-DUMP mode, the hexadecimal representation of the input data is printed out, along with corresponding ASCII characters. This function is valuable for checking the data the printer has received from the host. If input data is a control code rather than a character code, a period (.) is printed in the ASCII column.

Rev.

1-11

General Description

L.X-1050+

Service Manual

1.4.5 DIP Switch Settings

The two DIP switches are located on the side of the printer and function as shown in Tables 1-7

throum

the

1-10. Note

INIT signal.

that

the

status of the DIP switches is read only at power on or upon receipt of

Table 1-7. Settings for DIP Switch

SW No.

1-1

Character

Description

Pitch

cpi

OFF

Faoto~

Settings

OFF

1-2

Shape of Zero

1-3

1-4

1-5 I

1-6 1-7 1-8 ON

2-1 2-2

Page length

Tableselection

Character table selection

Short tear-off Invalid Cut sheet feeder control

2-3

Skip over perforation 1 inch

See Table 1-10.

Graphics

See Table

1-8

Valid

I I 1

2-4

AUTO FEED XT signal internally fixed or not

Fixd t. Low

Italics

or 1-9.

Valid Invalid None

Depends on external signal

OFF

Table 1-8. International Character Set Selection (DIP SW 1-5: OFF)

Sw 1-6 Sw 1-7 Sw 1-8

Country Sw

Sw 1-7 Sw 1-8 Country

OFF OFF

OFF

ON ON

OFF OFF OFF

OFF

ON ON ON ON ON ON

OFF ON Germany

ON I OFF

OFF

U.S.A

France

U.K.

OFF OFF

OFF

OFF I OFF I OFF I Spain

ON ON ON

OFF I ON

OFF Sweden

Denmark

Italy

1-12

Rev.

LX-105O+

Service

Manual

Table 1-9. Character Table Selection (DIP SW 1-5: ON)

General Description

1-6

Sw 1-7

ON ON ON ON ON ON ON

OFF ON ON

OFF OFF OFF

OFF

OFF ON

OFF

Sw 1-8

OFF

~:pj:;d

PC437 PC437 PC850 PC437 PC860 PC437

PC863 PC437

PC865 PC437

PC437 PC437

Table

1-10. Page Length Selection

India

version

:?:/::

PC437 PC866 PC869

Bulgaria

PC437 PC437 PC869

PC437 PC437 1S088597

PC437 PC437 PC437

Latin

Version

PC437 PC437 PC852 MAZOWIA

Code MJK PC437G.

South

Europe

Version

PC857

ISO Lat. IT

OFF

ON ON

OFF

12inch

8.5 inch

70/6

inch

Rev.

1-13

General Description

1.4.6 Buzzer Operation

The

buzzer sounds under the following conditions:

LX-105O+

Service Manual

BEL

code: Carriage trouble:

PaperQut:

Abnormal voltage: Incorrect

SRAM:

Incorrect RAMinside CPU: Recognition of panel

The buzzer sounds for 0.1 second when a Beeps 6 times, pausing briefly after 3rd beep. Beeps 20 times, pausing briefly after every 4 beeps.

Beeps 5 times, pausing after every beep. Beeps 8 times, pausing briefly after every 2 beeps. Beeps indefinitely until power OFF. Beeps 1 or 2 or 3 times in setting print mode.

operation: Factory setting:

Beeps once when the value under micro-adjusting is equal to the factory-set value.

Sheet ejection failure

(in

CSF

mode):

Illegal paper release/

unrelease:

Beeps 20 times, pausing briefly after every 4 beeps.

Beeps continuously when the paper release lever is changed when the paper is in the paper path.

Beeps until the lever is changed again or the paper is completely out of the path.

1.4.7

This printer has

EEPROM

Reset

EEPROM,

it memorized SelecType settings, position of continuous paper, and

bi-directional printing adjustment value.

main board replacement, The

EEPROM

is cleared, when the printer power on while FF and LOAD/EJECT switches are

EEPROM

replacement, or printer mechanism replacement.

pressed.

EEPROM

BEL

code is input.

reset operations are only required after the

1-14

Rev.

LX-105O+

Service Manual

1.5 MAIN COMPONENTS

Ganeral

Description

The main

components

of the

LX-105O+

printers are designed for easy removal and replacement to

maintain/repair the printers.

The main components are:

Cl TAMA

TAPNL-W control panel: Control panel.

TAa filter unit: Transformer and filter board.

D M-3D60:

board: Main control board. The CPU on this board controls all main functions.

Printer mechanism.

1.5.1 TAMA Main Control Board

The

TAMA

board is the main controller of this printer. It takes charge of interfacing with the host computer and processing of received print data, as well as control of the whole printer mechanism. This-board consists of the following components.

CPU

(2C):

Gate-array

Program ROM RAM

EEPROM

(3B):

(3C):

(3D):

(lC):

CR Motor driver (1A): SLA7020M

8-bit CPU (PPD781OHG) 15 MHz operation clock

E05A30 Includes the following functions:

- MMU (Memory Management Unit)

IFU

(Interface Control Unit)

- PCU (1/0 Port Control Unit)

- Head control unit

256

Kbit

EPROM or mask ROM

Kbit

PS RAM

256 bit

EEPROM

E05A30(3B)

“ PROM(3C)

“ RAM(3D)

CPU(2C)

EEPROM(l

SLA7020M(1A)

Figure 1-8. TAMA Board Component Layout

Rev.

1-15

General Description

TAa

1.5.2 The

TAa

Filter Unit

filter unit contains a power cord

(120V

Version) or AC inlet

switch, fuse filter circuit, and power transformer.

LX-105O+

(220/240V

Service Manual

Version), power

120V Version

Figure 1-9. TAa Filter Unit

1.5.3 Printer Mechanism (M-3D60)

The

M-3D60

components include:

Carriage motor Carriage mechanism Paper feed motor Paper feed mechanism Ribbon feed mechanism Printhead Sensors

printer mechanism was developed specifically for the

220/240V Version

LX-105O+

printer. Its

1-16

Figure 1-10. Printer Mechanism (M-3D60)

Rev. A

Chapter 2 Operating Principles

Table of Contents

2.1 OVERVIEW

2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM

2.2.1 Printhead Printing Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.2.2 Carriage Drive Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.2.2.1 Home Position Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.2.3 Paper Feed Mechanism Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.2.3.1 PaperEndSensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.2.3.2 Release Sensor.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.2.4 Ribbon Advance Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.3 OPERATING PRINCIPLES OF THE ELECTRICAL

2.3.1 Operating Principles of the Power Supply Circuit . . . . . . . . . . . . . . . . . . 2-8

2.3.2 Operating Principles of the Main Control Circuit . . . . . . . . . . . . . . . . . . . 2-9

2.3.2.1

2.3.2.2

2.3.2.3

2.3.2.4

2.3.2.5

2.3.2.6

2.3.2.7

Reset Circuits.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Sensor Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Carriage Motor Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Paper Feed Motor Drive Circuit. . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Printhead Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Host Interface.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

EEPROM

Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

CIRCUITRIES

2-1

2-8

List of

Figure 2-1 Figure 2-2 Figure 2-3. Carriage Drive

Figure2-4. Home Position Sensor Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Figure 2-5. Friction Feed Operation.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Figure 2-6. Tractor Feed Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Figure 2-7. Paper End Sensor Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Figure 2-8. Release Sensor Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Figure2-9. Ribbon Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Figure 2-10. Power Supply Circuit Block Diagram. . . . . . . . . . . . . . . . . . . . . . . 2-8

Figure2-11. Main Control Circuit Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . 2-9

Figure2-12. Data Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Figure 2-13. Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Figure 2-14 Figure 2-15 Figure 2-16 Figure 2-17 Figure 2-18 Figure 2-19

Block Diagram of the Printer Mechanism . . . . . . . . . . . . . . . . . . . . 2-1

Printhead-Printing Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

M~chanism

Sensor Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Carriage Drive Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . 2-11

Paper Feed Motor Drive Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Printhead Drive Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . 2-13

Host Interface.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

EEPROM

Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Figures

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

List

of Tables

Table 2-1. Ribbon-Feed Gear Train. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Table 2-2. Voltage Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 2-3.

Table 2-4. Phase-Excitation Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Functionsofthe

Main

ICand Circutis

. . . . . . . . . . . . . . . . . . . . . . . 2-10

2-8

2-11

LX-105O+

Service Manual

Operating Principles

2.1 OVERVIEW

This section describes the operating principles of the printer mechanism and the electrical circuits

of the

LX-105O+.

2.2

OPERATING PRINCIPLES OF THE PRINTER MECHANISM

The

LX-105O+

carriage drive mechanism, and various sensors. The figure below shows a block diagram of the

printer mechanism.

printer mechanism is composed of the

printhead

unit, paper feed mechanism,

Printhead

. . . . . . . . . . . . . . . .

Phase

Stepper Motor

Carriage Drive

1160nlStep

ll120*lStep

CR HOME

carnage Home

Phase

Stepper Motor

Paper

Feed

11216

’lStep

Paper End

Figure 2-1. Block Diagram of the Printer Mechanism

RELEASE

FRICTIOtV

TRACTOR

Release Lever Position

Rev.

2-1

Operating Principles

2.2.1 Printhead Printing Operation

The dot-wire operation during printing is as follows. When the head-driving coil for a dot wire is energized, the actuating plate, which is engaged to one end of the dot wire, is attracted to the iron core, and drives the dot wire toward the platen. The dot wire forcefully pushes both ribbon and paper against the platen, causing a dot to be printed.

When the head-driving coil is deenergized, the actuating plate spring causes the actuating plate to return to its initial position. After striking the platen, the dot wire also returns to its initial position, partly in response to the impact energy, and partly as a result of the wire-resetting spring. The dot wire then remains engaged to the actuating plate until it is driven again.

LX-105O+

Service Manual

Printhead

Solenoids: Wire Diameter:

Drive Voltage:

Coil Resistance:

specifications areas follows:

Wire Resetting Spring

Stnnner

.-.

-r

F-

‘4P+—+1

Actuating Plate

9 solenoids

0.29 mm 24 VDC * 10Yo

19.2 ~ 1.0

Dot Wire

fi2

at 25° C

Ilxl

cl--k-e

Ribbon

Platen

‘7”*

Paper

~~l~HeadDrivin9Coi,

!’

Act;ating plate

SPrin9

Figure 2-2. Printhead Printing Operation

2-2

Rev.

LX-1050+ Service Manual

2.2.2 Carriage Drive Mechanism

Operating Principles

The carriage mechanism includes the

and the platen. The timing belt is connected to the bottom of the carriage. The belt is driven by the carriage motor

and moved via the beltdriven pulley. The unit is moved right and left along the carriage guide shaft and plate.

Carriage motor specifications are as follows: Type:

Drive Voltage: Coil Resistance: Current Driving:

4-phase, 48-pole step motor 24 V

MY/o

11 G2

77.

0.36 A *

0.28 A Holding: 0.09 A

IO%(Typical)

* IO%(Typical)

25°C

printhead,

f IWO

the carriage, the timing belt, the carriage motor,

printhead

(Draft Printing) (NLQ Printing)

-%’”

is mounted on the carriage, and the entire

Left

.carr-

Figure 2-3.

2.2.2.1

Following figure shows the home position sensor. The sensor switch is ON when the home position.

Home

Position Sensor

Carriage Drive

Mechanism

the carriage is at

Rev.

Figure 2-4. Home Position Sensor Mechanism

2-3

Operating Principles

LX-105O+

Service Manual

2.2.3 Paper Feed Mechanism Operation

Friction feeding is used for cut sheets, and push tractor feeding is used for fanfold paper.

Friction-Feed Operation

The paper is held against the platen by paper-feed rollers. The paper-feed motor rotates the platen gear, via the paper-feed reduction gear, in the direction friction between the paper-feed rollers and the platen, the rotation of paper to be fed. The feeding direction is indicated by the arrow in the Figure.

The paper is held against the platen by the spring force of the paper-feed rollers, and can be released by shifting the paper-release lever forward.

shown in following

the

platen gear causes the

figure. Because of the

Platen

,ap~en,ion

Paper

,O,,er

paper (Cut Sheet)

Figure 2-5. Friction Feed Operation

ion Gear

Motor

d Motor

2-4

Rev.

+ 68 hidden pages

Epson LX-1050+ User Manual

PRECAUTIONS

PREFACE

REVISION SHEET

TABLE OF CONTENTS

General Description

1.2 SPECIFICATIONS