Epson LX300 User Manual

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

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

2-10

~ f=::,

. .

+ 77 hidden pages

Epson LX300 User Manual

PRECAUTIONS

REVISION SHEET

TABLE OF CONTENTS

1.2 SPECIFICATIONS