Page 1
EPSON LQ-2080
Impact Serial Dot Matrix Printer
SEDM98002
®
Page 2
Notice:
All ri
g
hts reserved. No part of this manual may be reproduced, stored in a retrieva l system, or transmitted in any form or by any means,
electronic, mechanical, photocopyin
g
, recording, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION.
The contents of this manual are subject to chan
g
e without notice.
All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON
would
g
reatly appreciate being informed of them.
The above not withstandin
g
SEIKO EPSON CORPORATION can assume no responsibility for any errors in this manual or the consequences
thereof.
EPSON is a re
g
istered trademark of SEIKO EPSON CORPORATION.
General Notice: Other product names used herein are for identification purpos e only and may be trademarks or re
g
istered trademarks of their
respective owners. EPSON disclaims any and all ri
g
hts in those marks.
Copyri
g
ht © 1996 SEIKO EPSON CORPORATION. Printed in Japan.
Page 3
PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1)Personal injury and 2) damage to equipment.
DANGER
Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in
performin
g
procedures preceded by DANGER Headings.
WARNING
Signals a precaution which, if ignored, could result in damage to equipment.
The precautionary measures itemized below should always be observed when performin
g
repair/maintenance procedures.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE
OR REPAIR PROCEDURES.
2. NOWORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED FOR
ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK.
3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL
INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON
POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.
W ARNING
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN.
2. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, 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.
4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS ANTISTATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.
5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THE MANUFACTURE; INTRODUCTION OF
SECOND-SOURCE ICs OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON
WARRANTY.
Page 4
PREFACE
This manual describes basic functions, theory of electrical and mechanic al operati ons, maint enance and rep air procedures of EPSON LQ-2080. The
instructions and procedures included herein are intended for the experienced repair t e chnicians, and attention should be
g
iven to the precautions on
the precedin
g
page. The chapters are organized as follows:
CHAPTER 1. PRODUCT DESCRIPTIONS
Provides a general overview and specifications of the product.
CHAPTER 2. OPERATING PRINCIPLES
Describes the theory of electrical and mechanical operations of the product.
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
Describes the step-by-step procedures for disassembling and assembling the
product.
CHAPTER 4. ADJUSTMENTS
Provides Epson-approved methods for adjustment.
CHAPTER 5. TROUBLESHOOTING
Provides the step-by-step procedures for troubleshooting.
CHAPTER 6. MAINTENANCE
Provides preventive maintenance procedures and the lists of Epson-approved
lubricants and adhesives required for servicing the product.
APPENDIX
Provides the following additional information for reference:
• EEPROM Address Map
• Connector Pin Assignments
• C273 Main Board Component Layout
• C273 Main Board Circuit Diagram
Page 5
Revision Status
Revision Issued Date Description
A March 08, 1999 First release
Page 6
Revision A
6
Contents
Product Description
Specifications ........................................ ....... .................................................. 8
Features ................................................................................................................ 8
Accessories .......................................................................................................... 8
Hardware Specifications
.................................................. ....... ...... ....... ...... ..... 9
Printing Method ............................................................. ...... ...... ............................ 9
Printing Specifications .......................................................................... ...... ..... ...... 9
Paper Handling ........................................ ...... .................................................. ...... 9
Paper Specifications ................................ ...... ..... ................................................. 11
Ribbon Specificatio .............................................................................................. 11
Electrical Specifications ........................................................................ ...... ..... .... 11
Environtal Conditions .......................................................................................... 11
Reliability ............................................................................................................. 11
Safety Approvals ................................................................................................. 12
CE Marking .......................................................................................................... 12
Physical Specifications ........................................................ ................................ 12
Firmware Specifications
............................................................................... 13
Control Codes and Fonts .................................................................................... 13
Interface Specifications ....................................................................................... 15
Parallel Interface (Forward Channel) .................................................. 15
Parallel Interface (Reverse Channel) ................................................. 15
Operation Instruction .................................................................................... 16
Errors ................................................................................................................... 17
EEPROM Initialization ......................................................................................... 18
Main Components
......................................................................................... 19
C273 Main Board ................................................................................................ 20
Operating Principles
Printer Mechanism Operations ...................................................................... 22
Power Supply Operation ............................................................................... 22
Control Circuit .............................................................................................. 23
Overview of Control Circuit Operation ................................................................. 23
System Reset Circuit ........................................................................................... 25
Printhead Driver Circuit ....................................................................................... 26
CR Motor Driver Circuit ....................................................................................... 27
PF Motor Driver Circuit ....................................................................................... 29
EEPROM Control Circuit ..................................................................................... 29
Sensor Circuits ................................................................................................... 30
Disassembly and Assembly
Adjustment
Overview ...................................................................................................... 34
Pre-operation for the Adjustment Program ......................................................... 34
Bi-D Adjustment .................................................................................................. 36
TPE Level Reset ................................................................................................. 37
Writing the User-characteristic Data ................................................................... 38
Troubleshooting
Overview ...................................................................................................... 41
Troubleshooting Information ........................................................................ 41
Printhead ............................................................................................................. 41
Sensors ............................................................................................................... 41
Motors ................................................................................................................. 41
The Error codes with Indicators and Buzzer ....................................................... 41
Unit Level Troubleshooting
........................................................................... 42
Repairing the C166 PSB/PSE Board .............................................................. 42
Repairing the C273 Main Board ..................................................................... 42
Repairing the Printer Mechanism .................................................................. 44
Maintenance
Appendix
EEPROM Address Map ................................................................................. 48
Connector Summary ..................................................................................... 51
Component Layout ....................................................................................... 52
Circuit Diagram ............................................................................................ 54
Page 7
PRODUCT DESCRIPTION
Page 8
LQ-2080 Revision A
Product Description Specifications 8
1.1 Specifications
The LQ-2080 is the revised model of the already existing LQ-2070.
Since the specifications for the both products are mostly common, the
information included in this section is limited to the it ems that are
specific to LQ-2080. For the rest of t he information, refer to the LQ-2070
Service Manual.
1.1.1 Features
Print speed: High speed draft: 400 cps
Draft: 300 cps
LQ: 100 cps at 10 cpi
Character tables: Standard version: 13 tables
NLSP version: 38 tables
Input data buffer: 0 Kbyte or 64 Kbyte
(depend on the default setting)
Acoustic noise: 50 dB (A) (ISO 7779 pattern)
Reliability: MVBF
*
: 19 million lines
(except printhead)
MTBF: 10,000 power on hours (POH)
Control codes: ESC/P2 and IBM 2391 Plus emulation
Copy capability: 1 original + 4 copies
Control panel functions: Font, Pause, Condensed Pause, Tear off,
Bin, LF/FF, Load/Eject, Micro Adjust,
Self-Test, Data Dump, and the Default
Setting
* : Mean print volume between failure (MTBF 25% duty cycle)
1.1.2 Accessories
Table 1-1. Items Included with the Printer
Table 1-2. Consumables and Optional Units
Enclosed Items Quantity
User's manual 1
Driver diskette 1
Ribbon cartridge 1
Power supply cable (230 V Version) 1
Unit Description
*1
*1: The number represented by an asterisk varies, depending on the country.
Ribbon cartridge S015086
Ribbon pack S010033
High-capacity cut sheet feeder (bin 1) C80673*
Second bin cut sheet feeder (bin 2) C80674*
Pull tractor unit C80032*
Roll paper holder #8310
Serial I/F card C82305* / C82306*
32KB intelligent serial I/F card C82307* / C82308*
32KB intelli gent parallel I/F card C82310* / C823 11*
Local Talk I/F card C82312*
32KB IEEE-488 I/F card C82313*
Coax I/F card C82314*
Twinax I/F card C82315*
IEEE-1284 parallel I/F card C82345*
Ethernet I/F card C82357*, C82362*, C82363**2, C82364*
*2: When you use Ethernet interface card (C82363*), you need to attach the
optional interface card adapter (C82525*) to the interface card.
Page 9
LQ-2080 Revision A
Product Description Hardware Specifications 9
1.2 Hardware Specifications
This section also contains information speci fic to the LQ-2080. For other
information, refer to the LQ-2070 Service Manual.
1.2.1 Printing Method
See the LQ-2070 Service Manual.
1.2.2 Printing Specifications
Copy capability: 1 original + 4 copies
Print speed and printable columns
Table 1-3. Print Speed and Printable Columns
NOTE:
1.When the power supply voltage drops to the lower l im it, the printer stops printing
and then starts printing on that line again more slowly than before.
2.When the head temperature rises to the upper limit, the printer stops printing.
When the head temperature falls to the normal level, the printer start printing
again more slowly than before.
1.2.3 Paper Handling
Friction feed (front, rear)
Push tractor feed (front lever)
Push & Pull tractor feed (front, rear)
Pull tractor feed (front, rear, bottom)
Feed speed
Normal mode: 1/6 inch feed : 45 msec
Continuous feed : 0.127 MPS (m/second)
5.0 IPS (inchs /second)
Copy mode: 1/6 inch feed : 66 msec
Continuous feed : 0.092 MPS (m/second)
3.6 IPS (inches/second)
Print Mode
Character
Pitch
Printable
Columns
Print Speed (cps)
Normal Copy
High-speed
draft
10 cpi 136 400 266
Draft
10 cpi 136 300 200
12 cpi 163 360 240
15 cpi 204 450 300
Draft
Condensed
17 cpi 233 257 171
20 cpi 272 300 200
LQ
10 cpi 136 100 66
12 cpi 163 120 80
15 cpi 204 150 100
LQ Condensed
17 cpi 233 171 114
20 cpi 272 200 133
Page 10
LQ-2080 Revision A
Product Description Hardware Specifications 10
Release lever: See the following table.
Table 1-4. Release Lever Settings
Paper thickness lever: See the following table.
Table 1-5. Adjust Lever Setting Position
Lever Position Paper path / Feeder Paper / Media
Friction
Manual insertion (front)
Cut sheet
(Single sheet & Multi part), Card
Manual insertion (rear)
Cut sheet (Single sheet & Multi part),
Card, Envelope
CSF Bin 1
Cut sheet (Single sheet & Multi part),
Card, Envelops
CSF Bin 2 Cut sheet (Single sheet)
Roll paper holder Roll paper
Front tractor
Push tractor feed (front)
Continuous paper (Single sheet & Multi
part), Continuous paper with labels
Push & Pull tractor feed
(front)
Continuous paper (Single sheet & Multi
part), Continuous paper with labels
Rear tractor
Push tractor feed (rear)
Continuous paper
(Single sheet & Multi part)
Push & Pull tractor feed
(rear)
Continuous paper
(Single sheet & Multi part)
Full release
Pull tractor feed (front)
Continuous paper (Single sheet & Multi
part), Continuous paper with labels
Pull tractor feed (rear)
Continuous paper
(Single sheet & Multi part)
Pull tractor feed
(bottom)
Continuous paper (Single sheet & Multi
part), Continuous paper with labels
Setting
Position
Paper Thickness (inch)
Paper Thickness (mm)
Minimum Maximum
0 0.0024 0.0047 over 0.06 up to 0.12
1 0.0047 0.0074 over 0.12 up to 0.19
2 0.0074 0.0102 over 0.19 up to 0.26
3 0.0102 0.0126 over 0.26 up to 0.32
4 0.0126 0.0141 over 0.32 up to 0.36
5 0.0141 0.0157 over 0.36 up to 0.40
6 0.0157 0.0173 over 0.40 up to 0.44
Page 11
LQ-2080 Revision A
Product Description Hardware Specifications 11
1.2.4 Paper Specifications
Cut Sheet (Single sheet, Multipart)
Card
1.2.5 Ribbon Specificatio
Ribbon life: Approximately 8 million characters
(LQ 10 cpi, 48 dots / character)
1.2.6 Electrical Specifications
120 V Version
Input voltage range: AC 99 to 132 V
Rated current: 1.0 A (max. 3.2 A)
Power consumption: Approximately 35 W
(ISO/IEC10561 Letter pattern)
Energy Star Compliant
230 V version
Rated current: 0.5 A (max. 1.6 A)
Power consumption: Approximately 37 W
(ISO/IEC10561 Letter pattern)
Energy Star Compliant
1.2.7 Environtal Conditions
See the LQ-2070 Service Manual.
1.2.8 Reliability
MVBF *: 19 million lines (except printhead)
MTBF: 10000 POH
Printhead life: 200 million strokes/wire
*: Mean print volume between failure
Front Entry Rear Entry
Width
<Minimum>
3.9 inch
100 mm
<Minimum>
3.9 inch
100 mm
Front Entry Rear Entry
Width
<Minimum>
3.9 inch
100 mm
<Maximum>
7.8 inch
200 mm
<Minimum>
3.9 inch
100 mm
<Maximum>
7.8 inch
200 mm
Length
<Minimum>
5.8 inch
148 mm
<Maximum>
7.8 inch
200 mm
<Minimum>
3.9 inch
100 mm
<Maximum>
7.8 inch
200 mm
Page 12
LQ-2080 Revision A
Product Description Hardware Specifications 12
1.2.9 Safety Approvals
120 V version
Safety standards: UL1950, CSA C22.2 No. 950
EMI: FCC part15 subpart B class B
CSA C108.8 class B
230 V version
Safety standards: EN60950 (TUV)
EMI: EN55022 (CISPR pub.22) class B
AS/NZS 3548 class B
1.2.10 CE Marking
230 V version
Low voltage directive 73/23/EEC:EN60950
EMC Directive 89/336/EEC: EN55022 class B
EN61000-3-2
EN61000-3-3
EN50082-1
IEC801-2
IEC801-3
IEC801-4
Acoustic noise: Approximately 50 db(A)
(ISO 7779 pattern)
1.2.11 Physical Specifications
Without options:
- Dimensions: 639 mm(W) x 402 mm(D) x 268 mm(H)
- Weight: Approximately 13 kg
Including CSF bin 1
- Dimensions: 639 mm(W) x 469 mm(D) x 380 mm(H)
- Weight: Approximately 16.3 kg
Including CSF bin 1 & bin 2
- Dimensions: 639 mm(W) x 598 mm(D) x 411 mm(H)
- Weight: Approximately 17.2 kg
Page 13
LQ-2080 Revision A
Product Description Firmware Specifications 13
1.3 Firmware Specifications
This section describes the firmware specifications for the LQ-2080.
1.3.1 Control Codes and Fonts
Control codes: ESC/P2 and IBM 2391 Plus Emulation
Character tables:
Standard version (13 character tables)
Italic table PC 860 (Portuguese)
PC 850 (Multilingual) PC 437 (US, Standard Europe)
PC 861 (Icelandic) PC 863 (Canadian-French)
PC 865 (Nordic) Abicomp
BRASCII Roman 8
ISO Latin 1 PC 858
ISO 8859-15
NLSP version (38 character tables)
Italic table PC437 (US, Standard Europe)
PC437 Greek PC850 (Multilingual)
PC852 (East Europe) PC853 (Turkish) PC855 (Cyrillic)
PC857 (Turkish) PC864 (Arabic) PC866 (Russian)
PC869(Greek) MAZOWIA (Poland)Code MJK (CSFR)
ISO 8859-7 (Latin/Greek) lSO Latin 1T (Turkish)
Bulgaria (Bulgarian) PC774 (LST 1283:1993)
Estonia (Estonia) ISO 8859-2 PC866 LAT. (Latvian)
PC866 UKR (Ukraina)PC860 (Portuguese)
PC861 (Icelandic) PC865 (Nordic) PC APTEC(Arabic)
PC708 (Arabic) PC720 (Arabic) PCAR864 (Arabic)
PC863 (Canadian-French) Abicomp
BRASCII Roman 8 ISO Latin 1
Hebrew7* Hebrew8* PC862 (Hebrew)*
PC 858 lSO 8859-15
* Not displayed in the Default setting mode.
International character set (14 countries and legal)
U.S.A. France Germany
U.K. Denmark 1 Sweden
Italy Spai n 1 Japan
Norway Denmark 2 Spain 2
Latin America Korea Legal
* The international and legal characters are these 12 codes:
23H, 24H, 40H, 5BH, 5CH, 5DH,
5EH, 60H, 7BH, 7CH, 7DH, 7EH
Typeface
Bit map fonts
EPSON Draft 10 CPI, 12 CPI, 15CPI
EPSON Roman 10 CPI, 12 CPI, 15CPI, Proportional
EPSON Sans Serif 10 CPI, 12 CPI, 15CPI, Proportional
EPSON Courier 10 CPI, 12 CPI, 15CPI
EPSON Prestige 10 CPI, 12 CPI
EPSON Script 10 CPI
EPSON OCR-B 10 CPI
EPSON Orator 10 CPI
EPSON Orator-S 10 CPI
EPSON Script C Proportional
Scalable fonts
EPSON Roman 10.5 pt., 8 pt., - 32 pt. (every 2 pt.)
EPSON Sans Serif 10.5 pt., 8 pt., - 32 pt. (every 2 pt.)
EPSON Roman T 10.5 pt., 8 pt., - 32 pt. (every 2 pt.)
EPSON Sans Serif H 10.5 pt., 8 pt., - 32 pt. (every 2 pt.)
Bar codes
EAN-13, EAN-8 Interleaved 2 of 5
UPC-A UPC-E Code 39
Code 128 POSTNET
Page 14
LQ-2080 Revision A
Product Description Firmware Specifications 14
Table 1-6. Character Tables and Available Typefaces
Character Tables Bit map font Scaleable font
Standard
version
Italic table*
1
PC 850 (Multilingual)*
1
PC 861 (Icelandic)*
1
PC 863(Canadian-French)*
1
Abicomp*
1
Roman 8
PC 858
PC 437 (US, Standard Europe)*
1
PC 860 (Portuguese)*
1
PC 865 (Nordic)*
1
BRASCII*
1
ISO Latin 1
ISO 8859-15
EPSON Draft
EPSON Roman
EPSON Sans Serif
EPSON Courier
EPSON Prestige
EPSON Script
EPSON OCR-B
EPSON Orator
EPSON Orator-S
EPSON Script C
EPSON Roman
EPSON Sans Serif
EPSON Roman T
EPSON Sans Serif H
NLSP
version
Italic table*
1
PC 850 (Multilingual)*
1
PC 861 (Icelandic)*
1
PC 865(Nordic)*
1
Abicomp*
1
lSOLatin1
ISO 8859-15
PC 437(US, Standard Europe)*
1
PC 860(Portuguese)*
1
PC863 (Canadian-French)*
1
BRASCIl*
1
Roman8
PC 858
PC 864 (Arabic)
EPSON Draft
EPSON Roman
(Not supported)
PC437Greek
PC 853 (Turkish)
PC 857 (Turkish)
PC 869 (Greek)
Code MJK (CSFR)
lSO Latin 1T (Turkish)
PC774 (LST 1283: 1993)
1SO 8859-2
PC 866 UKR (Ukraina)
PC 852 (East Europe)
PC 855 (Cyrillic)
PC 866 (Russian)
MAZOWIA (Poland)
lSO 8859-7 (Latin/Greek)
Bulgaria (Bulgarian)
Estonia (Estonia)
PC 866 LAT. (Latvian)
EPSON Draft
EPSON Roman
EPSON Sans Serif
EPSON Courier
EPSON Prestige
EPSON Script
(Not supported)
PC APTEC (Arabic)
PC 720 (Arabic)
PC 708 (Arabic)
PCAR864 (Arabic)
EPSON Draft (Arabic)
EPSON Roman
EPSON Sans Serif
(Not supported)
Hebrew7*
2
Hebrew 8*
2
PC862 (Hebrew)*
2
EPSON Draft (Hebrew)
EPSON Roman
EPSON Courier
(Not supported)
*1: ESC R command is effective on these character tables.
*2: Not displayed in the default setting mode.
Page 15
LQ-2080 Revision A
Product Description Firmware Specifications 15
1.3.2 Interface Specifications
This section only provides information which is specific to the LQ-2080.
For other information, refer to the LQ-2070 Service Manual.
1.3.2.1 Parallel Interface (Forward Channel)
Transmission mode: IEEE-1284 compatibility mode
Signal level: TTL compatible
(IEEE-1284 level 1 device)
Pin assignment: The pin assi gnment (forward channel) is
the same as for the LQ-2070 except for
the function of the pin below:
1.3.2.2 Parallel Interface (Reverse Channel)
Transmission mode: 8 bit parallel, IEEE-1284 nibble mode
Synchronization: Refer to the IEEE-1284 specification.
Handshaking: Refer to the IEEE-1284 specification.
Signal level: IEEE-1284 level 1 device
Data transmission timing: Refer to the IEEE-1284 specification.
Device ID:
Pin assignment: The pin assignment (reverse channel) is
the same as for the LQ-2070 except for
the functions of the pins below:
Pin No. Function
35 This line is pulled up to +5 V through 1.0 k Ω resistor.
[00H][4DH]
MFG: EPSON;
CMD: ESCPL2,PRPXL24,BDC;
MDL: LQ-2080;
CLS: PRINTER;
DES: EPSON[SP]LQ-2080;
Pin No. Function
18 This line is pulled up to +5 V through 3.9 k Ω resistor.
35 This line is pulled up to +5 V through 1.0 k Ω resistor.
Page 16
LQ-2080 Revision A
Product Description Operation Instruction 16
1.4 Operation Instruction
This section provides information on the LQ-2080 control panel buttons,
LED, and operations. Since the layout and functi ons of the control panel
are mostly common to those of LQ-2070, this section only provides the
information that is specific to LQ-2080. For othe r information, see LQ2070 Service Manual.
Operations at power on
Turning on the printer while pressing panel buttons executes the
functions shown in the following table.
Table 1-7. Operations at Power On
NOTE: Unlike the LQ-2070, the LQ-2080 doees not support the
quiet mode.
Table 1-8. Default Setting Menu
No.
Load / Eject
Function
1 Load / Eject LQ self test
2 LF / FF Draft self test
3 Condensed
Default setting (See the foll owing ta ble for
the setting menu.)
4 Load / Eject & LF / FF Data dump
5 Font & Tear Off / Bin EEPROM clear
6 Tear Off / Bin & Load / Eject
Clear EEPROM for Driving Line count for
ribbon change timing
7 Pause Bi-d adjustment
8 The others Not available.
Item Setting / Value
*1
*1: Setings with bold weight meas the standard factory settings.
Page length for front tractor
3 inch, 3.5 inch, 4 in ch , 5 . 5 inc h, 6 inc h, 7 inch, 8 inch,
8.5 inch,
11 inch
, 70/6 inch, 12 inch, 14 inch, 17 inch
Page length for rear tractor
Skip over perf oration On,
Off
Auto tear off On,
Off
Auto line feed On,
Off
Print direction Auto,
Bi-d.
, Uni-d.
I/F mode
Auto
, Parallel, Optional
Auto I/F wait time
10 sec.
, 30 sec.
Software
ESC-P2
, IBM 2391 Plus
Character table
Standard version / NLSP version: See Section 1.2 for
the character tables available.
PC437
International character set
for Italic table
Italic U.S.A.
, Italic France, Italic Germany, Italic U.K.,
Italic Denmark 1, Italic Sweden, Itali c Italy, Italic Spa in
1
0 slash On,
Off
High speed draft
On
, Off
Input buffer
On
, Off
Buzzer
On
, Off
Auto CR (IBM 2391 Plus) On,
Off
A. G. M. (IBM 2391 Plus) On,
Off
Font
*2
*2: One of the fonts selected in the default setting is corresponding to others
(=other font) on the control panel. Following fonts are not selected in the default
setting mode; Draft, Roman, Sans serif, Courier, Prestige, and Script
OCR-B, Orator, Orator-S, Script C,
Roman T
,
Sans serif H
Roll paper On,
Off
Page 17
LQ-2080 Revision A
Product Description Operation Instruction 17
Status code indicated by the LEDs
Table 1-9. Status Code Indicated by the LEDs
Buzzer
Paper out error: Beeper sounds (...) *
Release lever operation error: Beeper sounds (- - - - -)*
Illegal panel operation: Beeper sounds (.)*
* The description (.) and (-) shows how the beeper sounds.
(.): Beeper sounds approx.100 ms and interval is approx. 100 ms.
(-): Beeper sounds approx.500 ms and interval is approx. 100 ms.
1.4.1 Errors
Paper out:
When printer fails to feed a sheet, it goes paper out error
Release lever error:
When release lever position is wrong, it goes release lever error.
Fatal error:
Carriage control error and Power supply voltage error
Pause
Paper
Out
Tear Off /
Bin
Condensed Font
Pause On --- --- --- --Paper out error On On --- --- --Paper eject
warning
On Blink --- --- ---
Head hot warning Blink --- --- --- --Micro Adjust Blink --- --- --- --Tear off --- --- --- --- --Bin selection --- --- --- --- --Condensed
selection
--- --- --- --- ---
Font selection --- --- --- --- --Fatal error Blink Blink Blink Blink Blink
Page 18
LQ-2080 Revision A
Product Description Operation Instruction 18
1.4.2 EEPROM Initialization
Areas reset by EEPROM clear operation are as shown in the following
tables:
Table 1-10. Initialization Area for EEPROM (1/2)
Table 1-11. Initialization Area for EERPOM (2/2)
No. Item Factory setting
1 Character table selection PC437
2 Page length (rear tractor) 11 inch
3 Page length (front tractor) 11 inch
4 Page length (CSF Bin 1) 22 inch
5 Page length (CSF Bin 2) 22 inch
6 TOF adjustment value (rear tractor) 8.5 mm
7 TOF adjustment value (front tractor) 8.5 mm
8 TOF adjustment value (CSF Bin 1) 8.5 mm
9 TOF adjustment value (CSF Bin 2) 8.5 mm
10
TOF adjustment value
(rear manual insertion)
8.5 mm
11
TOF adjustment value
(front manual insertion)
8.5 mm
12 Bottom margin (rear tractor) 11 inch
13 Bottom margin (front tractor) 11 inch
14 Font selection Roman
15 Condensed Off
16 Print direction setting Bi-D
17 I/F mode selection Auto
18 Auto I/F wait time setting 10 sec
19 Auto line feed Off
20 Auto tear off Off
No. Item Factory setting
21 Skip over perforation Off
22 High speed draft On
23 Input buffer On
24 Software ESC/P2
25 0 slash Off
26 Buzzer On
27 Roll paper Off
28 Auto CR (IBM) Off
29 A. G. M. (IBM) Off
30 Tear-off adjustment value 0 clear
31 Other font selection Roman T
32 Bin select Friction Bin 1 or Tractor not Tear off
33 Manual insertion wait time 2 or 3 sec.
34 Tear-off wait time 3 sec.
35 Copy mode Off
36 Black paper mode Off
37 Paper width measure On
38 TOF minimum value 4.2 mm
39 I/F timing data BUSY
40 Paper edge length 0 clear
41 Page length (rear manual insertion) 22 inch
42 Page length (front manual insertion) 22 inch
Page 19
LQ-2080 Revision A
Product Description Main Components 19
1.5 Main Components
The main components for the LQ-2080 are as follows. They are
designed for easy disassembly and repair work.
C273 Main Board
C166 PSB/PSE Board
C165 PNL Board
Printer Mechanism
Housing (upper and lower cases)
Figure 1-1. Main Components for LQ-2080
Page 20
LQ-2080 Revision A
Product Description Main Components 20
1.5.1 C273 Main Board
Table 1-12. Relationship between Program ROM and CG
NOTE:"" represents the version information.
Figure 1-2. C273 Main Board
Destination
Program
ROM(IC10)
CG ROM(IC6) Comments
Standard 8 M bit TDD21 None
Standard Character is
stored in the Program
ROM.
Europe 8 M bit TDD25 None
Standard Character is
stored in the Program
ROM.
TAIWAN 4 M bit TDD27 32 M bit M320A19
A
Program ROM and CGROM are completely
independent.
Korea 4 M bit TDD30 8 M bit M80C00 A
Program ROM and CGROM are completely
independent.
China 4 M bit TDD29 16 M bit M160B11 A
Program ROM and CGROM are completely
independent.
H ead D rive
TRANSISTOR
CN2
IC 1 C P U
TM P 96C 141
IC 3
GATE ARRAY
E 05B 42
IC 10 P -RO M
IC 5
EEPRO M
IC 7 P -R O M (n o t m o u n te d
)
CN15
CN14
CN1
IC 6 (C G -R O M )
CN10
IC 12 A 2917
SLA7024M
CN8
CN9
CN13
CN12
CN16
CN7
CN17
CN3
CN4
CN5
CN6
CN11
IC 8 ( P S -R A M )
Page 21
OPERATING PRINCIPLES
Page 22
LQ-2080 Revision A
Operating Principles Printer Mechanism Operations 22
2.1 Printer Mechanism Operations
See the LQ-2070 Service Manual.
2.2 Power Supply Operation
See the LQ-2070 Service Manual.
Page 23
LQ-2080 Revision A
Operating Principles Control Circuit 23
2.3 Control Circuit
The control circuit consi sts of t he C273 Main Board assembl y and C165
PNL board This section describes the major components and explains
how the boards work.
IC 7 (not m ounted)
IC 6 (C G - R O M )*1
IC 8 (1 M P S -R A M )
C N 15(P N L board)
C N 1 (P a ra lle l I/F )
CN2 (Type B I/F)
C N 14 (O ption C SF)
CN17 (Fan)*2
CN6 (PE-Front)
IC 4 (TM P 96C )
CN5 (PE-Rear)
CN7 (Top)
CN4 (CRHP)
C N 16(R elease2)
C N 12(R elease1)
CN13(PG1)
IC 2(PS T 592)
IC 11(SLA 7024M )
CN11(CR)
IC 12(A2917)
CN10(PF)
CN3(from PS)
IC 3 (E05B 42)
CN8
Tr.(Q 4-25)
CN9
IC 5(AT93C 45)
Address
IC 1 0 (P -R O M )*1
Data
*1: R efer to the C hapter 1 / M ain C om ponent / T able "R elationship betw een the P rogram R O M and C G ".
*2 :
C N 17 on the m ain board is not used because power for driving the C ooling Fan is supplied
from the pow er supply board. Therefore, C N 17 is not used.
Figure 2-1. Control Circuit Block Diagram
2.3.1 Overview of Control Circuit Operation
The printer's control circuit includes a TMP96C041BF CPU
that runs at 19.66 MHz, an E05B24YB gate array, a 1M bit
PS-RAM (8-bit bus, less th an 100ns), a bit PROM (8-bit bus,
less than 100ns), CG (Standard Version) or CG (NLSP
Version). It oversees control of all th e components in the
printer. The following chart s hows you a bl ock diag ram of the
control circuit.
Page 24
LQ-2080 Revision A
Operating Principles Control Circuit 24
The following figure shows the data flow from the host computer to the
printhead. Data sent from the host comput er is conve rted t o i mage data
and transmitted to the printhead through the gate array.
Figure 2-2. Data Flow
The table below lists the each function of the main components of the
C273 Main Board.
Table 2-1. Functions of the Main Board
CPU
TM P 96C 041BF
G a te A r ra y
E05B24YB
Printhead drive
circuit
P rin t d a ta
conversion 1
P rin t d a ta
conversion 2
D a ta la tc h
a n d
data output
Im ag e data
transfer
Host
C om puter
P a ra lle l I/F
O p tio n I/F
RAM
In p u t
B u ffe r
Im age
B u ffe r
Line Edit
B u ffe r
IC Location Function
CPU IC 4
Receives data from the host computer and sends it
to the input buffer in RAM (under interrupt
processing control). Extends the input data held in
the buffer to create image data. Loads this image
data to the image buffer in RAM. Transfers the
image data to the printhead driver circuit.
Gate Array IC 3
Controls the functions below:
• Controls output data from the internal block
• Memory management
• Address latch of the address/data bus from the
CPU
• Clock control unit
• Bit manipulation
• Interface control
• Expanded parallel port
• Printhead control
• Motor control
EEPROM IC 5
An electrically writable and erasable ROM used to
hold information such as the TOF position and
bidirectional adjustment value.
ROM IC 10
The ROM contains the program that runs the CPU
and holds the character design (also called the
character generator).
RAM IC 8
The RAM contains the CPU working area and the
buffers.
CG IC 6
The CG contains the bitmap font s for each chara cter
table.
SLA7024M IC 11 Driver circuit for the CR motor.
A2917SEB IC 12 Driver circuit for the PF motor.
Page 25
LQ-2080 Revision A
Operating Principles Control Circuit 25
2.3.1 System Reset Circuit
Control circuits IC3 and IC4 are initialized when a /RESET signal (LOW
level) is output from por t 1 (VOUT) of I C2. I C2 moni tors t he +5 V l ine on
port 3, and resets under the following conditions:
1. When the power supply is turned on, a /RESET signal is output.
/RESET is canceled when the +5 V line goes up to 4.2 V, and then
100 ms passes.
2. When the +5 V line goes below +4.2 V, a /RESET signal is output.
/RESET is canceled when the +5 V line goes back up to 4.2 V and
then 100 ms passes.
Figure 2-3. Reset Circuit
Figure 2-4. Reset Signal Output Timing
VOUT
MRES
VCC
GND
+5V
+5V
R63
1K
IC 2
PS T5920
C36
0.1U
IC 4
IC 3
E05B 24Y A
TP M 96C 041A
F
23 R E S ET
74
RESET
1
2
3
4
1
2
3
4
5
VCC (+5V line)
VOUT (RESET)
RESET
RESET
Power O n
(v )
100m s
100m s
Page 26
LQ-2080 Revision A
Operating Principles Control Circuit 26
2.3.2 Printhead Driver Circuit
The standard voltage for the A/D converter i s made in ZD1 and input to
CPU port 78. Based on this standard voltage, the A/D converter in the
CPU operates. Port 74 monitors the +35 V line between R139 and R140
to determine the printhead driver pulse width. Usi ng the monitored
voltage, the CPU converts the voltage to a digital value and decides the
printhead driver pulse width, and then transports the data to the gate
array via CPU port 15. Based on the monitored voltage, the CPU
decides the printing interval . Port 73 monitors the pr inthead temperature
to protect the printhead. If the temperature exceeds 95
° C (213° F),
printing is stopped.
Figure 2-5. Printhead Drive Circuit
Gate
A rra y
C19
ZD1
+35V
7879
74
73
R 140
R 139
+35V
R 158
Address
D ata Line
Printhead D rive Signal
HD1 - HD24
Printhead D rive Transistor Q 1 - Q 24
C N 8 and C N 9 (P rinthead)
HTM P
+
C68
+35V
+35V
111
15
CPU
Page 27
LQ-2080 Revision A
Operating Principles Control Circuit 27
2.3.3 CR Motor Driver Circuit
The CR motor driver circuit is shown below.
Figure 2-6. CR Motor Driver Circuit
The carriage motor driver circuit controls the CR motor, using an
open-loop, constant drive arrangement. 2-2, 1-2, and W1-2 phases
excite the motor. A 2-2 phase step is equivalent to a 1-2 phase step
doubled. Ports 1, 8, 11, and 18 of the SLA7024M are used to change
the excitation phase, depending on the selected print mode. Table 2-2
in the following page describes the motor driver modes.
The SLA7024M (IC11) CR motor driver circuit detects and regulates the
amount of current flowing in the carriage motor coil . The curr ent flowing
through the coil varies, depending on the speed of the CR motor. The
CPU sets the amount of current and s ignals are sent via port s 32 to p ort
35. The SLA7024M sets the coil current, depending on the CR speed.
CPU(IC4)
PGO 0
PGO 1
PGO 2
PGO 3
1
2
3
4
6
5
17
16
/IN A
/IN -A
/IN B
/IN -B
A
-A
B
-B
SLA7024M (IC11)
CN11
CRA
CR-A
CRB
CR-B
8
1
11
18
1
2
3
4
RFA
RFB
3
14
GA(IC3)
CRRF A0
CRRF A1
CRRF A2
CRRF A3
1
2
3
4
R 122 - R125
R 116 - R119
CRRF B0
CRRF B1
CRRF B2
CRRF B3
1
2
3
4
Page 28
LQ-2080 Revision A
Operating Principles Control Circuit 28
Table 2-2. CR Motor Driver Modes
Speed Mode
Print Speed
(CPS)
Drive
Frequency
(PPS)
Excitation
Phase
Applications
4 400 4800 2-2 High speed draft
3 300 7200 1-2 Draft, Bit image
8/3 267 6400 1-2 High speed draft copy
2 200 4800 1-2
High speed draft power down, Draft copy,
Bit image copy, Bit image
3/2 150 3600 1-2
High speed draft power down, Draft power down,
Bit image power down, Bit image
1
(Normal)
100 4800 W1-2
Draft power down 2, Bit image power down,
LQ, Bit image, Raster graphics
1 (copy) 100 2400 1-2
High speed copy power down, Draft copy power
down, Bit image copy power down, Bit image copy
3/4 75 1800 1-2 Bit image power down, Bit image power down 2
2/3 67 1600 1-2
Bit image copy power down, LQ Copy, Raster
graphics copy
1/2 50 2400 W1-2
Bit image copy power down, Bit image copy power
down 2, LQ power down, Bit image power down,
Raster graphics power down
1/3 33 1600 W1-2
LQ copy power down, Bit image copy power down,
Raster graphics copy power down
1/4 25 1200 W1-2 Raster graphics, Raster graphics copy
1/6 17 800 W1-2
Raster graphics power down
Raster graphics copy power down
Page 29
LQ-2080 Revision A
Operating Principles Control Circuit 29
2.3.4 PF Motor Driver Circuit
The figure below shows the PF motor driver circuit.
Figure 2-7. PF Motor Driver Circuit
The PF driver current is controlled on the Gate Array and the signals are
output via port 123 (PFI0A), port 121 (PFI1A), port 120 (PFI0B), and
port 118 (PFI1B).
2.3.5 EEPROM Control Circuit
The EEPROM is nonvolatile memory that stores information even if the
printer power is off. The figure below shows the EEPROM control
circuit.
Figure 2-8. EEPROM Control Circuit
The EEPROM is controlled by CPU ports 9 (P70), 10 (P71), 11 (P72),
and 12 (P73). Port 11 is the data output line used to save the
information to the EEPROM, and port 12 is the data input line used to
read the saved data from the EEPROM. Port 70 is the chip select line,
and port 71 is the clock timing line. When the PWDN signal (power
down) is detected on port 20 (INTO), the CPU writes t he necessary data
to the EEPROM before the +5 V line drops to 4.75 V.
E05B 42(IC 3)
PFI0A
PFI1A
PFI0B
PFI1B
123
121
120
118
CN11
CRA
CR-A
CRB
CR-B
PHASE A
PHASE B
122
119
2
1
23
24
IN A
IN -A
IN B
IN -B
A
-A
B
-B
A 2917(IC 12)
43
26
6
3
18
21
PH1
PH2
/P F H O L D
124
44
25
VREF1
VREF2
1
3
2
4
CPU
P70
P71
P72
P73
CS
CK
DI
DO
EEPRO M
9
10
11
12
1
2
3
4
IC 5
Page 30
LQ-2080 Revision A
Operating Principles Control Circuit 30
2.3.6 Sensor Circuits
The CPU detects conditions of the following sensors: home position
(HP) sensor, release sensors 1 and 2, platen gap (PG) sensor, rear and
front paper end (PE) sensors, paper width (PW) sensor.
Figure 2-9. Sensor Circuit
Two types of sensors are used in this printer. Release sensors 1 and 2,
the PG sensors, and the front PE sensor are momentary switches.
The HP sensor, rear PE sensor, and PW sensor are photo diode
switches. The HP sensor detects CR home position when the photo
diode rays are cut off by the pr inthead. The rear PE sensor detects that
paper has been loaded when the photo diode rays are cut off by the
sensor plate, which is included in the rear PE sensor. The PW sensor,
used for paper width measurement and paper loading positioning,
detects the paper edge by comparing the measured voltage with
standard voltage, which was measured during the power on sequence.
Additionally, the +35 V line and head temperatures are monitored to set
the pulse length of the head driver signal.
CPU(IC4)
P36
P40
AN2
P53
PG Sensor
Release
Sensor 1
Release
Sensor 2
+5V
+5V
HP Sensor
+5V
+5V
Rear PE
Sensor
+5V
Front PE
Sensor
+5V
+5V
PW ,TOP
Sensor
76
75
68
70
GA(IC3)
Release1
Release2
116
117
61
P27
Page 31
DISASSEMBLY AND ASSEMBLY
Page 32
LQ-2080 Revision A
Disassembly and Assembly 32
See the LQ-2070 Service Manual.
Page 33
ADJUSTMENT
Page 34
LQ-2080 Revision A
Adjustment Overview 34
4.1 Overview
The adjustment items required for the LQ-2080 are the same as for the
LQ-2070. Therefore, see Table 4-1 i n the LQ-2170 Service Manual and
perform any necessary adjustment after disassembling/assembling the
printer.
4.1.1 Pre-operation for the Adjustment Program
1. Get a continuous paper. (136-column paper should b e used to avoi d
printing on the platen.)
2. Set the release lever to the continuous paper position.
3. Connect the printer and the PC and turn the printer on.
4. Press the Load/Eject button to send the paper to the stand-by
position. Then press the LF/FF button more than 10 times until the
leading edge of the paper is completely out of the printer.
NOTE: If you omit this operation, the printer will perform Uni-D
print instead of Bi-D.
5. Double-click “LQSERIES.EXE”. The program starts up and the
screen below appears.
Figure 4-1. LQSERIES.EXE Initial Screen
6. Move the cursor to “LQ-2080” and press the Enter key.
7. The following screen appears.
CAUTIO N
Though the conditions for each adjustment are the
same as for the LQ-2070, the adjustment program
used for the LQ-2080 is different. Therefore, observe
the instructions given in the following sections.
CAUTIO N
Do not use cut sheet for the Bi-D adjustment. Since
the Bi-D adjustment has to be performed with t he top
and bottom edges of the sheet firmly set in the paper
path, use of cut sheet will not provide accurate
adjustment.
Use single continuous paper.
Adjustment program for serial dot matrix printer
does not run without any paper loaded. So, be sure
to turn the printer on first and then load paper.
<*><*><*> E P SO N S ID M Printer S ervice Program bo ot process <*><*><*>
Please select th e m odel nam e.
LQ -2180
LQ -2580H
LQ -2080
FX-980
E S C :Q u it U P /D o w n : S e le c t E N T E R :D e te r m in e
Page 35
LQ-2080 Revision A
Adjustment Overview 35
Figure 4-2. Destination Selection Screen
8. Check the printer to be adjusted for the destination and press the
Enter key.
9. The following screen appears.
Figure 4-3. Main Menu Selection Screen
10. Select “Perform”. The following screen appears.
Figure 4-4. Main Menu Screen
CAUTIO N
Be sure to select a proper destination. If you select a
wrong destination, the printer may not print desirable
characters.
<*><*><*> E P SO N S ID M Printer S ervice Program bo ot process <*><*><*>
Select the destination.
EAI
EA I(Latin)
EAL
ESP
EHK
ETT
E S C :Q u it U P /D o w n :S e le c t E N T E R :D e te r m in e
ECC
P h ilip p in e
ESP(Thai)
EU L(M iddle East)
EUL
EUL Std.
EUL(Nordic)
EFS
EIB
EIS
EDG (NLSP)
EM O
CAUTIO N
Select “No” if you have input a wrong model name in
the screen shown in Figure 4-1.
If you select “Got”, the printer flashes the model
name stored in the RAM to the EEPROM once and
reads it again.
<*><*><*> EPSON SIDM Printer Service Program boot process <*><*><*>
D o you start the S ervice Pro gram ?
P e rfo rm (B o o t th is P R O G R A M )
N o (R e -s e le c t m o d e l n a m e )
G o t (C h e c k th is m o d e l n a m e )
E S C : Q u it U P /D o w n : S e le c t E N T E R : D e te r m in e
************** L Q -2 0 80 S E R V IC E P R O G R A M V ers io n 1 .1 **************
<><> SERVICE ITEM S <><>
1. Bi-D Adjustm ent
2. Print Data on EEPRO M
3. Set or reply S tarting date
4. TP E R eset
E S C : Q u it U P /D o w n :S e le c t E N T E R :D e t e r m in e
Page 36
LQ-2080 Revision A
Adjustment Overview 36
4.1.2 Bi-D Adjustment
This adjustment is made after the main board or the CR motor has been
replaced. The purpose of this adjustment is to electrically correct the
head wire’s point of impact during Bi-D printing. The adjusted val ue is
stored in the specific address i n the EEPROM. Once the v alue is stored,
it will not be erased if the printer is turned off or the EEPROM is reset.
1. Perform the pre-operation. (See Section 4.1.1.)
2. Select “1. Bi-D Adjustment”. The following screen appears.
Figure 4-5. Initial Menu of the Bi-D Adjustment
3. Press the Space key to check the current Bi-D setting condition for
the draft mode. The printer prints the following pattern.
Figure 4-6. Bi-D Pattern Sample
4. Output the patterns for the Draft Copy Mode and the LQ Mode, the
rest of the three modes in the screen (Figure 4-5). Then check that
the vertical lines in the middle row for each mode are aligned. (If no
adjustment is needed, you can turn the printer off, not cont inuing to
the next step.)
5. Examine the patterns for the three modes output in the previous
steps, and correct the value in the screen shown in Figure 4-5 until
the vertical lines for the center value (Data = 0 in Figure 4-6) are
aligned.
CAUTIO N
If the printer is in the emulation mode, characters
output for the Bi-D adjustment will be garbled. If so,
turn ESC/P2 on using the EEPROM Initialization mode.
************** L Q -2 0 8 0 S E R V IC E P R O G R A M V e rs io n 1 .1 **************
< B i-D a d ju s tm e n t >
D ra ft M o d e
Draft Copy M ode
LQ M ode
Previous
[ESC]
= 0
= 0
= 0
Print out
[SPACE]
Select speed
[U p /D o w n ]
A d just value
[L e ft/R ig h t]
W rite to EEPRO M
[E N T E R ]
CAUTIO N
The value “0” shown in the screen shown in Figure
4-5 is the initial value used in the program, which
varies from the one stored in the EEPROM. However,
if the main board has been replaced, the value in the
EEPROM is replaced with “0”as the initial value.
The printing pattern below is a sample for the high
speed mode. Be sure to perform the adjustment in
draft copy mode and LQ mode as well.
D r a ft m o d e B i-D d a ta = -1
D r a ft m o d e B i-D d a ta = -0
D r a ft m o d e B i-D d a ta = 1
Page 37
LQ-2080 Revision A
Adjustment Overview 37
6. When this adjustment is completed, if you need to perform another
adjustment using this program, you can continue without turni ng off
the printer.
4.1.3 TPE Level Reset
Make this adjustment when the main board or Top PE Sensor has been
replaced. Generally, light level emitted from the photo diode in a photo
sensor lowers with age. For this reason, the printer renews the current
paper remaining level by detecting the black level of the platen each
time the printer is turned on or paper is fed. When the TPE level is reset,
FF is written and it approaches 00 as the time goes by. If this operation
is not performed, paper out condition may be detected despite paper is
set.
1. Perform the pre-operation. (See Section 4.1.1.)
2. Select “TPE Reset” in the main menu screen (Figure 4-4) and press
the Enter key. The screen below appears.
Figure 4-7. Screen - TPE Reset
3. Select “Yes” and press the Enter key. FF is written in EEPROM
when the printer power is turned off.
************** L Q -2 0 8 0 S E R V IC E P R O G R A M V e rs io n 1 .1 **************
<R eset Top p aper an d detection level>
D o you w ant to reset Top paper-end detection level?
E S C :P r e v io u s U P /D o w n : S e le c t E N T E R :D e te r m in e
Yes
No
Page 38
LQ-2080 Revision A
Adjustment Overview 38
4.1.4 Writing the User-characteristic Data
Use this function to check the specific recor ds o f the printer used by
your customer. Also, you can renew the starting date using this
program. Since there is no standardized service operation using this
function, you can use it whenever necessary.
1. Perform the pre-operation. (See Section 4.1.1.)
2. Select “Set or Reply Starting Date” and press the Enter key. The
screen below appears.
Figure 4-8. Screen - Set or Reply Starting Date
[To check the current status]
3. Select “Characteristic Status Code” and press the Enter key. The
following screen appears.
Figure 4-9. Screen - Characteristic Status Code
[To renew the Starting Year / Month / Date]
4. Select “Set Starting year / month / date” and press the Enter key.
The following screen appears.
CAUTIO N
When using this function, the printer must be in the
normally operative condition. Make sure the printer is
free from any error conditions such as paper out, fatal
error, and so on. Otherwise, the function is not
effective.
************** LQ -2080 S E R VIC E PR O G R AM Version 1.1 **************
<*><*><*> S et or R eply Starting date <*><*><*>
E S C :Q u it U P /D o w n :S e le c t E N T E R : D e te r m in e
C haracteristic status code
Set starting year / m onth / date
ESC:Previous
C haracteristic status code
1 . S ta rtin g d a te -----> 9 9 / 1 1 1
2 . T o ta l p rin tin g lin e c o u n t(O d d c o u n te r) ---> 3577 lin e
3 . T o ta l p o w e r o n h o u r --->
4. Total printing line count for
rib b o n c h a n g e tim in g (T rip c o u n te r) ---> 3577 lines
Page 39
LQ-2080 Revision A
Adjustment Overview 39
Figure 4-10. Screen - Setting Starting Year / Month / Date
5. Input a 6-digit data. Be sure to input it correctly since this program
does not perform comparison check with the system timer. If you
input a wrong data, start from the beginning.
Setting S tarting Year/M onth/D ay
In p u t fo rm a t: 1 9 9 9 /1 /1 ---> 990101
P le a s e in p u t 6 d ig its > >
Page 40
TROUBLESHOOTING
Page 41
LQ-2080 Revision A
Troubleshooting Overview 41
5.1 Overview
This chapter contains information necessary for troubleshooting. Like
other chapters, this chapter do es not include the i nformation common t o
the LQ-2070.
5.2 Troubleshooting Information
This section gives you troubleshooting information to let you test points
for replaceable units.
5.2.1 Printhead
The information in this section is the same as f or the LQ- 2070 except for
the point below:
Point: Table 5-1 (LQ-2070 Service Manual)
5.2.2 Sensors
See the LQ-2070 Service Manual.
5.2.3 Motors
See the LQ-2070 Service Manual.
5.2.4 The Error codes with Indicators and Buzzer
Error codes indicated by the LEDs
Table 5-1. Error Code Indicated by the LEDs
Buzzer
Paper out error:Beeper sounds (...) *
Release lever operation error:Beeper sounds (- - - - -)*
Illegal panel operation:Beeper sounds (.)*
* The description (.) and (-) shows how the beeper sounds.
(.): Beeper sounds approx.100 ms and interval is approx. 100 ms.
(-): Beeper sounds approx.500 ms and interval is approx. 100 ms.
Meter Reading
<LQ-2070>
39.3 ± 10%
Ω
→
<LQ-2080>
29.6 ± 10%
Ω
Pause
Paper
Out
Tear Off /
Bin
Condensed Font
Paper out error On On --- --- --Paper eject
warning
On Blink --- --- ---
Head hot warning Blink --- -- - --- --Fatal error Blink Blink Blink Blink Blink
Page 42
LQ-2080 Revision A
Troubleshooting Unit Level Troubleshooting 42
5.3 Unit Level Troubleshooting
The information for this section is the same as for the LQ-2070 except
for the point below:
Point: Main board number
5.4 Repairing the C166 PSB/PSE Board
See LQ-2070 Service Manual.
5.5 Repairing the C273 Main Board
This section provides instructions to repair the C273 Main Board
assembly. It describes various problems, symptoms, likely causes, and
solutions. The checkpoint column provides proper waveforms,
resistance values, and other information for each component of C273
Main Board.
NOTE:This information is ne cessary only for servicers who repair t o
the component level. Servicers who repair to the unit level
(including all servicers in the U.S.) can ignore this section.
Table 5-2. Repairing the C272MAIN Board (1/3)
<LQ-2070> <LQ-2080>
C186 Main Board
→
C273 Main Board
Problem Cause Checkpoint Solution
The printer does
not operate at all.
Reset IC2 is
defective.
Check the voltage
waveforms of the VCC si gnal
(CH1: IC2 pin 3) and VOUT
signal (CH2: IC2 pin 1) when
power is turned on.
Replace IC2.
The PROM
(IC10) is not
selected.
Check for a change in the
signal from HIGH/LOW at pin
22 of IC10.
Replace IC10
(or replace the
main board).
The PSRAM
(IC8) is not
selected.
Check for a change in the
signal from HIGH/LOW at pin
22 of the IC.
Replace IC8 (or
replace the main
board).
Page 43
LQ-2080 Revision A
Troubleshooting Repairing the C273 Main Board 43
Table 5-3. Repairing the C272MAIN Board (2/3) Table 5-4. Repairing the C272MAIN Board (3/3)
Problem Cause Checkpoint Solution
The printer does
not operate at all.
CR1 is
defective.
Check the oscillator signal at
pins 26 or 27 of the CPU.
If the signal is
not correct,
replace IC4 (or
replace the main
board).
Otherwise,
replace CR1.
Carriage operation
is abnormal.
IC11 or IC4 is
defective.
• Check input signal
waveform (CH1) at pins 6,
5, 17, and 16 of IC11.
• Check outp ut sig nal
waveform (CH2) at pins 8,
1, 18, and 11 of IC11.
If the input
signal is not
correct, replace
IC4 (or replace
the main board).
If the output
signal is not
correct, replace
IC11.
IC4 is
defective.
Check the output signal at
pins 1 to 4 of IC4.
If there is no
output signal,
replace IC4 (or
replace the main
board).
Problem Cause Checkpoint Solution
Paper feed is
abnormal.
IC3 is defective
or IC12 is
defective.
• Check input signal waveform
at pin 8 of IC12.
• Check output sig nal wave form
at pins 1, 2, 23, and 24 of
IC12.
If the input
signal is not
correct, replace
IC1 or IC2 (or
replace the main
board). If the
input signal is
correct and the
output signal is
not correct,
replace the
IC11.
No data is
printed.
IC4 is
defective.
Check the output signal
waveform at pin 15 of IC4.
If this signal is
not output,
replace IC4 (or
replace the main
board).
A particular
dot fails to
print.
IC3 is
defective or
one of the head
drive
transistors is
defective (Q1 Q24).
• Check the voltage waveform
(CH1) at port HD1 - HD24 of
IC3.
• Check the voltage waveform
(CH2) for each transistor.
If the head drive
signal is not
output, replace
IC3 (or replace
the main board).
If the head drive
signal is output
from the head
drive transistors,
replace the head
drive transistor.
Page 44
LQ-2080 Revision A
Troubleshooting Repairing the Printer Mechanism 44
5.6 Repairing the Printer Mechanism
The information for this section is also the same as for the LQ-2070
except for the point below.
Point: Table 5-8 (LQ-2070 Service Manual)
<LQ-2070> <LQ-2080>
39.3
ohms
→
29.6
ohms
Page 45
MAINTENANCE
Page 46
LQ-2080 Revision A
Maintenance 46
See the LQ-2070 Service Manual.
Page 47
APPENDIX
Page 48
LQ-2080 Revision A
Appendix EEPROM Address Map 48
7.1 EEPROM Address Map
NOTE:The data of two or more bytes are assigned in such way as
lower byte to lower address, higher byte to higher address.
Table 7-1. EEPROM Address Map (1/7)
Table 7-2. EEPROM Address Map (2/7)
Address Data Data Format
Q-pit
data
Factory
setting
00H, 01H (reserved) 0000H 0000H
Area 1
02H, 03H Character
table
selection
0: PC437
1: PC850
2: PC860
3: PC863
4: PC865
5: PC861
6: BRASCII
7: Abicomp
8: ISO Latin 1
9: Roman 8
10:PC437 Greek
11:PC852
12:PC853
13:PC855
14:PC857
15:PC864
16:PC866
17:PC869
18:ISO Latin 1T
19:ISO 8859-7
20:MAZOWIA
21:Code MJK
22:Bulgaria
23:Estonia
24:PC774
25:ISO 8859-2
26:PC866 LAT
27:PC866 UKR
28:Hebrew 7
29:Hebrew 8
30:PC862
31:PCAPTEC
32:PC708
33:PC720
34:PCAR864
35:PC858
36:ISO 8859-15
0000H 0000H
(PC437)
37:Italic U.S.A.
38:Italic France
39:Italic Germany I
40:Italic U.K.
41:Italic Denmark
42:Italic Sweden
43:Italic Italy
44:Italic Spain
Address Data Data Format
Q-pit
data
Factory
setting
04H, 05H Page length for rear
tractor
1 to 22x360 (by 1/360 inch)
0000H: 11 inch (default)
0000H
(11 inch)
0000H
(11 inch)
06H, 07H Page length for fro nt
tractor
1 to 22x360 (by 1/360 inch)
0000H: 11 inch (default)
0000H
(11 inch)
0000H
(11 inch)
08H, 09H Page length for CSF
bin 1
1 to 22x360 (by 1/360 inch)
0000H: 22 inch (default)
0000H
(22 inch)
0000H
(22 inch)
0AH, 0BH Page length for CSF
bin 2
1 to 22x360 (by 1/360 inch)
0000H: 22 inch (default)
0000H
(22 inch)
0000H
(22 inch)
0CH, 0DH TOF adjustment
value for rear tractor
-60 to 360 (4.2 mm to 8.5
mm + 1 inch, by 1/360 inch)
0000H
(8.5 mm)
0000H
(8.5 mm)
0EH, 0FH TOF adjustment
value for front tractor
-60 to 360 (4.2 mm to 8.5
mm + 1 inch, by 1/360 inch)
0000H
(8.5 mm)
0000H
(8.5 mm)
10H, 11H TOF adjustment
value for CSF bin 1
-60 to 360 (4.2 mm to 8.5
mm + 1 inch, by 1/360 inch)
0000H
(8.5 mm)
0000H
(8.5 mm)
12H, 13H TOF adjustment
value for CSF bin 2
-60 to 360 (4.2 mm to 8.5
mm + 1 inch, by 1/360 inch)
0000H
(8.5 mm)
0000H
(8.5 mm)
14H, 15H TOF adjustment
value for rear manual
insertion
-60 to 360 (4.2 mm to 8.5
mm + 1 inch, by 1/360 inch)
0000H
(8.5 mm)
0000H
(8.5 mm)
16H, 17H TOF adjustment
value for front
manual insertion
-60 to 360 (4.2 mm to 8.5
mm + 1 inch, by 1/360 inch)
0000H
(8.5 mm)
0000H
(8.5 mm)
18H, 19H Bottom margin for
rear tractor
1 to 22x360 (by 1/360 inch),
0000H: 11inch (default)
0000H
(11 inch)
0000H
(11 inch)
1AH, 1BH Bottom margin for
front tractor
1 to 22x360 (by 1/360 inch),
0000H: 11inch (default)
0000H
(11 inch)
0000H
(11 inch)
1CH Font selection
0: Roman
1: Draft
2: Sans serif
3: Courier
4: Prestige
5: Script
6: Others
(default)
00H
(Roman)
00H
(Roman)
Page 49
LQ-2080 Revision A
Appendix EEPROM Address Map 49
Table 7-3. EEPROM Address Map (3/7) Table 7-4. EEPROM Address Map (4/7)
Address Data Data Format
Q-pit
data
Factory
setting
1DH Condensed 0: Off
1: On
00H
(Off)
00H
(Off)
1EH (reserved) 00H 00H
1FH Print direction
setting
0: Bi-d.
1: Uni-d.
2: Auto
00H
(Bi-d.)
00H
(Bi-d.)
20H I/F mode selection
0: Auto I/F selection
1: Parallel I/F
2: Type-B I/F
00H
(Auto)
00H
(Auto)
21H Auto I/F wait time
setting
10:10 sec.
30:30 sec.
00:10 sec. (default)
0AH
(10 sec.)
0AH
(10 sec.)
22H Auto line feed
Auto tear off
Skip over
perforations
High speed draf t
Input buffer
---
---
---
b0:Auto line feed
0: Off, 1: On
b1:Auto tear off
0: Off, 1: On
b2:Skip over perforation
0: Off, 1: On
b3:High speed draft
0: On, 1: Off
b4:Input buffer
0: On, 1: Off
b5:(reserved)
b6:(reserved)
b7:(reserved)
00H 00H
Address Data Data Format
Q-pit
data
Factory
setting
23H Software
0 slash
Buzzer
Roll paper
Auto CR
A. G. M.
---
---
b0:Software
0: ESC/P2,
1: IBM 2391 Plus
b1:0 slash,
0: Off, 1: On
b2:Buzzer
0: On, 1: Off
b3:Roll paper
0: Off, 1: On
b4:Auto CR (IBM)
0: Off, 1: On
b5:A. G. M. (IBM)
0: Off, 1: On
b6:(reserved)
b7:(reserved)
00H 00H
24H,
25H
Tear-off
adjustment value
-128 to +127 (by 1/360 inch) 0000H 0000H
26H Other font
selection
0: Roman T
1: Sans Serif H
2: OCR-B
3: Orator
4: Orator-S
5: Script C
00H 00H
27H Backup flags 1
Copy mode
00H 00H
28H Backup flags 2
In tear-off state
Bin select
0: Friction Bin 1 or Tractor not
Tear off
1: Friction Bin 1
2: Friction Bin 2
3: Friction Card
4: Tractor & Tear off
00H 00H
Page 50
LQ-2080 Revision A
Appendix EEPROM Address Map 50
Table 7-5. EEPROM Address Map (5/7) Table 7-6. EEPROM Address Map (6/7)
Address Data Data Format
Q-pit
data
Factory
setting
29H Panel mask
pattern 1
b0:LOAD function
b1:EJECT function
b2:FONT selection
b3: CONDENSED selection
b4:TEAR OFF function
b5:BIN selection
b6:Draft self test
b7: LQ self test
00H 00H
2AH Panel mask
pattern 2
b0:LF function
b1:FF function
b2:Micro Adjust function
b3:Pause function
b4:Data dump
b5:Default setting
b6:Bi-d. adjustment
b7:(reserved)
00H 00H
2BH Manual insertion
wait time
3 to 30 (by 0.1 sec.), 00H: 2 sec
when Normal mode. (same as 3
sec when copy mode. default)
00H
(2or3 sec.)
00H
(2or3 sec.)
2CH Tear-off wait time 3 to 30 (by 0.1 sec.), 00H: 3 sec.
(default)
00H
(3 sec.)
00H
(3 sec.)
2DH to
2EH
(reserved) 00H 00H
2FH Copy mode
0: Off 1: On
00H 00H
30H-33H Driving line count
for ribbon change
timing
0 - 0FFFFFFFFH (count) 000000
00H
000000
00H
34H-37H Driving Hour 0 - 0FFFFFFFFH (minutes) 000000
00H
000000
00H
38H3BH
Driving Line Count 0 - 0FFFFFFFFH (count) 000000
00H
000000
00H
Address Data Data Format
Q-pit
data
Factory
setting
3CH Starting Year 0 - 99 (the last two figures of
Anno Domini)
00H 00H
3DH Starting Month 1 - 12 00H 00H
3EH Starting Date 1 - 31 00H 00H
3FH Black paper mode
paper width
measure
b0:black paper mode
0: Off, 1: On
b1:paper width measure
0: On, 1: Off
b2 to b7: (reserved)
00H 00H
40H to
41H
TOF Minimum
value
-120 to -60, 0: -60 (4.2 mm)
In case it is bigger than -60, the
value is considered -60.
00H 00H
42H I/F timing data bit0-3: BUSY timing data
bit4-7: XAACK timing data
00H 00H
43H
(complement of 42H)
FFH FFH
44H to
5DH
(reserved) 00H 00H
5EH,
5FH
Paper edge length 0000H 0000H
60H,
61H
Page length for
rear manual
insertion
1 to 22x360 (by 1/360 inch),
0000H: 22 inch (default)
0000H
(22 inch)
0000H
(22 inch)
62H,
63H
Page length for
front manual
insertion
1 to 22x360 (by 1/360 inch),
0000H: 22 inch (default)
0000H
(22 inch)
0000H
(22 inch)
64H to
66H
Sub-number for
customization
00H to 09H
000000H
(Standard)
000000H
(Standard)
67H (reserved)
00H 00H
Page 51
LQ-2080 Revision A
Appendix Connector Summary 51
Table 7-7. EEPROM Address Map (7/7)
*a) These data are fixed by each printer hardware in the factory. They
should not be changed afterwards.
7.2 Connector Summary
The information in this section is common to the LQ-2070 Service
Manual except for the point below:
Point: Figure A-1 (LQ-2070 Service Manual)
Address Data Data Format
Q-pit
data
Factory
setting
Area 2
68H Market
0: Standard version
1: NLSP version
00H 00H
69H IBM character table
0: Table2
1: Table1
00H 00H
70H (reserved) 00H 00H
71H Check sum of Area 2 00H 00H
Area 3
72H Vp adjustment value 80H *a)
73H Vp adjustment value
(complement of 72H)
7FH *a)
74H Bi-d adjustment value for high
speed draft / draft mode
-12 to +12
(by 1/720 inch)
00H *a)
75H Bi-d adjustment value for draft
copy mode
-12 to +12
(by 1/720 inch)
00H *a)
76H Bi-d adjustment value for LQ
mode
-12 to +12
(by 1/720 inch)
00H *a)
77H (reserved) 00H 00H
78H TPE level FFH FFH
79H TPE adjustment position -10 to +10
(by 1/180 inch)
00H 00H
7AH to
7FH
(reserved) 00H 00H
<LQ-2070> <LQ-2080>
C186 Main Board
→
C273 Main Board
Page 52
LQ-2080 Revision A
Appendix Component Layout 52
7.3 Component Layout
Figure 7-1. C273 Main Board Component Layout - Component Side
Page 53
LQ-2080 Revision A
Appendix Component Layout 53
Figure 7-2. C273 Main Board Component Layout - Soldering Side
Page 54
LQ-2080 Revision A
Appendix Circuit Diagram 54
7.4 Circuit Diagram
See the following page for the circuit diagram for the C273 Main Board.
Page 55
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