Epson Action Printer 3000, LQ-200 Service Manual

®

EPSON

LQ-200

TM

ActionPrinter

Service Manual

Revision Level

3000

I@

Printed on recycled paper.

FCC Compliance Statement

For American Users

This equipment has been tested and found to comply with limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection

against harmful interference in a residential installation. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that

interference will not occur in a particular installation. If this equipment does cause harmful

interference to radio or television reception, which can be determined by turning the equipment off

and on, the user is encouraged to try to correct the interference by one or more of the following

measures:

l

Reorient or relocate the receiving antenna.

l

Increase the separation between the equipment and the receiver.

l

Connect the equipment to an outlet on a circuit different from that to which the receiver is

connected.

l

Consult the dealer or an experienced radio/TV technician for help.

CAUTION: The connection of a nonshielded equipment interface cable to this equipment

will invalidate the FCC Certification of this device and may cause interference levels that

exceed the limits established by the FCC for this equipment. It is the responsibility of the

user to obtain and use a shielded equipment interface cable with this device. If this

equipment has more than one interface connector, do not leave cables connected to unused

interfaces.

Changes or modifications not expressly approved by Epson America, Inc., could void the user’s
authority to operate this equipment.

For Canadian Users

This digital apparatus does not exceed the Class B limits for radio noise emissions from digital

apparatus as set out in the radio interference regulations of the Canadian Department of
Communications.

Le present appareil numérique n’èmet pas de bruits radioélectrique dépassant les limites
applicables aux appareils numériques de Classe B prescrites dans le règlement sur le brouillage
radioélectriques édicté par le Ministère des Communications du Canada.

LQ-2OO/AP3000

iii

Important Notice

Disclaimer of Warranty

Epson America makes no representations or warranties, either express or implied, by or with
respect to anything in this manual, and shall not be liable for any implied warranties of
merchantability and fitness for a particular purpose or for any indirect, special, or consequential
damages. Some states do not allow exclusion of incidental or consequential damages, of this
exclusion may not apply to you.

Copyright Notice

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or
otherwise, without the prior written permission of Epson America, Inc. No patent liability is
assumed with respect to use of the information contained herein. While every precaution has been
taken in the preparation of this publication, Epson America assumes no responsibility for errors or
omissions. Neither is any liability assumed for damages resulting from the use of the information
contained herein. Further, this publication and the features described herein are subject to change
without notice.

Trademarks

Epson and ESC/P are registered trademarks of Seiko Epson Corporation.
ActionPrinter is a trademark of Epson America, Inc.

General Notice: Other product names are used herein for identitication purposes only and may be

trademarks of their respective companies.

Copyright © 1991 by Epson America, Inc.

Torrance, CA 90509

iv

LQ-2OO/AP3000

Chapter 1

General Description

Features
Specifications

Parallel Interface
DIP Switches and Jumpers

Operating Instructions

Main Components

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

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

Hardware Specifications
Firmware Specifications (ESCYP)

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

DIP Switches
Jumpers

SelecType
Self Test
Demonstration

Hexadecimal Dump Function
Bit Image Printing
Error Conditions
Buzzer Operation

Printer Initialization

Default Values

Head Adjust Lever..

Printhead Protection During Heavy Duty Printing..

CO64 MAIN PCB

Control Panel PCB

PEBFIL-II PCB

Transformer

Model 5ClO Printer Mechanism

Housing

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l-l
1-3
l-3
l-9
1-14
1-18
l-18
l-20
1-21

1-21
1-21
l-22
l-23
l-24
1-25
l-25
1-26
l-27
1-28

............... 1-29

l-29
l-30

l-30
1-31

1-31

1-32

1-33

Chapter 2

Overview

Connector Summary
Overview of Printer Mechanism Operation
Circuit Overview
Firmware Overview

Principles of Operation

Power Supply Circuit
Reset Circuit
Address Decoder and Bank Register
Carriage Operation
Paper Feeding
Printhead
A/D Converter Circuit
Host Interface
Ribbon Feed Mechanism

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

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

Principles of Operation

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2-l
2-l
2-3
2-7
2-8
2-9
2-9
2-25
2-29
2-30
2-43

2-47
2-52
2-55
2-56

LQ200/AP3000

V

Chapter 3

Disassembly and Assembly

General Repair Information

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

Tools
Small Parts
Service Checklist

Disassembly and Assembly

Removing the Printhead
Removing
Removing
Removing the Printer Mechanism

Disassembling

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

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

the

Case..

the Circuit

the

Chapter 4

Adjustment Overview
Adjusting the Platen Gap
Adjusting

VRl and VR2 Specifications
Adjustment Procedures

the Bidirectional

Chapter 5

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

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

........................................................... 3-7

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

Boards..

Printer

Mechanism..

Adjustment

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

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

Printing Alignment..

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

Troubleshooting

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

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

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

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

3-l
3-2
3-3
3-5
3-6

3-8

3-11
3-14

3-19

4-1

4-1

4-4
4-5
4-6

Procedure for Troubleshooting the Printer
Unit Replacement

Repair

Repair of the Printer Mechanism

of the

Chapter 6

Preventive Maintenance
Lubrication and Adhesive Application

.......................................................................... 5-1

Main Board..

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

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

Maintenance

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

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

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

5-1
5-10

5-17

6-1
6-1

LQ-2OO/AP3000

Appendix

Connector Summary........................................................................

Circuit Diagrams

Circuit Board Component Layout ...................................................

Exploded Diagrams
Case Outline Drawings

Subsequent product modifications will be brought to your attention via Service
Bulletins. Please revise the text as bulletins are received.

This document is subject to change without notice.

Note:

This manual uses minus signs (-) in front of signals to indicate that they
are active LOW signals.

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

.......................................................................... A-8

.................................................................... A-12

A-1
A-7

LQ200/AP3000 vii

Chapter 1

General Description

Features
Specifications

Parallel Interface

DIP Switches and Jumpers

Operating Instructions

Main Components

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

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

Hardware Specifications
Firmware Specifications (ESCYP)

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

DIP Switches

Jumpers

SelecType
Self Test
Demonstration
Hexadecimal Dump Function
Bit Image Printing
Error Conditions
Buzzer

Printer Initialization

Default Values
Head Adjust Lever
Printhead Protection During Heavy Duty Printing..

C064 MAIN PCB
Control Panel PCB
PEBFIL-II PCB
Transformer
Model 5C10 Printer Mechanism

Housing

Operation..

Hardware initialization
Software initialization

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

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1-1
1-3

1-3
1-9

1-14

1-18
1-18
1-20
1-21
1-21
1-21
1-22
1-23
1-24
1-25
1-25

1-26
1-26
1-26
1-27
1-28
1-29
1-29

1-30
1-30
1-31
1-31
1-32

1-33

Figures

Figure l-l.
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.
Figure 1-11.
Figure 1-12.
Figure 1-13.
Figure 1-14.

LQ-200/AP3000

LQ-200/AP3000
Pin Configuration
Printable Area for Single Sheet Paper
Printable
Character Matrix
Data Transmission Timing
Self Test
Demonstration
Hexadecimal Dump
Head Adjust Lever
LQ-200/AP3000

C064 MAIN PCB......................................................

Control Panel PCB
PEBFIL-II PCB

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

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

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

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

Area forContinuous

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

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

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

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

ComponentLayout..

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

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

Paper

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

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

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

1-2
1-3
1-5
1-6
1-13
1-14
1-21
1-22
1-23
1-28
1-29
1-30
1-30
1-31

Figure 1-15.
Figure 1-16.
Figure 1-17.

Tables

Transformer
Model 5ClO Printer Mechanism

Housing

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

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

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

1-31
1-32
1-33

Table 1-1.
Table 1-2.
Table 1-3.
Table 1-4.
Table 1-5.
Table 1-6.

Table 1-7.
Table 1-8.

Table 1-9.
Table 1-10.
Table 1-11.
Table 1-12.

Table 1-13.
Table 1-14.
Table 1-15.
Table 1-16.
Table 1-17.

Table 1-18.

Optional Units
Specifications for
Specifications for
Specifications for Labels

Built-In Fonts

Printing Modes
Character Matrix and Character Size..

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

Single

Sheet Paper

Continuous Paper..

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

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

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

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

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

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

Connector Pin Assignments and

Signal Functions
Handshaking (DCl/DC3) Protocol
DIP Switch Set 1
DIP Switch Set 2

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

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

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

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

International Character Set and

Character

Table
Font Selection
Page Length

Character Pitch Selection
Print Density

Bit Image Printing

Head Adjust Lever

Selection.. ..................................

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

Selection

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

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

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

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

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

1-2
1-4

1-4
1-4
1-9
1-11
1-12

1-15
1-17
1-18
1-18

1-19

1-19
1-20
1-20

1-24

1-24
1-28

LQ-200/AP3000

General Description

1

Features

The Epson® LQ-200/ActionPrinterTM 3000 (AP3000) is a small, light-weight, low­cost printer similar to the LQ-500. The printer’s main features are:

Epson ESC/P® code printing, implemented as a standard feature
These printing speeds:

Clear, easy-to-read printing with standard Epson fonts
Seven built-in letter quality (LQ) fonts (Roman, Sans Serif, Courier, Prestige,

Script, OCR-B, and Orator)

Direct built-in font selection using control panel buttons

Automatic loading for single sheet paper

Two paper slots (rear and bottom)
Easy handling of single sheet paper with the optional cut sheet feeder (CSF)
Standard Epson 8-bit parallel interface.

192 cps (draft, 12 cpi)
160 cps (draft, 10 cpi)
64 cps (letter quality, 12 cpi)
53 cps (letter quality, 10 cpi)

LQ-200/AP3000

l-l

General Description

Table l-l lists the optional units available for the printer and Figure l-l shows the

printer.

Model

7341

Table 1-1. Optional

Description

Cut sheet feeder (CSF)

Units

Figure 1-1. LQ-200/AP300

1-2

LQ-2OO/AP3000

Specifications

This section provides the specifications for the LQ-200/AP3000.

Hardware Specifications

Printing Method Serial, impact, dot matrix

General Description

Pin Configuration

24 wires; 12 x 2 staggered, diameter 0.008 inches (0.2 mm)

Figure 1-2. Pin Configuration

Feeding Methods Friction feed, tractor feed
Line Spacing 1/6 inch or programmable in units of 1/180 inch
Paper Insertion From rear or bottom
Paper Feed Speed

100 ms/line at 1/6-inch line feed

2.2 inches per second, continuous feed

Paper Specifications See Tables 1-2, 1-3, and 1-4.

LQ-200/AP3000

1-3

General Description

Table 1-2.

Specifications for Single Sheet Paper

Table 1-3. Specifications for Continuous Paper

Table 1-4. Specifications for Labels

1-4

LQ-2OO/AP3O00

Printable Area

General Description

Figure 1-3.

Notes:

0.12 inches (3 mm) or more using 7.2 to 9.0 inch (182 to 229 mm) wide paper.

1)

(27 mm) or more using 10.1 inch (257 mm) wide paper.

.

The lowest print position (0.54 inches or 13.5 mm) is only for reference.

.

Printing is possible approximately 1.48 inches (37 mm) from the bottom edge of the paper when
you press the AUTO LOAD button to load a single sheet.

.

Paper feeding accuracy is not assured within 0.88 inches (22 mm) from the top edge of the
paper and 1.20 inches (30 mm) from the bottom edge of the paper.

Printable Area for Single Sheet Paper

1.08 inches

LQ-200/AP3000

1-5

General Description

Figure 1-4.

Notes:

0.52 inches (13 mm) or more using 4.0 to 9.5 inch (101 to 242 mm) wide paper.

*1)

1.04 inches (26 mm) or more using 10.0 inch (254 mm) wide paper.

0.52 inches (13 mm) or more using 4.0 to 9.5 inch (101 to 242 mm) wide paper.

‘2)

1.04 inches (26 mm) or more using 10.0 inch (254 mm) wide paper.

Printable Area

for

Continuous Paper

1-6

LQ-2OO/AP3000

Ink Ribbon

General Description

Reliability

Type

Black ribbon cartridge #7753

Film ribbon cartridge #7768
Color Black
Life

2 million characters at 48 dots/character

(black ribbon)

0.2 million characters using LQ characters

(film ribbon)

Dimensions
of Ribbon
Cartridge

Mean Cycles
Between
Failure

(MCBF)

Mean Time
Between

Failure

(MTBF)

11.72 inches (width) x 1.36 inches (height)

x

2.88 inches (depth)

(293 mm x 34 mm x 72 mm)

3 million lines (excluding printhead)

40000 power-on hours POH) at 25% duty

Printhead Life

Safety Approvals

200 million strokes (black ribbon)

100 million strokes (film ribbon)

Safety
standards

UL478

Radio
Frequency
Interference
(RFI)

FCC class B

LQ-200/AP3000

1-7

General Description

Electrical Specifications

Power
Conditions

120 VAC * 10%

Frequency
Range

Current
Rating

Power

Consumption mode at 10 cpi)

Insulation
Resistance

Dielectric
Strength

Environmental Conditions

Temperature 41° to

Humidity

Resistance
to Shock

49.5 to 50.5 Hz (50 Hz model)

59.5 to 60.5 Hz (60 Hz model)

1.8 A
Approximately 38 W (during self test in draft

10 megohms minimum between AC line and

chassis

1250 VAC (rms), 1 minute

between AC line and chassis

95’F

(5O to

-22O

to 140°F (-30° to 60°C), in shipping

35OC),

operating

container

10 to 80 % RH, operating
5 to 85 % RH, storage

1 G, within 1 ms, operating
2 G, within 1 ms, storage

Resistance
to Vibration 0.50 G, 55 Hz maximum, storage

Physical Specifications

Weight
Dimensions 15.6 inches (width) x 12.8 inches (depth)

0.25 G, 55 Hz maximum, operating

Approximately 14.1 lb (6.4 kg)

x

5.6 inches (height)
(390 mm x 320 ‘mm x 139 mm)
excluding knob and paper guide

1-8

LQ-200/AP3000

Firmware Specifications (ESC/P)

General Description

Control Codes
Printing Direction

Input Data Buffer

Character Code
Character Sets

Built-In Fonts

ESC/P level ESC/P 84 (Epson Standard Code for Printers)

Bidirectional (text)

Bidirectional (bit image) when DIP switch 2-5 is on

Unidirectional (bit image) when DIP switch 2-5 is off
8KB when DIP switch 2-4 is on

1KB when DIP switch 2-4 is off
(When DIP switch 2-4 is on, you cannot define user-defined
characters.)

8 bits
96-character ASCII character set

14 international character sets
Legal character set

PC (character tables for the Personal Computer) 437, 850,
860,863,865

See Table 1-5.

Table 1-5. Built-h Fonts

Notes:

l o = resident, ‘I = proportional LQ font specified using ESC k, *2 = 15 cpi Courier

l

OCR-B and Orator are basically IO cpi fonts. However, you can select the typestyle and pitch for
these fonts.

l

You cannot select 15 cpi and condensed printing at the same time.

LQ-2OO/AP3000

1-9

General Description

Printing Modes

Printing Speed
Printing Columns

Character Matrix

You can select and mix any of the following printing modes,
except you cannot select 15 cpi and condensed printing at the
same time.

Draft or letter quality printing

l

Character pitch (10 cpi, 12 cpi, 15 cpi, or proportional

l

printing)

l

Condensed

l

Double-width

l

Double-height

l

Emphasized

l

Double-strike

l Italic

l

Underlined

l

Double-underlined

l

Overscore

l

Strike-through

l Outline
l Shadow

See Table 1-6.
See Table 1-6.

See Table 1-7.

Character Size

See Table 1-7.

1-10

LQ-200/AP3000

Table 1-6. Printing Modes

General Description

Notes:

l

Max is the value appropriate for the maximum width character.

l

Min is the value appropriate for the minimum width character.

.

-

means that the printer automatically selects LQ mode when you select proportional pitch.

LQ-200/AP3000

1-11

General Description

Table 1-7.

Character Matrix and Character Size

Notes:

l

HDD is the horizontal dot density in dots per inch.

l

The face matrix and character size indicate the size of the maximum character. This value
depends on the paper, the ribbon, and other variables.

l

Unit ESC SP indicates the minimum length to be added to the right of the character specified using
ESC SP. You can also send Unit Esc SP followed by the character string CHR$ (&h20).

.

-

indicates that printer firmware reshapes the character matrix. Character width is half of the

noncondensed character width.

1-12

LQ-2oo/AP3000

(Normal character)

General Description

LG-200/AP3000

Figure 1-5. Character Matrix

1-13

General Description

Parallel Interface

This section provides the specifications for the standard parallel interface.
Data Format
Synchronization

Handshaking
Signal Level
Adaptable

Connector
Data Transmission

Timing

8-bit parallel

-STROBE signal
BUSY and -ACKNLG signal
TTL compatible

57-30360 (Amphenol) or equivalent

See Figure 1-6.

1-14

Figure 1-6. Data Transmission Timing

LQ-200/AP3000

General Description

Table 1-8 shows the connector pin assignments and signal functions of the 8-bit
parallel interface.

Table 1-8.

Connector Pin Assignments and Signal Functions

LQ-200/AP3000

1-15

General Description

Table 1-9.

Notes:

DIR refers to the direction of signal flow as viewed from the printer.

Connector Pin Assignments and Signal Functions (cont.)

Return Pin No. denotes a twisted pair return line.

The cable must be shielded to prevent noise.

All interface conditions are based on TTL levels. The rise and fall times of all signals must be less
than 0.2 ,us.

You can set the -AUTO FEED-XT signal to LOW using DIP switch 2-4.

You can set the -SLCT-IN signal to LOW using jumper 6.

By setting the DATA 1 through 8 pins to the -STROBE signal, you can perform printing tests,

including interface circuit tests, without using external equipment.

Minus signs are used in front of signal names indicate active LOW signals.

1-16

LQ-200/AP3000

Table 1-9 shows the handshaking (DC1/DC3) protocol.

Table 1-9. Handshaking (DC1/DC3) Protocol

General

Description

Notes:

1.

Table 1-9 assumes that no *ERROR status exists other than that due to off line mode.

2.

When the printer receives a DC3 code, it ignores input data. When the printer receives a DC1
code, data transmission continues.

3.

The DC1 and DC3 codes are enabled only when the SLCT-IN signal (pin number 36) is HIGH and
the printer is initialized.

4.

If the SLCT-IN signal is LOW when the printer is initialized, DC1/DC3 handshaking is invalidated
and the printer ignores the DC1/DC3 control codes.

5.

If the SLCT-IN signal is HIGH when the printer is initialized, the printer starts from the selected
(DC1) state.

6.

Minus signs are used in this table to indicate active LOW signals.

LQ-200/AP3000

1-17

DIP Switches and Jumpers

This section describes the functions of the DIP switches and jumpers.

DIP Switches

The LQ-200/AP3000 has two sets of DIP switches underneath the cartridge slot cover.
Tables 1-10 through 1-15 describe the functions of these DIP switches. The printer reads
the DIP switch settings only at power on or after receiving the -INIT signal.

Table 1-10. Dip Switch Set 1

Notes:

l

1. When DIP switch 2-4 is on, you cannot create user defined characters.

l

2. When DIP switch 2-5 is on, you can select bidirectional graphics printing using ESC UO.

1-18

General Description

Table 1-12. International Character Set and Character Table Selection

Table 1-13. Font Selection

LQ-200/AP3000

1-19

General Description

Table 1-14. Page Length Selection

Table 1-15. Character Pitch Selection

Jumpers

Jumper 6, located underneath the cartridge slot cover, is user selectable. If you
connect jumper 6, the -SLCT-IN signal is LOW and the printer ignores the

DC1/DC3 control codes.

1-20

LQ-200/AP3000

General Description

Operating Instructions

This section explains how to use SelecType, the self test, the demonstration, the
hexadecimal dump, and other functions.

SelecType

The SelecType function allows you to easily choose any of the seven built-in LQ
fonts when the printer is on line and not printing. To select a font, you press the
FORM FEED button until the two SelecType indicator lights match the desired
font.

Self Test

To run the self test in draft mode, turn on the printer while pressing the LINE
FEED button. To run the self test in letter quality (LQ) mode, turn on the printer
while pressing the FORM FEED button.

To stop or start the self test, press the ON LINE button. To end the self test, press
the ON LINE button and then turn off the printer.

The first line of the self test shows the firmware revision number. Next the self
test prints the current DIP switch settings.

Figure 1-7. Self Test

LQ-200/AP3000

1-21

General Description

Demonstration

To start the demonstration, turn on the printer while holding down the LINE
FEED and ON LINE buttons.

THE EPSON® LQ-200

The Epson LQ-200 is the affordable, versatile, narrow carriage 24­pin dot matrix printer
excellent high resolution printing,

for home and small business combining

convenient paper handling, and

a new standard for economical printing.

LOOK AT WHAT THE LQ-200 CAN DO FOR YOU!

n

Outstanding 24-pin print qualitym Sharp180 x 360 DPI graphics.

w

192

CPS

draft print SP'

-” 1.0 Drint

+ional cut sheet feeder

‘;mitaA

.

..-

Figure 1-8. Demonstration

1-22

LQ-200/AP3000