Epson ActionPrinter 3000 LQ-200 User manual

EPSON
®
LQ-200
ActionPrinter
TM
3000
Service Manual
Revision Level
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 ...........................................................................................
l-l
Specifications ...................................................................................
1-3
Hardware Specifications
............................................................
l-3
Firmware Specifications (ESCYP)
...............................................
l-9
Parallel Interface.............................................................................
1-14
DIP Switches and Jumpers
..............................................................
1-18
DIP Switches..............................................................................
l-18
Jumpers .....................................................................................
l-20
Operating Instructions ....................................................................
1-21
SelecType ...................................................................................
1-21
Self Test .....................................................................................
1-21
Demonstration
...........................................................................
l-22
Hexadecimal Dump Function
....................................................
l-23
Bit Image Printing
....................................................................
l-24
Error Conditions ........................................................................
1-25
Buzzer Operation
.......................................................................
l-25
Printer Initialization
.................................................................
1-26
Default Values
...........................................................................
l-27
Head Adjust Lever..
................................................................... 1-28
Printhead Protection During Heavy Duty Printing..
............... 1-29
Main Components
............................................................................
l-29
CO64 MAIN PCB
.......................................................................
l-30
Control Panel PCB
....................................................................
l-30
PEBFIL-II PCB ..........................................................................
1-31
Transformer ...............................................................................
1-31
Model 5ClO Printer Mechanism
................................................
1-32
Housing......................................................................................
1-33
Chapter 2
Principles of Operation
Overview ..........................................................................................
2-l
Connector Summary
..................................................................
2-l
Overview of Printer Mechanism Operation
.............................. 2-3
Circuit Overview
........................................................................
2-7
Firmware Overview
...................................................................
2-8
Principles of Operation
....................................................................
2-9
Power Supply Circuit
.................................................................
2-9
Reset Circuit ..............................................................................
2-25
Address Decoder and Bank Register
.........................................
2-29
Carriage Operation ...................................................................
2-30
Paper Feeding ...........................................................................
2-43
Printhead...................................................................................
2-47
A/D Converter Circuit ...............................................................
2-52
Host Interface ............................................................................
2-55
Ribbon Feed Mechanism............................................................
2-56
LQ200/AP3000
V

Chapter 3
Disassembly and Assembly
General Repair Information
............................................................
3-l
Tools...........................................................................................
3-2
Small Parts
................................................................................
3-3
Service Checklist .......................................................................
3-5
Disassembly and Assembly
.............................................................
3-6
Removing the Printhead
........................................................... 3-7
Removing
the Case..
..................................................................
3-8
Removing the Circuit Boards..
..................................................
3-11
Removing the Printer Mechanism
............................................
3-14
Disassembling the Printer Mechanism..
...................................
3-19
Chapter 4
Adjustment
Adjustment Overview
......................................................................
4-1
Adjusting the Platen Gap................................................................
4-1
Adjusting the Bidirectional Printing Alignment..
..........................
4-4
VRl and VR2 Specifications
......................................................
4-5
Adjustment Procedures ............................................................. 4-6
Chapter 5
Troubleshooting
Procedure for Troubleshooting the Printer
.....................................
5-1
Unit Replacement
.......................................................................... 5-1
Repair of the Main Board..
..............................................................
5-10
Repair of the Printer Mechanism....................................................
5-17
Chapter 6 Maintenance
Preventive Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1
Lubrication and Adhesive Application
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1
LQ-2OO/AP3000

Appendix
Connector Summary........................................................................
A-1
Circuit Diagrams............................................................................. A-3
Circuit Board Component Layout................................................... A-7
Exploded Diagrams.......................................................................... A-8
Case Outline Drawings.................................................................... A-12
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.
LQ200/AP3000 vii

Chapter 1
General Description
Features...........................................................................................
1-1
Specifications...................................................................................
1-3
Hardware Specifications............................................................
1-3
Firmware Specifications (ESCYP)
...............................................
1-9
Parallel Interface.............................................................................
1-14
DIP Switches and Jumpers..............................................................
1-18
DIP Switches..............................................................................
1-18
Jumpers.....................................................................................
1-20
Operating Instructions....................................................................
1-21
SelecType...................................................................................
1-21
Self Test.....................................................................................
1-21
Demonstration...........................................................................
1-22
Hexadecimal Dump Function....................................................
1-23
Bit Image Printing....................................................................
1-24
Error Conditions........................................................................
1-25
Buzzer
Operation.......................................................................
1-25
Printer Initialization.................................................................
1-26
Hardware initialization.......................................................
1-26
Software initialization.........................................................
1-26
Default Values...........................................................................
1-27
Head Adjust Lever.....................................................................
1-28
Printhead Protection During Heavy Duty Printing..
............ 1-29
Main Components............................................................................
1-29
C064 MAIN PCB.......................................................................
1-30
Control Panel PCB....................................................................
1-30
PEBFIL-II PCB..........................................................................
1-31
Transformer...............................................................................
1-31
Model 5C10 Printer Mechanism................................................
1-32
Housing..................................................................................
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.........................................................
1-2
Pin Configuration.....................................................
1-3
Printable Area for Single Sheet Paper....................
1-5
PrintableArea forContinuous
Paper ...................... 1-6
Character Matrix......................................................
1-13
Data Transmission Timing......................................
1-14
Self Test....................................................................
1-21
Demonstration..........................................................
1-22
Hexadecimal Dump..................................................
1-23
Head Adjust Lever....................................................
1-28
LQ-200/AP3000ComponentLayout.........................
1-29
C064 MAIN PCB......................................................
1-30
Control Panel PCB...................................................
1-30
PEBFIL-II PCB
.........................................................
1-31
LQ-200/AP3000

Figure 1-15. Transformer ..............................................................
1-31
Figure 1-16. Model 5ClO Printer Mechanism ..............................
1-32
Figure 1-17. Housing.....................................................................
1-33
Tables
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..........................................................
1-2
Specifications for Single
Sheet Paper
......................
1-4
Specifications for Continuous Paper........................
1-4
Specifications for Labels...........................................
1-4
Built-In Fonts...........................................................
1-9
Printing Modes.........................................................
1-11
Character Matrix and Character Size......................
1-12
Connector Pin Assignments and
Signal Functions ..................................................
1-15
Handshaking (DCl/DC3) Protocol............................
1-17
DIP Switch Set 1 ......................................................
1-18
DIP Switch Set 2 ......................................................
1-18
International Character Set and
Character Table Selection.. ..................................
1-19
Font Selection...........................................................
1-19
Page Length Selection..............................................
1-20
Character Pitch Selection ........................................
1-20
Print Density............................................................
1-24
Bit Image Printing...................................................
1-24
Head Adjust Lever....................................................
1-28
LQ-200/AP3000

General Description 1
Features
The Epson
®
LQ-200/ActionPrinter
TM
3000 (AP3000) is a small, light-weight, low-
cost 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:
192 cps (draft, 12 cpi)
160 cps (draft, 10 cpi)
64 cps (letter quality, 12 cpi)
53 cps (letter quality, 10 cpi)
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.
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.
Table 1-1. Optional Units
Model
Description
7341 Cut sheet feeder (CSF)
1-2
Figure 1-1. LQ-200/AP300
LQ-2OO/AP3000

General Description
Specifications
This section provides the specifications for the LQ-200/AP3000.
Hardware Specifications
Printing Method Serial, impact, dot matrix
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

General Description
Printable Area
Figure 1-3.
Printable Area for Single Sheet Paper
Notes:
1)
.
.
.
0.12 inches (3 mm) or more using 7.2 to 9.0 inch (182 to 229 mm) wide paper. 1.08 inches
(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.
LQ-200/AP3000
1-5

General Description
Figure 1-4.
Printable Area for Continuous Paper
Notes:
*1)
0.52 inches (13 mm) or more using 4.0 to 9.5 inch (101 to 242 mm) wide paper.
1.04 inches (26 mm) or more using 10.0 inch (254 mm) wide paper.
‘2)
0.52 inches (13 mm) or more using 4.0 to 9.5 inch (101 to 242 mm) wide paper.
1.04 inches (26 mm) or more using 10.0 inch (254 mm) wide paper.
1-6
LQ-2OO/AP3000

General Description
Ink Ribbon
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 11.72 inches (width)
x 1.36 inches (height)
of Ribbon
x 2.88 inches (depth)
Cartridge
(293 mm x 34 mm x 72 mm)
Reliability
Mean Cycles
Between
Failure
(MCBF)
3 million lines (excluding printhead)
Mean Time
Between
Failure
(MTBF) 40000 power-on hours POH) at 25% duty
Printhead Life 200 million strokes (black ribbon)
100 million strokes (film ribbon)
Safety Approvals
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 49.5 to 50.5 Hz (50 Hz model)
Range 59.5 to 60.5 Hz (60 Hz model)
Current
Rating 1.8 A
Power
Approximately 38 W (during self test in draft
Consumption mode at 10 cpi)
Insulation 10 megohms minimum between AC line and
Resistance
chassis
Dielectric 1250 VAC (rms), 1 minute
Strength between AC line and chassis
Environmental Conditions
Temperature 41° to 95’F (5O to 35OC), operating
-22O to 140°F (-30° to 60°C), in shipping
container
Humidity 10 to 80 % RH, operating
5 to 85 % RH, storage
Resistance 1 G, within 1 ms, operating
to Shock 2 G, within 1 ms, storage
Resistance 0.25 G, 55 Hz maximum, operating
to Vibration 0.50 G, 55 Hz maximum, storage
Physical Specifications
Weight Approximately 14.1 lb (6.4 kg)
Dimensions 15.6 inches (width) x 12.8 inches (depth)
x 5.6 inches (height)
(390 mm x 320 ‘mm x 139 mm)
excluding knob and paper guide
1-8
LQ-200/AP3000

General Description
Firmware Specifications (ESC/P)
Control Codes ESC/P level ESC/P 84 (Epson Standard Code for Printers)
Printing Direction Bidirectional (text)
Bidirectional (bit image) when DIP switch 2-5 is on
Unidirectional (bit image) when DIP switch 2-5 is off
Input Data Buffer 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.)
Character Code 8 bits
Character Sets 96-character ASCII character set
14 international character sets
Legal character set
PC (character tables for the Personal Computer) 437, 850,
860,863,865
Built-In Fonts
See Table 1-5.
Table 1-5. Built-h Fonts
Notes:
lo = 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 You can select and mix any of the following printing modes,
except you cannot select 15 cpi and condensed printing at the
same time.
l
Draft or letter quality printing
l
Character pitch (10 cpi, 12 cpi, 15 cpi, or proportional
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
Printing Speed
See Table 1-6.
Printing Columns
See Table 1-6.
Character Matrix
See Table 1-7.
Character Size See Table 1-7.
1-10
LQ-200/AP3000

General Description
Table 1-6. Printing Modes
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