Epson LX300 User Manual

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EPSON TERM

NAL PR NTER

LX-300

SERVICE MANUAL

(

)

EPSON

PRECAUTIONS

Precautionary notations throughout the text are categorized relative to 1) personal injury and 2) damage to equipment.

DANGER

WARNING

The precautiomry measures itemized below should always be observed when performin 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.

grepair/

DANGER

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

2. NO

3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT

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.

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.

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.

3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT

BOARDS AND/OR INDIVIDUAL CHIPS.

IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE

STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN

ACCESSING INTERNAL COMPONENTS.

5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS

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

ICS

(YI’HER

- ii -

PREFACE

This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of LX-300. 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

follows:

CHAPTER 1. PRODUCT DESCRIPTION

Provides a general product overview, lists specifications, and illustrates the main components of the

CHAPTER 2. OPERATING PRINCIPLES Describes the theory

of printer operation.

CHAPTER 3. DISASSEMBLY AND ASSEMBLY

Includes a step-by-step guide for product d

isassembly

and assembly.

CHAPTER 4. ADJUSTMENTS

Includes a step-by-step guide for adjustment.

organizd

pMter.

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

. . . . . .

(

( j

Revision

Rev. A

Issue Date

April

6, 1994

Revision Page

1st

issue

-v-

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

PRODUCT DESCRIPTION OPERATING PRINCIPLES DISASSEMBLY AND ASSEMBLY ADJUSTMENTS TROUBLESHOOTING MAINTENANCE

- vi -

CHAPTER 1 Product Description

Table of Contents

1.1 FEATURES

1.2 SPECIFICATIONS

1.2.1 Hardware Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2.1.1 Paper Handling Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2.1.2 Paper Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2.1.3 Printable Area.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2.1.4 Ribbon Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2.1.5 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2.1.6 Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2.1.7 Reliability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2.1.8 SafetyApprovals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2.1.9 Physical Specifications . . . . . . . ...’..... . . . . . . . . . . . . . . . . .

1.2.2 Firmware Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 INTERFACE SPECIFICATIONS

1.3.1 Parallel Interface Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

1.3.2 Serial InterfaceSpecifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 OPERATING INSTRUCTIONS

1.4.1 Control Panel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

1.4.2 Self-test Function. . . . . . . . . . . . . . . . . . . . .

1.4.3 Hexadecimal Dump Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.4.4 PrinterStatus Indication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.4.5 Selected Font . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.4.6 Paper Position Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.4.7 Printer Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

1.4.7.1 Hardware Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

1.4.7.2 Software Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

1.4.8

PrinterSettings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

1.4.8.1 Selectable

1.4.8.2 Changing the

PrinterSettings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

DefaultSettings. . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

. . . . . . . . . . . . . . . . . . . . 1-15

1-1

1-2

1-2 1-3 1-4 1-5 1-7

1-8 1-8 1-8 1-8 1-8 1-9

1-11

1-13

1-14

1.5 MAIN COMPONENTS

1.5.1

1.5,2 C130

Ct30

MAIN Board. , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

PSB/PSE Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

1-21

List of Figures

.P.::k

(’.

Figure 1-1. Figure 1-2. Figure 1-3. Figure 1-4. Figure 1-5. Figure 1-6. Figure 1-7. Figure 1-8. Figure 1-9. Figure 1-10.

Exterior View of the LX-300. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Pin Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

PrintableArea forCut Sheets Using Manual Insertion. . . . . . . . . . . 1-5

Printable Area for Cut Sheets with the CSF. . . . . . . . . . . . . . . . . . .

PrintableArea forContinuous Paper . . . . . . . . . . . . . . . . . . . . . . . . 1-6

PrintableArea

Data Transmission Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11

Panel Appearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

C130 MAIN Board Component Layout. . . . . . . . . . . . . . . . . . . . . . 1-21

C130

PSB/PSE

forRoll

Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Board Component Layout . . . . . . . . . . . . . . . . . 1-21

1=6

List of Tables

Table l-1. Optional Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Table 1-2. Feeding Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Table l-3. Adjust LeverSettings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Table 1-4. Specifications for Cut Sheet Paper (Manual Insertion) . . . . . . . . . . . 1-4

Table 1-5. Specifications for Cut Sheet Paper

Table l-6. Envelope Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Table 1-7. Specifications for Continuous Paper (Single Sheet and Multi-Part) . 1-4

Table 1-8. Specifications for Continuous Paper with a Label. . . . . . . . . . . . . . . 1-5

Table l-9. Roil Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Table l-10. Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Table 1-11,

Table 1-12. Table 1-13. Table 1-14,

Table

Table 1-16.

Table 1-17

Table 1-18

Table 1-19

Table 1-20

Table 1-21

Table

Table 1-28. Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

Table 1-29. Bit Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

Table 1-30. Parity Bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

Table 1-31. Data Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

Table 1-32.

1-15

Environmental Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Character Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Printing Speed.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Signal and Connector Pin Assignments for the Parallel Interface. 1-12 Signal and Connector Pin Assignments for the Serial Interface . . 1-13

Font Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15

Font Lights and Language Selection. . . . . . . . . . . . . . . . . . . . . . . 1-17

Default Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

Character Spacing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

Shape of Zero. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

-22

Skip Over Perforation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

-23

Character Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

-24

Auto Line Feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

-25

Page Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

-26

Auto Tear Off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

-27

Tractor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

EWACK.

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

(CSF). . . . . . . . . . . . . . . . . . . . . 1-4

l-2o

‘:”””

LX-300 Service Manual

1.1

FEATURES

Product

Daadption

The LX-300 is a small, light-weight, 9-pin

personal use. The major features of this printer areas follows:

Fast printing of

Compact design saves precious workspace

Easy-to-operate panel

Quiet printing

Standard 8-bit parallel interface and

Printing of up to 66 lines on

Optional color printing usinga color ribbon (black, magenta, cyan, yellow)

Detachable push and pull tractor

Figure 1-1 shows an exterior view of the LX-300 and Table 1-1 lists the optional units available for

the LX-300.

Edge guties

Power

YA&

10-cpi

draft characters at 220 cps

A4-size

or 62 lines on letter-size paper

~p”perwppof’s

serial

EIA-232D

impact dot-matrix color printer suitable for

serial interface

lease r

feed b

Model

#8750

#8758

S015073

C80837*

.. ./,

Pfintercover

Sprocket unit

Paper

#/<

Jpport

/’=

Troctof

Figure 1-1. Exterior”View of the LX-300

Table 1-1. Optional Units

Description

Ribbon cartridge (monochrome) Ribbon cartridge (monochrome,

Ribbon cartridge (color)

Single-bin cut sheet feeder

sub-mtridge)

Print head

Rev. A

C83208*

I C80030* [

#8310

Color upgrade kit

Pulitractorunit

Roil paper holder

1-1

Product Description

LX-300

Sarvice Mimual

1.2 SPECIFICATIONS

This section provides detailed information about the LX-300.

1.2.1 Hardware Specifications

Printing method: Pin configuration: Pin diameter:

Serial impact dot matrix 9 wires

0.29

: f

/- :.,,

Printing direction:

Figure 1-2. Pin Configuration

Bidirectional with logic seeking for draft text with monochrome printing. Unidirectional printing for graphics, NLQ text, bit image, and color printing.

1-2

Rev.

LX-XXI Sarvka

Manual

Product Description

1.2.1.1 Paper

Feeding system: Feeding method

Cut sheets:

Continuous paper:

Feeding pitch:

Paper paths

Cut sheet path: Continuous paper paths:

Continuous paper parking: CSF:

Paper-feeding speed:

Handling Specifications

Feeding

Friction Tractor (single)

Friction feed or tractor (push and pull) feed

Manual insertion (top entry) and feeding with the optional cut sheet feeder Push and pull tractor feeding

li~ in~, 1A in~, or pr~ammable

%16 inch, minimum

Top entry (manual insertion or the

Rear entry (push tractor feed) Rear entry (pull tractor feed) Possible, using push tractor Single bin, manual insertion using optional

See Table 1-2.

Table 1-2. Feeding Speed

l/G

inoh

Line Feed

rns/line

2.78

(CSF)

feeding in

optioml CSF)

in~ments

CSF

Continuous Feed

incheskecond

(top entry)

2.08

Tractor (double)

Friction feed

●

Set the release lever to the friction . When a sheet is inserted into the .

Donotperform

Push tractor feed

. Set the release lever to the tractor position. .

Donotperform reverse feeds greater than O.27 inch (6.8 mm).

. During printing ofiabels, never perforrnreverse feeding. . After printing labels, do not eject them from the rear.

Pull

tractor feed

0 Remove the tractor unit from the push position and mount it in the pull position.

●

Do not perform reverse feeding.

The adjust lever must be set to proper position for the paper thickness, as shown below.

reverse feeds greater than

96 redline

msition.

t;p

slot, place its left edge at the marked position.

O.27inch(6.8

mm).

inoheakxond

Table 1-3. Adjust Lever Settings

Lever Position Paper Thickness

0.065

mm -0.16 mm

0.16 mm -0.25 mm (0.0063 in. -0.0098

(0.0026 in. -0.0063

in.)

Rev. A

0.25

mm -0.48 mm

(0.0098 in. -0.0189 in.)

Product Description

LX-WI

Service Manual

1.2.1.2 Paper Specifications

Table 1-4. Specifications for Cut Sheet Papar (Manual Insertion)

Width Length Thickness Weight

Quality

182 mm -257 mm (7.2 in. -10.1 in.) 182 mm -364 mm (7.2 in. -14.3 in.)

0.065 mm -0.14 mm (0.0025 in. -0.0055

52.3-90 Plain paper, recycled paper

Table 1-5. Specifications for Cut Sheet Paper

Size

Thickness

Weight

QuaMy

A4 (W x L: 210 mm (8.3 in.) x 297 mm (11.7 in.)) Letter (’W x L: 216 mm (8.5 in.) x 279 mm (11.0 m.))

0.065 mm -0.14 mm (0.0025 in. -0.0055

64-90

Plain paper, recycled paper

Table 1-6. Envelope Specifications

Size

NO.6 No.1O Width 240 mm x Length 104 mm (9.5 in. x 4.1 in.)

in.)

g/m2

(14 -24 lb.)

(CSF)

in.)

@m*

(17 -24 lb.)

Width 166 mm x Length 92 mm (6.5 in. x 3.6 in.)

,..

‘-’;

Thickness Weight Quality

Notes:

Printing of envelopes is guaranteed only when the temperature is room temperature

and humidity is normal (15 - 25° C (59 - 77” F), 20-

●

Variations in envelope thickness must be less than 0.25 mm (0.0098 in.).

●

When inserting envelopes, keep the longer side horizontal.

0.16 mm - 0.48 mm (0.0063 in. -0.019 in.) 45-90

Bond paper (not curled, folded, or crumpled), plain paper, airmail paper

g/m2

(12 1-24 lb.)

&l’Y. RI-I).

Table 1-7. Specifications for Continuous Paper (Single Sheet and Multi-Part)

Width

Total thickness

Weights copies

Quality

101.6 mm - 254 mm (4.0 in. - 10.0 in.)

0.065 mm- 0.25 mm (0.0025 in. -

52.3- 82

40- 58.2 3 sheets (1 original + 2 copies)

Plain paper, recycled paper, carbonless multi-part paper

g/m2

14-22 lb. — not multi-part

g/m2

12 - 15 lb. — multi-part

[

)

0.0098in.)

(“:.

Rev. A

LX-300 Service Manual

Table 1-8. Specifications for Continuous Paper with a Label

Prvduct

Description

Label size (W x L) Width of base paper Thickness of base

paper Total thickness Weight

Quality

Notes:

●

Use only continuous-type labels and use them only with the tractor.

●

Example of labels

●

Printing of envelopes is guaranteed only when the temperature is room temperature

63.5 mm (min.) x 23.8 mm (min.) [ 2.5 in. (min.)

101.6 mm -254 mm (4.0 in. x 10.0 in.)

0.07 mm - 0.09 mm (0.0028 in. - 0.0035 in.)

0.16 mm - 0.19 mm (0.0063 in. -0.0075 64g/m2(17 lb.)

Plain paper

and humidity is normal (15 - 25° C (59 - 77° F), 20-

Table 1-9. Roll Paper Specifications

Width

Diameter 127 mm Thickness Weiaht

213 mm -219 mm (8.38 in. -8.62 in.)

0.070 mm -0.090 mm (0.0028 in. - 0.0035 in.)

I 52-

64a/m2

in.)

— Avery Continuous Form Labels — Avery Mini-Line Labels

(5.0

in.)

(14

-17

lb.)

6(YXO

15/16 in. (min.)]

RI-l).

1.2.1.3 Printable Area

Cut

shaets

using manual

insartion

1%], nym.m

—

[0.12’].

Ilirimbm

. . . . . .

Printable Area

209.2 mm

,.. - . . ,

10~. MEximum

XYz

)wz

-J

Rev.

Figure 1-3. Printable Area for Cut Sheets Using

Manual Insertion

1-s

Product Description

LK300

Service Manual

Cut Sheets Using the

(XF

3 mm

10.12”1.

Figure 1-4. Printable Area for Cut Sheets

mm,mum

Using the CSF

Continuous paper

101.6

t-m-n

2S4 nun

[4” -

10~, masinwm

0 0 0 0 0

0 0 0 0 0 0

0 0 0 0 0

0 0 0

o 0 0 0 0 0 0

0 0 0 0 0

o 0 0

PfintaM9

Area

0 0 0 0 0 0 0 0 0 0 0 0 0

0 0 0 0 0 0

0 0 0 0 0

0 0 0 a o 0 0 0 a o

a a a a

a a

—

f“’.

.;.

“ 13 mm (0.51”) or more

(1. W) w

whm ppar wid?h

mwe

when w

of 101.6 MM (4-) to 241.3 mm (9.5-) is

w+dth of 2S4

(10.)

usad.

usd

Figure 1-5. Printable Area for Continuous Paper

Rev.

LX4tW

Roll paper

Service Manual

Prvduct

Description

[0.12”

minimum

213 mm -219 mm [8.38’ - 8.62’]

203.2 mm

Printable Area

[8’J

maximum

)

‘ 9.8

(0.39”) or more

Figure 1-6. Printable Area for Roll Paper

1.2.1.4 Ribbon Specifications

Ribbon cartridge (mono):

Ribbon cartridge (color): Ribbon color: Black ribbon life:

Color ribbon life

Black: Magenta: Cyan: Yellow:

#8750 #8758

S015073 Black, magenta, cyan, yellow 3 million characters (14 dots/character)

1 million characters (14 dots/character)

0.7 million characters (14 dots/character)

0.5 million characters (14 dots/character)

when a

paper widthof216 f 3

(sub-cartridge)

mm is

used.

Rev.

1-7

Product Description

1.2.1.5 Electrical Specifications

Table 1-10. Electrical Specifications

LX-300 Service Manual

Description

Rated voltage

Input voltage range

Rated

frequency range Input frequency range Rated current Power mnsumption

Insulation resistance

(applying 500

1000

Dielectric strength

VAC

(&~O~v:~C~&d~~~s)

1.2.1.6 Environmental Conditions

Table 1-11.

Description

Temperature

5to 35° c (41 - 95° F) (*1)

120 V Version

120

VAC

103.5-132

VAC

49.5 -60.5 Hz

1.0 A 30 W (self-test in 10 cpi draft)

10 MQ, minimum

VDC

hne

and chassis)

between

ma for 1 minute or

Envh’onmental

Operating

220-240 V Version

50-60 Hz

(a~A~~{e and

1500

(between AC

Conditions

–20to 55° c (-4 - 131° F) (*2)

220-240 198-264

0.5 A

1.0 MK2,

minimum

500

VAC rrps

Storage

VAC VAC

VDC

between

CkSSIS)

for 1 minute

hne

and

chasa.s)

Humidity

Resistance to vibration

30 to 80% RH (*1,*3)

0.25 G, 55

(*1)

*1= Operating conditions must be within this range. *2= When the printer is in the shipping container. *3 = Without condensation.

1.2.1.7 Reliability

4000

M’T’BF:

Printhead life:

power on hours

200 million strokes/wire (with monochrome ribbon)

100 million strokes/wire (with color ribbon)

1.2.1.8 Safety Approvals Safety standards:

U.S. version: European version:

Radio frequency interference:

(RFI)

U.S. version: European version:

1.2.1.9 Physical Specifications

5 to 85% RH (*2,*3)

0.50 G, 55 Hz (*2)

(POH)

UL1950 with D3, EN 60950

CSA22.2

#950 with D3

IEC950 (SEMKO, DEMKO, NEMKO,

FCC part 15 subpart B class B

Vfg.243 (VDE0878 EN55022 (CISPR

part 3, part 30)

PUB. 22) class B

[;’

SETI)

Dimensions (W x

Weight:

D x H):

366 x 275 x 132 (mm) (14.4 x 10.8 x 5.20 (inches)

(without pull tractor) 4 kg (8.8 lb.) without pull tractor

Rev.

, :;

. .,

LX-3(M

Service Manual

1.2.2 Firmware Specifications

Ptvduct Lkacription

Control codes:

Input data buffer: Character sets: Character tables:

ITALIC

PC437 PC850 PC860 PC861 PC863

PC865 BRASCII Abicomp

PC852

EsC/r 4KB 13 international character sets See the table below.

Table 1-12. Character Tables

Character Table

(US, Standard Europe) (Multilingual) (Portuguese)

(Icelandic)

(Canadian-French)

(Norwegian)

(East Europe)

Standard Model

o o o o

o o

NLSP* Model

0 0 0

x x x x x

PC853 PC855 (Cyriliic) PC857 PC866 PC869 PC437

ISO

Code MJK

MAZOWIA (Polland)

Bulgaria (Bulgaria)

Bitmap fonts:

Character size

(Turkish)

(Russian) (Greek) Greek

Latin IT (Turkish)

8859-7

Suppofted

N~P=

(Greek)

(Czecho,

Slovakia)

X Not supported

National Language Support

EPSON EPSON EPSON

10.5 points

NLQ

Roman

NLQ

Saris Serif

DRAIT

x x x

x x x x

o o

Character matrix

Print mode

Draft mode:

NLQ

mode:

Printing speed: Printable columns:

Rev.

Draft 10

NLQ

cpi;

11 horizontal dots, 9

cpi;

23 horizontal dots, 18 vertical dots

Double-width Double-strike Super/subscript Double-width

Italics See Table 1-13. See Table 1-13.

vertid

Condensed Underlined

Emphasized Super/subscript

dots

Emphasized Italics

Underlined

1-9

Product Description

Printing Mode

Table 1-13. Printing Speed

Ch~m&:er

Printable Columns

Monochrome Color

LX-W)

Maximum Print Speed

Service

[cps]

Mhnual

(

‘x:

,:’

Notes:

10 12

17.1 20

5 cpi

10 12

cpi

cpi cpi

cpi cpi cpi

cpi cpi

characters corresponding tohexcodes BO to DFand F4

Draft Draft Draft condensed Draft condensed Draft emphasized

Draft double width

NLQ NLQ NLQ

double width

Data in parentheses indicates the speed on a line containing at least one of the following:

- A line containing a userdefined character.

- A

linecontaining oneofthe50

and F5.

- A line that is printing when printhead driving voltage drops from over-duty printing. (When voltage drops below the lower limit, the printer stops printing in the middle of the line, and then prints the rest of the line at a slower speed.)

80 96

137

160

80 40 80 96 40 22 (16)

220 (165) 264 (198) 198 (198)

188 (141)

220 (165)

110 (83) 110 (83)

165 (1 65)

44 (33) 53 (40)

Table 1-14. Resolution

Printing Mode

Horizontal Density

Vertical Density

Adjaoent

Dot

Draft Draft condensed

Draft emphasized

NLQ

Bit image

120 240 120 240

60 72 80

90 120 120

240

dpi dpi dpi

dpi dpi dpi dpi dpi

dpi

72 72 72

144

72 72

dpi dpi dpi

dpi dpi dpi dpi

dpi

dpi dpi

No No

Yes

Yss

Yes Yes Yes Yes

No No

~.:?”;,

‘---

1-10

Rev. A

LX-3(3O Service Manual

1.3 INTERFACE SPECIFICATIONS

Prvduct

Description

LX-300

has parallel interface and serial interface, one of which can be selected in default setting

mode. Auto selection is also available.

1.3.1 Parallel Interface Specifications

The LX-300

Data format: Synchronization:

Handshaking:

Signal level:

Adaptable Data transmission timing:

is equipped with an 8-bit parallel interface, standard.

8-bit parallel

SIROBE pulse

comectm

By BUSY and

TTL-compatible

%-pm 57-30360

ACKNLG

level

See Figure 1-7.

BUSY

ACKNLG

DATA

SyIIChrOIliZZItiOll

signals

(Amphenol)

or equivalent

STROBE —

—

0.5 ps (minimum)

0.5

(minimum)

0.5

IIS

(minimum)

Figure 1-7. Data Transmission Timing

Note:

The Busy signal is active (HIGH) under the following conditions:

The ERROR signal is active (LOW) under the following conditions:

Transition time (rise time and fall time) of every input signal must be less than 0.2

- During data reception (See Figure 1-7.)

- When the

innt

buffer is full

- When the INIT input signal is active

- During initialization

- When the ERROR signal is active

- During the self-test mode

- During the default-setting mode

- When a paper-out error occurs

- When a release lever operation error occurs

- When a fatal error occurs

The PE signal is active (HIGH) under the following conditions:

- When a paper-out error occurs

Rev. A

1-11

-1 . .

—-

[

}..

I I

and signal functions for the 8-bit parallel interface.

Pin Assignments for Parallel Interface

Description

The STROBE pulse is used to read the input data. The pulse width must be more than

Input data is latched after the falling edge of this

signal.

Parallel input data to the printer.

A HIGH level means data 1. A LOW level means data O.

0.5 p.s.

. . .

.—

— .-. .

..—

This pulse indicates data has been received the printer is ready to accept more data. The

pulse width is approximately 12 pa. HIGH indicates the printer cannot accept more

data.

HIGH indicates

rm~er-out.

This signal is effective

only when the ERROR signal is LOW.

Always HIGH output. (Pulled up to

3.3

resistor.)

+5V

through

If the signal is LOW when the printer is initialized a line feed is automatically receipt of the CR code (auto

Not

USed.

. .

Signal ground.

petformecf

upon

LF).

Chassis ground.

—.

In the printer, chassis ground and signal

ground

are short-circuited.

HIGH level means that printer power is on.

—

Signal ground.

Input for printer initialization. Pulse width 50

minimum, active LOW. LOW indicates that some error has occurred in

the printer.

and

. . .

.: !

Signal ground.

-..

Pulled up to Ignored.

. .

~~ ~~•

f$e

s@f@ as

.,,

. .

+5V

viewed

through 1 KQ resistor.

from the

@ter.

Rev. A

LX-3(IO Service Manual

1.3.2 Serial Interface Specifkations

The LX-300 is equipped with an 8-bit serial interface, standard.

Product Description

Data format: Synchronization: Handshaking:

Busy Ready

Word length

Start bits: Data bits: Parity bit: Stop bits:

Bit rate:

State

Busy Ready

EIA-232D

serial Asynchronous By

DTR

signal and X-ON/X-OFF protocol

DTR

and X-OIVX-OFF Protocol

Buffer Space

Less than 256 bytes

More than 512 bytes

ETX/ACK Protocol

State

1 bit 7 or 8 bit (selectable) O or 1 bit (selectable)

bit (transmitting)

1 bit or more (receiving)

300,

Buffer

Less than 256 bytes 256 bytes or more

6(X),

1200,2400,4800,9600, 19200 bps (selectable)

Spaoe

DTR

off On

X-OWX-OFF

X-OFF

X-ON

Response Code

NAK ACK

Logic level

MARK (logical 1): SPACE

(logical

O):

–3 V to –25 V

v to

+-25

Parity check: Odd, even, or no parity bit (selectable)

EIA

Connector:

standard 25-pin D-SUB female comector

Table 1-16. Signal and Connector Pin Assignments for Serial Interface

the

110*

—

out

—

out

—

djrectkm d

Description Chassis ground. Transmit

seriil

data.

Receive serial data.

This signal is

always at the positive

EIA

level. Ignored. Return path for data and control signals.

This signal is at the positive

EIA

level when the printer is ready to accept data entry and at the negative when the printer is not ready to

accep

t data entry.

No connection (not used).

the

sjgnal as vjewed

from the

printec

Pin No.

2 3 4 5 7

11,20

6,8-10,12-

19,21-25

●

The

//0 column irxbtes

Signal Name

TXDJSD RXDIRD

RTS/RS

CTSVCS

DTWER

EIA

level

Rev.

1-13

Product Description

UiWtJ

Service

Mhnual

1.4 OPERATING INSTRUCTIONS

This section describes control panel operation

~ctions,

demonstration functions, and printer initialization methods.

self-test, hexadecimal dump, ~n ~

1.4.1 Control Panel Operation

The printer control panel contains three non-lock-type push buttons and three LED easy operation of the various printer functions.

Lights

Roman O O

SerifO ●

Saris

Draft.

Draft Condensed. ● I

I W W

Micro Adjust

Font

●

Buttons

3sec

indimtors

Figure 1-8. Panel Apperance

Light

for

.“

,, .

“II

Paper Feeding Load: Load (manual insertion):

Line feed: Eject cut sheet: Form feed (continuous): Paper park (continuous): Tear-off (continuous):

Character Selection Font selection: Pitch selection: Condensed selection: Enter

Speaal

Mode

Self-test mode:

Default-setting mode: Hex dump mode: Demonstration mode:

Press the Press the

LF/FF

button.

LF/FF

button or the printer waits 2 seconds after insertion

of a cut sheet to load paper automatically. Press the

Hold down the Hold down the Press the FONT and

LF/FF

button once.

LF/FF LF/FF

button continuously. button continuously.

LF/FF

buttons at the same time.

Only uses auto tear-off function.

Press the FONT button. Selectable indefault-setting mode: 10

cpi.

or 12

cpi.

Press the FONT button. Only draft condensed is selectable.

Hold down the

LF/FF

button and turn on the printer. Hold down the FONT button and turn on the printer. Hold down the

LF/FF

and FONT button and turn on the printer. Not available.

~..,,

1.4.2 Self-test Function

This section explain how to run the self-test.

Hold down the

2. If paper is not loaded, the printer attempts to load it.

3. If the printer insert paper again and press the

4. The printer prints alphanumeric characters continuously.

5. Quit self-test mode printing by pressing the PAUSE button and turning the printer off.

1-14

LF/FF

button and turn on the printer to start the self-test.

camot

load paper, it indicates this by turning on the PAUSE light. In this case,

LF/FF

button.

Rev.

LX#O

Service Manual

Pfvduct LMacription

1.4.3 Hexadecimal Dump Function

The hexadecimal dump is a useful tool for troubleshooting data control problems. This section describes how to run a hex dump.

Turn on the printer while holding down the

LF/FF

and FONT buttons.

2. If paper is not loaded, the printer attempts it (either single sheet or continuous paper).

3. If the printer cannot load the paper, it indi~tes a paper-out error. In this

case, insert

paper

again, and press the PAUSE button.

4. The printer waits for data after printing the message “Hex dump.”

5. Received data is printed as both hexadecimal codes and ASCII characters. If a corresponding printable character does not exist, the printer outputs a period (.).

Quit

Note:

hexadecimzd

hex dump mode, the character table depends on the default

dump printing by pressing the PAUSE button and tumingtheprinter off.

settin&

and 10

cpi

draft is

selected automatically.

1.4.4 Printer Status Indication

It describes how this printer indicates status and error conditions using

LEDs

The symbols below describe the frequency of beeper sounds.

( ● ):

(—): The beeper sounds

While initialize signal is active:

During initialization: Ready to print or printing: Paper-out error:

Tear-off: Operating error, fatal error:

The beeper sounds

for5~mswithan

tbr

100 rns with an interval of 100 ms between beeps.

interval

of100ms

between beeps.

PAUSE light is on. PAUSE light blinks and beeper sounds PAUSE light is off Beeper sounds (

(light

on:off

PAUSE light blinks (light Beeper sounds (

● ●

. )

and PAUSE light blinks.

ratio=

6:1)

on:off

ratio=

————— ) and PAUSE light is on.

1.4.5 Selected Font

The combination of two FONT

LEDs

(1 and 2) is used to indicate the selected font.

Table 1-17. Font Selection

Selected Font

Roman Saris Serif Draft

FONT 1

ON ON ON

OFF

FONT 2

OFF

and the beeper.

1:6)

Draft condensed

OFF OFF

1.4.6 Paper Position Adjustments

To enter adjustment mode, press the PAUSE button for three seconds, until the printer beeps once and the FONT lights blink to indicate that the adjustment operation is available. If the printer state

is not one of the conditions shown below, this operation is ignored.

. TOF position adjustment:

The position mn be adjusted just after the paper is loaded.

. Tear-off position adjustment:

The position can be adjusted when paper is actually located at the tear-off position.

In the adjustment mode, press the feed paper backward. You can cancel adjustment mode bypressingthe PAUSE button or inputting a print command.

Rev.

The

adjusted position is stored in non-volatile memory.

LF/FF

button to feed paper forward and the FONT button to

1-15

LXiWO

Product Description

Service Manual

1.4.7 Printer Initialization

There are two types of initialization: hardware initialization and software initialization.

1.4.7.1 Hardware Initialization

Hardware initialization is performed by: . Turning on the printer. .

Sendiny@e parallel interface

(If the INIT signal is active when the printer is turned on, hardware initialization is started when the

signal becomes

When hardware initialization is performed:

. The printer mechanism is initialized. . Print data in the input buffer is cleared. . Download character definitions are cleared. . The printer’s settings are returned to the defaults. . The printer is set to the standby condition, if no fatal error occurs. . Continuous paper home-seeking is performed.

In continuous paper home-seeking: . The printer feeds continuous paper to the paper park position.

●

The printer then loads the paper again.

●

If ejection to the paper park position cannot be completed within 16 inches, paper is returned to its previous position.

the~signal.

imctive.)

1.4.7.2 Software Initialization

Software initialization is performed upon receipt of the control code

initialization is performed: . Print characters in the buffer are not cleared.

. The printer setting is changed to the default, but the download character definition is not cleared.

ESC C?.

When software

1.4.8 Printer Settings

1.4.8.1 Selectable Printer Settings

The following printer settings can be changed by users in default-setting mode:

.lQc@

Character spacing: Shape of zero:

1 inch skip-over-perforation: Auto line feed: Character table (Standard):

Character table

(NLSP):

Page length:

/ 12cpi

Slashed / Not slashed

on/Qff on/Qff

Italic

(JJSA/France/Germany/UK/Denmark l/Sweden/Italy/

Spain

1)/PC437/850/860

Italic

&?SA/France/German

Spain

1)/KG7/~/S2/8S/E5

/861/863

/865/BRASCII/Abicomp

k l/Sweden/Italy/y/UK/Denmar

/857/=/869/07

Greek/ISO

Latin IT /1S0 8859-7/Code MJK/Mazowia/Bulgaria 11/ 12/ 8.5 / 70/6 inches

.. . .

... -

Auto tear off: Tractor: interface:

Bit rate (serial I/F): Parity bit (serial I/F): Data length (serial I/F): ETX/ACK (serial I/F):

Note:

Underlines show factory setting.

1-16

on/Qff Single

/ Double

~/ Auto selection (30 sec wait) / Parallel

/ Serial

300 / 600/ 12(MI / 2400 / 4800 /

Mm/ Z.Ms

Odd / Even

/ 8 bits

/ Enabled

$?6Ul

/ 19200 bps

Rev.

LX-300 Service Manual

Product Description

1.4.8.2 Changing the Default Settings

You can change some parameters that the printer refers to at printer initialization.

To enter the default setting mode, turn on the printer while holding down the FONT button.

1. The printer prints out the firmware version.

If paper is not loaded, insert a sheet of paper.

2. The printer automatically loads the paper and prints a table of languages to choose from: English, French, German, Italian, and Spanish. The Footlights indicate the currently selected

language, as shown in the table below.

Table 1-18. Font Lights and Language Selection

FONT Light 1

OFF OFF

ON ON ON

Press the FONT button to change the language, and press the LF/FFbutton to select.

FONT Light 2

Blinks

OFF

Blinks

Language

English French German Italian Spanish

4. Press the FONT button again after selecting a language. The printer prints help text to guide you in setting defaults. The pMted instructions include submenu tables listing all the settings you can change and showing you how the

5. To change the settings, press the FONT button to move down and press the

mntrol

panel lights appear for each selection.

LF/FF

button to move up in the menu of options shown below. The printer beeps once each time you press the FONT button while you are in this menu.

Table 1-19. Default Options

FONT Light 1

Blinks

Biinks

OFF

Blinks

Biinks

Blinks

OFF

Blinks Biinks

OFF OFF

Biinks

When you reach the setting you want to change, press the PAUSE button once. The printer

FONT Light 2 PAUSE Light

OFF

Biinks

Blinks Blinks

OFF

OFF OFF OFF OFF

ON ON Blinks Blinks

ON ON ON

Biinks

OFF OFF

Biinks

Character spacing Shape of Skip over perforation Character table Auto line feed

Page Auto tear off

Tractor

Interface Bit rate Parity Data length

ETWACK

Setting

zem

iength

automatically enters the submenu for that setting. Press the FONT button to move the through the settings in the submenu. The printer beeps

twice each time you press the FONT button while in a submenu. When the lights match your desired

settin~

press the PAUSE button to make your selection.

The printer saves the new setting and returns to the menu shown above. Repeat steps 5 through 8 for each additional setting you want to change, or skip to step 10 to

exit the printer’s

defauit

setting mode.

Submenu

Table 1-20 Table 1-21 Table 1-22

Tabie

1-23

Tabie

1-24

Table

1-25

Tabie

1-26 Table 1-27 Table 1-28

Table 1-29 Table 1-30

Tabie

1-31

Table

142

10.

When you are finished, turn the printer off. Any settings you have made remain in effect until you change them again.

Rev.

1-17

Product Description

Table 1-20. Character Spacing

LX300

Service M%ual

FONT Light 1

FONT

FONT Light 1

OFF

FONT Light 2

OFF

Light 1

FONT Light 2

OFF

Table 1-22. Skip Over Perforation

FONT Light 2

OFF

FONT Light 2

OFF

Character Spacing

cpi

OFF

PAUSE Light

OFF

Table 1-21. Shape of Zero

PAUSE Light

OFF

PAUSE Light

OFF

ON ON

OFF

Space of Zero

SkipOver-Petioration

Skip

skip

Table 1-23. Character Table

PAUSE Light Standard Table NLSP Table

OFF

Italic — US

Blinks

OFF

Blinks

OFF

Blinks

OFF

Blinks

OFF

Blinks

OFF

OFF OFF

ON ON

ON Blinks Blinks

OFF OFF OFF

ON ON

Blinks Blinks

OFF

Blinks

OFF

OFF OFF OFF

OFF

OFF OFF OFF

OFF

ON ON

Italic — France

Italic —

Germany

Italic — UK

Italic — Denmark 1

Italic — Sweden

Italic —

Italy

Italic — Spain 1

Pc 437 Pc 437

PC 850 PC 850

Italic — France

Italic

— Germany

Italic — UK

Italic — Sweden

Italic —

Italic — Spain 1

ON PC 860 PC 852

ON Pc 861 ON PC 863

PC 865 ON BRASCII ON ON

Blinks

Blinks Blinks Blinks Blinks

Abicomp

— —

— — — —

PC 853 Pc 855 PC 857 PC 866 PC 869

PC 437 Greek

ISO Latin IT

1s0 8859-7

Code MJK

Mazowia

Bulgaria

Italy

1-18

Rev.

LX-3(IO Service Manual

Table 1-24. Auto Line Feed

Product

Lkactiption

FONT Light 1

OFF

FONT Light

OFF

FONT Light 1

OFF

FONT Light 2

OFF

PAUSE Light

OFF

Table 1-25. Page Length

FONT Light 2

OFF

ON ON

OFF

PAUSE Light

OFF OFF OFF

Table 1-26. Auto Tear Off

FONT Light 2

OFF OFF

ON ON

PAUSE Light

Table 1-27. Tractor

Auto Line Feed

off On

Page Length

11 inches 12 inches

8.5 inches

70/6

inches

Auto Tear Off

off On

FONT Light 1

OFF OFF

ON ON ON

FONT Light 2 PAUSE Light

OFF

Table 1-28. Interface

FONT Light 1 FONT Light 2 PAUSE Light

OFF

ON ON

OFF OFF

Table 1-29. Bit Rate

FONT Light 1

ON ON

OFF OFF

FONT Light 2 PAUSE Light

OFF OFF

Tractor

Single

Double

Interface

Auto selection (10 me wait) Auto selection (30 rns wait)

Parallel

Serial

Bit Rate

300

600 bps

1200 bps

2400

bps

Rev. A

OFF

ON ON

OFF

ON ON

4800

tx)s

9600 bps

19200 bps

1-19

Product Description

U-300 Service Manual

Table 1-30. Parity Bit

FONT Light 1

ON ON ON

FONT Light 2

OFF

Table 1-31. Data Length

FONT Light 1 FONT Light 2

OFF

Table 1-32. ETX/ACK

FONT Light 1 FONT Light 2

OFF

PAUSE Light

OFF OFF OFF

PAUSE Light

OFF

PAUSE Light

OFF off

Parity Bit

None

Even

Data Length

bits

ETX/ACK

((’’”

1-20

~ .,....,

,. ..,,-,.

Rev. A

LX-3(IO

Sarvice

Manual

Ptvduct Daactiption

1.5 MAIN COMPONENTS

main components of the LX-300 is designed for easy removal and repair. The main

The

components are;

■

C130

MAIN BOARD: Control board

■

C130 PSB/PSE (120V

■

M-3G1O: Printer mechanism

Housing

1.5.1

C130

MAIN Board

The

C130

MAINboard consists

etc.

PROM (Program

2SC5060

(PF MOTOR Driver)

SLA7022M (CR MOTOR

DRIVER)

CG)

220-240V)

of an

n—

BOARD: Power supply board

E01A09

(CPU), a

000

/’

Program/CG

E01A09

(CPU)

00 000

000

ROM, a RAM, an EEPROM,

2SC5~

(Printhead Driver)

UPC78M05AHF

(Regulator

IC)

SUB

PCB

(COLOR OPTION)

Figure 1-9. C130 MAIN Board Component Layout

1.5.2

The diode bridge, etc. This board has two ratings for input AC voltages.

C130 PSB/PSE Board

C130 PSB/PSE

power supply board consists of a transformer, switching

Switching FET

Diodde Bridge

Transformer

❑

Regulater

“

)

FETs,

regulate

Power Switch

Fuse

IC,

Rev.

Figure 1-10. C130 PSB/PSE Board Component Layout

1-21

(

CHAPTER 2 Operating Principles

Table of Contents

2.1 PRINTER MECHANISM OPERATION

2.1.1 Printing Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.1.2 Carriage Movement Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.1.3 Paper Handling Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.1.3.1 Paper Feed Mechanisms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.1.3.2 Paper Advance Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.1.4 Ribbon Advance Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.1.5 Ribbon Shift Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2.1.6 Platen GapAdjustment Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

2.2 POWER SUPPLY OPERATION

2.2.1 Power SupplyOvefview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

2.2.2 Power Supply Circuit Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

2.3 CONTROL CIRCUIT

2.3.1 Control Circuit Operation Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

2.3.2 Power On Reset Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

2.3.3 Home Position Sensor Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

2.3.4 Paper End Sensor Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

2.3.5 Release Lever Position Sensor Circuit . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

2.3.6 Carriage

2.3.7 Paper Feed

2.3.8

2.3.9 Interface Circuit.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

2.3.10

Printhead Drive Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

EEPROM Control Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

2.3.11

2.3.12 Color Ribbon SensorCircuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

CSMotorAssembly

MotorDriveCircuit

Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

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

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

2-1

2-1o

2-12

List of Figures

Figure 2-1. Figure 2-2. Figure 2-3. Figure 2-4. Figure 2-5. Figure 2-6. Figure 2-7. Figure 2-8.

Figure 2-9. Figure 2-10 Figure 2-11 Figure 2-12 Figure 2-13

Figure 2-14

Srintheadoperation principles

i [

:arriage

Friction Advance Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

~ush

pu~Tractor paper Advance Mechanism . . . . . . . . . . . . . . . . . . . . . 2-5

Push-Pull Tractor PaperAdvance Mechanism . . . . . . . . . . . . . . . . . 2-6

Paper Path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .2-6

I I

Ribbon Advance Gear Linkage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

(

ColorShift Mechanism.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Movement Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Tractor paper Advance Mechanism . . . . . . . . . . . . . . . . . . . . 2-4

Platen GapAdjustment Mechanism . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Power Supply Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . 2-11

Control Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Power On Reset Circuit Diagram. .,..... . . . . . . . . . . . . . . . . . 2-13

HomePositionSensorCircuit Diagram . . . . . . . . . . . . . . . . . . . . 2-13

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

z-l

Figure 2-15. PaperEndSensor Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . 2-14

Figure 2-16 Figure 2-17 Figure 2-18 Figure 2-19 Figure 2-20

Release Lever Position Sensor Circuit Diagram . . . . . . . . . . . . . 2-14

Carriage Motor DriverCircuit Diagram . . . . . . . . . . . . . . . . . . . . . 2-15

Paper Feed Motor

DriverCircuit Diagram . . . . . . . . . . . . . . . . . . 2-16

Printhead Driver Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Parallel Interface Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Figure 2-21. Serial interface Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Figure 2-22 Figure 2-23 Figure 2-24

EEPROM Control Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . 2-18

CSMotorAssemblyCircuit Diagram . . . . . . . . . . . . . . . . . . . . . . 2-18

Color Ribbon SensorCircuit Diagram . . . . . . . . . . . . . . . . . . . . . 2-19

‘ K..d

List of Tables

Table 2-1. CR Motor Assembly Specifications. . Table 2-2. PF Motor Assembly Specifications . .

Table 2-3. Ribbon Advance Gear Linkage . . . .

Table 2-4. CS Motor Assembly Specifications. .

Table 2-5. Coloring Sequences . . . . . . . . . . . . .

Table 2-6. Power Supply Board. . . . . . . . . . . . .

Table 2-7. Power Supply Output Voltages and Applications . . . . . . . . . . . . . . 2-10

IC.

Table 2-8. Functions of the Main

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Table 2-9. Carriage Motor Drive Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

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

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

2-2 2-4 2-7 2-8 2-8

2-10

~ f=::,

. .

LX-3(XI Service Manual

2.1 PRINTER MECHANISM OPERATION

l%is

section describes the M-3G1O printer mechanism and explains how it works.

2.1.1 Printing Mechanism

Operating

Ptinciph3

The printer mechanism is composed of the is a 9-pin head for impact dot printing. Each wire has own drive coil, which causes the wire to move in and out of the driving wires work.

A drive signal transmitted from the control

1. the proper then causes the iron core to become magnetized.

2. The magnetic force draws the actuating plate toward the core, and the dot wire, which is

comected to the core, rushes toward the platen.

3. When the dot wire impacts the platen, pressing against the ribbon and paper, it prints a dot.

4. When the driving voltage stops energizing the coil, the magnetic force from the iron core vanishes. The actuating plate returns to its original position (the position

energized) with spring action. The dot wire also returns to its original position. This is the sequence used to print a single dot. The mechanism is equipped with a built-in thermistor for head temperature detection.

temperature detected by the thermistor is converted to an electric signal and fed back to the control circuit.

printhead

driving voltage, which energizes a corresponding coil. The energized coil

to print each dot. The four steps below describe how these

printhead,

arcuit

ink ribbon, and ribbon mask. The

to the

printhead

drive arcuit is converted to

betbre

printhead

coil was

The

Wire Resettin S rin

Stopper

Dot Wire

T’Y____

\Actuating Spring

Figure 2-1. Printhead Operation Principles

Rev.A

2-1

Operating Principles

LX-WI

Service

Mimual

2.1.2 Carriage Movement Mechanism

The

carriage

belt, driven pulley, HP sensor, etc.

assembly is

movement mechanism consists

The CR motor assembly drives

comected

to the timing belt, which is moved by the CR motor assembly. Figure 2-2

of the carriage assembly, CR motor assembly, timing

tie tifig belt. me

carriage

shows the carriage movement mechanism.

The

printer detects the carriage home position with the HP sensor. This sensor is the basis for

determining the carriage home position.

position.

The sensor is ON, when the carriage is pushed to the right or left.

The HP sensor informs the CPU of

the

carnage home

The

striker on the

carriage actives the sensor to indicate the carriage home position, which toggles the sensor to OFF.

Table 2-1. CR Motor Assembly Specifications

3.2 DISASSEMBLY AND ASSEMBLY

3.2.1 Removing the Printhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

3.2.2 Removing the

3.2.3 Removing the BOARD

3.2.4 Removing the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

3.2.5 Removing the BOARD ASSY.,INTERFACE . . . . . . . . . . . . . . . . . . . . . 3-17

3.2.6 Removing the ROLLER

3.2.7 Disassembling and Assembling the Optional Color Upgrade Kit. . . . . . 3-19

TOOk3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........0-.

forScrews. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

HOUSING

3.2.2.1 Removing the ROLLER ASSY.,EJECT. . . . . . . . . . . . . . . . . . . . 3-6

3.2.3.1 Removing the BOARD

3.2.3.2 Removing the BOARD

3.2.4.1 Removing the MOTOR ASSY.,PF . . . . . . . . . . . . . . . . . . . . . . 3-10

3.2.4.2 Removing the MOTOR

3.2.4.3 Removing the PLATEN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

3.2.4.4 Removing the DETECTOR,PE. . . . . . . . . . . . . . . . . . . . . . . . . 3-13

3.2.4.5 Removing the DETECTOR, HP. . . . . . . . . . . . . . . . . . . . . . . . . 3-14

3.2.4.6 Removing the Release

3.2.4.7 Removing the CARRIAGE ASSY.. . . . . . . . . . . . . . . . . . . . . . . 3-15

3.2.4.8 Removing the Ribbon Drive Gear Assembly. . . . . . . . . . . . . . . 3-16

3.2.4.9 Removing the PF Gear Assembly. . . . . . . . . . . . . . . . . . . . . . . 3-16

3.2.7.1 Removing the MOTOR

3.2.7.2 Removing the GEAR,

3.2.7.3 Removing the Color Ribbon Sensor . . . . . . . . . . . . . . . . . . . . . 3-19

ASSY.,UPPER

ASSY.,MAIN

ASSY.,MAIN.

ASSY.,PSB/PSE . . . . . . . . . . . . . . . . . . 3-8

ASSY.,CR . . . . . . . . . . . . . . . . . . . . . . 3-11

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

and PSB/PSE . . . . . . . . . . . . . . . . 3-7

. . . . . . . . . . . . . . . . . . . . . 3-8

Lever Position Sensor . . . . . . . . . . . . . 3-14

ASSY.,DRIVEN. . . . . . . . . . . . . . . . . . . . . . . . 3-18

ASSY.,CS . . . . . . . . . . . . . . . . . . . . . . 3-19

CAM,CS . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

3-1

3-1 3-1

3-4

3-6

List of Figures

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.

Procedure for Disassembling the Printer.

Removing the Printhead. . . . . . . . . . . . . .

Removing the HOUSING ASSY.,UPPER Removing the ROLLER ASSY.,EJECT. .

Removing the SHIELD PLATE. . . . . . . . .

Removin~ the BOARD ASSY.,MAIN and PSB/PSE . ...........3-8

Bendingthe LED Lead Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Removing the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Removing the MOTOR ASSY.,PF. . . . . . . . . . . . . . . . . . . . . .. ..3-10

Figure 3-10. Removing the MOTOR

ASSY.,CR. . . . . . . . . . . . . . . . . . . . . .. .3-11

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

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

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

3-4 3-5 3-6 3-6 3-7

Figure 3-11. Removing the PLATEN . . . . . . . . . . . . . . . . . . . . . . . . . . . .....3-12

Figure 3-12. Removing the

DETECTOR,PE . . . . . . . . . . . . . . . . . . . . . .....3-13

Figure 3-13. Wiring of the PE Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Figure 3-14. Removing the Figure 3-15 Figure 3-16 Figure 3-17 Figure 3-18 Figure 3-19 Figure 3-20

Removing the Release Lever Position Sensor. . . . . . . . . . . . . . . 3-14

Removing the CARRIAGE ASSY. . . . . . . . . . . . . . . . . . . . . .. ..3-15

Removing the Ribbon Drive Gear Assembly . . . . . . . . . . . . . . . . 3-16

Removing the BOARD ASSY.,INTERFACE . . . . . . . . . . . .....3-17

Removing the ROLLER

Disassembling the Optional Color Upgrade Kit . . . . . . . . . .....3-19

DETECTOR,HP . . . . . . . . . . . . . . . . . . . . . .....3-14

ASSY.,DRIVEN . . . . . . . . . . . . . . .....3-18

List of Tables

Table 3-1. Recommended Tools . . . . . . . . . . . . . . . . . . . . . ...............3-1

Table 3-2. Equipment Required for Maintenance. . . . . . . . . . . . . . . . . . . . . .. .3-1

Table 3-3. Inspection Checklist for Repaired Printer . . . . . . . . . . . . . . . . . . . . .

Table 3-4. Screw Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3-2

.7...

“

. . . .

L.XWO

Service Manual

3.1 OVERVIEW

Disasaambly

and

Asaambly

This section describes various points to note when

disassembkg

and assembling the printer.

3.1.1 Disassembly Precautions

Follow the precautions below when disassembling the printer.

Before

cablefiom

●

3.1.2

Tables 3-1 and 3-2 list the tools recommended for disassembling assembling or adjusting the

printer. Use only tools that meet these specifications.

disassemblin~ assemblin~

the

AC power socket.

maintain efficient printer operation:

Use

only the recommended tools for maintenance work. Use only the recommended lubricants and adhesives (see Chapter 6). Adjust the printer only in the manner

or adjusting the printer, disconnect the power supply

Failure to do can cause personal

desm”bed

in this manual.

injuy.

TOOiS

Note: All tools are

Table 3-2. Equipment Required for Maintel

Table 3-1. Recommended Tools

Tool Part No.

Round-nose pliers

Nippers

Tweezers

Soldering iron

I E-rhw holder#2.5

Phillips screwdriver No.2 Normal screwdriver

Thickness gauge

commemially

Multimeter

Oecillosoope

available.

Description

B7405OO1OO

I B740SO0400

Spaoif*ion

MHz

B740400100

B741OOO1OO

B7402OO1OO

B743800200

B743000100

—

mce

Note: An oscilloscope is required

Rev.A

om’y forsendcers

who repair to the

vponent

level.

3-1

Disassembly and Assembly

3.1.3 Service Checks After Repair

LXXX)

Service

Jl&mual

Before returning the printer after make servicing and shipping more

service,

effiaent.

Table 3-3. Inspection Checklist for Repaired Printer

Category

Printer units

Component

any wires broken?

Printhead

~amage

mwhanism❑ Mechanism oily

Paper

advance

mechanism

Are

any wires worn out?

Does the carriage move smoothly?

❑

Movement

Is the CR motor assembly at the correct temperature (not overheating)

Is paper advancing smooth~

❑

Movement

❑

Mechanism oily

the

Pper adVSTICe motor

at the correct temperature (not overheating)

Is the

type

feeding

use the checklist in Table 3-3, Whib

Item to

of paper in the printer

smoothl~

Check

noisyn

noiayu

Mechanism dirty

running

provides a record to

Is Check Required?

❑

Chsck@ ❑ Not

❑

Checkedn

Checked ❑ Not necessary

❑

Checkeda

Checked H Not necessary

❑

Checked ❑ Not

❑

Checked ❑ Not necessary

necessq

Not necessary

n=essa~

i,-.

Adjustmen

System upgrade

Paper path

Ribbon

mask Self-print

test

On-line test

Printhead

printing

Defautt

setting

ROM

version

Shipment

Is the tractor feeding the paper

~rr-lw

Is the paper path obstructions?

Is the platen free of damage?

the

ritin mask free

Was the Was the on-line test

Is the platen gap adjusted correctly?

the bidirectional print position

adjusted

Have user changeable settings been reset to the default value?

ROM version Has the ribbon been removed?

Have all relevant parts been included in the shipment?

self~rint

corractfy?

cfear

of all

of distortion?

successful?

suocess

fui9

❑

❑ ❑ ❑

❑ ❑

❑ ❑ ❑

❑ ❑

Checked ❑ Not necessary

Chackedn Not necessary

Chackad ❑ Not necessary

Checkedn

Checked D Not

Checked ❑ Not necessary

Checkedn

Checked ❑ Not necessary

Checkecf ❑ Not necessary Checked ❑ Not necessary

Chalked ❑ Not

Not necessary

neceasaty

Not necessary

necessa~

: ,..

3-2

Rev.A

LX-300 Service Manual

3.1.4 Specifications for Screws

Disassembly and Assembly

Table 3-4 lists the abbreviations used in the

washers.

Table 3-4. Screw Abbreviations

Abbreviation

CPB

CBB

CBS

CBC

CTB

CB(0)

CTBP

Cross-recessed pan head B-tight screw Cross-recessed bind head B-tight screw Cross-recessed bind head S-tight screw Cross-recessed bind head

Cross-recessd

Cross-recessed bind head with outside toothed lock washer Cross-recessed bind head tapping screw with fiat washer Cross-recessed countersunk screw

bind head tapping screw

following sections

Part Name

C-Lamitite

screw

for

small

parts, such as screws and

Rev.A

3-3

Disassembly and Assembly

LX-300 Service Manual

3.2 DISASSEMBLY AND ASSEMBLY

This

section

the printer. When the procedure for for removing the component, no description of the installation is given. Arty points of

concern follow the description of the procedure.

●

Before disassembling any part of the printer, note the warnings in Section 3.1.

●

Before disassembling any part of the printer, remove the paper and the ink

‘

Disassembly includes the following seven procedures:

Refer to the diagrams in the appendix to see how components fit together.

descnibes

the procedures for disassembling and assembling the main components of

installing

a component is

Removing the printhead Removing the HOUSING Removing the BOARD

ASSY.,UPPER

ASSY.,MAIN

and

PSB/PSE

Removing the Printer Mechanism

Removing the BOARD Disassembling the ROLLER

ASSY.,INTERFACE

ASSY.,DRIVEN

Disassembling the Optional Color Upgrade Kit

Simply tie reverse

n“bbon.

the

procedure

special

sTART

Unplug the power cable and the

interface cable from the printer!

{

Removing

the

Prlnthead

Section

Description

Removing the ROLLER

Page

ASSY., DRIVEN

3.2.2.1 Removing the HO USING ASSY.. U PPER Removing the ROLLER ASSY., EJECT

3.2.3

Removing the BOARD ASSY., MAIN and PSB I PSE

Fiiiz

Removing

the

3-6

I 3-7,8

3.2.4.1 Removing the MOTOR AS SY., PF

3.2.4.3

Removing the PLATEN

3.2.4.5

3.2.4.7 Removing the CARRIAGE

I3-10

3-12

ASSY. Removing the Ribbon Drive Gear

3.2.4.2 Removing the MOTOR

3.2.4.4

Removina the DETECTOR ASSY.. PE

Removina the Release Lever Position Sensor

3.2.4.8

13-11

3-13

ASSY., CR

Assy.

..:%

f’

‘

.. -..,-.

3.2.5

Remov8ng

3-4

3.2.4.9

Uemovina

the BOARD ASS Y.,

3-17

the P F Gear Assv.

INTE

3-16

RFACE

Figure 3-1. Procedure for Disassembling the Printer

Rev.A

LX-3W Sanka

Manual

3.2.1 Removing the Printhead

Disassamb&

and Assembly

Remove the COVER

ASSY.,

PLATEN KNOB, and optional color upgrade kit.

Remove the

3. Remove the

CPB

printhead.

ASSY.,PRINTER,

(M3 x 14) screw attaching the

4. Remove the flexible flat cable

(lWC)

EDGE GUIDE

from the

printhead.

ASSY.,

ribbon cartridge, TRACTOR

Rev.A

Figure 3-2. Removing the Printhead

3-5

Disassembly and Assembly

3.2.2 Removing the HOUSING ASSY.,UPPER

Remove the COVER

ASSY.,

PLATEN KNOB, and optional color upgrade kit.

2. Remove

the

CPB

(M4 x 14) screws attaching the HOUSING

HOUSING,LOWER.

3. Liftoff the HOUSING

ASSY.,pM~R, EDGE GUIDE AssY., ribbon

ASSY.,UPPER.

CPB(M4X14)

~’~

LX-300 Service Manual

c=tidge,

ASSY.,UPPER

TRACI’OR

to the

HOUSING ASSY

ING,LOWER

Figure 3-3. Removing the HOUSING ASSY.,UPPER

3.2.2.1 Removing the ROLLER

Remove the HOUSING

ASSY.,UPPER.

ASSY.,EJECT

( see Section 3.2.2.1).

2. Lift the ROLLER ASSY.,EJE~up and atananglefrom the HOUSING

Note:

When removing the ROLLER

ASSY.,EJECT,

the

SPRING,5U0

may pop out.

., UPPER

ASSY.,UPPER.

Figure 3-4. Removing the ROLLER ASSY.,EJECT

ASSY.,UPPER

ASSY.,EJECT

,,.-4. %

f ,,,

.., . . . .

3-6

Rev.A

LX-31M

Service Manual

3.2.3 Removing the BOARD ASSY.,MAIN and PSB/PSE

DisassembiyandAssembly

Remove the COVER

(

CBB(

ASSY.,

PLATEN KNOB, and optional color upgrade kit.

2. Remove the HOUSING

3. Discomect the 3 flexible flat cables and

PSB/PSE.

4. Remove the 4

PSB/PSE,

attaching the ground wire of the POWER CABLE.

5. Disengage the SHIELD PLATE and

GROUNDING PLATE.

CBB (M3

the

CBB (M3

ASSY.,PRINTER,

ASSY.,UPPER

x 8) screws attaching the shield plate to the main board assembly and

x 8) screw attaching the CS BOARD and the

EDGE GUIDE

(see Section 3.2.2).

(FFCS)

and 6 connectors from the BOARD

BOARD ASSY.,MAIN

ASSY.,

ribbon cartridge, TIUU30R

and

ASSY.,MAIN

CBC (M4

PSB/PSE

x 8) screw

from the

GROUNDING PLATE

Figure 3-5. Removing the SHIELD PLATE

Rev.A

3-7

Disassembly and Assembly

LX&Xl

Service M%ual

3.2.3.1

Removing the BOARD

Remove the

FFC

of the BOARD

ASSY.,MAIN

ASSY.,MAIN.

2. Remove the

3. Remove the BOARD

3.2.3.2 Removing the BOARD

Remove the

CBC (M3

FFC

for the BOARD

x8) screw and the3 CB USCAC

ASSY.,MAIN.

ASSY.,PSBIPSE

ASSY.,MAIN.

2. Remove the CB

3. Remove the BOARD

●

When replacing the BOARD

BOARD

USCA C(M3

ASSY.J4AIN

10) screw and 2 CB

ASSY.,PSB/PSE.

ASSY.,MA.IM

(see Figure 3-7).

. The SHIELD PLATE is easily bent; be

the BOARD ASS

CB USCA

Y.,MAIN

C(M3X1O)

and

PSBIPSE.

USCA C(M3X8)

ASSY.,PSB/I’SE

bend the LED lead wires parallel to the

carefil

when tightening the screws that attach it to

CB USCA C(M3X8)

from

(M3

from

USCA C(M3

,CBC(M3X8)

comector CN2

x 8)

comector CN2

x 8) ssrews.

of the BOARD

on the BOARD

fl::y

‘=.

----

tiOO\MdXU)

BOARD

ASSY.,MAIN

‘v

Figure 3-6. Removing the BOARD ASSY.,MAIN and PSB/PSE

BOARD ASSY.,MAIN

3-8

Figure 3-7. Bending the LED Lead Wires

Rev.A

LX-

Service Manual

3.2.4 Removing the Printer Mechanism

Remove the COVER

AS5Y.,

PLATEN KNOB, and optioml

2. Remove the HOUSING

3. Remove the connectors and

4. Remove the3

5. Remove the three described in the previous step.

6 Remove the printer mechanism.

SHAFT,HOUSING,LOWER

ASSY.,PRINTER,

color

ASSY.,UPPER

FFCS

(see Section 3.2.2).

from the BOARD

EDGE GUIDE

upgrade kit.

(1018296).

(1015457). Note that this

ASSY.,

ribbon cartridge,

ASSY.,MAIN.

DisassembiyandAssamblY

TRACT’OR

shaft is different from the

SHAIT,HOUSING,

LOWER (1015457)

‘zq

f’h

ff~-J-w

LOWER(1018296)

Printer Mechanism

Rev.A

Figure 3-8. Removing the Printer Mechanism

3-9

Disassembly and Assembly

3.2.4.1 Removing the MOTOR ASSY.,PF

Remove the printer mechanism (see Section 3.2.4).

1. Remove the GROUNDING

3. Remove the CBB (M3 x

Release the clip holding the MOTOR

5. Remove the MOTOR

ASSY.,PF

SPRING,PLATEN

8) screw

attaching the MOTOR

from the

ASSY.,PF

FRAME,RIGHT.

LX-3.X)

Service Manual

that secures the platen shaft. (see Section 3.2.43)

from the

ASSY.,PF

FRAME,RIGHT.

to the

FRAME,LIGHT.

‘.:-

FRAME, RIGHT

TR~NSMISSloN

GEAR

\uJy~

MOTOR,

Figure 3-9. Removing the MOTOR ASSY.,PF

CBB(M3X8)

ASSY.,PF

3-1o

Rev.A

LX-31M

Service Manual

Disasaambly

and

Assambly

(

3.2.4.2 Removing the MOTOR

Remove the Printer Mechanism (see Section 3.2.4).

2. Remove the BELT TENSION SPRING from the hook on the

ASSY.,CR

MOTOR ASSY.,CR

and the hook

on the FRAME, BASE.

3. Remove the TIMING BELT from the PULLEY DRIVE.

4. Remove the E-ring, PULLEY WASHER, BELT PULLEY FLANGE, and PULLEY DRIVE MOTOR

the

5. Rotate the MOTOR

ASSY.,CR.

TIMIN~

ASSY.,CR

BELT

counterclockwise and remove it.

from

.E-ring

PULLEY WASHER

BELT PULLEY FLANGE

BELT TENSION SPRING

MOTOR

FRAME, RIGHT

ASSY.,CR

Figure 3-10. Removing the MOTOR ASSY.,CR

Rev.A

3-11

Disassembly and Assembly

LX-WI Service Manual

3.2.4.3 Removing the PUiTEN

Remove the printer mechanism (see Section 3.2.4).

1. Remove the GROUNDING

3. Remove the GEAR,25 from the

SPRING,PLATEN

that secures the platen shaft.

FRAME,RIGHT.

4. Disengage the teeth of the 2 BUSHING 11s and rotate them.

5. Rotate the PLATEN and remove it.

BuSHING,l 1

PLATEN

GROUNDING SPRING,

x :,

.fl \

“x

. . . .

Figure 3-11. Removing the

PWTEN

3-12

Rev.A

LX-300 Service Manual

Disassembly and

Assambly

3.2.4.4 Removing the

Remove the printer

DETECTOR,PE

mechanism (see Section

2. Remove the PLATEN (see Section 3.2.4.3).

3. Release the

FRAME,RIGHT

Remove the PAPER

SHAFT

and LEFT.

FRICTION of the PAPER

GUIDE,UPPER

from the

3.2.4).

GUIDE,UPPER

FRAME,RIGHT

from the clips on the

and LEIT.

Figure 3-12. Removing the DETECTOR,PE

5. Release the 2 clips securing the

Figure 3-13. Wiring of the PE Sensor

DETECTOR,PE

DETECTOR,

PAPER GUI DE, UPPER

and remove it.

ire

DETECTOR,PE

GHT

Rev.A

3-13

Disassembly and Assembly

LX-3(IQ Service Manual

3.2.4.5 Removing the

Remove the printer mechanism (see Section 3.2.4).

2. Release the 2 clips attaching the through 2 holes in the

DETECTOR,HP

DETECTOR,HI’

FRAME,BASE;

to release the clips, push each with a pair of tweezers.

and remove it. The clips can be accessed

Figure 3-14. Removing the DETECTOR,HP

3.2.4.6 Removing the Release Lever Position Sensor

1. Remove the MOTOR ASSY.lF(See

2. Release the 2 clips that attach the release lever position sensor to the frame of the MOTOR

ASSY.,PF.

3. Remove the release lever position sensor from the frame of the MOTOR

Wion3.2.4.1).

Frame of the MOTOR

ASSY.,PF

Release Lever

position

Sensor

ASSY.,PF.

Clip

., . ... .

: ..,, ,

“’”’

3-14

Figure 3-15. Removing the Release Lever Position Sensor

Rev.A

LX300

Service Manual

Disassembly and Assembly

3.2.4.7

3. Release the hook that attaches the

4. Remove the printhead

5. Remove the GROUNDING

6. Rotate both sides of the

7. Remove the SHAFT

Removing the CARRIAGE

Remove the printer mechanism (see Section 3.2.4). Remove

3.2.4.2), and remove the TIMING BELT of the CARRIAGE

to the left and remove it.

and RIGHT.

the

BELT TENSION SPRING from the hook

FFC

from the

PLATESH~,CR

BUSH,PARALLEL

ASSY.,CR

ASSY.

SHEET,CABLE,HEAD

FRAME,BASE.

from the left side of the printer mechanism.

ADJUST and remove them from the

GUIDE and the CARRIAGE

LEVER,G,ADJUST

$(=

on the

MOTOR ASSY.,CR

ASSY.

from the PULLEY DRIVE.

to the

FRAME,BASE.

ASSY.

(see Section

Slide the cable

FRAME,LEFT

GROUNDING

PLATE,SHAH,CR

BUSH, PARALLEL ADJUST

SHE~,CABLE,HEAD

FRAME,BASE

CABLE HEAD

\’-Ql

Figure 3-16. Removing the CARRIAGE

ASSY.

RALLEL

FRAME, RIGHT

ADJUST

Rev.A

3-15

Disassembly and Assembly

3.2.4.8 Removing the Ribbon Drive Gear Assembly

Remove the printer mechanism (see Section 3.2.4).

2. Release the3 hooks attaching the

3. Remove the Remove the BELT TENSION SPRING between

4. hook

5. Remove the TIMING BELT from the

cov&&~g;,:,H,,ANGE

COVER,RD.

the

FRAME,BASE

(see Section 3.2.4.2).

RATCHET,RD

COVER,RD

PLJLLEY

to the

DRIVEN.

FRAME,LEFI’.

the

hook on tie

LX-3tM

MOTOR

Service

ASSY.,CR

Mhnual

and the

A!.,+,

i ,.

R18BON

PLANE WASHER

SPRING WAStiER

P~N=AR’f

GEAR

GEAR,5.1 ,16.2

SHAH

GEAR,14.4

FRAME,BA=

‘?

, ,

ji.wLs~~~~~~~E~R’”’”

GEAR,13.2

,16.2

, -. ,.

Figure 3-17. Removing the Ribbon Drive Gear Assembly

Make sure not to put the

3.2.4.9

3-16

Removing the PF Gear Assembly

Remove the MOTOR

Remove the PF gear train and the release lever.

ZZMING

ASSY.,PF

BELT between the COVERJU3 and the FRAME,LEFT.

(see Section

3.2.4.1).

Rev.A

LX-300

Samica

Manual

3.2.5 Removing the BOARD ASSY.,INTERFACE

Remove the printer mechanism (see Section 3.2.4).

2. Remove the GROUNDING PLATE connecting the SHIELD SHIELD PLATE.

3. Remove the

to the

4. Remove

CBB

(M3

x8) screw

HOUSING,LOWER.

the

CBB (h43

x 8) screws attaching the BOARD

and the

CBT(M3

x 10) screw attaching the

HOUSING,LOWER.

5. Remove the

COVER,BOTTOMand

the BOARD

ASSY.,INTERFACE.

PLATE,I

ASSY.,1

DiaassemblyandAssembly

NIERFACE

and the

COVER,BO’IIOM

NTERFACE to the

BOARD ASSY.,INTERFACE

GROUNDING PLATE

HOUSING, LOWER

Figure 3-18. Removing the BOARD ASSY.,INTERFACE

IWATE,,NTERFACE

Rev.A

3-17

Disassembly and Assembly

3.2.6 Removing the ROLLER ASSY.,DRIVEN

Remove the

2. Remove the CF (M2.6 x 8) screw attaching the ROLLER

3. Remove the ROLLER

ROLLER, DRIVEN

COVER,PRINTER.

ASSY.,DRIVEN.

CF(M2.6X8)

LXi300

ASSY.,DRTVEN.

Service

M5nual

SPRING,73

W~DE;R,ROLLER,

COVER, ROLLER, DRIVEN

Figure 3-19. Removing the ROLLER ASSY.,DRIVEN

7°

COVER, PRINTER

!’

“’ i

“T.e

,’

“

3-18

Rev.A

LX-WI

3.2.7 Disassembling and Assembling the Optional Color Upgrade Kit

Service Manual

Dkassembly

and Assembly

3.2.7.1 Removing the MOTOR

1. Remove the CBB (M3 x 8) screw attaching the

2. Release the 2 clips attached to the

3. Remove the MOTOR

3.2.7.2 Remove the

Remove the MOTOR

2. Remove the

3. Remove the

E-ring3

GEAR,CAM,CS.

ASSY.,CSwith

GEAR,CAM,CS

ASSY.,CS

from thecolorcam shaft.

ASSY.,CS

MO~R ASSY.,CS

COVER,CS.

the BOARD

(see Section 3.2.7.1).

ASSY.,CS

to the

from the

3.2.7.3 Removing the Color Ribbon Sensor

Remove the MOTOR

2. Remove the E-ring4 from the cartridge holder shaft.

3. Remove the

4. Release the clip that attaches the HOLER,CARTRIDGE,COLOR to the

5. Remove the

COVER,CS

HOLDER,CARTRIDGE,COLOR

color

ASSY.,=and

ribbon sensor comector from the BOARD

the BOARD

BOARD

ASSY..CS

ASSY.,CS(see Section3.2.7.1).

from the

M~R ASSY.,CS.

ASSY.,CS.

COVER,CS.

color

ribbon sensor.

f?ev.A

HOLDER,CARTRIDGE,

COLOR

Figure 3-20. Disassembling the Optional Color Upgrade Kit

3-19

CHAPTER 4 Adjustments

Table of Contents

4.1 ADJUSTING THE PRINTER MECHANISM

4.1.1 Platen Gap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2 DEFAULTS, MACHINE INFORMATION BIDIRECTIONAL ADJUSTMENT

4.2.1 Default Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4.2.2 Bidirectional Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

S~lNGS,

AND

List of Figures

Figure 4-1. The Flowchart of the Platen Gap Adjustment . . . . . . . . . . . . . . . . . 4-1

Figure 4-2. The Bidirectional Pattern Print. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4-1

4-2

LX-3U0

Service Manual

Adjuatmenta

4.1 ADJUSTING THE PRINTER MECHANISM

This section describes the adjustments you may need to make to the printer mechanism.

4.1.1 Platen Gap Adjustment

If you have rotated or reassembled the CR guide shaft assembly or the parallelism adjustment

bushina or if printing is abnormal, you must adjust the platen and the

Set the release lever to the friction position.

Remove the upper housing assembly (see Section 3.2.1).

Set the gap adjustment lever to O.

Remove the Remove the ribbon mask with a pair of tweezers.

Install the

Adjust the platen gap using the flowchart below. The correct platen gap is 0.455 mm

0.015 mm. When measuring the gap, take care to let the gauge fall between the platen and the

printhead

toward the platen using a screwdriver. To reduce the platen gap, turn the parallelism adjustment bushing away from the platen.

printhead.

by gravity only. To increase the platen gap, turn the parallelism adjustment bushing

printhead.

Adjust the Platen

Figure 4-1. The Flowchart of the Platen Gap Adjustment

Rev.A

4-1

Adjustments

LX-300 Service

Mimuai

4.2 DEFAULTS, MACHINE INFORMATION

SEITINGS,

AND

BIDIRECTIONAL ADJUSTMENT

4.2.1 Defaults and Machine Information Settings

Perform the

procedure below when the main board assembly is replaced.

Comect

the

printer to a PC.

Turn the printer on.

Load paper into the printer by pressing the

LF/FF

button. You can use either

cutsheet

continuous paper.

Load the

GWBASIC

program onto the PC. Insert a diskette containing the LX-300 Adjustment Program into the PC’s diskette drive. Load the LX-300 Adjustment Program named

“LX300.”

When you run the program, the following message appears on the display:

LX-300 Adjustment Program

1. Bi-D Adjustment

2. Defaults& Machine Information Settings

3. END If ready, press 1-3 and the Enter key. –

(

“$ ‘“

8. Press 2, then Enter to select

9. The

following message appears on the display:

D#aults

&Machine

In@matwn

Which destination do you want to select?

EAI

: 1 EDG : 2EIS :3 EFS : 4

ESP

: 6

ESP

: 7 EUL : 8 EIB :9

ETT

: B

EHK :5

EAL

: A

Press 1- B and the Enter key.

10. The following message appears on the display:

LX-300

Default & Machine Information Data

Registration Program

If you press the Y key, all data stored in the EEPROM on the main board will be initialized to the factory default settings.

Before

proceedin&

confirm the following

1. The printer is

comected

to the computer correctly.

2. The printer is on.

3. Paper is loaded in the printer. If ready, press Y and the Enter key. –

Settings.

““,.

.-.

.., .,

4-2

F?ev.A

LX41M Sarvka

11. Press Y, then Enter. The default setting table appears on the display:

Manual

Adjustments

No.

Message language Tractor control

Character table

Page length

1 inch skip over perforation

Intetface

6 7

Bit rate

Prii bit Date Length

9 10 11 12 13

I%ese

ETWACK

Auto tear off Character spacing Auto line feed

Shape of zero

are the factory defaults programmed into this printer.

Add Function

selection

protocol

SW& Valid

English

Single

PC-437

11 inch

OFF OFF

9600 bps

NONE

DISABLE

OFF

10 cpi

Not slashed

7 bit

OFF

12.

Press Y, then Enter to confirm these settings and return to the initial menu.

13. Exit the program by pressing3, then Enter.

14. The following message appears on the display:

Any setting value specified within this program

is not stored in the

15. Turn the printer off to store the defaults shown above into the assembly.

Note:

If you have replaced the adjustment procedure after completing

EEPROM

Turn the printer OFF now.

until you turn the printer OFF.

m“n

board assembly, you must

this

procedure.

EEPROM

also

perform the bidirectional

on the main board

Rev.A

Adjustments

4.2.2 Bidirectional Adjustment

This

section describes the adjustment

or when parts are assembly has been replaced.

reinstalled or replaced. T’his pr~ure is also n=es=q

prmedure n=ssary

when

the LX-3W

LX&M Service

printer is

reassembled

the

main board

Mhnua/

Notes:. When

●

. Do .

Comect the printer to a PC.

2. Turn the printer on.

3. Load paper into the printer by pressing the

4. Load the

5. Insert a diskette containing the LX-300 Adjustment Program into the PC’s diskette drive.

6. Load the LX-300 Adjustment Program.

7. When you run the program, the following message appears on the display:

the

main

board is replaced, perform the Defaults&

procedure first, then petiorm the

Theprintercovermustbe

notperfonn the

T4e

optional color upgrade

GWBASIC

Bi-D

2. Defaults& Machine

3. END If ready, press 1-3 and the Enter key. -

program onto the PC.

LX-3(MI Adjustment Program

Adjustment

installed when youperfonn the

Bi-D

Adjustment

kitmustbe

Mxmation

Bi-D

procedure if the

LWFF

Settings

Machine Information

Adjustment

removed when youperfonn the

button.

prucedure.

Bi-Dadjustment.

input

voltage is fluctuating heavily.

Settings

Bi-D a~”ustment.

(...

if’ll:iill

im’il ih:lh

illl:h

Figure 4-2. The Bidirectional Pattern Print

El El H II II

II H II H II

El El H El H H El

El It

II II H

1! 1!

H H II

El H H II

El El

El II El II

Rev.A

LX&M Service Manual

Adjustments

Type 1 to select

Bi-D

Adjustment

then press Enter. After 10 line feeds, the printer prints 5 rows of H characters in both draft and LQ modes. When the printer begins bidirectional printin& the message

After printing is complete, the following message appears on the display:

Bi-D

“Bi-D

TEST PRINTING” appears on the display.

INPUT

Draft: -

From the 5 rows of draft patterns, find the row in which the vertical lines

in the

H are best

aligned, then enter the value assigned to that row. The following figure is an example of the

Bi-D

printout.

After you enter the value for draft, the following message appears on the display:

10.

LQ : -

From the 5 rows of LQ patterns, find the row in which the vertical lines in the

H are best

aligned, then enter the value assigned to that row. The printer lets you check your print pattern selection for confirmation following steps 9 and

11. 10 by printing one row of the pattern you selected.

After the printer prints check patterns for confirmation, the

12.

followin

g message appears on the

display:

Bi-D

is correct, press “Y’ and the Enter key, and

Bi-D

is incorrect, press “N” and Enter. –

13.

If your printed pattern is aligned vertically, press Y and Enter to complete the

Bi-D

adjustment. Otherwise, press N to return to step 9 to specify another adjustment value.

Rev.A

4-5

Chapter 5 Troubleshooting

Table of Contents

5.1 OVERVIEW

5.2 UNIT LEVEL TROUBLESHOOTING

5.3 REPAIRING THE MAIN BOARD ASSEMBLY

5.4 REPAIRING THE PRINTER MECHANISM

List of Figures

Figure 5-1. Troubleshooting Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Figure 5-2.

Figure 5-3. Flowchart Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Printhead Connector Pin Alignment . . . . . . . . . . . . . . . . . . . . . . . . 5-2

List of Tables

Table 5-1. Printhead Coil Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Table 5-2.

Table 5-3. Motor Driver Test Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Table 5-4. Motor Coil Resistance Test Points. . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Table 5-6. Sensor Test Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Table 5-6. Error State Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Table 5-7. Symptoms and Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Table 5-8. Repairing Problems in the Main Board Assembly. . . . . . . . . . . . . . 5-11

Table 5-9. Repairing the Printer Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . 5-13

Printhead Driver Test Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5-1

5-4

5-11

5-13

LX+Otl

Service Manual

5.1 OVERVIEW

Follow the procedure in the flowchart below to identify printer problems.

Tmubkahooting

( The Fault is corrected )

Figure 5-1. Troubleshooting

Note: If the power supply board assembly is

repair should be performed on it, except for the replacement of fuse F1.

The

following tables provide troubleshooting information.

Part

Printhead

Table 5-1.

Coil resistance 33.3 Q * 3.3 Q at 25° C (77°

Printhead

fautty,

Coii Resistance

Specification

it must be replaced as a whole unit. No

field

Rev.A

5-1

Troubleshooting

LX-300 Service Manual

Head Pin No.

68492 CC

View A

C351

Printhead

C : COMMON

H ..,,,

-. ..

l!’

Transistor

Numbers

,Q2,Q3,Q4

Q5,Q6,Q7,Q8,

I Q9

Transistor

Numbers

PF Motor Driver

(Q11,Q12,Q13, Q14)

Figure 5-2. Printhead Connector Pin Alignment

Table 5-2.

(Set Meter to Diodes. Check with Power Off.)

Check from base to collector. Check from base to emitter.

Reverse leads and test again.

Table 5-3. Motor Driver Test Points

(Set Meter to Diodes. Check with Power Off.)

Check from base to collector and from base to emitter.

Reverse leads and test again. (Emitter and base are marked on the main board

assemblv.)

Printhead Driver Test Points

Test Method

Not open and not shorted

from base to collector, base

to emitter.

Meter Reading

Neither open nor shorted from base to collector or base to emitter.

5-2

Rev.A

LX-300 Service Manual

Table 5-4. Motor Coil Resistance Test Points

Ttvubleshooting

Motor

>onnector

Number

CR Motor Assembly

(CN2)

PF Motor

Assembly

(CN3)

Motor Assembly

(CS

Board

Assembly)

sensor

Connector

Number

HP sensor

Common

Number

3,4

(CN7)

Test Method

Test Pin

Number

1,2,5,6

256

,)!

(Set Meter to Ohms. Disconnect

Motor from Main

with Printer Power Off.)

Place one lead on pin 3 or 4 and the other lead on each of the 4 test pins to check the two motor phases.

Place one lead on pin 4 and the other

lead on each of the two test pins to check the two motor

Place one lead on pin 5 (brown) and the other lead on each of the 4 teat pins to check the 4 motor phases. (Pin 3 is a

common pin.)

Board

~hases.

and Check it

Table 5-5. Sensor Test Points

Test Method

Set Meter to Ohms. Check Printer with

Power Off.)

Place one lead on pin 1 and the other

lead on pin 2. Toggle the sensor position,

Meter should toggle between open and short. (Closed

Meter Reading

18!2 ~

7% (at

25°

c, 77°

56Q *

5% (at

25° C, 77°

150$2 t

25° C, 77°

Method Reading

5% (at

active.

Place one lead on pin 1 and the other

PE sensor

Release Lever Position Sensor

(CN3)

Color Ribbon Sensor Assembly)

Error Indication

The printer beeps and the PAUSE light blinks

The printer beeps and the PAUSE light stays on

(CS

(CN6)

Board

lead on pin 2. Toggle the sensor by inserting and removing a sheet of paper.

Place one lead on pin 1 and the other lead on pin 2. Change the paper-release lever position.

Place one lead on pin 1 and the other lead on pin 2. Toggle sensor position.

(...)

(---

Table 5-6. Error State Indication

Error Status

Paper-out error.

)

Operating error.

Fatal

enor.

Paper is not installed

. The release Iever is set to the TRACTOR

position before the cut sheet is ejected.

. The release lever is set to the FRICTION

position before the continuous papa

Power supply

Meter should toggle between

open and short. (Open

Meter should toggle between open and short. (Open continuous paper.)

Meter should toggle between open and short. (Open

Cause

vottage

is abnormal.

active.)

r is ejected.

votes:

Rev.A

(*)

Theprinterbeeps

(–) The

pnnterbeeps

for

l/10ofa

for 1/2 of a second with a

second

WI”th

l/10-secondpause.

Troubleshooting

5.2 UNIT LEVEL TROUBLESHOOTING

YOU may be able to identify the defective unit just from provides the symptoms for a number of failures, so

the

m-oblem

bel;w

has been identified, refer to the flowchart listed in

to determine the cause of the problem.

Table 5-7. Symptoms and Problems

that

LX-300

the

symptom displayed. The table below

YOU

easily identify

the

right-hand

Swvfce Manual

the

problem. Once

cAmn

of the table

-~--:, E ;,’

Symptom

Printer fails to operate when the power is on.

Abnormal carnage operation.

Printing is faulty during self-test, but carriage operation is

normal.

Abnormal paper feed.● The printer prints but paper feeds incorrectly.

Abnormal control

panel operation.

Data sent by the host

computer is printed

incorrectly.

I%e

repair procedure flowcharts use the following symbols:

. Carriage does not move. . Control panel indicator LEDs do not light.

●

Caniage

●

The carriage returns to home position correctly, but the

printer then fails to enter the READY mode.

●

No printing at all.

●

Faulty printing — some of the dot are not printing.

●

When the

●

Carriage operates normally at power up, and self-test

●

Data from the computer is printed incorrectly.

moves away from home position at power on.

LF/FF

button is pressed, no paper is fed.

is executed correctly, but data

Problem

not printed.

See Page

5-5

5-6

5-7

5-8 5-9

5-1o

$.,,,”

@Em

Start

Processing

Forwarding to

another item

0+ T7

Decision

Figure 5-3. Flowchart Symbols

Branching

Return to the Start

of the item

END

---

‘

5-4

Rev.A

LX-300 Service Manual

Printer fails to operate when the power is on.

Tfvubleshooting

120V version is 103.5 -132V

230V

version is 198-

284V

TYES

PSWPSE

blow?

Measure the VP(+35VDC) at pin 1 and

2 of CN2 on BOARD

ASSY.,PSWPSE.

Use correct

No fluctuation from AC

voltage range is permitted.

AC input voltage.

Replace the BOARD

ASSY.,MAIN.

Verify each

in Table 54.

motot’s

Replace the BOARD

ASSY.,MAIN.

coil resistance

Replace necessary unit.

END

Rev.A

s-s

Troubleshooting

Abnormal carriage operation.

CEp

LX-WI

Service Mhnual

Are connectors

connecting the BOARD

and the

Prinler

CN2

Mechanism?

YES

CN8

ASSY,

MAIN

Reinsert connectors

correclly.

See the troubleshooting item for the PRINTER

➤

MECHANISM .(

Section5.4)

ault

corrected?

5-6

Rev.A

LX-3(M

Service Manual

Tmubleshootina

3. Printing is faulty during self-test, but carriage operation is

Uss

AC input voltage normal?

120V version is 103.5 -132V

230V version is 198- 264V

Hold down the and turn on the printer to

start

printing the self-test.

LF/FF

button

correctAC

fluotuatkn

range is permitted.

the

ASSY.,

input voltage.

from AC

oonnactors CN2-

MAIN and the Printer

voftage

normal.

Reinaertfhem

Verify FFCS are properly

inserted and have continuity If they are OK, replace the

Printhead.

YES

Adjust the

PLATEN gap.

Replace the BOARD

ASSY.,MAIN.

Rev.A

5-7

Troubleshooting

Abnormal paper feed.

START

Reinsert the connector

➤

CN6 correctly.

Load the pape correctly.

‘T

LXMO

Service Manual

YES

Replace the BOARD

ASSY.,MAIN.

YES

See

the troubleshooting items for the Printer Mechanism.

(Sect.5.4)

fault corrected?

See the troubleshooting items for

MEcHANlsM.(sect.5.4)

the PRINTER

YES

Replace the BOARD

ASSY.,MAIN.

. .

. . . .

S-8

Rev.A

LX-300 Service Manual

5. Abnormal control panel operation.

Tmublaatmoting

Replace the switches on the BOARD

ASSY.,MAIN.

fault corrected?

YES

Replace the BOARD

ASSY.,MAIN.

YES

Refer to the other

troubleshooting items.

9’

Rev:A

5-9

Troubleshooting

Data sent by the host compute?’ is printed incorrectly.

START

Print the self-test.

Refer to the other troubleshooting items.

Check the default setting.

LX-300 Service Manual

. . .

‘..... -

YES

Replace the BOARD

ASSY.,MAIN.

YES

Replace the interface cable

‘

from the host

fault

Increase the the setting position

of the paper-thickness lever.

conmputer.

corrected?

5-10

Rev.A

LX-3(XI

Service

Manual

5.3 REPAIRING THE MAIN BOARD ASSEMBLY

Thwbleahooting

This section provides instructions for repairing a defective main

various symptoms, likely causes, and

resistance values, and other values to be checked when evaluating the operation of any potentially faulty component. Check these values and take the appropriate action.

Note:

This section is required only for

t%eckp-oints.

serw”cers

Checkpoints refer to

who repair to the component level.

board assembly. It describes

pro~r

waveforms,

Table 5-8. Repairing Problems in the Main Board Assembly

Rev.A

$11

Troubleshooting

LX-300 Service

Table 5-8. Repair of Problem in the main board assembly (Continued)

Mimual

5-12

Rev.A

LX-300 Service Manual

5.4 REPAIRING THE PRINTER MECHANISM

Tivu6/eahoot/ng

For detailed procedures for replacing or adjusting parts, refer to Chapter 3,

Assembly,

repair, refer to Table 5-10 to try find other potential causes.

and

Chapter 4,

Adjustments.

If a problem or symptom recurs following an attempted

Table 5-9. Repairing the Printer Mechanism

Problem

The CR motor assembly fails to operate the 10 operate.

The carriage move. does not operate when turned on (after the carriage has been manually centered prior to power on.)

Symptom

The CR motor assembly fails

iiming

belt

after power on.

The CR motor assembly rotates, but

the carriage

does not

The carriage moves to the left slightly,

then stops. Replace the

Cause

Foreign substances are lodged in

the gears or to see if the motor can rotate

elsewhere in the mechanism”

me CR ~tor

assembly is defective.

The belt

pulleys are

defective.

The timing

belt is

defective.

The carriage

movement is not smooth. manually.

Manually move the timing belt

freely.

Measure the motor coil resistance. It should be about 18 ohms. If the motor

shorted, also check the CR

motor assembly drivers on the main

Check for broken or worn pulleys.

Check that the timing belt is Reinsert the inserted bottom of the carriage.

Check for a broken timing belt.

Check whether the moves smoothly when moved

Check Point

board.

comctly

into the

caniage

Disassembly and

Solution

Remove the foreign substances.

Replace the

CR motor

assembly(and

drivers, if

necessary).

Replace the belt pulleys.

timing

belt. Replace the

timing

belt. Clean and

lubricate the

CR guide shaft assembly.

CR motor

assembly.

The carriage

moves to the

left or right end, then defective. stops.

Self-test printing is not executed. does not print.

Rev.A

The carriage moves, but

The HP sensor is

The

printhead

FFC

common wires are disconnected.

~:a::nth=d

Use a

multimeter

HP sensor.

Check the common wires for

the

printhead FFC.

Measure the

resistance. It should be approximately 33.3 ohms. If the

printhead

check the drivers.

to check the

printhead

is shorted, also

coil

Replace the HP sensor.

Replace the

FFC.

Replace the

printhead

drivers, if

necessary).

(and

513

Troubleshooting

Table 5-9. Repairing the Printer Mechanism (Continued)

LX-300 Service Manual

Problem

Self-test

]rinting

~bnormal.

Paper feed is abnormal.

Symptom

A particular dot is missing.

The printing is

too light, or

the print density is not uniform.

Printing is per

formed but the assembly is

~per is not

fed or is not

fed uniformly.

Cause

The

printhead

is defective.

The

printhead

is cfef=ti’Je”

The platen

;:;:;ot

adjusted.

Foreign substances are lodged in the paper path

- The PF motor not driving the

gear correctly

Check Point

Measure the resistance. It should be approximately 33.3 ohms. If

the

printhead

check the drivers. Check to see if the dot wires

are worn.

Check whether the tips of the wires are worn.

Set the gap adjustment lever to the first position, and check the platen gap. The appropriate value is 0.45 mm.

Perform a visual cheek of the

paper path.

Check that no foreign substance is lodged between the gears and that the gears

. are not broken or worn.

printhead

shorted,

coil

ak)

Solution

Replace the

printhead

drivers, if

necessary).

Replace the

printhead.

Replace the

printhead.

Adjust the

gap. Refer to

Section 4.1.1,

Platen Gap Adjustment.

Remove any foreign substances.

Remove any foreign

substances.

Replaoe

PF motor

assembly

reduction gears. Replace the paper pickup gears.

(and

the

The ribbon feed is abnormal.

The ribbon is

not turning.

Measure the coil resistance fo

The PF motor

assembly is approximate value should be defective. 56 ohms. If the motor is

The ribbon cartridge is defective.

Foreign substances are caught in

the gears.

the PF motor assembly. The PF motor

shorted, also check the drivers

Remove the ribbon cartridge, rotate its knob manually, and see if the ribbon feeds normally.

Check whether the RD ratchet

rotates when the carriage is moved manually.

r Replace the

. necessary).

assembly (and drivers, if

Replace the ribbon cartridge.

Remove any foreign

Suktam=

Replace the

ribbon feed

mechanism.

5-14

Rev.A

LX-300 Semice Manual

Table 5-9. Repairing the Printer Mechanism (Continued)

Troubleshooting

Problem

The ribbon feed is abnormal.

Paper becomes stained with ink.

Symptom

The ribbon feeds properly only when the carriage

moves ‘n ‘

dlrectlon (I.e.,

it fails to feed when the carnage

moves in the other direction).

Ink stains

appear on

areas where

there is print.

Cause

The planetary

:::;ve

Move the carriage manually;

~h=k whether the

gear turns in reverse and

engages the gear.

Cheek Point

Pknetay

Replace the ribbon feed mechanism.

The ribbon mask is positioned

Make sure the ribbon mask is in the correct position.

Reinstall the ribbon mask.

incorrectly. The platen Set the gap adjustment lever to

the

first

gap is not adjusted correctly.

position, and check the platen gap. The appropriate value is 0.47 mm.

Adjust the gap. Refer to

Swtbn ~ , ,

Platen G&”

Adjustment.

Solution

‘

Printing continues after the

paper ends or

when no

paper is

loaded.

Color printing

is abnormal.

Printing

continues past

the em of the

page.

The color does not change.

The color

ribbon is not

advanced.

The PE sensor is detective.

The

motor

assembly is defective.

The

ribbon is

caught in the

ribbon mask.

The CS motor

assembly is

defective.

The color

ribbon feed gears are

defective.

Check the PE sensor.

Measure the coil resistance for the

motor assembly. It should be approximately 150 ohms. If the motor is shorted, also check the drivers on the driver board.

Check

to see if the ribbon

mask is defective.

Measure the CS motor assembly coil resistance. It should be approximately 150 ohms. If the motor is shorted, also check the drivers on the driver board.

Replace the PE sensor.

Replace the

motor

assembly

(and drivers, if necessary).

Replace the

ribbon mask.

Replace the CS motor assembly

(and drivers, if

necessa~).

Check whether the ribbon Replace the advances when the printer is

ribbon feed

turned on. mechanism.

Rev.A

5-15

CHAPTER 6 Maintenance

Table of Contents

6.1 PREVENTIVE MAINTENANCE

6.2 APPLYING LUBRICATION

List of Figures

Figure 6-1. LX-300 Lubrication Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

List of Tables

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

Table 6-2. Lubrication Points. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6-1

LX-

Servica Manual

Maintenance

6.1 PREVENTIVE MAINTENANCE

Preventive maintenance includes regular cleaning of the case exterior (using denatured alcohol), as well as occasional vacuuming of the mechanism’s interior to remove dust and paper debris. After

cleaning the unit, check that it is adequately lubricated

returning the printer to the customer, inspect the springs, paper-feed rollers, and basic operation.

(as described in Section

6.2, below). Before

Disconnect the

Do not use thinner, of the printer.

printerfiom

trichloroethylene,

the external AC power source before performing maintenance.

or ketone-based solvents on the plastic components

6.2 APPLYING LUBRICATION

EPSON

lists each point along with its G-20, G26 and O-2, all of which have been tested extensively and found to comply with the needs of this printer. (Table 6-1 provides details about these lubricants.) Before applying a lubricant, be

sure that the surface to be lubricated is clean. Do not apply too much lubricant, as this may

darnage nearby parts.

recommends that the

Type

Grease

Oil

printer be lubricated at the points illustrated in Figure

recommen

Name

G-26

G-20

o-2

Table 6-2. Lubrication Points

61.

ded lubricant. The recommended lubricants are EPSON

Table 6-1. Lubrication

Quantity

40 gm EPSON 40 gm

40CC

Availability

EPSON EPSON

Part No.

B702600001

B702ml

B703700001

Table 6-2

Ref. No.

(1)

(2)

(3) The shafts for the gear train on the right frame.

(4) (5) The oil pad in the carriage assembly.

(6)

(7)

(8)

(9) (lo) (11) The contact point of the driven pulley shaft and drive pulley. (12) The contact point of the driven pulley shaft and drive pulley.

Note:

The hooks that attach the CR motor assembly to the base frame. (3 places)

The shafts for the gear train on the left frame.

The contact surface of the release lever and tractor transmission gear.

The teeth of gear 34. The point at which the platen ground spring contacts the platen shaft. The

pottions

The contact portion of the left tractor frame and tractor shaft. The contact point of the right tractor frame and tractor shaft.

Lubrication must be applied during the reassembly process.

of the carriage assembly that

Lubrication Pointa

oontacts

the CR guide frame.

Lubricant

G-26 G-26

o-2

G-26 G-20

G-26 G-26 G-26 G-26 G-26

Maintenance

LX-300 Service Manual

[

k.-..

M-)

IL-

6-2

f’:

Figure 6-1. LX-300 Lubrication Points

Rev.A

(

Appendix

Table of Contents

A.1

CONNECTOR SUMMARY

A.2 CIRCUIT DIAGRAM

A.3 CIRCUIT BOARD COMPONENT LAYOUT

A.4 EXPLODED DIAGRAM

A.5 CASE OUTLINE DRAWING

List of Figures

Figure A-1. Figure A-2. Figure A-3. Figure A-4.

Figure A-5. Figure A-6. Figure A-7. Figure A-8. Figure A-9.

Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

C130MAlN Board Assembly Circuit Diagram. . . . . . . . . . . . . . . . . A-5

C130 C130

C130 MAIN Board Assembly Component Layout. . . . . . . . . . . . . . A-9

C130 PSB/PSE Board Assembly Component Layout. . . . . . . . . . . A-9

LX-300 Exploded Diagram (l). . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10

LX-300 Exploded Diagram (2). . . . . . . . . . . . . . . . . . . . . . . . . . . . A-n

LX-300CaseOutline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-14

PSB

Board Assembly Circuit Diagram . . . . . . . . . . . . . . . . . A-7

PSE

Board Assembly

Cirwit

A-1

A-5

A-9

A-10

A-14

Diagram i . . . . . . . . . . . . . . . . A-8

List of Tables

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

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

Table A-10. Part No. Reference Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-13

CN2 . . . . . . . . . . . . . . . . . . . . . . . . . A-2

CN3 . . . . . . . . . . . . . . . . . . . . . . . . . A-2

CN4 . . . . . . . . . . . . . . . . . . . . . . . . . A-2

CN5 . . . . . . . . . . . . . . . . . . . . . . . . . A-3

CN6 . . . . . . . . . . . . . . . . . . . . . . . . . A-3

CN7 . . . . . . . . . . . . . . . . . . . . . . . . . A-3

CN8 . . . . . . . . . . . . . . . . . . . . . . . . . A-3

CN9,CNI0,CN11 . . . . . . . . . . . . . . . A-3

Appendix

A.1 CONNECTOR SUMMARY

LX3W

Service

Mhnual

Figure A-1 illustrates how the primary components are functions and sizes of the connectors.

I printer Mechanism

MOTOR

ASSY.,PF

Release Lever Position Sensor

El’

EEcl

HOST

COMPUTER

CN1

-P

BOARD

ASSY.,MAIN

comected.

Table A-1 sumrnari

BOARD

PSB

ASSY.,

PSE

zes the

Figure A-1. Cable

Connections

CN1O

BOARD

, ---------------------

[Color

Upgrade Kit

.- . . . . . . . . . . . . . .

CN11

...$

Rev.A

A-1

LX-300 Service Manual

Board

Main Board Assembly

Connector

Table A-2. Connector Pin Assignments -

Table A-1. Connector Summary

Function

CN1 CN2 CN3 CN4

CN5 CN6 CN7 CN8

CN9

CN1O

CN11

Parallel, serial interface CR motor assembly PF motor assembly

PSWPSE

Printhead PE sensor HP sensor Release lever position sensor CS motor assembly (optional)

Color ribbon sensor (optional) CS motor assembly (optional)

Color ribbon sensor (optional)

board assembly

CN2

Appendix

Pins

—

6 6 5

2 2 2

,. .,,

+ .

. . . .

2 3 4

5 6

2 3 4

5 6

I/o

0 CR-A 0

Signal Name

CR A CR B

CRCOM CRCOM

CR-B

CR motor assembly Phase A CR motor assembly Phase B CR motor assembly Common CR motor assembly Common

CR motor assembly Phase –A

CR motor assembly Phase –B

Function

Table A-3. Connector Pin Assignments -

I/o

0 0

Signal Name

PF A PF B PF motor assembly Phase B

PFCOM PFCOM

-A

PF -B

PF motor assembly Phase A

PF motor assembly Common PF motor assembly Common PF motor assembly Phase –A PF motor assembly Phase –B

Function

Table A-4. Connector Pin Assignments - CN4

CN3

A-2

1 I 2 3 4

I/o

Signal Name

GND

VL VL

+35

VDC

+35

VDC

Signal ground Signal ground DC voltage for logic

voltage for logic

Function

Rev.A

Appandix

LX-31M

Table A-5. Connector Pin Assignments - CN5

Service Manual

6 7 8

9 10 11 12

I/o

0 0 0

0 0 0 0 0

Table A-6. Connector Pin Assignments -

I/o

–

Signal Name

HD 7

HD 1

HD 5 HD 3

HDCOM HDCOM HDCOM

HD 2 Head data 2 HD 9 Head data 9 HD 4 HD 8 HD 6 Head data 6

Signal Name

PE PE sensor

GND

Head data 7

Head data 1

Head data 5 Head data 3 Common (VP) Common (VP) Common (VP)

Head data 4

Head data 8

Signal ground

Function

CN6

Function

1 I

Table A-7. Connector Pin Assignments -

I/o

Signal Name

GND

HP sensor Signal ground

Funotion

Table A-8. Connector Pin Assignments -

I/o

Signal Name Function

RELSW

GND

Release Lever Position Sensor Signal Ground

CN7

CN8

Table A-9. Connector Pin Assignments - CN9,CN1O,CN11

2 3 4

7 8

I/o

–

0 0 0 0

Signal Name

+35

CS-HOLD +5V

Cs A CS-A CS

CS-B

GP Ccsw

GND

Function

+35

VDC

motor assembly Phase A

motor assembly Phase –A

motor assembly Phase B

motor assembly Phase –B Signal ground Color ribbon sensor Signal ground

Rev.A

A-3

Appendix

LX41M Service Manual

ml-

—

Rev.A

Figure A-3. C130 PSB Board Assembly Circuit Diagram

A-7

Epson LX300 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

PRECAUTIONS

REVISION SHEET

TABLE OF CONTENTS

1.2 SPECIFICATIONS

3.2 DISASSEMBLY AND ASSEMBLY

Appendix