Epson LQ 670 User Manual

EPSON

IMPACT DOT MATRIX PRINTER

SERVICE MANUAL

EPSON LQ-670

SEIKO EPSON CORPORATION

4007875

NOTICE

without SEIKO EPSON’s express written permission is forbidden.

The contents of this manual are subjects to change without notice. All efforts have been made to ensure the accuracy of the contents of this manual.

However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.

The above notwithstanding SEIKO EPSON can assume no responsibility f or any errors

in this manual or the consequences thereof.

EPSON is a registered trademark of SEIKO EPSON CORPORATION.

General Notice:

Other product names used herein are for identification purposes only and may be trademarks or registered trademarks of their respective companies.

PRECAUTIONS

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

WARNING

CAUTION

The precautionary measures itemized below should always be observed when performing repair/maintenance procedures.

Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures preceded by WARNING Headings. Signals a precaution which, if ignored, could result in damage to equipment.

WARNING

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

2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK.

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 CO NNECTED, USE EXT REME CAUT ION IN W O RKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.

CAUTION

1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED O NLY BY EPSON CERTIFIED REPAIR TECHNICIAN.

2. MAKE CERTAIN THAT T HE SOURCE VOLT AGE IS THE SAME AS T HE RATED VOLT AGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.

3. ALWAYS VERIFY THAT T HE EPSON PRODUCT HAS BEEN DISCONNECT ED 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 ANTI-STATIC 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.

iii

PREFACE

This manual descr ibes functions , theory of electrical and m echanical operations , maintenanc e, and repair of EPSON LQ-670. The instructions and procedur es included herein are intended for the experience r epair technician, and attention should be given to die precautions on the preceding page. The Chapters are organized as follows:

CHAPTER 1. GENERAL DESCRIPTION

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

CHAPTER 2. OPERATING PRINCIPLES

Describes the theory of printer operation.

CHAPTER 3. DISASSEMBLY AND ASSEMBLY

Includes a step-by-step guide for product disassembly and assembly.

CHAPTER 4. ADJUSTMENT

Includes a step-by-step guide for adjustment.

CHAPTER 5. TROUBLESHOOTING

Provides EPSON-approved techniques for troubleshooting.

CHAPTER 6. MAINTENANCE

Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.

APPENDIX

Describes connector pin assignments, circuit diagrams, circuit board component layout and exploded diagram.

The contents of this manual are subject to change without notice.

REVISION SHEET

Revision Issued Data Contents

Rev. A May 28, 1997 First issue

CHAPTER 1. GENERAL DESCRIPTION CHAPTER 2. OPERATING PRINCIPLES CHAPTER 3. DISASSEMBLY AND ASSEMBLY CHAPTER 4. ADJUSTMENT CHAPTER 5. TROUBLESHOOTING CHAPTER 6. MAINTENANCE APPENDIX

Chapter 1

Product Descriptions

1.1 Specifications.......................................................................................................1-1

1.1.1 Features................................................................................................................................... 1-1

1.2 Hardware Specifications......................................................................................1-3

1.2.1 Printing Method ...................................................................................................................... 1-3

1.2.2 Printing Specifications........................................................................................................... 1-4

1.2.3 Paper Handling Specifications.............................................................................................. 1-5

1.2.4 Paper Specification ................................................................................................................ 1-6

1.2.5 Printable Area ....................................................................................................................... 1-10

1.2.6 Ribbon Cartridge .................................................................................................................. 1-14

1.2.7 Input data buffer................................................................................................................... 1-14

1.2.8 Electrical Specification ........................................................................................................ 1-14

1.2.9 Reliability............................................................................................................................... 1-14

1.2.10 Environmental Condition................................................................................................... 1-15

1.2.11 Safety Approvals................................................................................................................. 1-15

1.2.12 CE Marking.......................................................................................................................... 1-15

1.2.13 Acoustic Noise.................................................................................................................... 1-15

1.3 Firmware Specification ......................................................................................1-16

1.3.1 Control Codes and Fonts..................................................................................................... 1-16

1.3.2 Interface Specification ......................................................................................................... 1-18

1.3.2.1 Parallel interface (Forward channel) .......................................................................1-18

1.3.2.2 Parallel Interface (Reverse channel).......................................................................1-20

1.3.2.3 Optional Interface....................................................................................................1-21

1.3.2.4 Interface Selection................................................................................................... 1-21

1.3.2.5 Manual selection...................................................................................................... 1-21

1.3.2.6 Automatic selection .................................................................................................1-21

1.3.2.7 Interface state and interface selection.....................................................................1-21

1.3.3 Prevention Hosts from Data Transfer Timeout.................................................................. 1-21

1.4 Operation.............................................................................................................1-22

1.4.1 Control Panel ........................................................................................................................ 1-22

1.4.1.1 Usual Operation ...................................................................................................... 1-22

1.4.1.2 Switches.................................................................................................................. 1-24

1.4.1.3 Indicators(LED) ....................................................................................................... 1-25

1.4.1.4 Buzzer .....................................................................................................................1-26

1.4.2 Default Setting ...................................................................................................................... 1-27

1.4.3 Bi-d Adjustment.................................................................................................................... 1-28

1.4.4 Initialization........................................................................................................................... 1-29

1.4.5 Errors..................................................................................................................................... 1-29

1.5 Main Components...............................................................................................1-30

1.5.1 C214 Main Board .................................................................................................................. 1-30

1.5.2 C214PSB Board .................................................................................................................... 1-30

1.5.3 C214 PNL Board.................................................................................................................... 1-31

1.5.4 Printer Mechanism ............................................................................................................... 1-31

1.5.5 Housing ................................................................................................................................. 1-31

Chapter 1 Product Description

1.1 Specifications

This specifications provide characteristics of the serial impact dot matrix printer LQ-670.

1.1.1 Features

LQ-670 is a 24pin serial impact dot matrix printer for the VAR(value added reseller) market. The major features of this printer are;

Columns :106 columns (10cpi) Printing Speed :High speed draft 300cps

:Draft 250cps :LQ 83cps at 10cpi

Feeding Method :Friction feed (front manual, rear CSF)

:Push tractor feed (rear)

Feeder :Rear push tractor

CSF Bin1/Bin2 (Option) Roll paper holder (Option)

Paper/Media :Single sheet, Continuous paper, Multi part paper, Envelope, Card,

Label and Roll paper.

Fonts :9LQ & 1 Draft Bitmap and 4 Scarable typefaces

:8 Bar code fonts

Character tables :Standard version 11 tables

NLSP version 20 tables

Input buffer :64 Kbytes Acoustic noise :55dB(A) (ISO7779 pattern) Reliability :Total print volume 6.5 million lines(except print head)

:(MTBF) 5000 POH :Print head life 200 million strokes/wire :Ribbon life 2 million characters

Interface :Bi-directional parallel interface (IEEE-1284 nibble mode supported)

Type B/I/F level 2 (Option)

Control code :ESC/P 2 and IBM 2390 Plus emulation Copy capability :1 original + 4 copies Control panel functions :Font, Condensed, Pause, Tear off, Bin, LF/FF, Load/Eject, Micro Adjust

and the default settings

Printable area :70 lines are available at A4.

(Top margin 0 mm setting and Bottom margin 0 mm setting are available)

Control Panel

Edge Guide

Stacker

Paper Guide

Ribbon Cartridge

Power Switch

Push Tractor

I/F Connector

Printer Cover

Print Head

Adjust Lever

Release lever

Paper Feed Knob

Figure 1-1. Exterior of LQ-670

Rev. A

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LQ-670 Service Manual

Consumables and optional units

Table 1-1. Consumables and Optional Units

Name Part Number

Ribbon cartridge S015016 High capacity cut sheet feeder (Bin1) C806781 (EAI version) High capacity cut sheet feeder (Bin1) C806782 (Non-EAI version) Second bin cut sheet feeder (Bin2) C806791 (EAI version) Second bin cut sheet feeder (Bin2) C806792 (Non-EAI version) Roll paper holder #8310 Serial I/F card C82305* / C82306* 32KB intelligent serial I/F card C82307* / C82308* 32KB intelligent parallel I/F card C82310* / C82311* Local Talk I/F card C82312* 32KB IEEE-488 I/F card C82313* Coax I/F card C82314* Twinax I/F card C82315* Ethernet I/F card C82331* IEEE-1284 parallel I/F card C82345* Multi Protocol Ethernet I/F card C82346*

Note*)

: The number represented by an asterisk varies, depending on the country.

Rev. A

1.2 Hardware Specifications

This section describes hardware specification for the LQ-670.

1.2.1 Printing Method

Printing Method : Impact dot matrix Number of pins : 24 pins Print pin arrangement : 12x2 staggered Print pin diameter : 0.0079 inch (0.20 mm) Color : Black Print direction : Bi-direction with logic seeking

Chapter 1 Product Description

Head Center

Figure 1-2. Pin Configuration

Rev. A

LQ-670 Service Manual

1.2.2 Printing Specifications

Copy capability :1 original + 4 copies Print speed and printable columns

Table 1-2. Print Speed and Printable Columns

Printing Mode Character Pitch Printable Columns Print Speed(cps)

Normal Copy

High speed Draft 10cpi 106 300 200 Draft 10cpi 106 250 167

12cpi 127 300 200 15cpi 159 375 250

Draft condensed 17cpi 181 214 143

20cpi 212 250 167

LQ 10cpi 106 83 70

12cpi 127 100 83 15cpi 159 125 104

LQ condensed 17cpi 181 143 119

20cpi 212 167 139

Note) Note)

When the power supply voltage drops to the lower limit, the printer stops printing and then starts printing the rest of that line again but at the slower speed than before. When the head temperature rises to the upper limit, the printer stops printing. When the head temperature falls to the normal level, the printer starts printing again but slower than before.

Resolution

Table 1-3. Resolution

Printing Mode Horizontal density Vertical density Adjacent dot print

High speed draft 90dpi 180dpi No Draft 120dpi 180dpi No Draft condensed 240dpi 180dpi No LQ 360dpi 180dpi N0 8 pins bit image 60, 80, 90 or 120dpi 60dpi Yes

120 or 240dpi 60dpi No

24 pins bit image 60,90,120 or 180dpi 180dpi Yes

360dpi 180dpi No

Raster graphics 180 or 360dpi 180 or 360dpi Yes

Control code : ESC/P 2 and IBM 2390 Plus emulation (Refer to control code)

Rev. A

Chapter 1 Product Description

1.2.3 Paper Handling Specifications

Feeding method :Friction feed (front manual, rear CSF)

Push tractor feed (rear)

Feeder :Rear push tractor

CSF Bin1/Bin2 (Option) Roll paper holder(Option)

Paper path :Manual Insertion Front in, front out

CSF Rear in, front out

 Tractor Rear in, front out Line Spacing :1/6 inch or programmable in increments of 1/360 inch Feed speed :Refer to the table 1-4. Release Lever :The release lever must be set according to the table 1-5. Paper thickness lever :The paper thickness lever must be set at the proper position according to the

table 1-6.

Table 1-4. Feeding Speed

Normal mode Copy mode

1/6 inch feed 60 msec 70 msec Continuous feed 0.127MPS(m/sec)

5.0 IPS(inches/sec)

Table 1-5. Release Lever Position

Lever Position Paper path/Feeder Paper/Media

Friction Manual insertion(front) Cut sheet(Single sheet& Muti part)

Card

CSF Bin1 Cut sheet(Single sheet & Multi part)

Envelope, Card CSF Bin2 Cut sheet(Single sheet) Roller paper holder Roll paper

Tractor Push tractor feed(rear) Continuous paper(Single sheet & Multi

part)

Table 1-6. Paper Thickness Lever Position

Lever Position Paper thickness (inch) Paper thickness (mm)

Minimum Maximum Minimum Maximum

0 0.0024 0.0047 0.065 0.12 1 0.0047 0.0075 0.12 0.19 2 0.0075 0.0102 0.19 0.26 3 0.0102 0.0126 0.26 0.32 4 0.0126 0.0142 0.32 0.36 5 0.0142 0.0157 0.36 0.40 6 0.0157 0.0205 0.40 0.52

0.092 MPS(m/sec)

3.6 IPS(inches/sec)

Rev. A

LQ-670 Service Manual

1.2.4 Paper Specification

This section describes printable area and types of paper that can be used in this printer. Cut Sheets

The following table shows specification for cut sheets.

Table 1-7. Cut Sheet (Single sheet, Not Multi Part)

Front Entry(Manual Insertion) Rear Entry(CSF bin1) Rear Entry(CSF bin2)

Minimum Maximum Minimum Maximum Minimum Maximum

Width (inch) 3.6 11.7 3.9 11.7 3.9 11.7

(mm) 91 297 100 297 100 297

Length (inch) 3.5 16.5 3.6 16.5 8.3 16.5

(mm) 90 420 92 420 210 420

Thickness(inch) 0.0025 0.0055 0.0025 0.0055 0.0025 0.0055

(mm) 0.065 0.14 0.065 0.14 0.065 0.14

Weight (g/m2)529052905290

(lb) 14 24 14 24 14 24

Quality Plain paper, Reclaimed paper, Not curled, not folded, not crumpled.

Note):

Printing on reclaimed paper is available only under the normal temperature and humidity condition.

Table 1-8. Cut Sheet (Multi Part)

Front Entry (Manual Insertion) Rear Entry (CSF)

Minimum Maximum Minimum Maximum

Width (inch) 3.6 11.7 3.9 11.7

(mm) 91 297 100 297

Length (inch) 3.5 16.5(11.7) 3.6 16.5

(mm) 90 420(297)

( ):Value of line

glue one side of

form.

Copies 1 original + 4 copies 1 original + 4 copies Total thickness (inch) 0.0047 0.015 0.0047 0.015

(mm) 0.12 0.39 0.12 0.39 Weight (g/m2)40 58 40 58 (one sheet of multi part) (lb) 12 15 12 15 Quality Plain paper, Reclaimed paper

Not curled, not folded, not crumpled

Jointing Line glue at the top or one side of

form

Note):

Printing on multi part. Don’t use CSF 2nd bin.

Plain paper, Reclaimed paper Not curled, not folded, not crumpled Line glue at the top of form

92 420

Rev. A

Chapter 1 Product Description

Envelope

Table 1-9. Envelope Specification

Front Entry (Manual Insertion) Rear Entry (CSF)

Minimum Maximum Minimum Maximum

Envelope Width (inch) 6.5 6.5 (No.6) (mm) 165 165

Length (inch) 3.6 3.6

(mm) 92 92 Envelope Width (inch) 9.5 9.5 (No.10) (mm) 241 241

Length (inch) 4.1 4.1

(mm) 105 105 Total thickness (inch) 0.0063 0.0197 0.0063 0.0197

(mm) 0.16 0.52 0.16 0.52

The difference of thickness at the printable area is within 0.0098 inch (0.25mm)

Weight (g/m2)45 91 45 91

(lb) 12 24 12 24

Quality BOND paper, PLANE paper or AIR

MAIL. No glue at a flap, Not curled, not folded, not crumpled

The difference of thickness at the printable area is within 0.0098 inch (0.25mm)

BOND paper, PLANE paper or AIR MAIL. No glue at a flap, Not curled, not folded, not crumpled

Note1)

: Printing on envelope is available only under normal temperature and humidity conditions.

Note2): Note3):

Card

Width (inch) 4.1 5.8 4.1 5.8 Length (inch) 4.1 5.83 4.1 5.8 Thickness (inch) 0.0087 0.0087 Weight (g/m2) 192 192 Quality Plain paper, Reclaimed paper

Note1) Note2):

Set the longer side of envelope horizontally. Don’t use CSF 2nd bin.

Table 1-10. Card Specification

Front Entry (Manual Insertion) Rear Entry(CSF)

Minimum Maximum Minimum Maximum

(mm) 105 148 105 148 (mm) 105 148 105 148 (mm) 0.22 0.22 (lb) 51 51

Plain paper, Reclaimed paper

Not curled, not folded, not crumpled

: Printing card is available only under normal temperature and humidity conditions.

Don’t use CSF 2nd bin.

Not curled, not folded, not crumpled

Rev. A

LQ-670 Service Manual

Continuous paper (Single sheet and Multi part)

Table 1-11. Continuous Paper (Single Sheet and Multi Part)

Rear Entry (Tractor)

Minimum Maximum

Width (inch) 4 12

(mm) 101.6 304.8

Length(one page) (inch) 4 22

(mm) 101.6 558.8 Copies 1 original + 4 copies Total thickness (inch) 0.0025 0.015

(mm) 0.065 0.39 Weight (g/m2)52 82 (not multi part) (lb) 14 22 Weight (g/m2)40 58 (one sheet of multi part) (lb) 12 15 Quality Plain paper, Reclaimed paper

Carbonless multi part paper

Jointing Point glue or paper staple(both side)

Continuous paper with Labels

Table 1-12. Continuous Paper with Labels

Rear Entry (Tractor)

Minimum Maximum

Label size See the figure below. Base sheet width (inch) 4 12

(mm) 101.6 304.8 Base sheet length (inch) 4 22 (one page) (mm) 101.6 558.8 Base sheet (inch) 0.0028 0.0035 Thickness (mm) 0.07 0.09 Total thickness (inch) 0.0063 0.0075

0.16 0.19

Label weight (g/m2)68

(lb) 17

Quality A VERY CONTINUOUS FORM LABELS, A VERY MINI-LINE

LABELS or the same quality labels

Note)

: Printing on label is available only under the normal temperature and humidity conditions.

Note):

The base sheet of labels must be continuous paper.

2.5 inch (63.5mm) min.

15/16 inch (23.8mm) min.

Label

R 0.1 inch(2.5mm) min.

Figure 1-3. Label Size

Rev. A

Chapter 1 Product Description

Roll paper

Table 1-13. Roll Paper Specification

Rear Entry (Roll paper holder)

Minimum Maximum

Width (inch) 8.5

(mm) 216

Length (inch) -----

(mm)

Thickness (inch) 0.0028 0.0035

(mm) 0.07 0.09

Weight (g/m2)52 82

(lb) 14 22

Quality Plain paper, Reclaimed paper. Not curled, not folded, not

crumpled.

Rev. A

LQ-670 Service Manual

1.2.5 Printable Area

Cut sheets

Printable Area

Figure 1-4. Printable Area for Cut Sheet

Table 1-14. Printable Area for Cut Sheet

Single sheet Multi part

PW (Width) (Refer to section 1.2.4) (Refer to section 1.2.4) PL (Length) (Refer to section 1.2.4) (Refer to section 1.2.4) LM (Left margin) RM (Right margin) TM (Top margin) 0.0mm or more 0.0mm or more BM (Bottom margi n) 0.0mm or more 0. 0mm or more

3 mm or more(PW<=297mm) 3 mm or more(PW<=297mm) 3 mm or more(PW<=297mm) 3 mm or more(PW<=297mm)

1-1

Rev. A

Envelope and card

Chapter 1 Product Description

Printable Area

Figure 1-5. Printable Area for Envelope

Printable Area

Figure 1-6. Printable Area for Card

Table 1-15. Printable Area for Envelope and Card

Envelope Card

PW (Width) (Refer to section 1.2.4) (Refer to section 1.2.4) PL (Length) (Refer to section 1.2.4) (Refer to section 1.2.4) LM (Left margin) 3 mm or more 3 mm or more RM (Right margin) 3 mm or more 3 mm or more TM (Top margin) 0.0mm or more *1 0.0mm or more *1 BM (Bottom margi n) 0.0mm or more 0.0mm or more

Note *1)

: When loading the paper from CSF, TM(Top margin) is 4.2 mm or more.

Rev. A

1-1 1

LQ-670 Service Manual

Continuous paper

Perforation

Printable Area

Perforation

Figure 1-7. Printable Area for Continuous Paper

Table 1-16. Printable Area for Continuous Paper

Continuous paper

PW (Width) (Refer to section 1.2.4) PL (Length) (Refer to section 1.2.4) LM (Left margin) 13mm or more RM (Right margin) 13mm or more TM (Top margin) 4.2mm or more BM (Bottom margi n) 4.2mm or more

1-1

Rev. A

Roll paper

Chapter 1 Product Description

Printable Area

Figure 1-8. Printable Area for Roll Paper

Table 1-17. Printable Area for Roll Paper

Continuous paper

PW (Width) (Refer to section 1.2.4) PL (Length) (Refer to section1.2.4) LM (Left margin) 3mm or more RM (Right margin) 3mm or more TM (Top margin) 0.0mm or more BM (Bottom margi n) 0.0mm or more

Rev. A

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LQ-670 Service Manual

1.2.6 Ribbon Cartridge

Type : Fabric Color : Black Ribbon life : 2 million characters (LQ 10cpi, 48 dots/character) Dimensions :120.5mm(W) x 101.5mm(D) x 23.5mm(H)

1.2.7 Input data buffer

0 Kbyte or 64 Kbyte*

Note*)

: Depends on default settings.

1.2.8 Electrical Specification

120V version



Rated voltage : AC120V Input voltage range : AC103.5 to 132V Rated frequency range : 50 to 60 Hz Input frequency range : 49.5 to 60.5 Hz Rated current : 0.7A(max.2.2A) Power consumption : Approx.30W (ISO/IEC10561 Letter pattern)

Energy Star Compliant

Insulation resistance : 10 MΩ min.(between AC line and chassis, DC 500V) Dielectric strength : AC1000 Vrms. 1min.or

AC1200 Vrms. 1 sec.(between AC line and chassis)

230 V version

Rated voltage : AC220 to 240V Input voltage range : AC198 to 264V Rated frequency range : 50 to 60Hz Input frequency range : 49.5 to 60.5Hz Rated current : 0.4A (max.1.1A) Power consumption : Approx.30W (ISO/IEC10561 Letter pattern)

Energy Star Compliant

Insulation resistance : 10MΩ min. (between AC line and chassis, DC 500V) Dielectric strength : AC1500 Vrms. 1min.(between AC line and chassis)

1.2.9 Reliability

Total print volume : 6.5 million lines (except print head) (MTBF) : 5000 POH Print head life : 200 million strokes/wire Ribbon life : 2 million characters

1-1

Rev. A

1.2.10 Environmental Condition

Temperature

Operating : 5 to 35 °C(without condensation)

: 15 to 25 °C (without condensation and during printing on multi part paper, envelope, card or label)

Non-operating : −30 to 60 °C

Humidity

Operating : 10 to 80% RH (without condensation)

: 30 to 60% RH (without condensation and during printing on multi part paper, envelope, card or label)

Non-operating : 0 to 85% RH (without condensation)

Resistance to shock

Operating : 1G, within 1ms Non-operating : 2G, within 2ms

Resistance to vibration

Operating : 0.25G,10 to 55 Hz Non-operating : 0.50G,10 to 55 Hz

Chapter 1 Product Description

1.2.11 Safety Approvals

120V version

Safety standards : UL1950 with D3

CSA C22.2 No.950 with D3

EMI : FCC part15 subpart B class B

: CSA C108.8 class B

230V version

Safety standards : EN60950(VDE, NEMKO) EMI : EN55022(CISPR pub.22) class B

: AS/NZS 3548 class B

1.2.12 CE Marking

230V 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

1.2.13 Acoustic Noise

Level : Approx. 55 dB(A) (ISO 7779 pattern)

Rev. A

1-1

LQ-670 Service Manual

1.3 Firmware Specification

This section provides detailed information about LQ-670 firmware.

1.3.1 Control Codes and Fonts

Control codes: :ESC/P 2 and IBM 2390 Plus emulation Typefaces :Bit map font

EPSON Draft 10CPI, 12CPI, 15CPI EPSON Roman 10CPI, 12CPI, 15CPI, Proportional EPSON Sans Serif 10CPI, 12CPI, 15CPI, Proportional EPSON Courier 10CPI, 12CPI, 15CPI EPSON Prestige 10CPI, 12CPI EPSON Script 10CPI EPSON OCR-B 10CPI EPSON Orator 10CPI EPSON Orator-S 10CPI EPSON Script C Proportional EPSON Draft(Arabic) 10CPI, 12CPI EPSON Draft(Hebrew) 10CPI, 12CPI EPSON Miriam 10CPI, Proportional EPSON David 10CPI, Proportional EPSON Naskh 10CPI, Proportional EPSON Kufi 10CPI, Proportional

:Scalable font

EPSON Roman 10.5pt., 8pt.-32pt.(every 2pt.) EPSON Sans Serif 10.5pt., 8pt.-32pt.(every 2pt.) EPSON Roman T 10.5pt., 8pt.-32pt.(every 2pt.) EPSON Sans Serif H 10.5pt., 8pt.-32pt.(every 2pt.)

:Bar code

Ean-13 EAN-8 Interleaved 2 of 5 UPC-A UPC-E Code 39 Code 128 POSTNET

International character sets :14 countries and legal

U.S.A, France, Germany, U.K., Denmark 1, Sweden, Italy, Spain 1, Japan, Norway, Denmark 2, Spain 2, Latin America, Korea, Legal

Note)

The international and legal characters are these 12 codes;

23H, 24H, 5BH, 5CH, 5DH. 5EH, 60H, 7BH, 7CH, 7DH, 7EH.

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Chapter 1 Product Description

Character tables :The standard version has 11 character tables and the NLSP version has

20 charater tables, as shown in the following table.

Table 1-18. Character Tables

Character table Bitmap font Scalable font

Standard version

NLSP version

Italic table PC437(US Standard Europe) PC850(Multilingual) PC860(Portuguese) PC861(Icelandic) PC863(Canadian-French) PC865(Nordic) Abicomp BRASCII

Roman 8 ISO Latin 1

Italic table PC437(US, Standard Europe) PC850(Multilingual) PC860(Portuguese) PC861(Icelandic) PC865(Nordic)

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

PC864(Arabic) EPSON Draft

EPSON Roman PC437 Greek PC852(East Europe) PC853(Turkish) PC855(Cyrillic) PC857(Turkish) PC866(Russian) PC869(Greek) MAZOWIA(Poland) Code MJK(CSFR) ISO 8859-7 (Latin/Greek) ISO Latin 1T(Turkish) Bulgaria(Bulgarian) Estonia(Estonia) PC744(LST 1283:1993) ISO 8859-2 PC866 LAT.(Latvian) PCAPTEC(Arabic) PC708(Arabic) PC720(Arabic) PCAR864(Arabic) Hebrew7 *1 Hebrew8 *1 PC862(Hebrew) *1

EPSON Draft

EPSON Roman

EPSON Sans Serif

EPSON Courier

EPSON Prestige

EPSON Script

EPSON Draft(Arabic)

EPSON Naskh

EPSON Kufi

EPSON Draft(Hebrew)

EPSON Miriam

EPSON David

(Not supported) (Not supported)

(Not supported)

Note *1) These fonts are not selected in the default setting mode.

Note)

Rev. A

ESC R command is effective on the character tables with bold weight.

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LQ-670 Service Manual

1.3.2 Interface Specification

This printer provides bi-directional 8-bit parallel interface and Type-B optional interface slot as standard.

1.3.2.1 Parallel interface (Forward channel)

[Transmission mode] [Adaptable connector] [Synchronization] [Handshaking] [Signal level]

Table 1-19. Connector Pin Assignment and Signals

Pin No. Signal Name Return

1 /STROBE 19 In Stroke pulse. Input data is latched at falling edge of

2∼9DATA1∼820∼27

10 /ACKNLG 28 Out This signal (negative pulse) indicates that the printer

11 BUSY 29 Out This signal’s “HIGH” level indicates that the printer

12 PE 28 Out This signal’s “HIGH” level indicates that the printer

13 SLCT 28 Out Always at high level when the printer is powered on. 14 /AFXT 30 In Not used. 31 /INIT 30 In This signal’s negative pulse initializes printer. 32 /ERROR 29 Out This signal’s low level means the printer is in a state

36 /SLIN 30 In Not used. 18 Logic H ---- Out 35 +5V --- Out

17 Chassis --- --- Chassis GND. 16,33 19-30 15,34 NC --- --- Not connected.

GND --- --- Signal GND.

: 8 bit parallel, IEEE-1284 compatibility mode : 57-30360 (Amphenol) or equivalent : /STROBE pulse : BUSY and /ACKNLG signals : TTL compatible (IEEE-1284 level 1 device)

In/Out * Function description

GND

the signal.

In Each signal represents information of parallel data

from 1 bit to 8 bit. The data is 1 at “HIGH” and is 0 at “LOW”.

has received data and is ready to accept next one. The pulse width is 5µs.

is not ready to accept data. On the other hand, “LOW” means the printer can take data. (Refer to the next page for conditions when this signal becomes high level)

is in a state of paper-out error.(Refer to the next page for the condition when this signal becomes high level.)

of error. (Refer to the next page for conditions when the signal becomes low level)

This line is pulled up to +5V through 3.9 kΩ resistor. This line is pulled up to +5V through 1.0 kΩ resistor.

Note)

*In/Out shows the direction of signal flow from the printer's point of view.

Note)

If the signal is “LOW” and active state, the signal is marked with “/”.

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Chapter 1 Product Description

BUSY signal is active (high level) under the following conditions.

In the process of receiving data. In the condition of being input buffer full In the condition of being /INIT signal active(low level) During hardware initialization In the condition of being /ERROR or PE signal active(low level, high level, respectively) In the self test mode In the adjustment mode In the default-setting mode

/ERROR signal is active(low level) under the following conditions.

In the condition of the release lever error In the condition of the paper-out error In the condition of the paper-jam error

PE signal is active(high level) under the following condition.

In the condition of paper-out error

Note)

It becomes possible to input the data without outside equipment by setting appropriate connecting.

Note)

Rev. A

Figure 1-9. Data Transmission Timing

Table 1-20. Maximum and Minimum Timings for Data Transmission

Parameter Minimum Maximum

tsetup 500 nsec ---

thold 500 nsec ---

tstb 500 nsec ---

tready 0 ---

tbusy --- 500 nsec treply --- ---

tack 500 nsec 10 us

tnbusyt 0 ---

tnext 0 ---

ttout* --- 120 nsec

ttin** --- 200 nsec

* Rise and fall time of output signals. ** Rise and fall time of input signals.

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LQ-670 Service Manual

1.3.2.2 Parallel Interface (Reverse channel)

[Transmission mode] [Adaptable connector] [Synchronization] [Handshaking] [Signal Level]

[Data transmission timing] [Extensibility request]

when the request is 00H or 04H, which mean;

[Device ID]

Table 1-21. Connector Pin Assignment and Signals

Pin No.

1 HostClk 19 In Host clock signal 2∼9DATA1∼820∼27

10 PtrClk 28 Out Printer clock signal. 11 PtrBusy, DataBit-3,7 29 Out Printer busy signal and reverse channel

12 AckDataReq, DataBit-2, 6 28 Out Ack nowledge data request signal and reverse 13 Xflag, DataBit-1, 5 28 Out X-flag signal and reverse channel trans f er data 14 HostBusy 30 In Host busy signal.

31 /INIT 30 In Not used. 32 /Data Av ail, DataBit-0, 4 29 Out Data available signal and reverse channel

36 1284-Active 30 In 1284 active signal. 18 Logic-H --- Out A high signal indicates that all other signals

35 +5V --- Out 17 Ch assis --- --- Chassis GND.

16,33,

19-30 15,34 NC --- --- Not connected.

GND --- --- Signal GND.

Signal Name Return

: IEEE 1284 nibble mode : 57-30360(Amphenol) or equivalent : /STROBE pulse : BUSY and /ACKNLG signals : IEEE-1284 level 1 device TTL compatible : Refer to the IEEE-1284 specification : The printer responds to the extensibility request in the affirmative,

00H:Request nibble mode of reverse channel transfer 04H:Request device ID in nibble mode of reverse channel

transfer. : [00H] [3AH] MFG: EPSON; CMD:ESCPL2,PRPXL24, BDC; MDL;LQ-670; CLS:PRINTER;

In/Out* Function description

GND

In Parallel input data to the printer.

transfer data bit 3 or 7. channel transfer data bit 2 or 6. bit1 or 5.

transfer data bit0 or 4.

sourced by the peripheral are in a valid state. This line is pulled up to +5V through 1.0 kΩ

resistor.

Note*):

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In/Out refers to the direction of signal flow/from the printer’s point of view.

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Chapter 1 Product Description

1.3.2.3 Optional Interface

Type-B optional interface cards are available.

Table 1-22. Optional Interface

Reply message ESC/P2 IBM 2390 Plus

Main-Type MT24p,PW106cl10cpi,PRG(W0xxxx)rev MT24p,PW106c110cpi,PRG(W0xxxx)rev

Product-Name LQ-670 LQ-670

Emulation-Type ESCPL2-00 PRPXL24-01

Entity-Type EPSONLQ2 EPSONPRPXL24

1.3.2.4 Interface Selection

The printer has 2 interfaces; the parallel interface and Type B optional interface. These interfaces are selected manually by Default setting or selected automatically.

1.3.2.5 Manual selection

Out of 2 interfaces can be selected by Default Setting.

1.3.2.6 Automatic selection

The automatic interface selection is enabled by Default Setting. In this automatic interface selection mode, the printer is initialized to the idle state scanning which interface receives data when it is powered on. Then the interface that receives data first is selected. When the host stops data transfer and the printer is in stand-by state for the seconds specified by Default Setting, the printer is returned to the idle state. As long as the host sends data or the printer interface is bus y state, the selected inter f ace is let as it is.

1.3.2.7 Interface state and interface selection

When the parallel interface is not selected, the interface gets into a busy state. When the Type-B serial interface card is installed and it is not s elec ted, the inter f ace s ends X OFF and s ets the DT R s ignal MARK. When the optional interface is not selected, the printer sends disable commands to the optional interface. When the printer is initialized or returned to the idle state, the parallel interface gets into a ready state, the serial interface sends XON and sets the DTR SPACE and the printer sends enable commands to the optional interface. Caution that the interrupt signal such as a /INIT signal on the parallel interface is not effective while that interface is not selected.

1.3.3 Prevention Hosts from Data Transfer Timeout

Generally, hosts abandons data transfer to peripherals when a peripheral is in busy state for dozens of seconds continuously. To prevent hosts from this kind of timeout, the printer receives data very slowly, several bytes per minute, even if the printer is in busy state. This slowdown is started when the rest of the input buffer becomes s everal hundreds of bytes. At last, when the input buffer is full, the printer is in busy state continuously.

Rev. A

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LQ-670 Service Manual

1.4 Operation

1.4.1 Control Panel

There are 7 switches and 8 LEDs on the panel as shown below.

Operate

Micro Adjust

LF/FF

Draft Roman

Sans Serif Courier

Prestige

Script

Others

Font

Condensed

Paper Out

Pause

Figure 1-10. Control Panel

3sec

Load/Eject

Tear Off/Bin

Tear Off

Bin 1 Bin 2 Card

LED Off

LED On LED Blinks

1.4.1.1 Usual Operation

Operate

This switch turns the printer on and off. It is the secondary switch.



Pause

This switch alternates printer activity between printing and non-printing. Holding it down over 3 seconds when the printer is in the stand by state, the Micro Adjust function is enabled. Pressing it again, this function is disabled.

Load/Eject

Pressing it loads cut sheet or continuous paper when the printer is out of paper. Pressing it ejects cut sheet to the stacker or continuous paper to the paper park.

LF/FF

Pressing it shortly executes line feed. Holding it down for a few seconds executes form feed when continuous paper is used, or ejects cut sheet to the stacker when cut sheet is used.

Tear Off

When continuous paper is used, pressing it moves a page to the Tear-off position. And pressing it again moves a next page to the TOF position.

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Chapter 1 Product Description

Bin

Pressing it selects CSF bin number or the Card mode* when cut sheet is used.

Note*)

Card mode is for using post card or envelope.

Font

Pressing it selects one of following fonts. Draft, Roman, Sans serif, Courier, Prestige, Script and Others *.

Note*)

Others means the font selected in the Default Setting Mode.

Condensed

Pressing it alternates condensed and non-condensed mode.

Micro Adjust

Micro Adjust ↑/↓ switches is effective when the Micro Adjust function is enabled by Pause switch. Pressing the Micro Adjust ↑/↓ switches execute micro feed backward and forward by 1/80 inch. The TOF adjustment is enabled in the TOF position after loading, and the Tear-off adjustment is enabled in the Tear-off position.

Rev. A

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+ 105 hidden pages

Epson LQ 670 User Manual

PRECAUTIONS

REVISION SHEET

TABLE OF CONTENTS

Product Descriptions

1.1 Specifications