Epson LX-1050+ User Manual

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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

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.

LX-105O+

Push Tractor Feed Operation

Service

Manual

Operating Principles

When the push tractor unit is used, the paper is set such that its holes mesh with the tractor pins along the tractor belt. The paper feed motor is driven and, via the pinion on the motor shaft, rotates

the gears in the direction shown in following figure, rotating the tractor belts. This causes the paper advances in the direction indicated by the arrow. When push tractor feeding is used, the pressure of the paper feed rollers against the platen is released by moving the paper release lever to its

forward setting.

ear

Figure 2-6. Tractor

Paper-feed motor specifications are as follows:

Type:

Drive Voltage:

Coil Resistance: Phase Excitation: Current:

4phase, 48-pole step motor

VDC *

40 ohms*

10Yo

79!.

at 25°C 2-2 phase Maximum, 1.1A (Rush Current, 26.4

Driving: 0.30 A (Typ., 480

Holding: 0.06 A

*20 rnA

Driving Frequency: 480

pps,

PPS

Feed Operation

VDC)

Gear

Motor

Rev.

2-5

Operating Principles

2.2.3.1 Paper End Sensor

LX-105O+ Service Manual

Following figure show the paper end sensor. This sensor switch is ON when no paper is in place

(e.g., when the paper supply

has run out.).

Paper

“Paper present”

Figure 2-7. Paper End Sensor Mechanism

2.2.3.2 Release Sensor

The release sensor senses the position of the release lever in order to detect whether tractor feed or

friction feed is in effect.

Fric/ion/Tractor Sensor

Figure 2-8. Release Sensor Mechanism

Rev.

LX-105O+

Service Manual

Operating Principles

2.2.4 Ribbon Advance Mechanism

The ribbon-feed mechanism consists of the ribbon cartridge and the ribbon-feed section. The

ribbondriving

gear is always driven counterclockwise (regardless of the timing belt direction) via

the gear trains shown in following table.

Table 2-1. Ribbon-Feed Gear Train

Direction of Carriage

Movement

Gear Linkage

Left to right (arrow

~ Ribbon-drivin9 Beltdriven

Platen gear (4) -

gear

pulley- Platen gear (1) - Platen gear(3)

Ribbondriving

gear

Following figure shows the ribbon-feed mechanism. The inked ribbon is held in the cartridge case

Beltdriven pulley-+ Platen gear (1) ~ Platen gear(2)

between the ribbon-feed and the ribbon-pressure roller mounted on the ribbon-driving gear.

The

ribbon configuration is such that the ribbon can feed endlessly. The

ribbondriving

gear drives the rollers, which causes the ribbon to be fed.

To prevent ribbon slack, a ribbon-breaking spring is attached at the exit of the cartridge case. A ribbon mask is installed to prevent the ribbon from staining the paper.

b’

Ribbon

Ribbon Feed Roller

‘ress”re ‘O’’er\ >

Ribbon Transmission Gear

P,ane;:’;ar

Ribbon Driving Gear

‘\

m%’d

-&-

“H

\\\

Figure 2-9. Ribbon Feed Mechanism

Breaking

Sp;ing

Carriage

Rev.

2-7

Operating Principles

LX-105O+ Service Manual

2.3 OPERATING PRINCIPLES OF THE ELECTRICAL

This section describes principles of electrical

circuitries.

CIRCUITRIES

2.3.1 Operating Principles of the Power Supply Circuit

The electrical power required by this mechanism is developed using the

combines a filter and a power transformer) and the

T14NfA

board. The Ac input passes first through the filter circuit, where line noise is removed, and is then set to the transformer, where it is stepped down into two separate voltages: AC 26V and AC the power circuits on the

required for operation.

TAMA

board, which converts the power to the DC voltages (see below)

12C.

The transformer output is sent to

TAa Fiher

Unit (which

Table 2-2. Voltage Applications

Voltage

VDC

+24

VDC

Logic circuit voltage Holding voltage for paper feed motor Others

Carriage

Paper-feed motor drive voltage

Printhead

motor drive voltage

drive voltage

Purpose

AC IN

o--

+12

VDC

TAa Filter Unit

Voltage

for the optional l/F

TAMA

Full-wave

rectifier regulator

and circuit

smoothing

circuit

—

Full-wave

rectifier and smoothing circuit

Filter

Circuit

Step-

down

Trans-

former

——1

VAC

~1 ,1

Figure 2-10. Power Supply Circuit Block Diagram

Board

+24

VDC

+24

VDC

regulator circuit

+24

VDC

+12

VDC

➤

2-8

Rev.

LX-105O+

2.3.2 Operating Principles of the Main Control Circuit

Service Manual

Operating Principles

The printer CPU is an 8-bit CPU components of the printer. The that control the assignment of the memory and 1/0 areas.

CPU vPD781OHG

(2C)

~D7810HG

E05A30

gate array contains various memory management functions

running at 15 MHz. It oversees control of all the

~c”’””’

E05A30

(3B)

motor

driver

EIE

Control Panel

Parallel l/F

Figure 2-11. Main Control Circuit Block Diagram

Table 2-3 lists the functions of the components and circuits of the printer. The CPU converts the print data sent from the host computer to image data (the print image). The image data is then loaded to RAM. Each line of data is processed sequentially. The CPU transfers the print data to the

printhead

length of this pulse corresponds to the pnnthead drive voltage. The head drive circuit then outputs

the-head drive signal.

drive circuit. The CPU sends the

Host

Computer

Data

+24V

Printhead

line

Drive

printhead

CPU

Data Input

Print Data

Convertor

drive pulse to the

Image Data

Transfer

printhead

RAM

Input

●

Buffer

—

Image

Buffer

—

drive circuit. The

Rev.

L?ap’nthead

Figure 2-12. Data Flow

2-9

Operating Principles

Table 2-3. Functions of the Main IC and Circuits

LX-105O+

Service Manual

and Circuits

vPD781

OHG

E05A30

ROM

RAM

EEPROM

Looation

Functions

Receives data from the host computer and loads the data to the input buffer in RAM. Expands the input data held in the buffer to

create image data. Loads this image data to the image buffer in

RAM. Transfers the image data to the controls various parts of the printer mechanism, such as the motors.

The gate array

1. Parallel l/F

2. Address decoder

3. Data address multiplexer

4. PF motor control

5. CR motor control

6. Control panel LED drive

Printhead

This ROM memory program and fonts. This RAM is used as an input data buffer and image buffer for

expanding data, and as working area for the program. The

EEPROM

paper position.

E05A30

drive

has a 256-bit memory, and remembers the current

functions areas follows

oontrol

printhead

drive circuit. Also

The paper feed motor drive circuit drives the paper feed motor.

Paper feed motor drive circuit

Carriage motor drive circuit

2.3.2.1 Reset Circuit

11-tis

circuit generates the signal that initializes the printer, and is made by monitoring the +5 and

+24V

voltages when the power is switched ON and OFF.

The reset signal line is

+5V4

—

comect

The paper feed motor is a 4 phase-step motor. The rotation of the motor (position and speed) is controlled by outputting the phase switching signal by the

The carriage motor drive circuit drives the carriage motor. The carriage motor is a 4 phase-step motor. The rotation of the motor (position and speed) is controlled by outputting the phase switching signal by the

to the CPU and gate array 3B.

c15

A1015

R57 10K

)

E05A30

MA165

gate array.

R83

47K

RESET

2-1o

+2J?!-P’

MA4036-M

Figure 2-13. Reset Circuit

ZD2

R82

2.2K

KIT

C18 &

Rev.

LX-105O+ Service Manual

Operating Principles

2.3.2.2

Following figure shows the sensor circuit in block diagram. The

home position. The

A/D convertor senses

2.3.2.3

Following figure shows a block diagram of the carriage motor drive circuit. In this circuit, the phase switching for the carnage motor is directly executed not by the CPU, but by the gate array which acts on the basis of the CPU phase data. SLA7020M drives the carriage motor with a stabilized stabilized current.

Sensor Circuit

PA1

senses paper end. The

+24V

line voltage.

HOME

RELEASE

+24V

line

Carriage Motor Drive

PA2

senses release lever position. The

PAO

PA1

AN5

Figure 2-14. Sensor Circuit

CPU

uPD7810HG

(2C)

PAO

of CPU port senses carriage

AN5

of CPU

(3B),

The excitation system is determined by the firmware and is executed in accordance with the carriage speed, as shown in Table 2-4.

SLA

7020M

( 1A)

CPU

PD78 10HG

(2 c)

E05A30

(3B)

Phase” Data

Figure 2-15. Carriage Drive Circuit Block Diagram

Table 2-4. Phase-Excitation Method

Rev. A

Drive Mode Excitation Type

Mode 1

Mode 2 2-2 phase

Mode 3 1-2 phase

Mode

4 1-2

2-2

phase

Drive Frequency Type

1200

pps

900

pps

1200

pps

900

2-11

Operating Principles

LX-1050+ Service Manual

2.3.2.4 Paper Feed Motor Drive Circuit

The

paper-feed motor drive circuit is shown in

motor which can utilize 2-2 phase excitation. When the paper-feed signal

following figure. me

paper-feed motor is a step

PC2

is set to HIGH, Q20 and Q16 are turned on, and +24 V is supplied to the motor. When the paper-feed motor is not driven, +5 V is supplied, via resistor

R42

and diode D6, to hold the motor.

The paper feed motor is a 48-pole step motor and is

open-loop

controlled. When 2-2 phase

excitation is used to drive the motor, each step feeds the paper a distance of l/216th inch.

CPU

rffPD78

(2C)

EO:\O

(3 B)

10HG

PC2

PFA

PFB

PFC

PFD

RI 16 33K

R87 3.3K

VAVAV

R89 3.3K

VAVAV

R86 3.3K

VAV

R88 3.3K

Vhvf

R45

5.6K

I?44

5.6K

R36

3.3K

+24V

+5V

PFCOM PFCOM

PF A PF B PF C PF D

Figure 2-16. Paper Feed Motor Drive Circuit

LX-105O+ Service Manual

Operating Principles

2.3.2.5

Gate array the head-wire drive pulses from gate array V line).

The to the Print data is expanded in the image buffer as dot patterns. The CPU outputs the dot patterns to the

E05A30.

The data for pins 1 through 8 of the The data for pin 9 of the After data latching, the pnnthead drive pulse width signal FIRE is output from the CPU’s event counter. When the signal is LOW, the gate array will be open, so that the data from

HD9

The drive pulse width is adjusted using CPU port PC6.

CPU

/U PD78 10HG

(2C)

Printhead

E05A30

will be output.

gate array includes circuitry to interface the CPU and the

printhead

is used as an 8-bit + l-bit data latch. The CPU determines the pulse width for

in the following sequence:

Drive Circuit

printhead

is latched by

EO%30

(3 B)

E05A30

printhead

by monitoring the

printhead.

is latched by HDl trough

HD9

of the

E05A30.

Printhead

Drive

Circuit

printhead

The data is output

HD8

of the

drive power (+24

E05A30.

HD1

through

Print herd

--N

DATA

--N

-1/

FIRE

●

--l/

Figure 2-17. Printhead Drive Circuit Block Diagram

Rev.

2-13

Operating Principles

2.3.2.6 Host Interface

LX-105O+

Service Manual

The host

interface circuit is

shown in following figure. STROBE

pulses

from the host computer pass through the low-pass filter, consisting of R72 and C12, and flow into the STROBE terminal. These pulses latch the parallel data and set the BUSY signal HIGH, so that subsequent data transfer is inhibited. At this time, the CPU, by reading address

OCO02H,

can detect whether the data from the computer are latched in the gate array. When the CPU determines that data have been latched, it proceeds to read the data. After the data

have been read, the gate array automatically resets its busy signal.

-1 2

-a

- t-i 0

- .

x x%x

m m m

!+&1+

I+

m *

w!sw w a

0n0

UC-)

:11111%11

H-M

t’i+

Lnu-lmm

CDlnlo(n

-----<<<<

Zzzz

Inlnmln

WUJW

----

<<<<

Zzzz

2-14

Figure 2-18. Host Interface

Rev.

LX-105O+

Service Manual

Operating Principles

2.3.2.7

The

EEPROM

Circuit

stores in its memory the current feed position of continuously fed paper, as well as the current panel settings. This memory is retained even after power is shut off.

EEPROM

can memorize the current position of continuously fed paper, so that this information can

be maintained even if power goes off.

Following figure shows the

EEPROM

is selected when CPU port be sent is set in CPU CPU port PC4’S The

EEPROM

clock:

receives commands to indicate whether to read or write data,

EEPROM

Dort

PB1, and is fed bit-by-bit to the

Data are read,

circuit. Note that this is external to the CPU’s memory space.

PC5

goes HIGH. Once

bit-by-bitjin

line with falling clock pulses.

EEPROM

has been selected, the data to

in line with rising pulses from

and to indicate

addresses.

CPU

PD78 10HG

(2C)

PB 1

PBO

PC5

PC4

777

ER59256 ( 1 c)

TEST

DO Cs

CLK

‘

33K

RI 20

33K

Figure 2-19.

EEPROM

Circuit

Rev.

2-15

Chapter 3 Disassembly and Assembly

Table of Contents

3.1 GENERAL REPAIR INFORMATION

3.2 DISASSEMBLY AND ASSEMBLY

3.2.1

3.2.2 Removal of Casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.2.3 Removal of Circuit Boards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

3.2.4 Removal of Printer Mechanism . .“. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

3.2.5 Disassembly of Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Printhead Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.2.2.1 Upper Casing Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.2.2.2 Control Panel Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

3.2.3.1

3.2.3.2

3.2.5.1

3.2.5.2

3.2.5.3

3.2.5.4

3.2.5.5

3.2.5.6

3.2.5.7

3.2.5.8

3.2.5.9

TAMA Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

TA-a Filter Unit Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Removal ofCarriage Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Removal

RemovalofPlaten. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Removal ofFrame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Removal ofPaperFeed Motor . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Removal ofPaperEndSensor . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Removal of Paper Guide Plate . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Removal Disassembly

ofHome

ofCarriage.

Position Sensor.. . . . . . . . . . . . . . . . . . . . . 3-10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

ofTractorUnit

. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

3-1

3-2

Figure 3-1,

Figure 3-2. Figure 3-3. Figure 3-4. Figure 3-5. Figure 3-6. Figure 3-7. Figure 3-8. Figure 3-9. Figure 3-10. Figure 3-11.

Figure 3-12. Figure 3-13. Figure 3-14. Figure 3-15. Figure 3-16. Figure 3-17. Figure 3-18. Figure 3-19.

Figure 3-20. Figure 3-21. Figure 3-22. Figure 3-23. Figure 3-24.

List of Figures

PaperTension Unit Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Printhead Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Push Tractor Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Upper Casing Removal -1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Upper Casing Removal -2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

FFC.

Control Panel

Control Panel Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

TAMA Board Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

TA-a Filter Unit Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Printer Mechanism Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Carriage Motor Mounting Plate Removal . . . . . . . . . . . . . . . . . . . 3-9

Carriage Motor Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Home-Position Sensor Removal . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Crescent Ring Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Platen Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Head Cable Holderand

Helical Spring Hook. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Release Lever Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Release Lever Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Separation of Tractor Disengage Cam . . . . . . . . . . . . . . . . . . . . 3-14

Bottom Viewof Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . 3-14

Separate of Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Paper Feed Motor Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Paper EndSensorRemoval . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

FFC

Removal . . . . . . . . . . . . . . . . . . . . 3-12

Figure 3-25. Paper Guide Plate Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Figure3-26.

Figure 3-27. Tractor Frame l-Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Figure 3-28. Extraction

Figure 3-25. Tractor Phase Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Adjust

l_everRernoval

ofTractorunti

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

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

3-17’

S-18

List of Tables

Table 3-1. Repair Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 3-2. Measuring Instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1

LX-105O+

Service Manual

3.1 GENERAL REPAIR INFORMATION

Disassembly and Assembly

This chapter describes the procedures for of the

LX-105O+.

Prior to beginning any of these procedures, be certain that the AC power cord is disconnected.

To help prevent hands jiotn being cut by the printer mechanism or sharp plate edges, wear

gloves when performing these procedures.

The printer mechanism, boards, and other parts are sometimes held in place with plastic

clips rather than screws. Be

Tables 3-1 and 3-2 list tools and measuring instruments recommended for carrying out disassembly and repair.

carefil

removin~

not to damage these clips when removing them.

replacins and adjusting the main components

Table 3-1. Repair Tools

Description Part No.

Round-nose pliers

B7404OO1OO

Nipper

Tweezers Electric soldering iron E-ring holder #2.5 E-ring holder #5

PhiliDs

screwdriver No. 2 Screwdriver No. O Thickness gauge set (#F518)

6740500100

B641OOO1OO

B7402OO1OO 6740800400 6740800700

6743800200

6743800300

B776702201

Table 3-2. Measuring Instruments

Description

Oscilloscope

Muttimeter

To ensure optimal performance of the printer, be sure, following reassembly and adjustment, to lubricate, apply adhesive, clean, and maintain, according to the procedures described in Chapter 6.

Rev. A

3-1

Disassembly and Assembly

3.2 DISASSEMBLY AND ASSEMBLY

LX-105O+

Service Manual

This section details the disassembly procedures for the

LX-105O+.

As a rule, reassembly is performed by simply reversing the procedures; a number of special notes, however, are provided under the heading “Notes for Reassembly.” When a disassembly or reassembly procedure requires that an adjustment be performed, the adjustment is described under the heading, “Required Adjustment.” Be sure to perform these adjustments as indicated.

Be sure that you have read Section 4.1, “General Repair Information,” before performing disassembly. Be sure that paper and ribbon cartridge are removed before disassembly.

The disassembly procedure detailed below is in the following sequence: (1) removal of the

printhead,

(2) removal of the casings, (3) removal of the circuit boards, (4) removal of the printer

mechanism unit, and (5) disassembly of the printer mechanism.

3.2.1 Printhead Removal

[Step

Remove the printer cover, and confirm that paper and ribbon cartridge have been

removed. Open the cover of the paper tension unit.

paper TensIon

[“

[

Prlnthead

Pli4en

Figure 3-1. Paper Tension Unit Cover

3-2

Rev. A

LX-105O+

[Step

Unlock the two levers securing the

Service Manual

lift and remove the

printhead.

printhead

thecarnage

Disassembly and Assembly

bypulhngthemdown. Then

Levers

[Step

Figure 3-2.

Disconnect the head cable from

Printhead

Removal

theconnector ontheprinthead.

Rev.

3-3

Disassembly and Assembly

3.2.2 Removal of Casing

This section details the procedure for removing the upper casing and the control panel.

3.2.2.1 Upper Casing Removal

LX-105O+

Service Manual

[Step 1] [Step

Remove the sheet guide unit, printer cover, paper tension unit, and paper feed knob. Pull in the two notches securing the push tractor to the printer mechanism, and remove

the push tractor from the printer mechanism.

[Step [Step

Figure 3-3. Push Tractor Removal

Remove the two Insert a standard screwdriver into each of the two holes at the front of the upper

and gently push (See figure 3-4) to unlock the notches.

c“’”’’’”

C.B.B-tite

The notch can be

unlocked it in the direction

shain by the

arrow using

the screwdriver

(M4 x 25) screws securing the upper case.

Lower

Case

Guide

[“<l

by pushing

CBB(M4 X 25)

Upper

Case

Notch

msing,

3-4

Figure 3-4. Upper Casing Removal -1

Rev.

LX-105O+ Service Manual

[Step

While lifting the upper casing,

CN3 on the

TAMA

discomect

the cable of the control panel from connector

board. Then remove the upper casing.

Disassembly and Assembly

Figure 3-5. Upper Casing

NOTE FOR REASSEMBLY:

Before reassembling the upper Control Panel and

TAMA

board in such a way that it can be connected to the Panel Cable Sailed

Plate.

Figure 3-6. Control

casin&

prepare the

Removai

FFC

(Flat Flexible Cable) that connects the

-2

Control

Panel

Panei FFC

Rev.

3-5

Disassembly and Assembly

LX-105O+

Service Manual

3.2.2.2

Control Panel Removal

[Step 1] Remove the upper casing (as described in the previous section).

[step

Turn the upper casing over, push in the two notches on the casing that are securing the

control panel to it, and remove the control panel.

anel

Figure 3-7. Control Panel Removal

3-6

Rev. A

LX-105O+

Service Manual

3.2.3 Removal of Circuit Boards

This

section describes the procedure for removing the

TAMA

3.2.3.1

Board Removal

TAMA

Disassembly and Assembly

Board and the TA-a filter unit.

[Step 1]

Do not pull roughly on the connectors, or you may damage the board. Remove them by pulling gently while at the same time holding the board.

[Step 2]

[Step 3]

CN9

Remove the upper casing (See section 3.2.2.1). The following connectors on the board, which are connecting it to external components, should be disconnected:

CN5, CN6, CN7, CN8 FFC

Remove the two C.B.Btite grand rink which are securing the TAMAboard to the base plate and the lower casing.

Loosen the four bent tabs on the lower casing which are securing it to the

Then

remove the

TAMA

(Flexible Flat Cable), and CN9.

(P2) (M3

board.

CBS(0)(M3X8)

x 6) screws, the

C.B.S-tite

(0)

(M3

x 8) screw, and

TAMA

~TAMA

8oard

board.

TAMA

—-

CN4,

CN8

CN7

CN6 CN5 CN4

carefil

them or to cause damage to components on the

When the

Section 4.2

not to bend the tabs toofar. Also, when pushing the tabs, be careful not to break

board is replaced, perform the following adjustment.

BI-DIRECTIONAL

Figure 3-8.

TAMA

PRIN7TNG ALIGNMENTADJUSZ7WENT

Board

Removal

board.

Rev. A

3-7

Disassembly and Assembly

LX-1050+ Service Manual

3.2.3.2

[Step 1] [Step

[Step

[Step 4]

TA-a Filter Unit Removal

Remove the upper casing (See section 3.2.2.1). Disconnect connector

CN9

at the

TAMA

board. This

unit. Remove the C. B.(O) Remove the two C.

(M4

x 8) screw securing the frame ground wire.

B.B-tite (M4

x 12) screws and two

filter unit, and then remove the unit.

CBB(M4X12)

Screw

CB(0)(M4X8)

Screw

TAs

C6(0~(M4x8)

screw

Figure 3-9.

TA-a

Filter Unit Removal

‘Fitter

Unit

comector comects

C.B.(O)

CB(0)(M4X8)

screw

the

TA-a

(M4

x 8) screws securing the

CBB(M4X12)

screw

filter

3.2.4 Removal of Printer Mechanism

This section describes the removal of printer mechanism.

[Step 1]

[Step 2]

Disconnect the cables from the following connectors on the

CN5

(white),

Remove the fore C.

CN6

(black), and

B.B-tite (M4

CN8 FFC

(Flexible Flat Cable).

x 12) screws securing the printer mechanism to the lower

case.

[Step 3]

Remove the printer mechanism.

}=J

II+M!

TAMA

board:

n LB-III

CN4

(red),

Figure 3-10. Printer Mechanism Removal

When the printer mechanism is replaced, perform the following adjustment.

Section 4.2

3-8

BI-DIREC~ONAL PRlN77NG

ALIGNMENTADJUSTMENT

Rev. A

LX-105O+ Service Manual

Disassembly and Assembly

3.2.5 Disassembly of Printer Mechanism

This section details the removal of components from the printer mechanism.

3.2.5.1 Removal of Carriage Motor

[Step 1] Remove

theprintermechanism

(See section 3.2.4). [Step 2] Disconnect the motor cable from the carriage motor. [Step 3] Remove the belt tension spring [Step 4] Remove the

timingbelt

fromthebeltpulley.

EOO1

from the base frame.

[Step 5] Remove the carriage motor mounting plate together with the carriage motor.

Connector

—CR Motor

Frame

‘CR Motor

Helical

Spring

Figure 3-11. Carriage Motor Mounting Plate Removal

[Step 6] Remove the two

C.B.S-tite

(0) (M3 x 6) screws

on the rear side of the carriage motor

mounting plate, which secure the carriage motor.

CR Motor Frame

CR Motor

CBS(0) Screw

(M3x6)

CBS(0)

(M3x6)

screw

EM-142

EPM

0511

260

Figure 3-12. Carraige Motor Removal

DDnlB&YuUltiNua

When the carriage motor is removed, perform the following adjustment. Section 4.1.1 Carriage Motor Backlash Adjustment

4.2

BI-DHWCTIONAL.

PRINTER ALIGNMENTADJUSTMENT

:4K8ZSM:WIIBI

Rev.

3-9

Disassembly and Assembly

3.2.5.2 Removal of Home-Position Sensor

LX-105O+ Service Manual

[Step 1] Remove the printer mechanism. (See

section3.2.

[Step 2] Turn the printer mechanism upside-down. [Step 3] Push in the notch securing the home-position

base frame.

Figure 3-13. Home-Position Sensor Removal

sensor, and remove the sensor from the

Notch

Sensor

3-10

Rev.

LX-105O+

Service Manual

3.2.5.3 Removal of Platen

[Step 1] Remove the printer mechanism. (See section 3.2.4)

[Step2] [Step3]

Remove the paper tension unit. Remove the C-ring (6) from the plate shaft.

Crecent

Disassembly and Assembly

Ring

Figure 3-14. Cresent Ring Removal

[Step

Remove

platen cover. [Step 5] Remove theshaftholderfrom therightsideofthe side frame. [Step 6] Remove the platen bymovingit totheright side.

the two

C.B.N.Stite (M3 x 6) screws securing the platen cover and remove the

CB(N)S

Screws

(M3x6)

Figure 3-15. Platen Cover Removal

mn~umlum

:wK@lDma31Dl

When the platen is replaced, perform the following adjustment. Section 4.1.3 Platen Gap Adjustment

Rev.

3-11

Disassembly and Assembly

3.2.5.4 Separate of Frame

[Step 1] Remove the platen. (See section 3.2.5.3) [Step 2] Remove the printhead. (See section 3.2.1)

[Step3]

Remove the

FFC,

head cable holder (L), and head cable holder (R) from base frame.

LX-105O+

Service Manual

Figure 3-16. Head Cable Holder and

[Step 4] Disconnect

Head Cable’

themotor@ble

Hoder

Head Cable

from the carnage motor and thepaperfeed motor.

Hoder

FFC

Removal

[Step 5] Change position of tension spring hook from normal position totemporary position.

3-12

Temp{ary

Position

~OOOHelical

Spring

Normal

Position

Figure 3-17. Helical Spring Hook

Rev.

LX-105O+

[Step 6] Push thetwonotches of the release lever outward. Remove the release lever.

Service Manual

Disassembly and Assembly

Figure 3-18. Release Lever Removal

When the release lever is replaced, the markings should be analogously positioned.

Release Lever

}

Rev. A

Marking

f .’

Figure 3-19. Release Lever Replacement

3-13

Disassembly and Assembly

[Step

Separate the tractor cancellation cum from paper feed lever cancellation shaft.

-2iiB

Paw

Lever Drive Shaft

LX-105O+

,Tractor

Service Manual

Disengage Cam

[Step

Separation of Tractor Diseugage Cam

Turn the printer mechanism upside-down, and manually move the carriage unit until it is

at the cut-out section of the base frame. The joint of the carriage unit and timing belt should be visible through the cut-out.

❑

‘

Figure 3-21. Bottom View of Printer Mechanism

~“m

cut-out

ilQ

-E

❑

ll~n

❑

‘

:=’

Base Frame

o n

3-14

Rev.

LX-105O+

Service Manual

Disassembly and Assembly

[Step9] Remove the two

base frame, and remove the side frames. Separate side frames from base frame.

C.B.S-tite.

(0)

(M3

x 6) screws which are securing the side frames to the

CBS(0) (M3~ 6) Screws

Figure 3-22. Separate of Frame

When the printer mechanism is separated, perform the following adjustment. Section 4.1.3 Platen Gap Adjustment

3.2.5.5 Removal of Paper Feed Motor

[Step 1] Separate side frames from base frame. [Step 2] Remove the two

C.B.S-tite.(0) (M3

(Seesection3.2.5

.4)

x6) screws securing the paper feed motor.

Motor

Figure 3-23. Paper Feed Motor Removal

When the paper feed motor is removed, Section 4.1.2 Paper Feed Motor Backlash Adjustment

Rev. A

petform

the following adjustment.

3-15

Disassembly and Assembly

LX-105O+

Service Manual

3.2.5.6

[Step

[Step 3]

Removal of Paper End Sensor

Separate side frames from base frame. (See section 3.2.5.4)

Loosen the two bends securing the paper end sensor to the paper guide at the back of the printer.

Remove the paper end sensor.

Bends

Psper

Guide

Sensor

3.2.5.7

[Step 1] [Step 2] [Step 3]

Figure 3-24. Paper

End Sensor Removal

Removal of Paper Guide Plate

Separate side frames from base frame. (See section 3.2.5.4) Remove the paper guide plate spring from the base frame. Remove the paper guide plate.

Springs

Paper

Guide

Plate

3-16

Figure 3-25. Paper Guide Plate Removal

Rev.

LX-105O+ Service Manual

Disassembly and Assembly

3.2.5.8

[Step 1] [Step 2] Remove the HNO (M4) nut Securing theadjustlever, and remove the adjust lever. [Step 3] Remove the head adjust lever from thecarriage guide shaft. [Step 4] Remove thecarnageguide shaft and the carriage from the frame. [Step 5] Remove the carnage from the carriage guide shaft.

Removal of Carriage

%paratesideframes

from base frame. (Seesection3.2.5 .4)

O(M4)

Figure 3-26. Adjust Lever Removal

When the paper feed motor is removed, perform the following adjustment.

Section 4.1.3 Platen Gap Adjustment

3.2.5.9

[Step 1] Pull and remove the tractor shaft and the sprocket guide from the tractor frame.

Diaaaaembly

of Tractor Unit

/7zkTrac’0’Frame(L’

Rev.

Figure 3-27. Tractor Frame L Removal

3-17

Disassembly and Assembly

LX-105O+ Service Manual

[Step 2]

Remove

sprocket guide shafts.

the

tractor set L, the paper support, and tractor set R from the tractor and

Figure

NOTES FOR REASSEMBLY:

When

reassembling, align the phases as shown below.

3-28. Extraction of Tractor Set

‘,.-’,

Figure 3-29. Tractor Phase Alignment

3-18

Rev.

Chapter 4 Adjustments

Table of Contents

4.1 ADJUSTMENTS

4.1.1 Carriage Motor Backlash Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.1.2 Paper Feed Motor Backlash Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Paten

4.1.3

4.2 61-DIRECTIONAL PRINTING ALIGNMENT ADJUSTMENT

Figure 4-1. Carriage Motor Backlash Adjustment . . . . . . . . . . . . . . . . . . . . . . . 4-1

Figure 4-2. Paper Feed Backlash Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Figure 4-3. Removal of Ribbon Mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Figure 4-4. Head Adjust Lever B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Figure 4-5. Platen Gap Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Figure 4-6. Eccentric of Guide Shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Figure 4-7.

Gap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

List of

Paten

Gap. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Figures

4-1

4-5

LX-105O+

Service Manual

4.1 ADJUSTMENTS

Adjustments

This section describes the adjustment procedures necessary when the

LX-105O+

printer is reassembled or when parts are reinstalled or replaced. These procedures are necessary to ensure the correct operation of the printer.

4.1.1 Carriage Motor Backlash Adjustment

This

adjustment is required either when the carriage motor is replaced or when its mounting

position is shifted.

Remove the carriage motor frame and carnage motor from base frame. (See section 3.2.5.1)

2. Loose the two CBS(0) (M3 x 6) screws on the carriage motor.

3. Manually rotate the carnage motor, and adjust the backlash between the pinion and the

pulley. Allowable backlash: 0.05-0.15 mm

4. Tighten the screws on the carriage motor.

Motor Frame

CBS(0)

(M3x6)

SCreW

CR Motor

belt

Figure 4-1.

Belt Pulley

Carraige

CBS(0) Screw

(M3x6)

o “

/“

Pinion Gear

\ ‘\

Motor Backlash Adjustment

Rev.

4-1

Adjustments

4.1.2 Paper Feed Motor Backlash Adjustment

This adjustment is required either when the paper feed motor is replaced or when its mounting

position is shifted.

Separate side frames from base frame. (See section 3.2.5.4)

Loose the two

3. Manually rotate the paper feed motor, and adjust the backlash between the pinion and the appear feed reduction gear. Allowable backlash: 0.05-0.20 mm

Tighten the screws on the paper feed motor.

CBS(0)(M3

x 6) screws on the paper feed motor.

PF Motor

LX-105O+

Service Manual

0 “

/“-

~ )“,

)

0.05 -O.20mm

0 /’

Paper

Reduction Gear

Feed

/“

Pinion Gear

~y)

o “

“’==4

“’---d’

Figure 4-2. Paper Feed Motor Backlash Adjustment

1’

4-2

Rev.

LX-105O+

Service Manual

Adjustments

4.1.3 Platen Gap Adjustment

Following the removal of the carriage guide shaft or adjust lever, or if printing is abnormal, the gap between the platen and the print head should be adjusted.

1. Remove the printer mechanism (See section 3.2.4),

Remove the

it slightly forward, then lifting.

printhead.

Using tweezers, remove the ribbon mask. Remove the maskby pulling

Figure 4-3. Removal of Ribbon Mask

3. Reinstall the

4. Set the release lever to the friction position.

5. Set the parallel adjust lever to the center position.

6. Manually move he carriage to column 126.

7. Lightly loosen the

printhead.

HMO(M4)

nut securing the head adjust lever.

Rev. A

Figure 4-4. Head Adjust Lever B

Adjustments

insert the blade of a screwdriver into the countersink of carnage guide shaft.

LX-105O+

Service Manual

Large

< Countersink>

\/’”

Carriage

G;ide

Shaft B

Figure 4-5. Platen

Small

r---

Gap Adjustment

9. Adjust the platen gap using a thickness gauge, while rotating carnage guide shaft in the direction of the arrow in figure.

Gap value: 0.44 mm gauge is inserted.

0.47 mm gauge is not inserted.

~111]

/;!1’

,,,;

Platen

0.4!5mm

Carriage Guide Shaft

Screw

Figure 4-6. Eccentric of Guide

‘

Printhead

a>b

Shaft

Figure 4-7. Platen Gap

10. Set the head adjust lever at the 2nd position in step 9, and tighten the HNO(M4) nut.

11.

Manually move the carriage to column 10.

12.

Using the thickness gauge, parallel adjust lever so that the platen gap matches the specified value.

13.

Move the carriage to the 126 column, and measure the gap

value

again to confirm that the gap

value is correct. Remove the

14.

printhead

from the carriage and set the ribbon mask, then reinstall the

printhead

on the carriage.

4-4

Rev.

LX-105O+ Service Manual

Adjustments

4.2 61-DIRECTIONAL PRINTING ALIGNMENT ADJUSTMENT

The

bi-directional

main board is replaced. By performing this adjustment, a compensation value is determined for the mechanical control as to compensate the deviation of print position, which may be caused by the different print speeds due to the tolerance of the mechanical components, and the deviation of print timing between odd-numbered lines and even-numbered lines in printer stores the compensation data in the EEPROM on the main board (TAMA), and referring to this data when the

Set continuous paper to the tractor unit of the printer.

Connect the PC to the printer and turn the both units on.

Execute BASIC on the PC and start the adjustment program “SHASTAWP.BAS”.

Follow the instruction displayed on the monitor, and press ENTER key to start the adjustment.

The printer pMts the draft mode check pattern with a sample compensation value.

Check the printed draft mode sample pattern, and if the character”

in both mid-numbered lines and even-numbered line, enter the compensation value in the range from -16 to +16, from the keyboard.

■

Positive compensation value: Shift 2nd line to LEFT

Negative compensation value: Shift 2nd line to RIGHT

The printer print the daft mode sample pattern with the selected compensation value for confirmation. If the alignment is good, press “Y” to

The printer printing same as procedure of draft mode.

If the alignment is good, press “Y” to finish the adjustment.

10,

Turn the printer off.

printing alignment adjustment is required when the printer mechanism or the

bi-directional

printing is performed.

NLQ

mode sample pattern. The procedure of

NLQ

mode adjustment.

bi-directional

1“

is not vertically aligned

NLQ

mode adjustment is

printing. The

Because the compensation value specified within this program is not valid until the printer is turned off, turn the printer off immediately after you have finish the adjustment.

Rev. A

4-s

Chapter 5 Troubleshooting

Table of Contents

5.1 OVERVIEW

5.2 SELF-DIAGNOSTIC FUNCTION

5.3

TROUBLESHOOTING

5.3.1 Troubleshooting of Abnormal Operation . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

5.3.2 Unit Repair -

TAMA Main Control Board . . . . . . . . . . . . . . . . . . . . . . . . 5-12

List of Tables

Table 5-1. Motor Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Table 5-2. Sensor Status. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Table 5-3. Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Table 5-4. Symptoms and Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Table 5-5. The Printer does Not Operate at All . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Table 5-6. The LEDs do Not Operate at All. . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Table 5-7. The Buttons do Not Operate at All . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Table 5-8. Carriage Error Displayed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Table 5-9. Paper is Not Fed (1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6

Table 5-10. Paper is Not Fed (2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Table 5-11. Paper Out Displayed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

Table 5-12. Abnormal Voltage Displayed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Table 5-13. Incorrect SRAM Displayed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Table 5-14. Incorrect RAM Inside CPU Displayed. . . . . . . . . . . . . . . . . . . . . . . 5-8

Table 5-15. Self-test is Abnormal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8

Table 5-16. Self-test Printout has Poor Quality (1) . . . . . . . . . . . . . . . . . . . . . . 5-9

Table 5-17. Self-test Printout has Poor Quality (2) . . . . . . . . . . . . . . . . . . . . . 5-10

Table 5-18. Abnormal Printing in On-line Mode (1) . . . . . . . . . . . . . . . . . . . . . 5-10

Table 5-19. Abnormal Printing in On-line Mode (2) . . . . . . . . . . . . . . . . . . . . . 5-11

Table 5-20. Abnormal Printing in On-line Mode (3) . . . . . . . . . . . . . . . . . . . . . 5-11

Table 5-21. Repair of the

TAMA Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

5-1

5-2 5-2

LX-105O+

Service Manual

Troubleshooting

5.1 OVERVIEW

Troubleshooting most other serial impact dot matrix printers is difficult to perform, since there

may be wide variety of problems.

selfdiagnostic function

components.

The following tables and figure provide troubleshooting information.

that reduces troubleshooting time by identifying failed parts or

Therefore, the

Table 5-1. Motor Resistance

LX-105O+

have a sophisticated, built-in

Motor

CR Motor

PF Motor

Sensor

PE Sensor

HP Sensor

Release Sensor

Printhead

Resistance

Q *10 Q

11.0

40.0 Q

Table 5-2.

Point

CN6 / Pin 1

CN7

/ Pin 1

CN4

/ Pin 1

/ Phase

7?40 /

Phase

Sensor Status

Signal Level

H (5V)

(GND)

(5V)

Paper exist

No paper (Paper end) Out of home position At home position

Release/Tractor feed

Remark

At25“C

At25‘C

Status

Friction feed

Rev.

O .8

( Wire assignment)

Coil Resistance:

19.2 & 1.90 at 25-C

(8etween

#’1 #’3

( Terminal assignment)

j#12

#14 #16

Figure 5-1.

Printhead

each dot wira and common.)

Resistance

5-1

Troubleshooting

5.2 SELF-DIAGNOSTIC FUNCTION

LX-1050+ Service Manual

This section describes the

selfdiagnostic

function, in which the controller automatically checks the

operating conditions of each component. If any abnormality is detected, the printer displays an

error message by beep sound. Table

5-3

lists

the messages that tell you if service maintenance is

required.

Table 5-3. Error Codes

Carriaae

Paper out

Error

trouble

I Bee~s

6 times,

Beeps 20 times, pausing briefly after 4 beeps

Abnormal voltage Beeps 8 times, pausing after every beep

Incorrect SRAM Incorrect RAM inside CPU

Beeps 8 times, pausing briefly after 2 beeps

Beeps indefinitely until power OFF

Buzzer

pausing

after 3rd

beep

5-2

Rev. A

LX-105O+ Servjce

Manual

Troubleshooting

5.3 TROUBLESHOOTING

This section describes the troubleshooting of abnormal operations and circuit board unit repair.

5.3.1 Troubleshooting of Abnormal Operation

This section describes how to detect malfunctions, how to determine the cause, and what actions to take for various types of malfunctions. Each paragraph refers you to a detailed troubleshooting

table.

Table 5-4. Symptoms and Problems

Symptom

The printer does not operate at all. The

LEDs

on control panel does not

oDerate

at all.

The buttons on control panel does not operate

Carriage error displayed Paper is not fed

Paper out displayed Abnormal voltage displayed Incorrect

Incorrect RAM inside CPU displayed

Self test abnormal

SRAM disdaved

Printer Condition

Printer mechanism does not initialize, when power on.

The printer mechanism start initialized, but

LEDs

does not operate.

The printer does not change state, when push the button.

The printer display carriage error, when power on.

The paper is not fed from tractor. The paper is not fed from manual feed

slot.

The paper is fed, but paper out displayed I5-11

I I I

The printer display abnormal voltage.

ITheprinterdisplawd incorrect

The printer display incorrect RAM inside

CPU.

The carriage is moved, but the does not print.

starl

printhead

SRAM. I

5-5

5-6

5-7

5-8 5-9

5-1o

5-12

5-13

5-14

5-15

Self test printout has poor quality

Abnormal print in on line mode

Dot missing 5-16

Line spacing is bad

Bi-directional

The printer does not print.

Data from the host is incorrectly 5-20

printing position is abnormal

5-17

5-18 5-19

Rev. A 5-3

Troubleshooting

LX-105O+ Service Manual

Table 5-5. The Printer does Not Operate at All

Step

The

Cause

TA-a

filter unit maybe

dead.

The

TAMA

board maybe

bead.

Table 5-6. The LEDs do Not Operate at All

Cause

Connector

CN3

on the

TAMA

board may be disconnected.

Control panel may be dead. 2

Step

Checkpoint

connector

TAMA

board disconnected?

CN9

on the

Is the fuse F1 on the

filter unit blown?

With the power on, are there output of 26

two red wires and 12

VAC

between

between two blue wire for

CN1

on the

TA-a

filter unit.

Checkpoint

Is connector

TAMA

board disconnected? the

CN3

on the

—

TA-a

VAC

Finding

Yes

—

Finding

Yes

—

Solution

Connect

TAMA

CN9

board

Replace the fuse F1 .

Replace the

TA-a

filter unit.

Replace the

TAMA boafd

Solution

Connect

TAMA

CN3

board.

Replace the

control panel.

The

TAMA

board maybe

dead.

Table 5-7. The Buttons do Not Operate at All

Cause

Connector board may be disconnected.

Control panel may be dead.

The dead.

CN3

TAMA

board maybe

on the

TAMA

—

Step

, Is connector

TAMA

—

— —

Checkpoint

CN3

on the

board disconnected?

—

Finding

Yes

—

Replace the

TAMA

board.

Solution

Connect the

TAMA

CN3

board.

Replace the

control panel.

Replace the

TAMA

board.

Rev.

LX-105O+

Service Manual

Troubleshooting

Table 5-8. Carriage Error Displayed

Cause

Step

The carriage

mechanism is bad.

The HP sensor is dead.

The carriage motor is s dead.

Checkpoint

Turn the printer off and try to move the carriage manually. Does the

carriage move smoothly?

Does the carriage move and clash

to right or left frame before error

displayed? Disconnect

CN5

on the

TAMA

board and check the coil resistance between: pin 6 and pin 4; pin 2 and pin 4; pin 5 and pin 3; pin 1 and pin 3 (4 points total) on the disconnected cable side using a

muitimeter.

Pin 6- Pin 4 Pin 2- Pin 4 Pin 5- Pin 3

Pin 1- Pin 3 Are the resistances of all four points approximately 11 ohms?

If any coil is shorted, check the carriage motor drive circuit using

the following procedure:

1. Set the

multimeter

resistance check mode.

2. Place the (-) terminal of the

multimeter

connector

on pins 1, 2, 5, 6 of

CN5

on the

TAMA

board.

3. Place the

connector board.

(+)

terminal on pin 2 of

CN7

on the

(GND)

TAMA

With power off, does the

multimeter

detect “00” ?

Finding

Yes

Solution

Check the carriage mechanism, and replace or reassembly the bad

patiS.

Replace the HP

sensor.

Replace the

carrfage motor.

Replace the carriage motor with

TAMA

board.

The

TAMA

be dead.

Rev.

boards may

Replace the

TAMA

board.

5-5

Troubleshooting

LX-105O+ Service Manual

Table 5-9. Paper is Not Fed (1)

Cause

The paper

end

sensor

may be dead.

The release sensor may be dead.

The paper feed motor may be dead.

Step

Does the sensor toggle?

‘

(Check with

Does the sensor toggle?

(Check

Disconnect board and cheek the coil resistance between: pin 12 and pin 10; pin

Checkpoint

multimeter)

with multimeter)

CN5 on the TAMA

and pin 10; pin 11 and pin 9; pin 7 and pin 9 (4 points total) on the disconnected cable side using a

multimeter.

Pin 12- Pin 10 Pin 8- Pin 10

Pin 11- Pin 9 Pin 7- Pin 9

Are the resistances of all four

points approximately 40 ohms?

If any coil is shorted, check the

paper feed motor drive circuit

the following procedure:

1. Set the resistance

multimeterto

check mode.

2. Place the (-) terminal of the

multimeter

connector

on pins 7, 8, 11, 12 of

CN5

on the

board.

3. Place the connector board.

With power off, does the

muitimeter detect “00” ?

(+)

terminal on pin 2 of

CN7

on the

(GND)

using

TAMA

Finding

Solution

Replace the paper end sensor.

Replace the

release sensor.

Replace the paper feed motor.

Replace the paper feed motor

with

TAMA

board.

The paper path may be bad.

5-6

—

Reassemble the

paper path.

Rev.

LX-105O+ Service Manual

Troubleshooting

Table 5-10. Paper is Not Fed (2)

Cause

The paper end sensor may be dead.

The release sensor may be dead.

The paper feed motor may be dead.

Checkpoint

Does the sensor toggle?

(Check with

Does the sensor toggle?

(Check with Disconnect

multimeter)

CN5

on the

TAMA

board and check the coil resistance between: pin 12 and pin 10; pin 8 and pin 10; pin 11 and pin 9; pin 7 and pin 9 (4 points total) on the disconnected cable side using a

muitimeter.

Pin 12- Pin 10 Pin 8- Pin 10 Pin 11- Pin 9

Pin 7- Pin 9 Are the resistances of all four points approximately 40 ohms?

If any coil is shorted, check the paper feed motor drive circuit using the following procedure:

1. Set the

multimeter

resistance check mode.

2. Place the (-) terminal of the

multimeter

connector

on pins 7, 8, 12 of

CN5

on the

TAMA

board.

3. Place the

connector board.

(+)

terminal on pin 2 of

CN7

on the

(GND)

TAMA

With power off, does the

multimeter

detect “CO” ?

Finding

Solution

Replace the paper end sensor.

Replace the release sensor.

Replace the paper feed motor.

Replace the paper feed motor with

TAMA

board.

The paper path may be bad.

Cause

The paper end sensor is dead.

Rev.

—

Table 5-11. Paper Out Displayed

Step

—

Checkpoint

Reassemble the paper path.

Finding Solution

—

Replace the

paper end

sensor.

5-7

Troubleshooting

LX-105O+

Table 5-12. Abnormal Voltage Displayed

Service Manual

Cause

The CR motor, PF motor or

printhead

coil

is short.

The

TAMA

board may

be bad.

Cause

The TAMA board

be bad.

may

Table 5-14. Incorrect RAM Inside CPU Displayed

Cause

The

TAMA baord WY

be bad.

Step

Connector disconnect, and power on.

Does printer not display abnormal

Checkpoint

CN5

and

CN8

Finding

voltage?

—

Table 5-13. Incorrect SRAM Displayed

Step

Checkpoint

—

Checkpoint

Finding

Yes

—

Solution

Replace CR motor, PF motor or

printhead.

Replace

TAMA

board.

Solution

Replace the

TAMA

board.

Solution

Replace

TAMA

the

board.

Cause

Connectors on the

printhead

maybe

disconnected.

Ink ribbon may be bad.

Printhead

maybe bad.

Table 5-15. Self-test is Abnormal

Step

Is connectors on the

disconnected?

Is printing OK after ink ribbon

replacement?

—

Checkpoint

printhead

Finding

Solution

Conneot

Yes connector on the

printhead.

Yes

—

Replace the ink ribbon.

Replace the

printhead.

5-s

Rev.

LX-105O+

Service Manual

Table 5-16. Self-test Printout has Poor Quality (1)

Troubleshooting

Cause

printhead

The may be broken.

The

printhead

wire

coil

short or open.

Step

Check the

Are wires OK? Check the

multirneter.

.(refer to figure 5-1)

Are coils short or open?

If any coil is shorted, check the

printhead

following procedure:

1. Set the

resistance check mode.

Checkpoint

printhead.

printhead

drive circuit using the

multimeter

2. Place the (-) terminal of the

muitimeter printhead TAMA

3. Place the

on collector of

drive transistor on the

board.

(+)

terminal on emitter of transistor on the

(GND)

With power off, does the

multimeter

detect “00” ?

coil resistance

TAMA

board.

Finding

Yes

Solution

Replace the

printhead.

Replace the

printhead.

Replace the

paper feed motor

TAMA

with

board.

Rev.

5-9

Troubleshooting

LX-105O+

Table 5-17. Self-test Printout has Poor Quality (2)

Service Manual

Cause

Paper feed mechanism

may be bad.

The paper feed motor may be dead.

Step

Check the paper feed mechanism gears and rollers.

Checkpoint

Are there OK?

Disconnect CN5 on the TAMA

board and

check the coil resistance

between: pin 12 and pin 10; pin 8 and pin 10; pin 11 and pin 9; pin 7 and pin 9 (4 points total) on the disconnected cable side using a

multimeter.

Pin 12- Pin 10 Pin 8- Pin 10 Pin 11- Pin 9 Pin 7- Pin 9

Are the resistances of all four

points approximately 40 ohms?

If any coil is shorted, check the

paper feed motor drive circuit using the following procedure:

1. Set the

multimeter

resistance check mode.

2. Place the (-) terminal of the

multimeter

connector

on pins 7, 8, 11, 12 of

CN5

on the

board.

3. Place the

connector board.

(+)

terminal on pin 2 of

CN7

on the

(GND)

With power off, does the

multimeter

detect “~” ?

TAMA

Finding

Solution

Replace or reassemble gears and rollers.

Replace the paper feed motor.

Replace the paper feed motor with

TAMA

board.

The

paper path may be

bad.

Table 5-18. Abnormal Printing in On-line Mode (1)

Cause Step

The

bi-directional

printing value may be

bad.

—

Reassemble the paper path.

Checkpoint

Finding

Solution

Adjust the

bi-directional

—

printing position. (Refer to chapter

5-10

Rev.

LX-105O+

Service Manual

Table 5-19. Abnormal Printing in On-line Mode (2)

Troubleshooting

Cause

Software setting may be bad.

Dip switch settings of printer may be bad.

Interface cable may be

bad.

TAMA board

The be bad.

Cause

may

Table 5-20. Abnormal

Software setting may be bad.

Dip switch settings of printer may be bad.

Interface cable may be bad.

Step

Checkpoint

Is it OK?

Change the interface cable. Does it print OK?

—

Printing

Checkpoint

in On-1ine Mode (3)

Is it OK?

Change the interface cable. Does it print OK?

Finding

—

Finding

Solution

Set the software settings.

Set the dip

switch settings.

Replace the

intetface

Replace the

TAMA board.

cable.

Solution

Set the software settings.

Set the dip switch settings.

Replace the interface cable.

The

TAMA

be bad.

board

may

—

Replace the

TAMA

board.

Rev.

5-11

Troubleshooting

LX-105O+

Service Manual

5.3.2 Unit Repair - TAMA Main Control Board

This section describes the problems related to the main control board (TAMA). The table below provides various symptoms,

likely

causes, and checkpoints. me checkpoints refer to waveforms,

resistance, and other values to be checked to evaluate the operation of each component.

Table 5-21. Repair of the TAMA Board

Symptom

The

printer

~oes

not

>perate

at all.

Condition

The +24V jead.

transistor Q1

(Q2)

Cause

3A is defective

3Aor

is defective.

Checkpoint

M IC

3A, check the input waveform

pin 5.

Solution

Replace IC 3A.

Replace 2C 3A or Q1

(Q2).

The

~ead.

+5V

SRI or transistor Q6 is defective.

Replace SRI or Q6.

5-12

Rev.

LX-105O+ Service Manual

Table 5-21. Repair of the TAMA Board (Continued)

Troubleshooting

Symptom

rhe

printer

joes

not

>perate

at all.

Condition

The

CPU is

not

operating.

cause

rhe

reset circuit

s not operating.

Selection of

mntrol

ROM is

~bnormal.

Checkpoint

Oheck

the voltage waveforms at the

E24V

and for the RESET signal.

Solution

+eplace

Q5.

3eplace IC 3C.

7AM

is defective

rhe

CPU is

jefective

—

check

for oscillator signal at either

~in

31 or pin 32 of the CPU

?eplace IC

~eplace

3D.

Troubleshooting

LX-105O+ Service Manual

Table 5-21. Repair of the TAMA Board (Continued)

e..--

Pfinr4itinn

Cause

Check~oint

Solution

!5-14

Rev.

LX-105O+

Service Manual

Table 5-21. Repair of the TAMA Board (Continued)

Troubleshooting

Rev.

5-15

Chapter 6

Maintenance

Table of Contents

6.1 MAINTENANCE

6.1.1 Preventive Maintenance . . . . . . . . . .

6.1.2 Lubrication and Adhesive Application

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

List of Figures

Figure 6-1. Figure 6-2.

Table 6-1. Lubrication andAdhesive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table 6-2. Lubrication Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Table 6-3. Adhesive Application Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Correct Adhesive Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lubrication Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

List of

Tables

6-1

6-1 6-1

6-2 6-3

6-1

LX-105O+

Service Manual

6.1 MAINTENANCE

Maintenance

Proper maintenance assures optimal and long-term printer perforrnan

occurrence of malfunctions.

Be sure to disconnect the printmfiom the power supply before maintenance. Do not apply thinner,

plastic components.

trichloroethylene,

or ketone-based solvents to any of the printer’s

ce and minimizes the

6.1.1 Preventive Maintenance

The case exterior should be regularly cleaned with alcohol. Occasionally vacuum clean the interior of the mechanism to remove accumulated dirt, dust, and paper particles.

After the unit has been cleaned, check that it is adequately lubricated (refer to Section 6.2, below). Before returning the printer to the customer, inspect the springs, paper-feed rollers, and the basic

operation of the unit.

6.1.2 Lubrication and Adhesive Application

EPSON recommends lubrication at the points illustrated in Figure 6-2. Table 6-2 provides a list of these points, and the recommended lubricant to be used for each. The lubricants--EPSON O-2, EPSON G-26, and EPSON G-37--have all been thoroughly tested and fully meet the needs of this printer. (Table 6-1 lists details of these lubricants.)

Before applying any lubricant, make sure that the part to be lubricated is clean. Do not apply excess lubrication, as this can potentially cause darnage.

Following its disassembly or replacement, adhesive must be applied to the part indicated in Table 6-3. EPSON recommends application of 6-1. When applying the adhesive, be careful that no excess overflows onto nearby parts.

Neji

lock #2 (G) adhesive to the point illustrated in Figure

Table 6-1. Lubrication and Adhesive

Type

Oil Grease Grease Adhesive

E: EPSON-exclusive product

Name Capacity

o-2 G26 40 gm G37 40 gm

Neji

lock #2 (G)

40 gm

Availability Parts No.

E E E E

B7102OOOO1

B702600001 B703700001

B730200200

Rev. A

s-1

Maintenance

LX-105O+ Service Manual

Table 6-2. Lubrication Points

Ref. No.

(1)

(2)

(3)

(4)

(5) (6) (7) (8) (9)

(lo)

(11)

(12)

Note:

Lubrication is

Lubrication Points

Contact portion of paper feed lever drive shaft and paper feed lever

Lubricant

G-26

Contact portion of paper feed lever drive shaft and base frame G-26

Oil pad

o-2

Contact portion of release lever and paper feed lever drive shaft G-26

Contact portion of adjust lever and side frame left G-26

Contact portion of adjust lever and side frame left

G-26 Contact portion of belt pulley and ribbon gear G-26 Contact portion of carriage and carriage guide plate Contact portion of tractor disengage cam and gear

Gear portion of the ribbon gear

Shall

which sets the ribbon gears

Paper feed

roller

shaft

necessaty

when assembling.

G-26

G-26 G-26

G-26

G37

Ref. No.

(21) (22)

Table 6-3. Adhesive Application Points

Adhesive Application Points

Where the timing belt engages the carriage

Contact portion

of side frame and paper guide

<To

Timing

Belt>

Figure 6-1. Correct Adhesive Application

No. of Points

6-2

Rev.

LX-105O+ Service Manual

Maintenance

Figure 6-2. Lubrication Points

Rev.

6-3

Appendix

Table of Contents

A.1

CONNECTOR SUMMARY

A.2

CIRCUIT DIAGRAM

A.3

CIRCUIT BOARD COMPONENT LAYOUT

A.4

EXPLODED DIAGRAM

List of Figures

Figure A-1. Figure A-2. Figure A-3. Figure A-4. Figure A-5. Figure A-6. Figure A-7.

Interconnection of Major Components . . . . . . . . . . . . . . . . . . . . . . A-1

TAMA Main Control Board Circuit Diagram . . . . . . . . . . . . . . . . . . A-5

TA-a Filter Unit Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7

Control Panel Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7

TAMA Main Control Board Component Layout. . . . . . . . . . . . . . . . A-8

LX-1050+ Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9

Printer Mechanism Exploded Diagram . . . . . . . . . . . . . . . . . . . . . A-10

List of Tables

A-1 A-5 A-8 A-9

Table A-1. Connector Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Table A-2. Connector Pin Assignment Table A-3. Connector Pin Assignment Table A-4. Connector Pin Assignment Table A-5. Connector Pin Assignment Table A-6. Connector Pin Assignment Table A-7. Connector Pin Assignment Table A-8. Connector Pin Assignment Table A-9. Connector Pin Assignment -

CN2 . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

CN3

. . . . . . . . . . . . . . . . . . . . . . . . . . A-3

CN4 . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

CN5 . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

CN6 . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

CN7 . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

CN8 . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

CN9 . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

LX-105O+

Service Manual

A.1 CONNECTOR SUMMARY

Appendix

Figure below shows the

TAPNL-W

Contrgrr~anel

intercomection

between the major components of the

Model 3D60 Printer Mechanism

Release

;; Inn::;

HOME HEAD

PE II II 4>

LX-105O+.

I I I

I I I I

-------

HOST COMPUTER

Figure A-1.

L ----------

Interconnection of Major Components

Rev.

A-1

Appendix

LX-105O+ Service Manual

Table A-1. Connector Summary

Connector

TAMA

I CN1 I

Main

Control Board

Parallel interface

CN2 CN3

Optional

Control panel

Description

interface board connector

Pins

36pin I Table 1-5

26 pin Table A-2

10 pin

CN4 Release lever 2 pin Table A-4 CN5

CN6 PE sensor

! CN7 I

Home Position sensor

CN8 Printhead

CR motor and PF

motor

CN9 AC voltage input

CN1O

TA-a Filter Unit

CN1

TAPNL-WControl Panel

I CN1 I

TAMAboard I lOpin

Not used 4 pin

AC voltage

output

12 pin

2 pin Table A-6

2Pin ] Table A-7

12 pin

4 pin

2 pin Table A-9

Table A-3

Reference

]

Table A-3

Table A-5

Table A-8 Table A-9

—

A-2

Rev. A

LX-105O+ Service Manual

Appendix

Table A-2. Connector Pin Assignment -

Pin No.

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

19 20 21 22 23 24 25 26

Signal Name

ERR PE D7 BUSY D6

ACK

D5 IN

ITRD4

STB

AC12

RESET

AC12

+5V

+24V D1 +12V Pls

—

SLCTIN GND

TxD

GND

o 0

I I I I

. 0

—

— I

—

I/o

Error Signal PE Signal Data Bit 7 BUSY Signal Data Bit 6

ACKNLG Signal

Data Bit 5

Initialize Data Bit 4 Strobe Signal Data Bit 8

GND

Reset Signal 12 Data Bit 3 +5 Data Bit 2 +24 Data Bit 1

+12

Parallel/Serial

—

SLCTIN GND

TxD GND

Description

VAC

VDC

Signal

CN2

Table A-3. Connector Pin Assignment -

Pin No. Sigrial

2 3 4

5 6 7 8 9

GND

LF FF SW ON

LIE SW

PE LP

ONLINE LP

READY

+5V

BUZZER

Name

LINE SW

—

I I I

o 0 0

—

GND

LF SW FF SW ON

LINE SW LOAD/EJECT SW PE LED drive

ON LINE LED drive READY LED drive

VDC

Buzzer drive

Table A-4. Connector Pin Assignment -

Pin No. I Signal Name I l/O

RELEASE

GND

—

RELEASE

GND

Description

CN4

Description

sensor

CN3

Rev.

A-3

Appendix

LX-105O+

Service Manual

Table A-5. Connector Pin Assignment -

Pin No.

2 3

5 6 7 8 9 10 11

Signal Name

CRD

CRB CRCDCOM

CRABCOM CRC

CRA

PFD PFB PFCOM PFCOM PFC PFA

0 0

0 0 0 0 0 0

I/o

CR Phase D CR Phase B CR CD Common

CRAB

CR Phase

CR Phase A PF Phase D PF Phase B PF Common PF Common PF Phase C PF Phase A

Table A-6. Connector Pin Assignment -

Pin No.

Signal Name

GND

—

I/o

Paper

GND

end

CN5

Description

Common

CN6

Description

Table A-7. Connector Pin Assignment -

Pin No.

Signal Name

HOME

GND

—

I/o

Home position

GND

Table A-8. Connector Pin Assignment -

Pin No.

2 3 4 5 6 7

10 11 12

Signal

H6 H8 H4

COM COM COM

H3 H5 HI H7

Name

I/o

o 0 0 0 0

— .

— o

0 0 0

Head drive signal 6 Head drive signal 8 Head drive signal 4

drive signal 9

Head

Head drive signal 2

Common Common Common

Head drive signal 3

Head drive signal 5

Head drive signal 1 Head drive signal 7

CN7

Description

CN8

Description

A-4

Table A-9. Connector Pin Assignment -

Pin No.

2 3 4

Signal Name l/O

AC1 AC1 AC2 AC2

— — — —

26 26

VAC VAC

CN9

Description

Rev. A

LX-105O+

Sewice Manual

INPUT

Figure A-3. TA-a Filter Unit Circuit Diagram

Appendix

“’J)

.O.lgF

LED I

Swl

SW2

200Q

SW3

SW4

401

GREEN

Figure A-4. Control Panel Circuit Diagram

LED2

LED4

)

GREEN

GND

ONLINE SW

FF SW

LF SW

LD/EJ SW

BUZZER

READY LP

ONLINE LP

PE LP

+5”

Rev.

A-7

Appendix

A.3 CIRCUIT BOARD COMPONENT LAYOUT

LX-105O+

Service Manual

-a

A-a

Figure A-5. TAMA Main Control Board Component Layout

Rev. A

LX-105O+

A.4

Service Manual

EXPLODED DIAGRAM

Appendix

Rev.

—

Figure A-6.

LX-105O+

Exploded Diagram

Appendix

LX-105O+

Service Manual

A-10

Figure A-7. Printer Mechanism Exploded Diagram

Rev. A

EPSON OVERSEAS MARKETING LOCATIONS

EPSON AMERICA, INC.

20770 Madrona Avenue,

P.O.

BOX 2842

Torrance, CA 90509-2642

Phone: (800) 922-8911 Fax: (310) 782-5220

EPSON UK LTD. Campus 100, Maylands Avenue,

Hemel

Hempstead, Herts. HP27EZ, U.K. Phone: 442-61144 Fax:

EPSON IBERICA,

Avda.

08290 Barcelona, Spain

Phone: 582.15.00 Fax:

EPSON AUSTRALIA PTY. LTD.

1/70

Chatswood 2067

442-227227

S.A.

de Roma, 18-26

Cerdanyola

582.15.55

Gibbes

del Vanes

Street,

NSW, Australia Phone: 02-415-9000 Fax:

02-417-0077

EPSON DEUTSCHLAND

Ztilpicher StraBe

F.R.

Germany

6,4000

GmbH

Dikseldorf

Phone: 0211-56030 Fax:

EPSON FRANCE 68 bis, rue

0211-504-7787

S.A.

Marjolin

92300,

Levallois-Perret, France

Phone: 1-4087-3737 Fax :

EPSON V. Ie F. 20099 Sesto S. Giovanni Ml, Italy Phone: 02-262331 Fax :

EPSON (SINGAPORE) PTE, LTD. No. 1 Raffles Place #26-00

1-47-371510

ITALIA

Ili Casiraghi,

02-2440750

S.p.A.

427

OUB Centre, Singapore 0104 Phone: 5330477 Fax:

5338119

EPSON HONG

KONG LTD. 20/F, Harbour Centre, 25 Harbour Road, Wanchai, Hong Kong Phone: 585-4600 Fax:

827-4346

SEIKO EPSON CORPORATION PRINTER DIVISION

80 Harashinden, Hirooka

Shiojiri-shi,

Nagano-ken, 399-07, JAPAN Phone: 0263-52-2552 Fax:

Telex: 3342-214

0263-54-4007

(SEPSON

EPSON ELECTRONICS TRADING LTD.

(TAIWAN BRANCH)

10F, No.287 Nanking E. Road, Sec. 3,

Taipei, Taiwan,

R.O.C.

Phone: 2-717-7360 Fax:

2-712-9164

As of January 1994

EPSON

Printed in Japan

94.04-.2-G

Epson LX-1050+ User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

PRECAUTIONS

PREFACE

REVISION SHEET

TABLE OF CONTENTS

General Description

1.2 SPECIFICATIONS

3.2 DISASSEMBLY AND ASSEMBLY

4.1 ADJUSTMENTS

TROUBLESHOOTING

Maintenance

Appendix