Epson Stylus Color 740, Stylus Color 640, Stylus Color 440 Service Manual

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

Color ink jet printer

EPSON Stylus COLOR 440/640/740

TM-SC4/6/740

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EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

PREF ACE

This manual describes basic functions, theory of electrical and mechanical operations, and maintenance and repair procedures of the Stylus COLOR 440, 640, and 740. The instructions and procedures included herein are intended for experienced repair technicians, and attention should be given to the precautions on the following pages.

Revision Date

Release November 1998

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EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

FCC COMPLIANCE STATEMENT

FOR AMERICAN USERS

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to prov ide reaso nable prote ction agains t harmful inter fe rence in a residential in stallation. T his equipmen t generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio and telev is ion reception. However, there is no guarante e th at int erference will not occur in a particul ar installatio n. If t his equipment does cause interfere nc e to radio an d t elevision rec eption, wh ic h c an be determined by turning the eq uipment of f an d on, the use r is enc ouraged to try to correct th e interferenc e by one or more of the fol low ing measures:



Reorient or relocate th e receiving antenna.



Increase the separation between the equipment and receiver.



Connec t the equipm ent into an out let on a circuit di fferent from th at to wh ic h t he receiver is c onnected.



Consult t he dealer or an experien c ed radio/TV t ec hnician for help.

WARNING

The conn ec t ion of a non-shielded equipmen t in te rf ac e cable to th is equipment w ill invalidate t he FCC Certification of this device and may cause interference levels that exceed the limits established by the FCC for this equipment. It is the responsibility of the user to obtain and use a shielded equipment interfa c e c able with this device. If this equipmen t has m ore than on e int erface con nector, do n ot leave cables c onnected to unus ed interfaces.

Changes or modifica t ions not expr es s ly approved b y the m anufactur er c ould void the user's authority to op erate the printer.

FOR CANADIAN USERS

This Clas s B digital appa rat us meets all requirem ents of the Ca nadian Interf erence-Causing Equipment R egulations. Cet appa reil numériq ue de la class e B respecte to ut es les exigenc es du Règlement sur le ma t eriel brouilleur du Cana da.

iii

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EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

All rights r eser ved. No part of thi s p ublica ti o n may be rep roduce d, sto red i n a re tr i eval system, or transmitted in any form o r by any means, electronic, mechan ic al, photocopy ing, recording, or otherwise, with out the writte n permissi on of Epson Am erica, Inc. No patent liabilit y is assumed with respect to use of the inf ormation co nt ained herein. Neithe r is any liability assumed for damages res ulting from th e use of the information c ontained herein. While eve ry precaution has been tak en in the pre paration of th is book, Epso n America, Inc., assumes no responsibility for errors and omissions.

Neither E ps on America, I nc . , n or it s af fi liat es shall be liable to the purchaser of th is product or th ird parties for dam ages, losses, costs, or expenses incurred by purchaser or third parties as a result of: accident, misuse, or abuse of this product or unauthorized modifications, repairs, or alterations to this produ c t.

Epson America, Inc., shal l no t be l i abl e agai nst any damage s or p roble ms ari si n g fro m the u se of a ny op ti ons or a ny consumable products other than those designated a s O riginal EPSON Produ c ts or EPSON -Approved Products by Seiko Epson Corpor at ion.

TRADEMARKS

EPSON and ESC/ P are registe red trademarks and ESC / P 2, EPSON FX-880, and EPSON F X-1180 are tradem ark s of Seiko Epson Corporat ion. Epson C onnection is a s erv ic e mark of Ep s on America, In c .

General Notice:

EPSON dis c laims any a nd all rights in t hos e marks.

Other product name s us ed herein are for identif ic at ion purpos es only and may be trademark s of t heir respect iv e c om panies.

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EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

PRECAUTIONS

Precaut ionary notat ions throughout the te xt are categorized with re s pect to: (1) pers onal injury and (2) dam age to equipment.

W ARNING

CAUTION

Always obs erve the precautions lis t ed below when performing repair and maintenance pr oc edures.

Signals a precaution which, if ignored, could result in se rious or fata l personal inj ury . Great cauti on s hould be ex erc is ed in performing a procedure preceded by a WARNING.

Signals a precaution which, if ignored, could result in damage to equipmen t.

WARNING

1. Always dis c onnect the product from both the pow er source and the host co m puter before performing any maintenance or repair procedure.

2. No work sh ould be perfo rm ed on the un it by persons unf am iliar with bas ic s af et y m easures dic t at ed for all elect ronics technicians in their line of work.

3. In performing testin g described in this manu al, do not connec t t he unit to a pow er s ource until instructed t o do so. When the po w er s upply cable must be co nnected, use extreme ca ut ion in working on the po w er s upply and o th er electronic c om ponents.

CAUTION

1. Repairs o n EPSON pr oducts should be perfo m ed only by an EPSON-certified repair technic ian.

2. Make certain that the source voltage 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 the available power source, do not connect it to the power source.

3. Always ve rif y th at th e EPSON pr oduct has be en disconnected from t he power source before removing or replac ing printed circ uit boards or individual chips.

4. To protect se ns it iv e microproc essors an d ot he circuitr y, us e static discharge equipment, su c h as anti-static wr is t st raps, when a c c es s ing interna l components.

5. Replace ma lf unctioning c om ponents only with thos e c om ponents rec ommended by the ma nuf acturer; in tr oduction of sec ond-sour c e ICs or other nonappr ov ed components may damage the product and void an y a pplicable EP SON warranty.

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EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

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EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

1. Product Description

Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Printing Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Paper Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Cut Sheets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Transparencies, Glossy Paper . . . . . . . . . . . . . . . . . 9

Envelopes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Card Stock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Printable Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Adjust Lever Setting (PG Adjust Lever). . . . . . . . . . . 12

Ink Cartridge Specifications . . . . . . . . . . . . . . . . . . . . . . . 13

Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . 15

Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Safety Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

CE Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Parallel Interface (Forward Channel). . . . . . . . . . . . . . . . 17

Parallel Interface (Reverse Channel). . . . . . . . . . . . . . . . 19

Host Data Transfer Timeout Prevention . . . . . . . . . . 22

Interface Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Serial Interface (Stylus COLOR 740 only) . . . . . . . . . . . . 23

USB Interface (Stylus COLOR 740 only). . . . . . . . . . 23

Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Indicators (LEDs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Control Panel Functions. . . . . . . . . . . . . . . . . . . . . . . . . . 25

LED Indicators and Printer States . . . . . . . . . . . . . . . . . . 26

Error Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Ink Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Paper Out. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 7

Paper Jam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

No Ink Cartridge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Maintenance Request . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Fatal Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Printer Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

Initialization Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Main Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 0

Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

C206 MAIN-B Board (Stylus COLOR 440). . . . . . . . . . . .31

C256 MAIN Board (Stylus COLOR 640) . . . . . . . . . . . . . 31

C257 MAIN Board (Stylus COLOR 740) . . . . . . . . . . . . . 32

Power Supply Board

C206 PSB/PSE (Stylus COLOR 440 and 640)

C257 PSB/PSE (Stylus COLOR 740) . . . . . . . . . . . .32

C206 PNL Board (Stylus COLOR 440 and 640) . . . . . . .33

C209 PNL Board (Stylus COLOR 740) . . . . . . . . . . . . . .33

2. Operating Principles

Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Printhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Printing Process. . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Carriage Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Platen Gap and Parallelism Adjustment Mechanisms . . . 39

Carriage Lock Mechanism . . . . . . . . . . . . . . . . . . . . . . . .40

Paper Feed Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

Paper Handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

ASF transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Automatic Sheet Feeder (ASF) . . . . . . . . . . . . . . . . .42

Paper Feed Mechanism. . . . . . . . . . . . . . . . . . . . . . .43

Ink System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

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EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

Head Cleaning Operations . . . . . . . . . . . . . . . . . . . . 44

Pump Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Capping Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . 47

Electronic Circuit Boards. . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Power Supply Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Power Supply Operation . . . . . . . . . . . . . . . . . . . . . . 49

Main Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

CPU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Gate Array. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

EEPROM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Power-Off Timer Circuit. . . . . . . . . . . . . . . . . . . . . . . 58

Sensor Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Printhead Driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Paper Feed (PF) Motor Driver. . . . . . . . . . . . . . . . . . 63

Carriage (CR) Motor Drive Circuit . . . . . . . . . . . . . . . 64

3. Troubleshooting

Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Component Test Specifications . . . . . . . . . . . . . . . . . . . . 68

Unit Level Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . 71

Printer Does Not Turn On . . . . . . . . . . . . . . . . . . . . . . . . 71

Error Indicated by LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . 72

Printing Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Paper Not Feeding Correctly . . . . . . . . . . . . . . . . . . . . . . 73

Control Panel Operation is Abnormal. . . . . . . . . . . . . . . . 73

Unit Repair of the Power Supply Board . . . . . . . . . . . . . . . 74

Unit Repair of the Main Board. . . . . . . . . . . . . . . . . . . . . . . 77

Repair of the Printer Mechanism. . . . . . . . . . . . . . . . . . . . . 82

4. Disasse mbly and Assembly

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Precautions for Disassembling the Printer. . . . . . . . . . . . 86

Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

Specification for Screws. . . . . . . . . . . . . . . . . . . . . . . . . .88

Service Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

Disassembly Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Removing the Housing. . . . . . . . . . . . . . . . . . . . . . . . . . .91

Removing the Board Assembly . . . . . . . . . . . . . . . . . . . . 92

Removing the Front Panels . . . . . . . . . . . . . . . . . . . . . . .94

Disassembling the Printer Mechanism. . . . . . . . . . . . . . .95

Removing the Printhead . . . . . . . . . . . . . . . . . . . . . .95

Removing the Waste Ink Pad Assembly . . . . . . . . . .98

Removing the Pump and Capping Assemblies . . . . .99

Removing the CR Motor . . . . . . . . . . . . . . . . . . . . . .102

Removing the PF Motor. . . . . . . . . . . . . . . . . . . . . . .103

Removing the ASF Assembly . . . . . . . . . . . . . . . . . .105

Removing the Carriage Assembly . . . . . . . . . . . . . . .109

Removing the Paper Feed and Paper Eject Roller

Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Removing the PE Sensor. . . . . . . . . . . . . . . . . . . . . .113

Removing the HP Sensor . . . . . . . . . . . . . . . . . . . . .114

5. Adjustments

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

Adjustment Tools Required . . . . . . . . . . . . . . . . . . . . . . .117

Choosing the Correct Adjustment Program. . . . . . . .117

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Parallelism Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . .118

Using the Adjustment Program . . . . . . . . . . . . . . . . . . . .120

Operating Environment . . . . . . . . . . . . . . . . . . . . . . .120

Starting the Adjustment Program . . . . . . . . . . . . . . . .120

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EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

Entering the Main Menu. . . . . . . . . . . . . . . . . . . . . . . 121

Initial Ink Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Head Cleaning Operation . . . . . . . . . . . . . . . . . . . . . 126

Protection Counter. . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Market Destination Check . . . . . . . . . . . . . . . . . . . . . 129

Head Voltage ID Input. . . . . . . . . . . . . . . . . . . . . . . . 131

Head Angle Adjustment. . . . . . . . . . . . . . . . . . . . . . . 133

Bi-D Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Printing the A4 Check Pattern . . . . . . . . . . . . . . . . . . 138

6. Maintenance

Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Corrective Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Printhead Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Maintenance Request . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

7. Appendix

Connector Summary (Stylus COLOR 440 and 640). . . . . . 147

Connector Summary (Stylus COLOR 740). . . . . . . . . . . . . 151

EEPROM Address Map (Stylus COLOR 440 and 640). . . . 155

EEPROM Address Map (Stylus COLOR 740) . . . . . . . . . . . 159

Circuit Board Component Layouts. . . . . . . . . . . . . . . . . . . 1 64

Exploded Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Page 10

PRODUCT DESCRIPTION



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EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

(

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g (cy

)

(

)

(



1.1 Features

The EPSON Stylus COLOR 440/640 /7 40 printers are highperformance, low-cost printers desi

SOHO) market. The Stylus COLO R 440 has the sa m e print quality

720 × 720 dpi) as the Stylus ProXL; the Stylus COLOR 640 and Stylus COLOR 740 have the same print COLOR 60 0 and St

The main features of these printers are:





uality color print in

h resolut ion:

lus COLO R 440—720 (H) x 720 (V) dpi lus COLO R 640—1440 (H) X 720 (V) dpi

St St

lus COLO R 740—1440 (H) X 720 (V) dpi

Standard four-color printin Stylus COLOR 440—Black: 64 nozzles; CMY: 21 nozzles

lus COLOR 640: Black: 64 nozzles; CMY: 32 nozzles

lus COLO R 740: Black: 144 nozzles ; C M Y: 48 nozzles

St Tradition al printin

bandin

lus COLOR 800.

and new Microweave printing that eliminates

ned for the small office/home office

uality (1440 × 720) as the Stylus

an, magenta, yellow, an d black





Compact size









Acous tic noise

  



One combined printhead for black and color

lus COLOR 740: 200 cps

The print er’s head dr iv e f re that is twice as fast as t hat of the St models

155 mm) H

157 mm) H

6.2”

ht-weight

Wei

St St St

lus COLOR 440: 16.9” (429 mm) W x 9” (231 mm) D x 6.1”

lus COLOR 640: 16.9” (429 mm) W x 9: (231 mm) D x 6.2”

lus COLOR 740: 16.9” (429 mm) W x 10.3” (261 mm) D) x

157 mm) H

ht: 11.5 lbs. (5.2 Kg)

lus COLOR 440: Approximately 45 dB lus COLOR 640: Approximately 47 dB lus COLOR 740: Approximately 47 dB

uency, 14.4 KHz, allows printing

lus COLOR (true of all three



Built-in aut o s heet feeder



Holds 100 cut-sheets



Holds 10 e nv elopes



Holds 10 transparencies



Holds 65 sheets of spec ial paper



h-speed printing



lus COLO R 440: 200 cps at 10 c pi



lus COLO R 640: 200 cps in N ormal mode, 400 cps in Dr af t

St mode

55 g/m2



Bidirectional parallel interface three models



Additional interfac es:



lus COLOR 740: USB



Operatin



environm ents: lus COLOR 440 and 640: Windows onl lus COLOR 740: Windows and Macintosh

IEEE-1284 level 1 device) for all

Page 12

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description



Fonts:



All three m odels: Stan dard and NLS P



Stylus COLO R 740: 5 scalab le fonts

Table 1-1. Consumables Available for Stylus Color 440/640/740

Items Codes Remarks

Black ink cartridge S020189 Stylus Color 740 Black ink cartr idge S020187 Stylus Color 440, 640 CMY ink cartridge S020191 Stylus Color 440, 640, 740 EPSON 360 dpi ink jet paper S041025 Size: A4 (200 sheets ) EPSON 360 dpi ink jet paper S041059 Size: A4 (100 sheets) EPSON 360 dpi ink jet paper S041060 Size: Letter (100 sheets) Photo quality ink jet paper S041026 Size: A4 (200 sheets) Photo quality ink jet paper S041061 Size: A4 (100 sheets ) Photo quality ink jet paper S041062 Size: Letter Photo quality ink jet paper S041067 Size: Legal Photo quality glossy paper (new

release) Photo quality glossy paper (new

release) Photo quality glossy film S041071 Size: A4 Photo quality glossy film S041124 Size: Letter Photo quality glossy film S041107 Size: A6 Ink jet transparencies S041063 Size: A4 Ink jet transparencies S041064 Size: Letter Photo quality ink jet cards S041054 Size: A6 Photo quality ink jet cards S041121 Size: 5 x 8 inches Photo quality ink jet cards S041122 Size: 8 x 10 inches Photo quality self-adhesive sheets S041106 Size: A4

S041126 Size: A4

S041124 Size: Letter

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EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

)



1.2 Specifications

Nozzle Confi

urations:

This section provide s th e f ollowing information for all three printers: printin settin specifica t ions, reliabilit

specifica ti ons , paper specif ic ations, pri nt able area, a djust lever

s, ink cartridge specific at ions, enviro nm ental conditions, el ec t ric

statistics, safety approvals, and CE marking.

1.2.1 Printing Specifications



Print method



On-demand ink color heads



Print direc t ion



Bidirecti onal with lo



Print spee d/ Printable co lum ns

Table 1-2. Character Mode Speed

Model Name

Stylus COLOR 440 10 80 200 CPS — Stylus COLOR 640 10 80 200 CPS 400 CPS Stylus COLOR 740 10 80 200 CPS —

et (MACH type; one unit c om bining black an d

ic seekin

Character

Pitch

Printable Columns

LQ Speed Draft Speed



lus COLOR 440 (see Figure 1-1):

Black— 64 nozzles

Color—21 nozzles

lus COLOR 640 (see Figure 1-2):

3 (CMY

Black— 64 nozzles

Color—32 nozzles

lus COLOR 740 (see Figure 1-3):

3 (CMY

Black— 144 nozzles Color—48 nozzles × 3 (CMY

Table 1-3. Graphic Mode Speed

Horizontal

Resolution

180 dpi 8.26 1488 20 IPS 360 dpi 8.26 2976 20 IPS 720 dpi 8.26 5952 20 IPS

Printable Area Available dots CR Sp eed

Page 14

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

Y2 Y3

Y19

Y20

Y21

M 1

M 2

M 3

M 4

M 19

M 20

M 21

90DPI

#3 #5

10.16 mm2.2578 mm

7.9022 mm

C2 C3

C19 C20

C21

#23

#25 #27 #29

#59

#61

#63

#2 #4

2.2578 mm

#24

#26

#60

#62

#64

180DPI

Y1 Y2

2.2578 mm

Y12

Y13 Y14

Y15

Y30 Y31

Y32

M1 M2

10.16 mm

M12

M13 M14

M15

M30 M31

M32

C1 C2

7.9022 mm

C12

C13 C14

C15

C30 C31

C32

90DPI

#3 #5

#23

#25 #27 #29

#59

#61

#63

2.2578 mm

#24

#26

#60

#62

#64

180DPI

(Y)

(M)

(C)

(B2)

(B1)

Figure 1-1. Nozzle Configuration for the Stylus COLOR 440

(Y)

(M)

(C)

(B2)

(B1)

Figure 1-2. Nozzle Configuration for the Stylus COLOR 640

Page 15

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

(

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(

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

Feed method

32/360"

#10

#11

112/360"

#10

#11

32/360"

#10

#11

112/360"

#10

#13

#16

#19

#22

#25

#28

#31

32/360"

#11

#14

#17

#20

#23

#26

#29

#32

#12

#15

#18

#21

#23

#26

#29

#32





Line spac in





Paper path





Feed speed





Ink suppl

Friction feed with the ASF

lus COLOR 440: 1/6 inch, or programmab le in units of 1/360

Automatic Sheet Feeder

inch St

lus COLOR 640: 1/6 inch, or programmab le in units of 1/360

inch St

lus COLOR 740: 1/6 inch, or programmab le in units of 1/360

inch

Cut-sheets: ASF (top entr

lus COLOR 440 and 640:

St 190 ms per 1/3-inch

2.0 in/sec lus COLOR 740

50.8 mm/sec), continuous

110 ms, advancin

4.5 in/sec

114.3 mm/sec), continuous

8.5-mm) increme nt advance

in 0.4-inch (10.16-mm) increm ents



#47

#48

Ink cartrid

#47

#48

(M)(Y)

#47

#48

(C)

(B1)

#139

#142

(B2)

#140

#143

(B3)

#141

#144



Input da ta buffer



lus COLOR 440: 10 Kb



lus COLOR 640: 32 Kb



lus COLOR 740: 64 Kb

es (Black an d C M Y

Figure 1-3. Nozzle Configuration for the Stylus COLOR 740

Page 16

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

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)

(

)

(



Paper capacit



Size: Index card to L e



Thickness: Less than 8 mm



Paper capacit

Photo Paper, Iron-On Cool Pee l



Character tables:



lus COLO R 440 and 640



PC437

of input tra

: 100 cut sheets

10 envelopes 65 sheets of c oated pape r 65 sheets of c oated pape r

lossy sheets or sheets of EPSON Photo

Paper 30 transparency sheets 30 index cards 1 sheet of an

Transfer Paper, Pho to St ic k ers ,

Gloss

Film, Self Ad hesive Paper

US, Standard Europe

360 dpi) 720 dpi)

of the follow ing: Panoramic



lus COLOR 740



Standard version: 11 charac t er t ables Italic, PC437 PC860

US Standard, Europe), PC850 (Multilingual),

Portuguese), PC861 (Iceland ic), PC863

Canadian-French), PC865 (Nordic), Abicomp, BRASC I I,

Roman 8, IS O Latin 1



NLSP v ers ion: 30 charac t er t ables Italic, PC437, PC437 Greek , P C 850, PC852, PC 853, PC855, PC857, PC860, PC861, PC865, PC866, ISO8859-7, ISO Lat in 1T , PC 774, Esto nia, ISO8859-2, PC866-LAT, PC866UKR, PC AR864, PC APTEC, PC708, PC720, Hebrew7

, Hebrew8*, PC862

NOTE: Character t ables mark ed with an asterisk are not av ailable for

selection in the default setting mode.



PC850

Multilingual

NOTE: Thes e c haracter se ts are not available for selection in th e

default set t ing mode.

Page 17

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

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(

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(

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(

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(

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

pefaces

1.2.2.1 Cut Sheets



lus COLO R 440 and 640

St Bitmap LQ fo nt : EPSON Courier 10 cpi



lus COLO R 740



Bitmap LQ fo nt s : EPSON R om an 10 cpi, 12 cpi, 15 cpi, Pro portional EPSON Sans Serif 10 cpi, 12 cpi, 15 cpi, Pro portional EPSON C ourier 10 cpi, 12 cpi, 15 cpi EPSON Presti

e 10 cpi, 12 cpi, 15 cpi

EPSON Sc ript 10 cpi, 12 cpi , 15 cp i



Scalable f onts: EPSON Roman 10.5 pt.; 8 to 32 pt.

2 pt. increments EPSON Sans Serif 10.5 pt.; 8 to 32 pt. (2 pt. increments EPSON Roman T 10.5 pt.; 8 to 32 pt. (2 pt. increments EPSON Sans Serif H 10. 5pt.; 8 to 32 pt. (2 pt. increments

NOTE: Each t yp ef ace has 4 va riat ions: Normal, Bold, Italic, and Bold

Italic.



Control codes



lus COLO R 440 and 640 ESC/P raster EPSON remote commands

Sizes

Letter: Width 8 .5 ” Le

al: Width 8.5”

216 mm) x Length 11.0” (279 mm)

216 mm) x Length 14.0” (356 mm Statement: Width 5 .5 ” (139.7 mm) x Length 8.5” (216 mm Exclusiv e: Width 7.5” (190.5 mm) x Length 10” (254 mm A4: Width 8.3” (210 mm) x Length 11.7” (297 mm B5: Width 7.2”

182 mm) x Length 10.1” (257 mm

Thickness

0.003”

0.08 mm) to 0.004” (0.11 mm

Weight

17 lb

64 g/m

to 24 lb (90 g/m

Quality

EPSON paper, bon d paper, or PPC



lus COLO R 740 ESC/P2 and ESC/P raster EPSON remote commands

1.2.2 Paper Specifications

This section describes the printable area and types of p aper th at c an be used with t hes e printers.

Page 18

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

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)

(

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(

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(

)

(

)

(

)

(

)

1.2.2.2 Transparencies, Glossy Paper

Sizes

Letter: Width 8.5”

216 mm) x Length 11.0” (279 mm

A4: W idth 8.3” (210 mm) x Length 11.7” (297 mm

Thickness

0.003”

0.075 mm) to 0.0033 ” (0.085 mm

NOTE: Printing on transparencie s is available only at normal

temperatures.

1.2.2.3 Envelopes

Sizes

No.10 Width 9.5” DL Width 8.7” (220 mm) x Length 4.3” (110 mm C6 Width 6.4” (162 mm) x Length 4.5” (114 mm

Thickness

241 mm) x Length 4.13” (104.88 mm

1.2.2.4 Card Stock

Sizes

5 x 8” card: Width 5.0” 8 x 10” car d: Width 8.0 ” (203 mm) x Length 10.0” (254 mm A6 card: Width 4.1” (105 mm) x Length 5.8” (148 mm A5 card: Width 5.8” (148 mm) x Length 8.3” (210 mm

Thickness

Less than 0.0091”

0.23 mm

127 mm) x Length 8.0” (203 mm

0.006”

0.16 mm) to 0.02” (0.52 mm

Weight

12 lb

45 g/m

to 20 lb (75 g/m

Quality or Paper Type

Bond paper envelopes, plain paper envelopes, or air mail envelopes

NOTES:

1. Printing on enve lopes is avail able only at normal temp eratures.

2. Load the longer side of the envelop e horizontally.

Page 19

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

1.2.3 Printable Are a

Cut Sheets

ure 1- 4 in th e right column and the tables on the following page show

Fi printable areas in character mo de and raster

NOTE: Charac t er mode is su pported on ly by th e St y lus COLOR 740.

raphics mode.

Printable Area

Figure 1-4. Printable Area for Cut Sheets

Page 20

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

Table 1-4. Raster Graphics Mode

Paper Size PW (Typical

Paper Width)

A4 8.3” (210 mm) 11.7” (297 mm) 0.12” (3 mm) 0.12” (3 mm) 0.12” (3 mm)

Letter 8.5” (216 mm) 11.0” (279 mm) 0.12” (3 mm) 0.35” (9 mm) 0.12” (3 mm)

B5 7.2” (182 mm) 10.1” (257 mm) 0.12” (3 mm) 0.12” (3 mm) 0.12” (3 mm)

Legal 8.5” (216 mm) 14.0” (356 mm) 0.12” (3 mm) 0.35” (9 mm) 0.12” (3 mm)

Statement 5.5” (139.7 mm) 8.5” (21 6 mm) 0.12” (3 mm) 0.12” (3 mm) 0.l2” (3 mm)

Executive 7.5” (190.5 mm) 10”(254 mm) 0.12” (3 mm) 0.12” (3 mm) 0.12” (3 mm)

PL (Typical

Paper Length)

LM (Minimum

Left Margin)

RM (Minimum

Right Margin)

TM (Minimum

Top Margin

BM (Minimum

Bottom Margin)

0.54” (14 mm)

0.12” (3 mm)

0.54” (14 mm)

0.12” (3 mm)

0.54” (14 mm)

0.12” (3 mm)

0.54” (14 mm)

0.12” (3 mm)

0.54” (14 mm)

0.12” (3 mm)

0.54” (14 mm)

0.12” (3 mm)

Table 1-5. Character Mode (Stylus COLOR 740 only)

Paper Size PW (Typical

Paper Width)

A4 8.3” (210 mm) 11.7” (297 mm) 0.12” (3 mm) 0.12” (3 mm) 0.12” (3 mm)

Letter 8.5” (216 mm) 11.0” (279 mm) 0.12” (3 mm) 0.35” (9 mm) 0.12” (3 mm)

B5 7.2” (182 mm) 10.1” (257 mm) 0.12” (3 mm) 0.12” (3 mm) 0.12” (3 mm)

Legal 8.5” (216 mm 14.0” (356 mm) 0.12” (3 mm) 0.35” (9 mm) 0.12” (3 mm)

Statement 5.5” (139.7 mm) 8.5” (216 mm) 0.12” (3 mm) 0.12” (3 mm) 0.12” (3 mm)

Executive 7.5” (190.5 mm) 10” (254 mm) 0.12” (3 mm) 0.12” (3 mm) 0.12” (3 mm)

PL (Typical

Paper Length)

LM (Minimum

Left Margin)

RM (Minimum

Right Margin)

TM (Minimum

Top Margin)

BM (Minimum

Bottom Margin)

0.54” (14 mm)

0.12” (3 mm)

0.54” (14 mm)

0.12” (3 mm)

0.54” (14 mm)

0.12” (3 mm)

0.54” (14 mm)

0.12” (3 mm)

0.54” (14 mm)

0.12” (3 mm)

0.54” (14 mm)

0.12” (3 mm)

Page 21

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

(

Envelopes

Table 1-6 and Figure 1-5 show t he printable area for envelopes.

Table 1-6. Printable Area for Envelopes

Envelope

Size

#10 0.12” (3 mm) 1.10” (28 mm) 0.12” (3 mm)

DL 0.12” (3 mm) 0.28” (7 mm) 0.12” (3 mm)

C6 0.12” (3 mm) 0.12” (3 mm) 0.12” (3 mm)

LM (Minimum

Left Margin)

RM (Minimum Right Margin)

TM (Minimum

Top Margin)

BM (Minimum

Bottom Margin)

0.54” (14 mm)

0.12” (3 mm)

0.54” (14 mm)

0.12” (3 mm)

0.54” (14 mm)

0.12” (3 mm)

Printable Area

1.2.3.1 Adjust Lever Setting (PG Adjust Lever)

The adjust lever (blue) on the right side under the printer cover needs to be set to the proper position for the paper If

ou find th at th e paper wrin k les during printing, or if smudges appear

on the paper, move the lever to the + position

ardless of paper type.

Table 1-7. Adjust Lever Setting

Lever Position Clearance between head and platen

Plus position 1.04 mm Zero position 1.74 mm (+0.7 mm)

NOTE: A lw ays return th e adjust leve r to th e z ero position af t er you

finish printing. Leaving the lever in the plus position may cause poor pri nt ing in the next printout.

ou pri nt on. (See Tabl e 1 -7.)

toward the rear),

Figure 1-5. Printable Area for Envelopes

Page 22

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

18.3

38.5

51.2

19.8

52.7

27.8

52.7

38.5

51.2

26.3

18.3

38.5

51.2

19.8

52.7

for S tylus C olor 440, 640

for S tylus C olor 740

1.2.4 Ink Cartridge Specifications

Black Ink Cartridge

Table 1-8. Black Ink Cartridge Specifications

Items Specifications

Type Exclusive EPSON ink cart ridges designed for the Stylus COLOR

440, 640, and 740

Print c apa c ity • Stylus COLOR 440 and 640

-540 pages / letter or A4 (ISO/IEC 10561 Letter Patt ern at 360 dpi)

Cartridge life 2 years (sealed in package) / 6 months (out of package) Environmental

conditions

Dimensions •

Weight Cartridge plus ink: 1.06 oz (30 g)

• Stylus COLOR 740

- 900 pages / letter or A4 (ISO/IEC 10561 Letter Pattern at 360 dpi)

• Temperature

- Storage: -4 to 104 °F (-20 to 40 °C) 1 month at 104 °F (40 °C)

- Packing stora ge: -22 to 104 °F (-30 to 40 °C) 1 month at 104 °F (40 °C)

- Transit: -22 to 140 °F (-30 to 60 °C) 1 month at 104 °F (40 °C) 120 hours at 140 °F (60 °C)

• Humidity 5% to 85% (without condensation)

Note: Ink freezes bel ow 27 °F (-3 °C) but it thaws and is usable after 3 hours at 77 °F (25 °C).

Stylus COLOR 440 and 640

0.78” W × 2.1” D × 1.52” H (19.8 mm W × 52.7 mm D ×

38.5 mm H)

Stylus COLOR 740

•

1.09” W × 2.1” D × 1.5” H (27.8 mm W × 52.7 mm D ×

38.5 mm H)

Total ink: 0.58 oz +/- 0. 02 oz (16. 4 +/-0.5 g) Consumable ink weight: more than 0.43 oz (12.1 g)

Figure 1-6. Black Ink Cartridge Dimensions (units in mm)

Page 23

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

Color Ink Cartridge

Table 1-9. Color Ink Cartridge Specifications

Items Specifications

Type Cartridge especially designed for the Stylus COLOR 440, 640

and 740 Colors Cyan, Magenta, Yellow (CMY) Print capacity 300 pages / A4 (360 dpi, 5% duty each color) Cartridge life 2 years (sealed in package) / 6 months (out of package) Environmental

conditions

• Temperature

- Storage: -4 to 104 °F (-20 to 40 °C) 1 month at 104 °F (40 °C)

- Packing storage: -22 to 104 °F (-30 °C to 40 °C) 1 month at 104 °F (40 °C)

- Transit: -22 to 140 °F (-30 °C to 60 °C) 1 month at 104 °F (40 °C) 120 hours at 140 °F (60 °C)

•Humidity 5% to 85% (without condensation)

Note: Ink freezes below 27 °F (-3 °C), but it thaws and i s usable after 3 hours at 77 °F (25 °C).

• Dimensions

1.7” W

2.1” D × 1.5” H (42.9 mm W × 52.7 mm D ×

38.5 mm H)

Weight Cartridge plus ink: 2.36 oz (67 g)

Total ink: 0.45 oz +/- 0. 02 oz (12. 8 +/-0.5 g) Consumable ink weight: mo re than 0.34 oz (9.6 g)

52.7

42.9

41.4

43.2

51.2

38.5

Figure 1-7. Color Ink Cartridge Dimensions (units in mm)

Page 24

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

(

)



1.2.5 Environmental Conditions

Resistance to shock



Temperature



Operatin



Non-operatin

: 50 to 95 °F (10 to 35 °C) (See Figure 1-8.)

:-4 °F to 140 °F (-20 to 60 °C) in shipme nt

containe r

NOTE: 1 month at 104 °F (40 °C) an d 120 hour s a t 1 40 °F (60 °C)



Humidit



Operatin

: 20% to 80% RH without condensation

See Figure 1-8.



Non-operatin shippin

: 5% to 85% RH without condensation and in

container

Hum idity

(% R H )

80%

55%

20%

G uaranteed A re a



Operatin

: 1 G, within 1 ms

X, Y, and Z directions



Non-operatin

: 2 G, within 2 ms

X, Y, and Z directions, in shipment c ontainer



Resistance to vibration



Operating:0.15 G



Non-operatin

:0.50 G

NOTES: 1. When the printer is not in operation , ma k e s ure that the

printhead is capped.

2. During transport, make s ure the printhead is capped and the ink cartridges are installed.

3. If you notice that the printhead is not capped while power is off, turn power on (in k ca rt ridges should be installed). After the printhead has moved to the capping position, turn pow er off again.

4. Ink freezes under 27 °F (-3 °C), but thaws and becomes usable again after 3 hours at 77 °F (25 °C).

10 27

80 95

( C

( F )

Figure 1-8. Temperature / Humidity of Range

Page 25

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

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(

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(

)

(

)

(

)

(

)

1.2.6 Electrical Specifications

120 V Versi o n

Rated volta Input volta Rated fre Input fre Rated current: 0.4 A Power co ns um ption: Approxim ately 16 W (ISO/IEC 10561

Insulation resistan c e: 10M ohms minimum

Dielectric s tr ength: 1000 VAC rms for 1 minute or 1200 VAC rms

220 to 240V Version

Rated volta Input volta Rated fre Input fre Rated current: 0.2 A Power co ns um ption: Approxim ately 16 W (ISO/IEC 10561

Insulation resistan c e: 10M ohms minimum

Dielectric s tr ength: 1500 VAC rms for 1 minute

e: 120 VAC

e range: 99 to 132 VAC

uency range: 50 to 60 Hz

uency range: 49.5 to 60.5 Hz

maximum 0.5 A

Letter patt ern

between AC line and chassis, 500 VDC

for 1 second

e: 220 to 24 0 VAC

e range: 19 8 t o 264 VAC

uency range: 50 to 60 Hz

uency range: 49.5 to 60.5 Hz

maximum 0.3 A

Letter patt ern

500 VDC bet w een AC line and chassis

betwee n AC line and cha s s is

; ENERGY STAR-c ompliant

between AC line and chassis

; ENERGY STAR-c ompliant

1.2.7 Reliability

Total Print Volume

Stylus COLO R 440: 10,000 pages (A4, Letter Stylus COLO R 640: 25,000 pages (A4, Letter Stylus COLO R 740: 75,000 pages (A4, Letter

Printhead Life

Stylus COLOR 440: 2x109 dots/nozzle St

lus COLOR 640: 2x109 dots/nozzle lus COLOR 740: 4x109 dots/nozzle

1.2.8 Sa fe ty App r ov als

120 V Version

Safety standards UL1950 with D3

CSA22.2 No.950 with D3

EMI FCC part 15 subpart B class B

CSA C108.8 class B

220 to 240 V Version

Safet EMI EN55022 (CISPR Pub.22) class B

standard s EN 60950 (VDE, NEMKO

AS/NZS 3548 class B

1.2.9 CE Ma rk in g

220 to 240 V Version

Low Volt a EMC Directive 89/336/EEC: EN55022 Class B

e Directiv e 73/23/EEC :EN60950

EN61000-3-2 EN61000-3-3 EN50082-1 IEC801-2 IEC801-3 IEC801-4

Page 26

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

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(

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1.3 Interface Specifications

A parallel int erf ace is standard on all th ree printers.

1.3.1 Parallel Interface (Forward Channel)

Transmission mode Synchronization Handshaking Signal level Adaptable connector

The BUSY si

h, and rem ains high until the s e s ignals ret urn to their inac t iv e s t at e.

hi The BUSY si



Durin



When the input data buffer is full



When the INIT

nal is set high before setting either ER R OR low or PE

nal is HIGH at these times:

data entry

8-bit parallel, IEEE-1284 compatibilit STROBE pu lse BUSY and ACKLG TTL-com patible le ve l 57-30360

signal is LOW , or during hardware initializat ion

Amphenol) or equivalent

signals

mode

Table 1-10

assi line is used and the return side is connected to the GND si

on the follo w ing page shows the signal and connector pin

nments for the parallel interface. With these signals, a twiste d pair

nal.

NOTE: The forward channel is the mode used to send ordinary da ta ,

such as w hen a print com m and is sent fr om t he compute r t o the print er.



When the re is a printer erro r

The ERROR signal is LOW w hen the printer is in one of th e f ollowing states.



The PE si

Printer hardware error



Paper-o ut error



PaperInk-out error

am error

nal is HIGH during a paper-out error.

fatal err or

See ERROR signal

Page 27

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

Table 1-10. Signal and Connector Pin Assignments for the Parallel Interface

Pin No.

1STROBE

2 to 9

10 ACKNLG

11 BUSY 29 Out

12 PE 28 Out

13 SLCT 28 Out 14 AFXT

31 INIT 30 In

32 ERROR 36 SLIN 30 In Not used.

18 Logic-H — Out Pulled up to +5 V via 3.9K ohm resistor. 35 +5V — Out Pulled up to +5 V via 3.3K ohm resistor.

16,33,

19 to 30

15,34 NC — — Not connected.

Signal

Name

DAT A0 t o DAT A7

Chassis GND

GND — — Signal ground.

Notes: In and Out refer to the direction of signa l f low f rom the printer’s poi nt of view.

An overscore above a signal name means that the signal is active LOW.

Return

GND Pin

19 In

20 to 27 In

28 Out

30 In Not used.

29 Out

— — Chassis ground.

In/Out Functional Descri ption

The strobe pulse. Data is re ad in at the falling edge of this pulse.

The DATA0 through DATA7 signals represent data bits 0 thr ough 7. Each signal is at a HIGH level when dat a is logical 1, and at a LOW level when data is logical 0.

This signal is a negative pulse indicating that the printer can agai n accept data.

A HIGH signal indicates that the printer cannot receive data.

A HIGH signal indicates a paper-out error.

Always HIGH when the printer is powered on.

The falling edge of a negati ve pulse or a LOW signal on this line causes the printer to initialize . Mini mum 50 is necessary.

A LOW signal indicates a printer error condition.

s pulse

Page 28

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

(

1.3.2 Parallel Interface (Reverse Channel)

Transmission mode: Synchronization: Handshaking: Data transmission timing: Signal level:

Adaptable connector: Extensi b ili ty r eq u est:

IEEE-1284 nibble m ode Refer to th e IE EE-1284 s pecification Refer to th e IE EE-1284 s pecification Refer to th e IE EE-1284 s pecification

IEEE-1284 level 1 device

TTL-compatible level 57-30360

Amphenol) or equivalent The printe r responds af f irm ativel the extens ibilit

request values are 00H or

04H, which means:

00H: Request nibb le m ode reverse

channel t ransfer.

04H: Re

uest device ID; return data

usin

nibble mode reverse

channel t ransfer.

when

NOTE: The printer se nds followin g device ID string when requested.

Table 1-11. Details of Device ID

00H 3CH Contents

MGF EPSON Manufacturer CMD ESCPL2, BDC Command system

Stylus COLOR 440

MDL

CLS PRINTER Class

Stylus COLOR 640 Stylus COLOR 740

Model name

NOTES: 1. [00H] denotes a hexadecimal value of zero.

2. The MDL value depends on the EEPROM setting. The model name can be c hanged by ch anging an address in the EEPR OM.

Page 29

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

Table 1-12 shows pin as s ignments for the reverse channel. (Reverse channel is th e m ode in which all data is tra ns f erred from th e printer to the comput er.) For these signals, a twist ed pair line is us ed, and the return sid e is co nnected to th e s i

nal GND .

Table 1-12. Pin Assignments for Reverse Channel

Pin No. Signal Name

1 HostClk 19 In Host clock signal.

2 to 9 Data0 to Data7 20 to 27 In

10 PrtClk 28 Out Printer clock signal. 11 PtrBusy, Data Bit-3,7 29 Out

12 AckData Req, DataBit-2,6 28 Out

13 Xflag, DataBit-1,5 28 Out 14 HostBusy 30 In Host busy signal.

31 INIT 30 In 32 DataAvail

36 1284-Active 30 In 1284 Active Signal 18 Logic-H — Out Pulled up to +5 V via 3.9K ohm resistor. 35 +5 V — Out Pulled up to +5 V via 3.3K ohm resisto r. 17 Chassis GND — — Chassis ground.

16,33, 19 to

15,34 NC — — Not connected.

Notes: In/Out ref ers to the direction of signal flow from the printer’s point of view.

An overscore above a signal name means that signal is active LOW.

GND — —

, DataBit-0,4 29 Out

Return GND

In/Out Functional Description

The DATA0 through DATA7 signals represent data bits 0 through 7. Each signal is at HIGH level when data is logical 1, and at a LOW level when data is logical 0. These signal s are used to transfer th e 1284 extensibility request valu es to the printer.

Printer busy signal and reverse channel tra nsfer data bit 3 or 7.

Acknowledge data request signal and revers e channel transfer data bit 2 or 6.

X-flag signa l and reverse channel tran sfer data bit 1 or

Not used. Data available signal and reverse channel tr ansfer

data bit 0 or 4.

Signal ground.

Page 30

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

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The following are general notes on the parallel interface:



The Return GND Pin c olumn in Tables 1-10 an d 1-12 indica t es a twisted pair return, and is used for all control si

nals exce pt Logic-H,

+5 V, Chassis GND, and NC. The return side is connected to GND

pins 16, 33 , and 19 to 30) in the twisted pair retu rn. Since thes e cables are s hielded, connectin



Interface conditions are based on TTL lo

them to Chassis GND in both the printer and computer.

should be less than 0.2



See Fi



Be sure to perform data transmission onl ACKNLG



You can perform a print t es t wi th out usin

ure 1-9 for the transmission timing of each signal.

and BUSY s ignals are LOW.

the 8-bit da t a s i code and connect them to the ACKNLG

Data

/STROBE

Tsetup

BUSY

ou can reduce electrostatic noise by

ic levels. Rise and fall ti mes

after conf irm ing that the

external equipment. Set

nals (pins 20 th rough 27) to the appro priate word

and STRO BE signals.

Byte Data n

Thold

Tstrb

Byte Data n+1

Tnext

Maximum and Minimum Timing for Data Transmission

Parameter Minimum Maximum

tsetup 500ns —

thold 500ns —

tstb 500ns —

tready 0 —

tbusy — 500ns

tt-out* — 120ns

tt-in** — 200ns treply 0 —

tack 500ns 10us

tnbusy 0 —

tnext 0 —

* Rise and fall time of every output signal. ** Rise and fall time of every input signal. Typical timing for the tack paramete r is s how n in Table 1 -14 below.

Table 1-14. Typical Tack Timing

Parallel Interface Mode Typical Tack Timing

High speed

Normal speed

s (Stylus COLOR 440 and 640)

s (Stylus COLOR 740)

1 4µs (Stylus COLOR 440 and 640)

s (Stylus COLOR740)

/ACKNLG

Tready Tbusy

Treply

Tack Tnbusy

Figure 1-9. Data Transmission Timing for the Forward Channel

Table 1-13.

Page 31

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

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(Sty

The following tables show typical input and output signal levels for the interface

IEEE-1284 lev el 1 devi c e). Signal levels are based o n T T L

standards.

Table 1-15. Typical Output Signal Characteristics

Parameters Minimum Maximum

Voltag e -0.5 V 5.5 V Current 0.32 mA

when V

Capacitance — 50 pF

= 2.4 V

out

when V

12 mA

= 0.4 V

out

Table 1-16. Typical Input Signal Characteristics

Parameters Minimum Maximum

Voltage 0.8 V 2.0 V Current 0.32 mA

when V

Capacitance — 50 pF

= 2.0 V

12 mA

when V

= 0.8 V

NOTE: The input and output signals are active-h igh; the logic lev el is

conside red HIGH at 3. 0 v olt s or m ore and LOW at 2.0 V or less. The receiver shall provide an impedance equivalent to

7.5K ohm to ground.

1.3.2.1 Host Data Transfer Timeout Prevention

1.3.2.2 Interface Selection



Manual Selection: One of two interfac es ca n be selecte d t hrou mode.



Automatic Selection

lus COLO R 740 only): Automatic interface selection is enabled in the default settin In automatic interfac e se lection mod e, the printer is initialized to the idle state when it is po w ered on. The printer sca ns t he interface s to determ ine which int erf ace receiv es data first, then selects th at interfa ce fo r fu rt her data trans m ission. When the ho st s to ps data transfer and the pri nt er is in stand-b

for several seconds, the printer ret urns to the idle s t at e. T he process is repeated ea ch ti m e the print er is powered o n.

The follo w ing notes explain how the selection of one interface affects the cond it ion of other int erfaces:



When an interface ot her than the parallel inte rf ac e is selected, the parallel interface set to LOW, blockin response from the 1284 Active si for the host, which re

oes into the BUSY state. The LH signal is

the power supply and preventing a

nal. This makes it necessary

uires reverse tr ansfer of data, to ch eck the

LH state.

h the default setting

mode.

Generally, hosts abandon data transfer to peripherals when a peripheral is BUSY continuousl time-out, the printer receives data ver even if it is bu s buffer dro ps under several hundred b BUSY con t inuousl

for dozens of seconds. To prevent this kind of

slowly, several bytes per minute,

. This slo w down starts wh en the remainder of the input

tes. In add it ion, the printe r is

when the inp ut buffer is full.



When an interface other than the serial interface is selected, the serial interface sets the DTR si



When th e printer is init ialized or returned to the idle state, th e paralle l int erface sets the DTR si the Main St at us Re

oes into th e ready state. The serial interf ace

nal SPACE (LOW) and reset s th e of f -line bit of

ister (MNSTS) to an optio nal interface .

nal MARK.

Page 32

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

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)

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)

Pin #1

Pin #2

Pin #3

Pin #4

1.3.3 Serial Interface (Stylus COLOR 740 only)

Standard Synchronization Bit rate Handshaking Word format

Connector Cable

Table 1-17. Connector Pin Assignments for the Serial Interface

Pin No. Signal Name I/O Functional Description

1 SCLK Out Synchronous clock signal 2 CTS In Cl ear to send 3 TXD- Out Transmit data (-) 4 SG In Signal ground 5 RXD- I n Receive data (-) 6 TXD+ Out Balanced transmit data (+) 7 DTR Out Data terminal ready 8 RXD+ In Balanced recei ve data (+)

RS-423 c ompatible S

nchronous

Approximatel

1800 Kb ps X-ON/X-OFF, DTR protocol Data Bit= 8 bit s Parit

Bit= None Start Bit= 1 bit Stop Bit= 1 bit 8-pin mini-circular c onnector Apple S

recommended

stem Peripheral-8 Cable

1.3.3.1 USB Interface (Stylus COLOR 740 only)

Standard

Bit rate Data encoding Connector Cable length

Table 1-19. Connector Pin Assignments for the USB Interface

Pin No. Signal Name I/O Functional Description

1VCC — 2 -Data Bi-D Data 3+DataBi-D

4 Ground — Cable ground

Universal Serial Bus Specifications Rev. 1. 0 Universal Serial Bus Device Class Definition for Printin

Device Version 1.0 12 Mbps NRZI USB Series B 2 meters

recommended

Cable power; maximum power consumption is 100 mA

Data; pulled up to +3.3 V via a 1.5K ohm resistor

Table 1-18. X-On/X-Off and DTR Status

State Buffer Space X-ON/X-OFF DTR

Busy Less than 3072 bytes Sen d X-OFF code OFF Ready More than 5120 bytes Send X-ON code ON

Figure 1-10. USB Pin Assignments

Page 33

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

1.4 Control Panel

Since the printer drivers f or t he Stylus COLOR 440, 640, and 740 control man control bu ttons. Ther e are two non-lock t button, and four LEDs. Fi panels.

settings and functions, these printers do not require many

pe buttons, one lock type

ure 1-11 sh ow s t he layout of the co nt rol

Paper Out LED

Ink Out(Bk)LED

Ink Out(CMY)LED

Cleaning Switch (Ink maintenance)

Load/Eject Switch

Power on Switch

Power LED

Stylus Color 440, 640

1.4.1 Ind ica to r s (LEDs )

(1) Power

hts when the Opera t e s w it c h is ON and AC power is supplied,

Li and flas hes when the printer is rece iv in mainte nance oper at ion such as cleanin

(2) Paper Ou t

hts when the printer is out of paper, and flashes w hen there is a

Li paper

(3) Black Ink Out

Li ink is low.

(4) Color Ink Out

Li ink is low.

am.

hts when the black ink ca rt ridge is out of ink, and flashes when

hts when the color ink c art ridge is out of ink , and flashes w hen

data or perf orming a

the printhead.

Stylus Color 740

Figure 1-11. Control Panels

Page 34

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

1.4.2 Control Panel Functions

Tables 1- 19 t hrough 1-21 desc ribe control panel fun c tio ns .

Table 1-20. Control Panel Functions

Button Function

Load/Eject (Hold at least 2

seconds) Load/Eject (Press for less than

2 seconds.) Cleaning

(Hold at least 2 seconds)

Cleaning (Press for less than

2 seconds)

1. Starts the ink cartridge r eplacement sequence.

1. Loads or ejects the paper.

2. If the cartridge is in the ink change position, ret urns it to the capping position.

1. Starts the printhead cleani ng sequence.

2. When the printe r is low on ink or out of ink (either cartridge), starts the ink cartridge replacement sequence.

1. If the carriage is in the ink ca rt ridge ch ange posit ion, return s

it to the capping position.

Table 1-21. Control Panel Functions at Power On

Switch Function

Load/Eject 1. Starts status printing. 1

Cleaning

Load/Eject

Cleaning

Stylus COLOR 440 and 640:

Changes the code page. 2

Stylus COLOR 740:

Enters the default setting mode. 3 Enters the EEPROM Reset mode. (The Load/Eject LED

flashes for a few seconds.) (Used only to clear a maintenance error.)

NOTES: 1. Prints the firmware version, ink counter value, and nozzle

check pattern.

during Normal Printer Use

Table 1-22. Control Panel Functions in the EEPROM Reset Mode

Button Function

Cleaning Resets the EEPROM.

1. After the Load/Eject LED has been flashing for about 2 seconds, press and hold down the Cleaning button for 10 seconds.

Stylus COLOR 440 and 640

After 10 seconds, both the Bl ack Ink Out and Color Ink Out

LEDs come ON simultaneously.

Stylus COLOR 740

After 10 seconds, the Load/Eject, Black Ink Out and Color Ink Out LEDs all

2. Do one of the fo l lowi n g:

Stylus COLOR 440 and 640

After you confirm that both the Black Ink Out and Color Ink Out LEDs are ON, release the Cleaning button. The print er resets certain addresses in the EEPROM as it begins the initia li zation process.

Stylus COLOR 740

After you confirm that all 3 LEDs are Cleaning but ton. The prin ter resets certain addresses i n the EEPROM as it begins the initializati on process.

flash

simultaneously.

flashing

, release the

NOTES: 1. Before you press the Load / Eject button, be sure you are

in EEPROM reset mo de (see Table 1-20)

2. The f ollowing ad dresses are res et in EEPROM Reset Mode: timer IC (power-off timer), ink counter, and interfa ce s election (int erf ac e selectio n is res et to Auto)

3. If you repeat the EEPROM reset operation, it reset s the EEPROM addre sses but does not necessarily initialize the EEPR OM. Whe th er or not the EEPROM is initialized depen ds on the power-off time m onitored by the tim er IC.

2. Code pages for th e St y lus COLOR 440 and 640 are not available.

3. The us er c an use the parameter lis t to se lec t s et t ings for both the st andard and N LSP version of the Stylus COLOR 74 0.

Page 35

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

1.4.3 LED Indicators and Printer States

Table 1-23 describes t he appearance of the LE D indicators during various pr int er states. Y ou can use the ta ble below to determine t he nature of a printer probl em and how to so lv e it .

Table 1-23. Printer Condition and LED Status

Printer State

Power on ————9 Ink sequence mode On — — — 6 Ink cartridge replacement mode Flashing — — — 5 Data processing Flashing — — — 8 Paper out Flashing — — On 4 Paper jam — — — Flashing 3 No ink cartri dge or i n k out (black) — On — — 7 Ink low (black) — Flashing — — 7 No ink cartridge or i nk out (color) — — On — 7 Ink low (color) — — Flashing — 7 Enter EEPROM reset — ON (for 3 seconds) — Maintenance request Flashing Flashing Flashing Flashing 2 Fatal error Flashing On On Flashing 1

Power Ink Out (Black) Ink Out (Color) Paper Out

Indicator Sta tus

Priority

Page 36

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

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ging

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1.5 Error Conditions

When the error conditions described in the following sections occur, th e printer stops acceptin and the Bus information on the st at us of th e LED indicat ors durin states.

signal to HIGH , and stops pr int ing. See Sec ti on 1.4.3 fo r

1.5.1 Ink Out

When the printer is almo s t o ut of any color of ink, th e appropriat e Ink Out indicator When the printer is out of either ink co lor, it stops pri nt in appropr iat e I nk Out indicat or remains on. In s ta ll a new ink car tr id this time.

CAUTION

black or co lor) flashes and the printer k eeps on prin t ing.

Never reinstall an ink cartridge that has been removed from the printer. Installing an old ink cartridge interferes with the printer’s ink level detection capability and may cause serious printing problems.

data, sets the interface ERROR signal to LOW

various err or

and the

e at

2. As lon cannot ent er the printhead. Howe v er, if an old ink ca rt rid removed from the printer, an full bubbles will form. If thickened ink the ink pa t h or nozzle and cause ser ious printhead dama

3. Normally, the ink consumption counter is reset when the ink cartrid unnecessaril value, a nd the printer m a ink cartrid

as the ink ca rt ridge remains ins t alled in the pr int er, air

e is

air entering the cartridge can never be

absorbed into the ink. As a result, the ink w ill t hic k en and

ets into the pri nt head, it can clog

e is removed. If an ink ca rt ridge is removed and reins t alled

, the ink co ns um ption counter will hav e t he wrong

keep printing even though the inksta lled

e is empty. This can damage the printh ead.

1.5.2 Paper Out

When the printer is printing and fails to lo ad a sheet of p aper after all power-on operat ions press the Load/E indicat es a paper out er ror.

including timer clearing) are done, or after you

ect button and the pape r fa ils to load, the print er

1.5.3 Pa pe r Jam

Here’s why:

1. Once the ca rt rid the printhead, and bubbles that form can prevent the printhead from dischar durin ink itself, si nc e t he ink in the ca rt rid the production process. However, the ink’s abilit for onl

installation of a new ink c art ridge can be absorbed in t o th e

about one hour after th e c artridge has been ins t alled.

e has been removed, air enters the ca rt ridge and

ink properly. On the other hand, the air that ente rs

e has been de-aerated during

to absorb air lasts

When th e printer cannot eject a sheet of paper after printing, or when the Load/ E indicat es a paper

ect butto n on the contro l panel is press ed, the print er

am error.

Page 37

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

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1.5.4 No Ink Cartridge

The following can be reas ons for the printer to indic at e a No Ink Cartrid

1. The printe r is bein

e error:

turned on for the first time. This is a normal conditio n, and the printer clears the error state as s oon as an ink cartridge is installed.

2. Ink cartrid occur if the carria procedure, or if the carria cartrid

ain correctly, the prin te r c lears the error c ondition.

3. There is a problem with the carria If the error oc c urs when th e ink c artrid correctl indicate s a No In k Ca rt rid

e replacement is pe rf orm ed incorr ec t ly. This error m ay

e is moved during the cartridge repla c em ent

e returns to the home position before the

e is installed. When ink cartridge replacem ent is perfo rm ed

e sensor or with the printer itself.

e has been ins t alled

, or if the printe r so m et im es prints no rm ally and sometimes

e error, th e C R se ns or or printe r m ay

need to be repaired.

1.5.5 Maintenance Request

Since 1 c ounter poin t e followin

EPSON Stylus COLOR 440 420 ml EPSON Stylus COLOR 640 396 ml EPSON Stylus COLOR 740 818 ml

Printer Maximum Ink Capacity

uals 0.02 m l of ink , ink ca pacity is set at the

CAUTION

When you print the A4 nozzle check pattern after completing repairs, the print out shows you the cur rent value of the total ink counter and whether the ink is discharging properly from all the nozzles. Make sure that the value of the total ink counter is acceptable. If the value is too high (if it is close to or gre ate r than t he maximum value), it may be necessary to clear the EEPROM and replace the waste ink pad.

1.5.6 Fatal Errors

The follo w ing are fatal er rors :

When t he t ot al quantity of ink released by cleaning and flushing reaches the threshold value, a maintenance re stops print in

. You need t o replace the waste ink pad in the prin t er

uest error occurs and the printer

case. A print er counter m onitors the am ount of ink that has been absorbed by the waste in k pad. The coun t er uses a point system that corresponds to the amount of ink that has been used. The maximum capacit

points

EPSON Stylus COLOR 440 21000 EPSON Stylus COLOR 640 19800 EPSON Stylus COLOR 740 40900

of the waste ink pad is set at the following

Printer Maximum Counter Points

maximum counter



Carria carria belt tension malfunction, not enou

e Contro l Error: This e rror may be cause d by a misaligned

uide shaft, a home position sensor malfunction, a timing

h lubricant on the carriage guide

shaft, or ot her problem s .



CG Access Error: This error occurs if the carria the ink cart rid se

uence.

e replacem ent positio n during the replac em ent

e does not move to

Page 38

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

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(a)

(b)

(c)

(d)

(a)

(b) Ej

(c)

(d)

(e)

(a)

(b)

)

1.6 Pr in te r In itialization

Stylus COLOR 440, 640, and 740 have three kinds of initialization methods, as described below:

Power-on initialization

Power-on initialization occurs when printer rec eiv es the cold res et c om mand Power-on initializat ion performs t he followin

Initializes the printer mechanism. Clears the input data buf f er.

Clears the print buffe r.

Sets the default values.

Operator initialization

Operator initializat ion occurs when seconds af t er it was turned off, or when the printer receives th e I N IT

nal (negative pulse) from the parallel interface. Operator initialization

si performs t he followin

acti ons:

ou turn the pri nt er on, or when the

remote RS command).

actions:

ou turn the printer on less t han 10

1.7 Initialization Settings

The settings below take effect when the Stylus COL OR 440, 640, or 740 are init ialized. If the us er chan panel bu t to ns , th e D ef ault Settin settin

s will take effect instead of the facto ry settings.



e position: Page headi ng location fo r c urrent page

Pa Line spac in

ht margin positio n: 80 lines

Ri Left mar Charac t er pitch: 10 cpi Printin

: 1/6 inch

in position: First line

mode: Text mode (not raster graphics mode

es any settings using the control

mode, or remote commands, those

Caps the printhead.

ects the p aper.

Clears the input data buffer.

Clears the print buffer . Sets the default values.

Software initialization

Software initializat ion occurs when the prin t er receives the ESC @ command. Software initializat ion performs the followin

Clears the print buffer . Sets the default values.

actions:

Page 39

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

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1.8 Main Components

The main components of the Stylus COLOR 440, 640, and 740 are listed below. the lower h ousin

1) Upper housin

2) Printer m ec hanism 3

Note that t he bottom of th e printer mec hanism se rv es as

for all three pr int ers.

Main con t rol board

lus COLO R 440: C206 MAIN-B board,

C255 MAIN board *

Stylus COLO R 640: C256 MAIN board

lus COLO R 740: C257 MAIN board

Power s upply board

lus COLO R 440: C206 PSB /P SE board

lus COLO R 640: C206 PSB /P SE board

St St

lus COLO R 740: C257 PSB /P SE board

Contro l panel board

lus COLO R 440: C206 PNL board

St St

lus COLO R 640: C206 PNL board lus COLO R 740: C209 PNL board

1.8.1 Printer Mechanism

Like the printer mech anism for ea rlier printers s uc h as the Stylus COLOR 600, the paper feed mechanism and the ink pump. However, the ink pump operates onl when the carria approp riate direct ion.

Another important f eature is tha t the printhea d is one unit, combinin both blac k and color ink nozzles.

e is in its home position and the PF motor is turning the

motor drives both the paper feed

* The C255 MAIN board will eventually replace the C206 MAIN-B.

Page 40

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

1.8.2 C206 MAIN-B Board (Stylus COLOR 440)

The C206 M AI N -B board co nt rols the operation of the printer mechanism and data processin This boar d w ill ev entuall

be replaced by the C255 MAIN board.

The C206 MAIN-B board consists of the following major components:

IC 14(PF)IC 15(C R )

CN6CN7

CN10

IC 7(H ead)

CN8

EEPRO M (IC 1 1 )

Q 7,Q 9(H ead)

operations for the Stylus COLOR 440.

IC 3 (P -R O M )

CN1

IC 1 (C P U )

IC 2 (A s ic )

B a tt 1

IC 4 (4 M D -R A M )

CN3

CN5

CN4

CN11

1.8.3 C256 MAIN Board (Stylus COLOR 640)

The C25 6 M AIN board c ontrols the operation of t he printer mec hanism and data processin of the followin

IC 15(C R )

CN10

IC 7(H ead)

operations fo r t he Stylus COLOR 640. It consists

major components.

IC 14(PF)

CN6CN7

CN8

Q 7,Q 9(H ead)

CN1

IC 1 (C P U )

IC 2 (A s ic )

IC 16(P-R O M )

CN2

B a tt 1

IC 6

IC 5 (4 M D -R A M )

Figure 1-13. C256 MAIN board

CN3

CN5

CN4

CN11

Figure 1-12. C206 MAIN-B board

Page 41

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

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1.8.4 C257 MAIN Board (Stylus COLOR 740)

The C257 M AI N board controls the operation of the printer mec hanism and data processin of the follow in

HT1

IC 1 2 IC 1 3

(P F D riv e )

operations for the Stylus COLOR 640. It consists

major compon ents.

IC 14(H ead)

CN9

CN7

IC 1 5 (R e g u la to r)

CN8

IC11(CR)

IC 6 (C G :o n ly fo r N L S P )

IC 3 (P -R O M )

CN3

CN1

B a tt 1

IC 4 IC 5

(4M DRAMx2)

IC 1 (C P U )

IC 2 (A s ic )

IC 7(EEPRO M

CN2

CN3

CN5

CN4

CN11

Figure 1-14. C257 MAIN Board

1.8.5 Powe r Sup pl y Board C206 PSB/PSE (Stylus COLOR 440 and 640) C257 PSB/PSE (Stylus COLOR 740)

The pow er supply boards for the Stylus COLOR 440, 640 and 740 emplo volta can be su pplied to the printer for at least 30 seconds after po w er is turned off. Therefore, even when the user makes a mistake examp le, tu rns off power in the middle of a print ensures that the printhead is capped and prevents ink from clo nozzl e plate.

a switching regulator me th od to supply stabl e logic and power

es. Because thes e boards cont ain a time delay circuit, electrici ty

for

, this mechanism

Q1(FET)

CN1

Fuse(F1)

Trans(T1)

PC1

C51

CN2

the

Filter(L1)

C11

IC51

Figure 1-15. C206/C257 PSB/PSE board

Page 42

EPSON Stylus COLOR 440, 640, and 740 Chapter 1 Product Description

1.8.6 C206 PNL Board (Stylus COLOR 440 and 640)

The C206 PNL (panel) board is loc at ed in t he pa nel ho usi ng on the front of the printer. It consists of 3 buttons, 4 LEDs, and 1 connector.

LED0

LED1

LED2

SW2

SW0

Figure 1-16. C206 PNL board

LED4

SW1

1.8.7 C209 PNL Board (Stylus COLOR 740)

The C209 PNL (panel) board is located in the panel housing on the fr on t of the prin t er. It c onsists of 3 b ut to ns , 4 LE Ds, and 1 connector.

LED0

LED4

LED1

LED2

SW2

SW0

SW1

CN1

Figure 1-17. C209 PNL Board

Page 43

OPERATING PRINCIPLES





Page 44

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

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2.1 Printer Mechanism

The printe r m ec hanism inc ludes all the m echanical components that enable pri nt in

to take place. These components include the printhead

and carriage (CR) unit, the paper feed (PF) and paper eject rollers, the auto-sheet feeder printhead cleanin

ASF), and the p um p unit which is us ed in

operations .

A uto-S heet Feeder (AS F)

Paper Load

Trigger

Tim ing Belt

Paper Feed

Motor

Like some previous versions of EPSON ink jet printers, t he paper fee d motor in the St feedin

, but also t o pump ink and drive the auto-sheet fe eder. The direction of the paper feed motor, alon determines which operations are performed. Fi

lus CO LOR 440, 64 0, and 74 0 is us ed no t o nly for paper

with the positi on of the car riage,

ure 2-1 shows how the

main components of the printer mechanism interact.

Carriage Unit

(P rinthead)

C apping

M echanism

C a rria g e M o to r

PF Roller

Pum p

Figure 2-1. Printer Mechanism Block Diagram

Page 45

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

(Cy

(

)

(

)

(

)

gging

(

2.1.1 Printhead

The printh ead of the Stylus COL OR 440, 640, and 740 combines the black and CMY below, the nozzle co nf i



lus COLO R 440:

St Black Nozzle: 64 nozzles CMY Nozzle: 21 nozzles per color (90 dpi x 1 row



lus COLO R 640: Black Nozzle: 64 nozzles CMY Nozzle: 32 nozzles per color (90 dpi x 1 row



lus COLO R 740: Black Noz z le: 144 no z z les CMY Nozzle: 48 nozzles per color (120 dpi x 1 row

The Stylus COLOR 640 and 740 print at the highest resolution (720 x 1440 dpi

, while the Stylus Color 44 0 prints at 720 x 720 dpi.

The printh ead uses an on-dema nd MACH-t Refer to Fi confi

ure 1-1, Figure 1-2, and Figure 1-3 for the nozzle

uration. In or der to correc t manufactu ring variation s in th e piezo element s u s ed f or e head volta

e ID to the printer whenever you replace the printhead, main board, or printer mechanism. The head volta side of the printhead , an d is s to red in the EE PR OM on the printer’s main board. You can input the ID to the printer by using the adjustment

ram des c ribed in “Using the Adjustment Program” in Chapter 5,

pro

Adjustments

an, Magenta, Y ellow) heads in one unit. As shown

urations are different f or each model:

90 dpi x 2 row s st aggered

120 dpi x 3 row s s t aggered

pe ink deliv ery system.

ecting ink from the nozzles, you must input the

e ID is marked on the

Printing Process

In Figure 2-2, the ink c art ridge sensor de te c ts t he presence of the ink cartrid ink flows out of t he c artrid filter. The filter prevents dust or dirt from clo causin until it is read elements board, the PZTs compress the top of the ink cavit throu

e; note that the sensor’s position differs between models. After

e through the needle, it passes th rough a

the ink nozz les and

missing dots or ink deflection. The ink cavity then stores the in k

to be discharged. This is accomplished by piezo electric

PZTs). In response to signals from t he driver on the m ain

, causing ink to eject

h the nozzle plate on the bottom of the printhead.

N o z z le S e le c to r B o a r d

Ink Cartridge S ensor

(S tylus C O LO R 440,640)

Ink Cartridge Sensor (S tylus C O LO R 740)

N eedle

(In k C a rtrid g e )

PZT

F ilte r

ozzle P late

In k C a v ity

Figure 2-2. Printhead Sectional Drawing

Page 46

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

)

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)

The following figures show s ec t ional drawi ngs of the printhead while waitin



to print an d during printing (normal state and ejecting state).

Normal State:

Durin the ducts between the ink cavit

the normal state, the PZT elements do no t mov e and ink fills

and the nozzles. (Refer to Figure

Ink Course

PZT

Cavity

2-3.



Ejecting State:

The printh ead is desi throu c

h thousan ds of print cycles each second. During each print

cle, the main board transmits data to the nozzle selector IC

ned to operate at a high frequency, and goes

Nozzle

Nozzle Plate

IR2C72C), which is located on the printhead. This data determines which PZTs are to be actuated in the current c time, the main board Durin volta causes ink to e Fi

each print cycle, the noz z le s elector applies this dr iv e

e to specific PZTs, as determined by the print data. This

ect from th e nozzles in a specific patt ern. (See

ure 2-4.

enerates a high-frequency drive voltage.

cle. At the same

Figure 2-3. Printhead - Normal State

Figure 2-4. Printhead - Ejecting State

Page 47

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

Rotor

Coils

2.1.2 Carriage Mechanism

The carriage (CR) motor moves the carriage, which holds the printhead, alon

the carriage guide shaft. Unlike the paper feed motor, the carria advance th e c arria motor is a 4-phase, 200-pole stepper motor. Its specifications are shown in the table bel ow .

The carria 2-2, and W1-2 phase drive methods. The St 1-2, W1-2 , 2 W 1-2, and 4W1-2 phase driv e methods . Diff erent phase drive methods are used for differ ent printer fu nc t ions, as show n below.

e motor is ca pable of Micr o-Step cont rol. (This means it can

e in increm ents of 1/360 of an inch.) The carriage

Table 2-1. Carriage Motor Specifications

Items Description

Motor type 4-phase/200-pole stepper motor Drive voltage 42 VDC ± 5% Internal coil resistance 7.8 ohms ± 10% (per phase under 25 °C

environment) Driving speed (frequency) 5 cps (60 Hz) to 340 cps (4080 Hz) Control method Bi-polar drive

e motor for the Stylus COLOR 440 and 640 is driven by 1-2,

lus CO LOR 740 us es 2- 2,

Table 2-3. Phase Drive Methods (Stylus COLOR 740)

Printing mode

High-speed skip 340 4080 Normal printing 200 2400 W1-2, 2-2 phase drive

Capping 80 960 2W1-2, 2-2 phase drive Wiping 40 480 2W1-2, 2-2 phase drive Opening the bleed

valve Uncapping 5 60 4W1-2, 2-2 phase drive

Drive Speed

[CPS]

20 240 4W1-2, 2-2 phase drive

Drive frequency

[PPS]

Drive method

W1-2, 2-2,1-2 phase drive*

Table 2-2. Phase Drive Methods (Stylus COLOR 440, 640)

Printer function

High-speed skip 340 4080 Normal printing 200 2400 W1-2, 2-2 phase drive

Capping 80 960 W1-2, 2-2 phase drive Wiping 40 480 W1-2, 2-2 phase drive Opening the bleed

valve Uncapping 5 60 W1-2, 2-2 phase drive

Driv e S peed

[CPS]

20 240 W1-2, 2-2 phase drive

Drive frequency

[PPS]

Drive method

W1-2, 2-2,1-2 phase drive

Figure 2-5. CR Motor Circuit Diagram

Page 48

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

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ge g

2.1.3 Platen Gap and Parallelism Adjustment Mechanisms

The platen gap (PG) adjustment lev er changes the distance between the printh ead and the p lat en. between 1.04 mm and 1.74 mm. Normall forward p os it ion, or narro w printin to increase the

All media Front 0 mm

If you experience print problems

, such as paper curl, the user can move the lever toward the rear

ap.

Table 2-4.

Paper Lever Position PG adjustment value

Platen Gap Adjustment Lever Settings

Rear 0.7 mm

See Figure 2-6.) The distance can vary

, the lever is k ept in the

ap setting. In case of problems during

(1.04 mm between head and platen)

(1.74 mm between head and platen)

The parallelism adjustment levers, mounted on the left and right ends of the carria

uide shaft, adjust alignment be tween the pla t en and the

uide shaf t . Pa rallelism m us t be c hecked and adjusted whenever a

new

uide shaf t is installed on t he printer mechanism, whether during the produc t ion process or repair. For det ails, see “

Adjustment” in Chapte r 5,

Adjustments

Parallelism

Paper Feed Motor

Eject Roller

Paper guide(Front)

Carriage Home Position Sensor

PF Roller

Timing Belt

PG Lever

Carriage Unit

Front

Bushing

Figure 2-6. Carriage Mechanism (Top View)

Carriage Motor

Rear

Parallelism Adjust Lever

Carriage Guide Shaft

Page 49

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

g by

2.1.4 Carriage Lock Mechanism

The carriage lock mec hanism prev ents the pr int head from becoming uncapped, which could happen beca us e of vib rat ion durin mishandlin

users. If the printhead is uncapped fo r a long time, ink on the print head surfac e dries out and becomes t hick. This can keep the nozzle from discharging ink. To prevent this, the printer locks the carria



e under the f ollowing conditio ns :

After power-off:

If the powe r is tu rned off durin

printing or any other operation, the

printer initializes and then locks the carria

After power-on:

The printer locks the carria automatic power-on cl eanin

e after the power is tur ned on and

is completed.

After ejecting the paper:

If the Load/E data is bein locks the carria Load/E not perfor m a c arria

ect button is pressed during printing and no furth er

receive d by the printe r, th e printer ejects the paper,

e, and goes into standby. However, if the

ect button is pressed for paper loading only, the printer does

e lock.

e in the hom e position.

trans port or

2.1.5 Pa pe r Fe ed Mot or

The paper feed (PF) motor powers not only the paper feed mechanism, but also th e pump mech anism that is us ed for printhead clean in

pe of motor used is a 4-phase hybrid pulse m ot or. This mak es it

t possible to use the same motor to perform both hi operations for a var iet

of paper fe eding and ink pumping tasks.

h- and low-speed

The PF motor for the Stylus COLO R 440 and 640 us es 2-2 and 1-2 phase drive methods, whereas the St W1-2, 1-2 and 2-2 phase drive methods. The followin

lus COLO R 740 uses 2W 1-2,

tables show the

PF motor specificat ions.

Table 2-5.

Item Description

Motor type 4-phase/48-pole steppe r motor Drive voltage 42 VDC ± 5% Coil resistance 7 ohms ± 10% (each coil, at 25 °C) Drive frequency 100 to 1990 Hz Control method Bi-polar drive

Table 2-6.

Item Description

Motor type 4-phase/200-p ole stepper motor Drive voltage 42 VDC ± 5% Coil resistance 8.8 ohms ± 10% (each coil, at 25 °C) Drive frequency 100 to 3240 Hz Control method Bi-polar drive

PF Motor Specifications (Stylus Color 440, 640)

PF Motor Specifications (Stylus Color 740)

. The

Page 50

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

2.1.6 Paper Handling

Paper ha ndling on the Stylus COLOR 440, 640, and 740 is per fo rm ed b

the automatic sheet feeder (ASF) and paper feed mechanisms. The ASF is desi fed into the printer at a time. After the ASF has int roduced a sin

ned to prevent more than one sheet of paper from being

le sheet into the printer, the paper feed mechanism takes over. It manages the pape r during printing, and also ejects the page when printin

is complete.

Since the paper feed mechanism and ASF share the same motor, the printer needs a wa This is done b

of transmitting power to th e ASF during loading.

the ASF transmission.

ASF transmission

Normally, when the the PF motor is running, it turns only the gears on the ri These

When the Load/Eject switch is p res s ed or the prin te r receives instructions to load a new sheet of paper, the carria wa then push es a axle as the platen rolle r drive mesh with the ASF roller transmission drives the ASF durin

ht-hand s ide of the ASF tr ansmission, as shown in Figure 2-7.

ears incl ude the PF roller drive gear and the eject roller driv e

ear, which are both part s of th e paper feed m ec hanism.

e unit moves all the

to the left an d presses against the sheet feeder clutch. The clutch

ainst the sl iding gear, which is mounted on the same

ear. This c aus es the slidi ng gear to

ears. In this way, the PF motor

paper load ing.

ASF Roller Drive Gear

Sliding Gear (Hidden)

ASF Roller Transmission Gears

PF Roller Shaft

Figure 2-7. ASF Transmission

Sheet Feeder Clutch

Eject Roller Drive Gear

Eject Roller Transmission Gear

PF Motor Pinion Gear

PF Roller Transmission Gear

PF Roller Drive Gear

Page 51

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

Automatic Sheet Feeder (ASF)

When the us er s ets a stack of paper in the pr int er, it rests on to p of th e upper led

e of the

pad

, shown in Figure 2-8. The st ac k rem ains on the pad while individual sh eets are fed in t o th e paper path . Som etimes, howeve r, more than one sh eet of paper slips into the paper path dur ing printin

. If this is not corrected, it can cause paper to jam when the printer trie s to load the next sheet of paper. To preve nt th is , the PF motor rotates backwards at the beginning of each pa per feed cycle. This causes the cam to rotate counterclockwise, catch the paper return lever, and lif t it upward, as sh ow n in the figure at right. At the same time, the hopper and the pad are pushed backwards, awa cut paper loadin As the cam continues to rotate, an paper path is cau

roller, leaving a gap to prev ent frict ion wi t h the paper.

paper that has slipped into the

ht by the return le v er and return ed t o it s proper

from the D-

position on top of the pad. When the PF motor resumes normal forward motion, the cam and the

D-cut roller rotate clo ckw ise, allow ing the paper ret urn lever to m ov e downwa rd and clear the paper pat h. At th e s am e time, the hopper and the pad mo v e f orw ard and pres s t he paper against the D -c ut roller. As the D-cut ro ller continues to turn, it d raw s t he top sheet of paper off the stack and feeds it into the printer, until the roller has turned so that its flat side is pa rallel to the paper. At this point, the pa per is full and onl

the paper pinch roller rem ains in cont ac t wi th th e paper. This

loaded

is the ASF’s home position. A sensor detects this position and causes the printe r to dis engage power from the ASF.

D-Cut Roller Cam

Paper R eturn

Lever

H opper

H opper Spring

Pad S pring

Pinch R oller

Paper Stack

Pad

Figure 2-8. ASF Unit Operation

Page 52

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

g (

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Paper Feed Mechanism

When the ASF loads pap er into the print er, the PF an d pinch roller s receive it. Th es e rollers in turn move the paper across th e platen, where printing takes place, and feed it out through the eject rollers. The

ect roller is not c hed and set bac k fro m the low er eject roller at a 5-

top e

ree angle toward the platen. This compensates for paper curl and

de allows the t railin without bendin

Paper

top) edge of the pap er t o pass under t he printhea d

Notched Eject Roller

Eject Roller

Printhead

5 degrees

Pinch R oller

PF Roller

Platen

2.1.7 Ink System

The ink system consists of the following:



ink cartrid



printhead cappin



carria



cleanin



ink pump



waste ink drain pad

Althou

h the PF mot or drives bot h th e paper feed m ec hanism and the ink pum p, th e disen alwa

e these systems. However, this does not mean the pump is

s pumping ink. For the ink pump to operate, the p rint head must be capped b the PF motor must turn the pump in the appropriate direction the pum p drive roller s

Eject R oller Transm issionG ear

mechanism

e lock

blade

ear linkage contains no special mechanism to

the capping mechanism (to create a vacuum seal) and

PF R oller D rive G ear

Eject R oller D rive G ear

C arriage Lock

to engage

Figure 2-9. Paper Feed Mechanism

C leaning Blade

P F M o to r Pinion G ear

Pum p

C apping U nit

Figure 2-10. Ink System Mechanism

Page 53

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

ying

ging



Head Cleaning Operations

Suctioning

The printe r performs a va riety of tasks to keep the printhead clean and to keep ink f rom dr

out on the printhead’s surface. These tasks

include:



Rubbing and Wiping

Rubbin and dirt on t he printhea d. Th is helps mainta in normal ink e

and wiping are perform ed prior to suc t ioning to elimina te dus t

ection and ensures tha t a fir m se al can be obtained whe n t he printhea d is ca pped during suctioning.

Rubbing and wiping occur when the printhead passes over the cleaning blade, wh ic h c an be extended into the path of the p rint head or withdrawn out of its way. To learn how this works, see “Pump

Mechanism” on page45.

The cl eaning blade is composed of t w o m at erials: felt on the left side and rubbe r on the ri

rubs

printhead

against the rubber half of the blade. When the carriage moves left to ri amount of ink is sent to the nozzle surface before wipin adherin

objects come off easily.

ht. When th e c arriage moves right to left, the

ht, the print head

wipes

against the f elt half. A small

to make

Suctionin ink awa prevent s ink f rom remainin

takes plac e w hen the prin t er us es the ink pu m p to suction

from the nozzles. Th is elim inates tra pped air bubbles and

near the nozzles and drying out.

The print er performs s uc t ioning at three diff erent power levels. During hi

h-power suctioning, the printhead is fully capped and the bleed valve remains c los ed. This switches to medium-power suctionin

ives rise to m ax im um suction. The printe r t hen

, a sensitive operatio n performed with the bleed valve open. This elim inates air bubbles form ed in the printhead cavity during high-power s uc t ioning. Finally, with the bleed valve still open but the pump motor runnin perform s low -power suc t ionin

. This vacuums away any ink that

remains on the nozz le plate and in the ink c ap followin

at a lower speed, the printer

other cleaning

procedures. The fi

various head clean in

ure belo w sh ow s w here the carriage is positioned during the

operations .

Printable Area



Discharging

Dischar printhead. Unlike suctionin

is the elect ronically controlle d ejection o f in k fro m th e

, which uses an external pump, discharging uses the printhead’ s o w n PZTs to perform the operation. Dischar eliminate s th e v is c ous ink that fo rm s w hen ink near th e printhead nozzles starts drying out.

A: Medium- and low-power suctioning position B: High-power suctioning position (home position) C: Discharging position (right) D: Wiping/rubbing position E: Cartridge replacement position F: Discharging position (left) G: ASF drive position

ABCDE

Figure 2-11. Carriage Positioning

Page 54

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

y sq

Pump Mechani sm

The pump mechanism, shown in Figure 2-12, ac t ually perform s three different functions:



The pump itself removes ink from the ink cartrid head cleanin



The cl eanin part of the head clean in



The carria

operation.

blade removes dust and dirt from th e printhead , a s

operation.

e lock retains the carriage in its home position, to ensure

e, as part of the

that the printhead remains capped when the printer is not in us e.

The cl eanin

blade and th e c arriage lock are mounted on the same slider unit , a nd t herefore e xtend or retra c t in ta ndem. The slider’s motion is c ont rolled by the slider lev er, which is held against the clutch plate b friction ins t ead of to turn even when the slider unit is full

a compre ssion spring. Because th e s lider lever is operated by

ears, the rest of the pum p mechanis m c an continue

extended or ret racted. However, this also means that even a minor obstruction can cause the slider to sti ck.

The pump itself uses pe ris t alt ic c om pression. R ollers attached to the pump driv e w heel create a vacuum in th e ink drain tube b the tube al on shown in Fi followin

its length and forcing the ink to tra v el t hrough it. This is

ure 2-12 at right, an d s c hematically in Figure 2-13 on th e

page.

ueezing

Eject R oller Shaft

Gear B

Gear C

C lutch plate

Com pression spring

Gear A

Pum p drive

w heel

Slider lever

Rollers

C leaning blade

C a rria g e lo ck

Slider

Figure 2-12. Pump Mechanism

In k d ra in tube

C apping unit

As mentioned abov e, th e PF m otor is the po w er source fo r both the paper feed mechanism and the pump mechanism. The PF motor powers the pump mechanism through the eject roller shaft, as shown in

ure 2-10 and Figure 2-12 at right.

Page 55

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

(

Although economy of design results from th e pump mec hanism a nd th e paper feed mechanis m s harin the pump to be runnin

every time the printer feeds paper. To overcome this problem, the ope rations of pa per feedin are kept separate b

the PF mot or’s directio n of rot ation. Sinc e t he printer fee ds paper in one direction onl for runnin

the pump.

the same motor, it is not desirable for

and pumping

, the other direction is re s erv ed

Here’s how that works: Slots in the pump’s drive wheel permit two rollers to move radial l direction of rotation. As shown in Fi counterclockwise are forced out w ard to com press a caus ed b

the angle of the slots and friction between the rollers and the drain tube. In this position, pumpin turns clockwise move inward, and no pum pin

CCW Rotation

inward or out w ard, depen ding on the wh eel’s

ure 2-13 , when the pump turns

as viewed from the left side of the printer), the rollers

ainst the ink drain tube . This is

takes plac e. W hen the pump

the direc ti on of paper feeding), the rolle rs relax and

occurs.

C W R o ta tio n

The tab le below sum m arizes the re lat ionship be tween the PF m otor’s directio n of rotation and the pump m echanism ’s operation .

Table 2-7.

PF Motor Rotation Pump Mechanism Functions

Clockwise (CW) Pump operates

Counte rc lo c kwise (CCW) Pump does not operate

PF Motor and Pump Mechanism Functi ons

Head cleaner extends Carriage lock extends

Head cleaner retracts Carriage lock retracts

For the p um p to drain ink aw ay from the cartridge, not only must the pump be runnin printhead cappin followin

section ex plains the operation of th e c apping mechanism.

, but the print head must be f irm ly seated on the

mechanism with the air bleed valve closed. The

Tube com pressed

Tube released

Figure 2-13. Pump Rotation

Page 56

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

Capping Mechanism

The capping mechanism s eals the print head whe n t he printer is not in use. This pr ev ents the ink f rom t hic k enin to the air. Also, the cappin

mechanism creates a vacuum seal around

the printh ead, which e nables ink su c ti onin

due to con ti nuous expos ure

to take place.

Included in t he c apping mechanism is an air bleed v alue. See Figure 2-14. Durin This enable s the pum p to and low-power suctionin pushin

high-power s uctioning, the blee d v alue is kept clos ed.

enerate maximum suction. During medium-

, the carriage moves all t he way to th e r ight,

the valve release pin against the f rame of the capping mechanism. This opens th e bleed va lve and reduc es vacuum pressur e in the cap.

Air bleed hole

Valve-Closed

Position

Printhead guides

Ink drain hole

Bleed valve

Valve closed

Valve-Open

Position

Cap

Valve open

Valve release pin

Figure 2-14. Capping Mechanism - Bleed Valve Operation

Page 57

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

2.2 Electronic Circuit Boards

The Stylus COLOR 440, 640, and 740 contain three circuit boards each:



lus COLO R 440:

St Main: C206 Mai n-B or C255 Main Board * Power Supply: C206 PSB, PSE Board Control P anel: C206 PNL Board



lus COLO R 640: Main: C256 Mai n Board Power Supply: C206 PSB, PSE Board Control P anel: C206 PNL Board



lus COLO R 740:

St Main: C257 Mai n Board Power Supply: C257 PSB, PSE Board Control P anel: C209 PNL Board

The printer’s main electrical s 2-15 at ri

ht.

stems are connected as shown in Figure

* The C255 M ain board w ill ev entually replace th e C 206 Main-B board.

C206 PSB/PSE Board C257 PSB/PSE Board

CR Motor

PF Motor

AC Input

+5 V D C

+42 V D C

C206 Main-B C255 Main C256 Main C257 Main

+42 V D C

+5 V D C

HP S ensor

PE Sensor

Black/C olor Ink Cartridge Sensor

Ink-End C ounter

C206 PNL C209 PNL

ASF Lever

Position Sensor

and Pow er-O ff

Tim er

+5 V D C

LE D

Therm istor

Printhead

N ozzle S elector

Figure 2-15. Connections Between Main Electrical Systems

Page 58

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

(

y g

)

ging

(hig

(

g.)

2.2.1 Power Supply Board

The Stylus COLOR 440, 640, and 740 use one of two power supply boards: the PSB, which accepts 120 volts, or the PSE, which accepts 240 volts. The difference between them lies in their primary circuitry, which includes the pow er line filter, th e m ain switchin the transformer. In the PSE, these components are desi withstand hi differences, the two boards are exactl

The power suppl

es power th e v arious printer function s sh ow n in the table below.

volta

her input v olt ages than in the PSB. Except for these

the same.

provides filtered output at 5 and 42 VDC. These

Table 2-8. Power Output Applications

Voltage Application

42 VDC CR motor

PF motor Printhead PZTs

5 VDC Logic circuitry

Control signals Sensors Control panel LEDs Printhead nozzl e selector IC

Built into the power suppl

is a delay circuit, which keeps the printer fully powered for about 30 seconds after the printer is turned off. onl

when you turn the power off by pressing the Power switch on the

not

front cont rol panel; the printer will dela path and to return the carria

ives the printer time to eject any paper that may be in the paper

e to its home position. (The carriage must

stay on if you unplug it.) The

return to its home position in order to cap the printhead. If the printhead remains unc apped, ink dries out and clo

s the prin th ead.

transist or, and

ned to

This works

Power Supply Operation

When th e printer is plugged in, elec t ric ity is always presen t in th e primar compon ents are alwa main switchin on the main swtichin touch the primar plu

The secondary power supply circuitry, as well as the rest of the printer’s electrical components, are electricall line volta coupler PC1.

The pow er suppl Rin re an external power source, the line filter blocks power-line transients from en te ring the printe r and preven ts radio frequency interfer ence

placed bac k ont o the power line. In the PSB board, the prim ar

at 120 VAC rm s) then undergoes full-wave rectific ation and is smoothed to produce 160 VDC. is over 30 0 VDC after fi lte rin circu it an d a second ar VDC; feedback ensures stable output. A second, additional output at 5 VDC is produced by a chopper regulator IC wh ic h draws from t he 42volt suppl

At the he art of th e s w it c hing circuit is a p ow er MOSFET (Q1), an efficient t transistorized switchin

circuitry of the power supply. This means that certain

s “hot,” including the powe r line filter circuit, the

transistor, and the transformer. Note that the heat sink

transistor (Q1) is

not

electrically isolated . Nev er

components of the power supply with the printer

ed in.

isolated from the prim ary power-

e. Isolati on is accomplished by transform er T1 and ph ot o-

consists of a line filter, a ZC-RCC (Zero-Cross

Choke Converter) switching circuit, and a 5-volt chopper

ulator IC. See Figure 2-16. When AC power enters the printer from

h-level harm onics) generated by the switching circuit from being

current

In the PS E board, the 220 VAC inp ut

This is fed through the RCC switching

smoothing circuit to produce a stepped-down 42

pe of transistor that dissipates relatively little heat. By using a

circuit instead of a transformer to regulate

Page 59

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

)

(

ying

C11

L1,R1-2 C1-C4

DB1

Transformer (T1)

Fuse

Filter Circuit

Bridge Rectifier

Smoothing Capacitor

Main Switching Transistor

Feedback circuit

Q2,Q3,Q31

PhotoCoupler

PC1

D51

AC Input

Smoothing Capacitor

C51

+42VDC Line Voltage Regulator

ZD81-86,ZD51

Power Drop Delay Circuit

C84,Q84

+42VDC Line Over-Voltage Monitor

ZD52,87

+5V Regulator

IC51

+42 VDC

+5 VDC

+5VDC Line Over-Voltage Monitor

PSC

ZD53

+42VDC Line Under-Voltage Monitor

ZD90

Feedback circuit

voltage, the power supply’s cost is reduced. (Although a small transform er is still used, it ’s relativel lar

e, heavy transform er that wou ld ot herwise be needed.

inexpensive compared with the

The RCC switching circuit works by alternate ly energizing and de-

izing the transf orm er. Oscilla tio n begins when the voltage at the

ener

ate of Q1 rises through kick-s ta rt res is t or R 18. Current passing throu diode D51 prevents cu rrent from flow in secondar ma

h Q1 enters tra ns f ormer T1, e nergizing its primary coils. Since

through the transformer’s

coils, the transformer is forced to store the energy as a

netic field.

After startup, Q1 is held by voltage supplied by the transformer. This volta

e is switched on and of f by IC1, a programmabl e unijunction transistor its output volta PUT shuts off. This deprives Q1 of volta allowin field colla ps es , c urrent be secondar dischar has full cont ains le s s ener has been chopped out, and can now be used for the final stepped-down volta which is then re diodes.

As discus s ed above, the power suppl enables t he printer to rem ain on lon down operations. When switch on the fr ont control p anel, the pow er control si the main bo ard ener turns on the power suppl

PUT). As the transformer becomes magnetically saturated,

e drops below the PU T ’s holding threshold, and the

e, causing it to shut off and

the transf ormer to release its store d energy. As the magnetic

ins flowing through the tran s fo rm er’s

coils. (Since the current’s direction is re v ers ed during

e, diode D51 no longer blocks its flow.) When the transformer

de-energized, the cycle repeats. The resulting pulsed output

e. To smooth the waveform, capacitor C51 filters the output,

than t he original input, since the unwanted energy

ulated at 42 v olts by a stack of seven 6-volt zener

contain s a built-in delay that

enough to complete its power-

ou turn on t he printer by pressing the power

izes transistor Q84, which acts as a relay and

. At the same time, the PSC charges

nal (PSC) from

capaci to r C 84. As a result, ev en when capacitor continues suppl

power to Q84 and keeps the printer on for

ou shut the printer off, th e

at least an addition al 30 seconds . To prote c t the printer, th e power suppl

under- v olt a

e, and sho rt -c irc uit protection circuitry. These ci rc uit s contain z ener diodes , which monit or the re the 5-volt suppl volts, the RCC switchin falls to zero. In addition, a volta

exceeds 9 volts, or if the 42-volt supply exceeds 48

circuit is immediately shut off and its output

e drop protection circuit protects the printer in c as e of a short circ uit in an 42-volt line. This also w ork s b

shutting off the switching circuit, which

incorporat es over-volt age,

ulated out put voltages. If

component that draws from the

occurs w hen outpu t falls below 36 volts. Finall power s uppl

itself, in case of a short circuit in any primary compon ent.

Figure 2-16. PSB, PSE Board Block Diagram

, fuse F1 protects the

Page 60

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

(

)

2.2.2 Main Circuit Board

The main board proce sses all incom ing data and tr anslates it int o control si

nals use d t o operate the printer mec hanism.

P-ROM (IC3)

Address

Data

TPM95C061 (IC1)

Address

Data

Head

D-RAM (IC4)

E05B44 (IC2)

Batt1

The St

lus COLO R 440 uses one of two main boards: th e C 206 MAIN-B or the C255 MAIN. C206 MAIN-B. MAIN and the St

CN8 HD FFC

CR1

Timer Counter (IC5)

EEPROM (IC11)

Reset IC (IC9)

CN3

In addition, the Stylus COLOR 640 uses the C256

lus COLOR 740 uses the C257 MAIN.

Q7&Q9

CN1 Parallel

Common Driver (IC6)

The C255 MAIN will eventually replace the

CR Motor

PF Motor

CN6

CN7

Motor Driver (IC14)

Motor Driver (IC15)

CN5

CN4

PE Sensor

CN11

HP Sensor

C206 PNL

ASF Sensor

Figure 2-17. C206 MAIN-B, C255 MAIN Board Block Diagram for Stylus COLOR 440

Page 61

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

M-ROM (IC6)

Head

CN8 HD FFC

CR Motor

P-ROM (IC3)

TPM95C061 (IC1)

Address

Data

Address

Data

Transceiver (IC16)

D-RAM (IC5)

E05B43 (IC2)

Batt1

EEPROM (IC11)

CN4

CR1

Timer Counter (IC10)

CN11

CN5

Reset IC

(IC9)

CN3

Q7&Q9

CN1 Parallel

Common Driver (IC7)

CN6

Motor Driver (IC14)

C206 PNL

ASF Sensor

PF Motor

CN7

Motor Driver (IC15)

CN2 Serial

PE Sensor

HP Sensor

Figure 2-18. C256 MAIN Board Block Diagram for Stylus COLOR 640

Page 62

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

P-ROM (IC3)

D-RAM (IC4)

D-RAM (IC5)

M-ROM (IC6)

C90A05 (IC1)

CN3 USB

Address

Data

Head

CN1 Parallel

Buffer (IC9)

E05B588 (IC2)

Batt1

CR1

Timer Counter (IC8)

EEPROM (IC7)

CN4

CN9 HD FFC

Common Driver (IC14)

Reset IC (IC9)

CN11

CN6

Q2&Q3

Motor Driver (IC11)

CR Motor

PF Motor

CN7

CN8

Motor Driver (IC12)

Motor Driver (IC13)

C209 PNL

CN2 Serial

Transceiver (IC10)

CN5

PE Sensor

HP Sensor

ASF Sensor

Figure 2-19. C257 MAIN Board Block Diagram for Stylus COLOR 740

Page 63

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

)

(Sty



CPU

The 16-bit CPU (IC1) runs at 25 MHz and performs the printer’s data processin out the CAS and RAS refresh si

and memory management functions. This incl u des se nding

nals required by the DRAM.

Gate Array

The gate array (IC2) is the main hub for transmitting control signals and receivin

data. It interf ac es with the fo llowing devices:

Paralle l I/F c ontrol

IEEE1284 Ni bble m ode, t he gate array not only receives data

Usin from the host computer but can also return information about the printer’s s ta t us .



USB I/F Control The tran s c eiv er circuit that c ontrols the USB interfac e has been incorporated into t he

lus COLO R 740 onl

ate array.



Paper Feed and Car ria

ate array outputs motor control signals to the PF and CR

The motor drivers.



Printhead Driver The

ate array outputs c ontrol signals to the PH driver.



EEPROM Default settin cartrid stored in the EEPROM. The the printe r is first t urned on, an d w rit es data to the E EPROM at power-of f .



Sensors The printer con ta ins 6 se ns ors. Of these, 5 feed data directl

ate array. (The thermistor connects to the CPU.



Power-Off Timer The lon level of cleanin how lon

e usage, ink waste pad coun t, and adjustment values are

ate array receive s inf ormation fro m a t im er that mon ito rs how

the printer is turned off. When the printer is turned back on, the

s, records of previous printhead cle anings, ink

the printe r performs on th e printhead depends on

the power has been off.

e Motor Driv ers

ate array retrieve s th es e data when

to the



Serial I/F Control

ate array receive s se rial port data t hrough the transc eiv er IC.

The

lus COLOR 740 only)

Page 64

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

)

(

)

(

)

+5V

AT93C 46 (IC 11)

Vcc

GND

ORG

E05B 43 (IC 2 )

130

129

128

127

ECS

ECK

ECO

ECI

+5V

AT93C 46 (IC 7 )

Vcc

GND

ORG

E05B 588 (IC 2 )

206

205

204

203

EECS

EECK

EECO

EECI

EEPROM

The EEPR OM of Stylus COLO R 440, 640, and 740 contains the followin



Ink cartrid



Ink waste pad counter



Printhead cleanin

e consumption da ta (Blk, CMY

information (keeps track of previous cleaning

operations



Destination information



ustment values (Bi-D, printhead voltage ID, etc.



Default values set b

the user

As shown in the figures below, the EEPROM connects to the gate array

IC2) by 4 lines which perform the following functions:



CS: Chip select si



CK: Clock puls e



DI: Data in (writing of serial da ta at pow er off



DO: Data out

nal

reading of serial d at a at power on

+5V

127

128

126

125

E05B 44 (IC 2 )

ECS

ECK

ECO

ECI

AT93C 46 (IC 1 1 )

Vcc

ORG

GND

Figure 2-21. EEPROM Control Circuit Stylus COLOR 640

Figure 2-20. EEPROM Control Circuit for Stylus COLOR 440

Figure 2-22. EEPROM Control Circuit for Stylus COLOR 740

Page 65

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

)

Reset Circuit

The reset circuit (IC 9 on the Stylus COL OR 440 and 640, I C 8 on the

holds the res et pins of the C PU and the gate array LOW at power-

740 on. This resets the chips’ internal state and prevents them from outputting erratic signals or data. To give the power supply time to build up a stable output volta dela

is programmed by an external RC network . When the reset signal is removed after the dela functionin

e, a brief delay is built into the system. This

, the CPU and the gate array begin normal

PS T 592D (IC 8 )

N ot m ounted

TM P 95C 061 (IC 1 )

P84

/N M I

CPU

Vout

NRES

Vcc

GND

C47

P85

/RESET

+5V

2 3

+5V

174

R 138

E05B 44 (IC 2 )

/RESET

G a te A rra y

+5V

8 7

R10

+42V

M 62030 IC 9

GND

MRES

VCC OUT1 OUT2

Reset

Figure 2-23. Reset Circuit for Stylus COLOR 440

Page 66

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

R10

+42V

PS T 592D (IC 8 )

N ot m ounted

TM P 95C 061 (IC 1 )

P84

/N M I

CPU

Vout

NRES

Vcc

GND

C47

P85

/RESET

M 62030 (IC 9 )

GND

2 3

MRES

VCC OUT1 OUT2

Reset

+5V

lus COLO R 740 has a dua l

the printe r is of f.

+5V

The res et IC on the main board of the St role. As shown in the fi

ure below, it co m bines the res et circuitry with

the pow er-off timer th at m onitors how lon

IC 1 C 90A 05

CPU

R138

/R E S

174

E05B 43 (IC 2 )

/RESET

G a te A rra y

+42

TT ii mm ee rr SS ii gg nn aa ll

IC 8 R TC -9810

VIN

VDD

VBK

GND

Reset

/V D T

FRST

/R S T

SCLK

DATA

TT ii mm ee rr SS ii gg nn aa ll

/N M I

MRES

/R ESET

G a te A rra y

IC 2 E05B 588

+5V

8 7

Figure 2-25. Reset Circuit for Stylus COLOR 740

Figure 2-24. Reset Circuit for Stylus COLOR 640

Page 67

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

)

ging

Batt1

0.1u

S-3510ANF (IC10)

2 3

VCC GND

5 6

125 123 126

CR3

E05B43 (IC2)

TCE TCLK TDATA

RM7

/SCK

/SIO

RTC-9810 (IC 8 )

Vin

SCLK

Data

Vdd

Vbk

GND

E05B 588 (IC 2 )

T M C S

T M C K

TM D ATA

Batt1

Power-Off Timer Circuit

The timer IC measures how long the printer is turned off. When the printer is turned on, the I C s ends the pow er-off time to th e The power-off time determines how extensivel

the printhead is cleaned

at power- on.

ate array.

In th e St CR3

lus COLOR 440 and 640, an external crystal oscillator (CR1 or

provides the basic timing pulse. In the Stylus COLOR 740, the oscillator is built into IC8, th e s ame chip th at co nt ains the res et ci rc uit . Since the cr IC conver ts it int o a s

stal’s os c illation prod uc es an analog waveform, the timer

uare wave to enable it to be processed digitally.

When the pr int er is on, power is supplied to the ti m er t hrough the 5-volt power bus . Wh en the printer is turned of f, a 3-volt lithiu m batter powers the chip. Diod es on the power s uppl from char

when the printer is on, and from discharging back into the

line prevent the battery

power line w hen the prin t er is of f .

S-3510ANF (IC5)

CR1

Batt1

0.1u

Figure 2-26. Timer Control Circuit for Stylus COLOR 440

VCC

GND

E05B44 (IC2)

/SCK

/SIO

TCE TCLK TDATA

123 121 124

5 6

RM7

Figure 2-27. Timer Counter Circuit for Stylus COLOR 640

Figure 2-28. Timer Counter Circuit for Stylus COLOR 740

Page 68

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

)

Sensor Circuits

The printe r m ec hanism inc ludes 3 sens ors. As show n in the follow ing

ures, they connect directly to th e gate array (IC2).



ASF Sens or The ASF sensor detects the home position of the auto sheet feeder.



PE Sensor The PE sen s or determines if there is paper in the printer. In addition, if p aper of non-st andard len the PE sensor detects its ed

e and prevents printing from taking

th is inserte d into the print er,

place on th e bare platen .



HP Sensor The HP sens or detects t he home po si ti on of the carria

The following sensor s a re part of the pr int head and ca rriage unit.



Thermistor The thermistor dete c ts printhead te m perature an d m aintains print

uality despite changes in enviro nm ental conditions. When the

thermist or heats up, its res is t ance chan

e relays this information to the CPU. The gate array makes

volta

ht adjustments to the PZ T driv e voltage based on this

sli information, and pri nt



Cartrid

e Sensors (Black, Color

uality is maintained.

es and a corr es ponding

Sensors built into the carriage unit dete c t the presence of the ink cartrid turned on. Th is inf ormation is rec eived b St color ink cartrid counter

es during cartridge replacem ent and when the power is

the gate array. In the

lus COLOR 440, 640, and 740 printers, every time the black or

e is removed, its respective ink consumption

ets reset.

IC 2 E05B44

SW4

SW5

SW6

206

204

202

+5V

ASFV

GND

ASF

HPV

GND

PEV

GND

CN11

ASF

CN5

CN4

Figure 2-29. Figure 5-23. Sensor Circuit for Stylus COLOR 440

IC 2 E05B 43

SW 4

SW 5

SW 6

206

204

202

+5V

ASFV

GND

ASF

HPV

GND

PEV

GND

CN11

ASF

CN5

CN4

NOTE: Ink consumption is not detected by a senso r. Ra th er, it is calculated from the same EPW data that the printer sends to the host.

Figure 2-30. Figure 5-24. Sensor Circuit for Stylus COLOR 640

Page 69

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

g (

Printhead Driver

The print head control circuit ha s th e fo llowing features:

IC 2 E05B 588

SW A0

SW A1

SW A2

+5V

Figure 2-31. Sensor Circuit for Stylus COLOR 740

ASFV

GND

ASF

HPV

GND

PEV

GND

CN4

ASF

CN5

CN6



h-speed drive: the common vo lt age drive circuit runs at 14.4

Hi KHz.



Sli

ht vibration m ode: this is added during carriage accelera ti on

to elimin at e t rapped air bubbles.



Normal Dot and Dual Firin these modes can be selected b

also calle d N ormal-Dot -2Dot):

the user from t he driver

software.

The print head control circuit is div ided into tw o parts: the co m m on voltage drive, which supplies power to the printhead as a whole, and the nozzle selector drive, which determines the individual PZTs to which the power is applied.

Page 70

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

(

Common Voltage Drive Circuit

The common volta drivin arra

the PZTs (piezo-electric elements) in the print head. The gate

outputs signals to the c ommon driv e IC (H8D281 3, H 8D 2889, or CXA20995 in the St IC then drives 2 power transistors arran

e drive circuit generates th e v olt age waveform for

lus COLO R 440, 640, or 740). The common drive

ed in a push-pull configuration

see Figures 2-32 t hrough 2-34 below). The wave f orm produce d by these trans is t ors is called th e “t rapezoida l” w av ef orm, beca us e it looks like an irre trapezoi dal wavefor m ca n be observed an whether somethin

ularly shaped trapezoid wi th a sma ll step in the mi ddl e. Th e

time the printer is on,

is being printed or not.

Table 2-9. Common Voltage Driver Characteristics

Items Characteristics

Drive voltage 42 volts ± 5%

Waveform appears after voltage rises above 5 volts.

Final drive element

(power transistors)

Operation during reset Both transistors are off.

2S 2S

C3746 A1469

(PNP) (NPN)

Nozzle Selector Drive Circuit

The nozzle selector IC is located in the printhead itself. Data from the

ate array is sent seria lly to the IC and latched in one-byte units. After the IC inter prets the data, it sends print si appropriate PZTs. These si waveform produced b which PZTs

et actuat ed by the common voltage in each cycle.

nals are synchronized with the trapezoidal

the common voltage driver, and de t ermine

nals in parallel to the

Figure 2-32 , Figure 2-33 , and Figure 2-3 4 show printhead driver

rams for each printer.

dia

+42

H8D2813(IC6)

CHG KC1 ND1 ND2 MD1 MD2 Data CLK /STB /CLR VRF VK

E05B44(IC2)

199

VHCTL

CHG KC1 ND1 ND2 MD1 MD2 Data

YCMHSO

CLK /STB /CLR

BCHCLK

VRF VK

TMP95C061(IC1)

XOVM CTB COM DTB

Vcc

GND GND

SW7 SW8

BIEN

BHSO

YCMIEN

ICLK

/NCHG

2 4

200 198

90 99

100

97 96

93 92 89

AN0

15 14

12 10

16 17 18

20 21

8 6 4

1 2 5 9

VHV VHV

VDD GND

GND GND GND GND GND

COM COM COM

GND2 GND2 GND2

BCO CCO LAT SI1

SI2

CLK

NCHG

THM

CN8

Figure 2-32. Head Drive Circuit for Stylus COLOR 440

Page 71

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

+42

H8D2889(IC7)

CHG KC1 ND1 ND2 MD1 MD2 Data CLK /STB /CLR VRF VK

E05B43(IC2)

199

VHCTL

VHCTL CHG KC1 ND1 ND2 MD1 MD2 Data CLK /STB /CLR VRF VK

TMP95C061(IC1)

XOVM CTB COM DTB

Vcc

GND GND

SW7

SW8

HSOIEN

HSO1 HSO2 HSO3

ICLK

HCLK

/NCHG

2 4

201 199

92 96

97 99 101 94 95 91

P84

VHV

VDD GND

GND GND GND GND GND

COM

GND2

BCO CCO LAT

SI1 SI2 SI3

CLK

NCHG

THM

CN8

CXA20996(IC14)

VCC45 Vcc45_2

NPNB

PNPB

A3 CLK1 CLK2 /FLOOR

VCC5

/RST DATA DCLK /E

VOUTGND

E05B588(IC2)

VHCTL

HWA0 HWA1 HWA2 HWA3 HWCLK1 HWCLK2 /HWFLR /HWRST HWSDATA HWSCLK /HWSLAT

TMP95C061(IC1)

SWC0 SWC1

HLAT

HNCHG

HCLK

IECLK

HSI1 HSI2 HSI3

HSI4 HSI5 HSI6

23 20

18 16

190 189 184 173

174

175 176 177

178 179

180 181

AN0

105

15 14

12 10

8 6 4

19 20 21

16 17 18

1 2 5

9 7

CN9

VHV

COM

GND2

BCO

CCO

LAT

NCHG

CLK

SI1

SI2

SI3

SI4

SI5

SI6

THM

GND

Figure 2-33. Head Driver Circuit for Stylus COLOR 640

Figure 2-34. Head Drive Circuit for Stylus COLOR 740

Page 72

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

(

Paper Feed (PF) Motor Driver

The paper f eed motor is a bipolar stepper motor c ontrolled by a pulsewidth modulation current ou t put f or m aximum motor stabi lit followin

figures for circ uit details.

PWM) circuit. The drive circuit provides contant

and contro l. Se e t he

PFIA0

PFIA1

PFIA2

PFPHAA

PFIB0

PFIB1

PFIB2

PFPHAB

E05B 588(IC 2)

A3956(IC 12)

PHASE

REF

PFD

OUTA

OUTB

VBB

VCC

E05B44 (IC2)

LB1B45

(IC15) PFAPH PFA1 PFA0 PFBPH PFB2 PFB0 PFV0 PFV1 PFV2 PFV3

59 58

57 50

55 46 47

PH1

I11

I01

PH2

I12

I02

Vref1

Vref2

Out1A Out1B Out2A Out2B

7 6

9 8

Figure 2-36. PF Motor Driver for Stylus COLOR 440

CN7

Rotor

A3956(IC 13)

OUTA

OUTB

VBB

VCC

C 90A 05 (IC 1 )

DA1

112

PHASE

REF

PFD

Current Detection

M 6252(IC 16)

CN8

Rotor

Figure 2-35. PF Motor Driver for Stylus COLOR 740

E05B43 (IC2)

PFA0 PFA1 PFA0 PFB1 PFB2 PFAPH PFV0 PFV1 PFV2 PFV3

UDN2917 (IC15)

57 58

55 56

59 46 47 48

I10

I11

I20

I21

PH1

PH2

Vref1

Vref2

Out1A Out1B Out2A Out2B

6 3

18 21

CN7

Figure 2-37. PF Motor Driver for Stylus COLOR 640

Rotor

Page 73

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

(

Carriage (CR) Motor Drive Circuit

The carriage motor is a bipolar stepper motor controlled by a pulsewidth modulation current ou t put f or m aximum motor stabi lit followin

figures for circ uit details.

PWM) circuit. The drive circuit provides constant

and contro l. Se e t he

E05B44 (IC2)

PFAPH CRA1 CRA0 CRBPH CRB1 CRB0 CRV0 CRV1 CRV2 CRV3

75 74

72 46 47

25 23

20 21

26 17

PH1

I11

I01 PH2

I12

I02

Vref1

Vref2

LB1B45 (IC14)

Out1A Out1B Out2A Out2B

7 6

9 8

CN6

Figure 2-38. Carriage Motor Drive Circuit for Stylus COLOR 440

Rotor

Page 74

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

E05B43 (IC2)

CRA0 CRA1 CRA0 CRB1 CRAPH CRBPH MTBV0 MTBV1 MTBV2 MTBV3 MTBV4

MTAV0 MABV1

75 76

75 73

74 60

65 66

2 1

23 24 43

44 25

I10

I11

I20 I21

PH1

PH2

Vref1

Vref2

UDN2917 (IC15)

Out1A Out1B Out2A Out2B

6 3

18 21

CN5

Rotor

MTAV2 MTAV3 MTAV4

70 71

Figure 2-39. Carriage Motor Drive Circuit for Stylus COLOR 640

Page 75

EPSON Stylus COLOR 440, 640, and 740 Chapter 2 Operating Principles

C90A05 (IC1)

E05B588(IC2)

111

DA0

193

CRIA0

194

CRIA1

195

CRIA2

196

CRIA3

200

CRIB0

199

CRIB1

198

CRIB2

197

CRIB3

CRPHAA CRPHAB

CRENBA CRENBB

191 202 192

201

Current Detection

M6252(IC15)

LB1847(IC11)

IA1

IA2

IA3

IA4

IB1

IB2

IB3

IB4

PHASE1

PHASE2

ENBL1

ENBL2

CN7

Vref1

Vref2

OUTA OUTA-

OUTB OUTB-

7 6

9 8

Rotor

Figure 2-40. Carriage Motor Drive Circuit for Stylus COLOR 740

Page 76

TROUBLESHOOTING





Page 77

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

)

(

)

(

)

3.1 Troubleshooting

The printer may exhibit different symptoms for the same problem. Start

Table 3-4

with flowchart to identif tables at th e end of this chapter for det ailed information on tes t in repairin

The following figure illustra te s th e m ain steps of th e t roublesho ot ing process.

Power Supply

to locate th e appropriat e f lowchart, and then use t he

a problem bas ed on its symptoms. Refer to the

printer components.

START

Unit-Level Troubleshooting

Repair

Main Board

Repair

Printer Mechanism

and

Repair

3.1.1 Component Test Specifications

The follo w ing tables spec ify the values at which the CR motor, PF motor, and sensors should test. In addition, Table 3-3 shows how to interpret the printe r’s LED error in dic ators.

Table 3-1. Motor Coil Resistance

Motor Name Location Check Point Resistance

CR motor • St

640 CN6 (Main

lus Color 44 0/

Pins 1 & 3, Pins 2 & 4

board *

•Stylus Color 74 0 CN7

Main board

PF (pump) motor

•Stylus Color 44 0/ 640 CN7

Main

Pins 1 & 3, Pins 2 & 4

board *

•Stylus Color 74 0 CN8 (Main board *

* Main board refers to the following:

Stylus Color 440: C206 Main-B or C255 Main Stylus Color 640: C256 Main Stylus Color 740: C257 Main

7.8 Ohms 10%

Reassembly and Adjustment

END

ure 3-1. Troubleshooting Process Flowchart

Page 78

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

Table 3-2. Sensor Check

Sensor Name Location Signal Level Sensor Status

• Stylus Color 440/640

Paper end sensor

Carriage home po sition sensor

ASF home position sensor

Black cartridge sensor (BCO)

Color cartridge sensor (CCO)

Thermistor Pins 3 & 4 or Pins 3 & 6

CN4/Pins 1 & 2

• Stylus Color 740 CN5/Pins 1 & 2

• Stylus Color 440/640 CN5/Pins 1 & 2

• Stylus Color 740 CN4/ Pins 1 & 2

• Stylus Color 440/640 CN11/Pins 1 & 2

• Stylus Color 740 CN6/ Pins 1 & 2

• Stylus Color 440/640 CN8/ Pins 1 & 18

• Stylus Color 740 CN9/Pins 1 & 19

• Stylus Color 440/640 CN8/ Pins 2 & 18

• Stylus Color 740 CN9/Pins 2 & 19

Open: less than 0.7 V Paper loaded

Closed: more than 2.4 V No paper

Open: less than 0. 7 V Home position

Closed: more than 2.4 V Away from home position

Open: less than 0. 7 V Home position

Closed: more than 2.4 V Away from home position

On: 0V Black cartridge out

Off: more than 2.4 V Black cartridge installed

On: 0V Color cartridge out

Off: more than 2.4 V Color cartridge installed Approx. 10 K

at 77° F (25° C)

Ω

Resistance increases with temperature.

Page 79

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

Table 3-3. LED Indicators and Printer Status

Indicators

Error Status

Paper out Blinking — — On

Paper jam — — — Blinking No ink cartridge or

ink end (black) No ink cartridge or

ink end (color) Maintenance

request

Fatal error Blinking On On Blinking

Power

—On——

— — On —

Blinking Blinking Blinking Blinking

Ink out (Black)

Ink Out

(Color)

Paper Out

Load additional paper and press the load/eject button.

Remove the paper, then press the load/eject button.

Insert a new black ink cartridge and press the load/eject butt on for 3 seconds.

Change the waste ink drain pad and reset the EEPROM.

Turn the printer of f and t hen on again. If the printer does not recover, repair the malfunctioning part.

Recovery

Page 80

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

3.2 Unit Level Troubleshooting

When a problem occurs, you can identify its cause by the symptoms the printer exhibits. Th e table below lists the s Once the problem is identified, refer to the flowchart that corresponds to the problem .

Table 3-4. Flowchart Selection

Symptom Problem Flowchart No.

Printer does not turn onLEDs do not light.

Printer mechanis m does not operate.

Error indicated by LEDs

Printing failu re Printing is not performed.

Paper not feeding correctly

Abnormal control panel operation

See Table 3-3 t o determine the specifi c error.

Abnormal printing (missing dots, etc. ) Print quality is poo r. Paper does not load. Paper feeding is irreg ular. Paper jam occurs. Printer does not respond when buttons ar e

pressed.

mptoms of certain problems.

Flowchart 1

Flowchart 2

Flowchart 3

Flowchart 4

Flowchart 5

3.2.1 Printer Does Not Turn On

START

Is the AC power line

voltage correct?

YES

Has fuse F1 on the power supply board

blown out?

Disconnect CN10 from the

main board and check the

output voltage from CN2 on the

power supply board.

Is the output voltage

of the power supply

normal?

Replace the power

supply board.

YES

Use only correct

input voltage.

Replace the fuse.

Replace the fuse and

disconnect CN10 from

the main board.

Check the resistance

of the PF and CR motor coils. (See

Table 3-1.)

Are the motors

OK?

Does the fuse

YES

Does the fuse

blow again?

YES

blow again?

NO (fuse fatigue)

YES

Replace the power

supply board.

Replace any

defective motors.

Replace the main board.

Reconnect CN10.

END

Flowchart 1

Page 81

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

3.2.2 Error Indicated by LEDs

START

D eterm ine the type of error indicated by the LED s. (S ee Table 3-3.)

Is it a fa ta l e rro r?

Is it a n in k

c a rtrid g e

e rro r?

M aintenance error

R eplace the w aste ink drain pad and reset the counter. (S ee "C ontrol P anel F unctions" in C hapter 1.)

C heck the ink cartridge sensors and replace the printhead if a sensor is defective.

T u rn o ff th e p rin te r, and m ove the carriage by hand.

YES

R eplace the ink cartridge w ith a new one.

YES

D oes the error appear again?

END

D oes the carriage m ove sm oothly?

YES

Check CR motor. R eplace the m ain board if the m otor is okay.

YES

Is the problem solved?

R efer to "Repair of the Printer M echanism " later in this chapter.

END

3.2.3 Printing Failure

START

Try printing

Run a

self-test.

Does the self-test

print correctly?

Make sure all

connectors on the

main board are

connected securely.

Perform a

printhead cleaning.

Replace the ink

cartridges.

Refer to Section 3.5,

"Repair of the Printer

Mechanism."

YES

from DOS

Does printing

work from

DOS?

YES

Check the

software

application and

printer driver

for the proper

settings.

Is the problem

solved?

Is the problem

solved?

Is the problem

solved?

Is the problem

solved?

YES

Check to see if

the interface cable is loose. If so, reconnect

it. Otherwise,

replace it.

Replace the main

board.

Check the

printer's

default

settings.

Is the problem

solved?

Replace the main

board.

Flowchart 2

END

Flowchart 3

Page 82

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

3.2.4 Paper Not Feedin g Correctly

START

paper set in th e A S F correctly?

YES

D oes

the PF roller

ro ta te ?

YES

R em ove any obstructions in the paper path.

C lean the P F roller.

Insert the paper correctly.

Is th e PF motor running?

YES

C h e c k th e P F m o to r. If it's not defective, replace the m ain board.

3.2.5 Control Panel Operation is Abnormal

START

Is the control panel

connected

properly?

YES

Is the FFC cable

visibly damaged, or is

there a break in its

continuity?

Re-connect

the control

panel.

Replace the

cable.

Is the

problem

solved?

Is the

problem

solved?

Replace the

control panel.

YES

Is th e

problem

solved?

YES

END

R efer to S ection 3.5, "R epair of the P rinter Mechanism".

Flowchart 4

END

Flowchart 5

Is the

problem

solved?

Replace the

C229 MAIN

board.

YES

END

Page 83

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

3.3 Unit Repair of the Power Supply Board

The names of the power supply boards are:

tylus COLOR 440: C206 PSB/PSE



Stylus COLOR 640: C206 PSB/PSE



Stylus COLOR 740: C257 PSB/PSE

This section describes proble m s related to the p ow er supply board.

Table 3-5

See checkpoints to evaluate each c om ponent an d pinpoint the problem .

below for symptoms and likely causes. Then use the

Page 84

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

Table 3-5. Repair of the C206/C257 PSB/PSE Board

Symptom Condition Cause Checkpoint Solution

The printer does not operate at all.

+42 V line is dead. F1 is open. Check F1 with a multimeter. Replace F1.

Transformer coils are open. Check for a waveform

across the drain and source of Q1. If the transformer is open, no voltage (no wavef orm) should be present.

Replace T1.

Switching FET (Q1) is defective.

Feedback transistors (Q2, Q3) are defective.

+42 V line is abnormal. Check the following parts.

Check at the drain. If the FET is open, the waveform will be a flat, positive voltage.

Check at the collector. Replace Q2 or Q3.

• ZD87, ZD52

• ZD51, ZD81–ZD86

•PC1

Replace Q1.

Replace malfunctioning parts.

Page 85

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

Table 3-5. Repair of the C206/C257 PSB/PSE Board (continued)

Symptom Condition Cause Checkpoint Solution

(Continued)

The printer does not operate at all.

+5V line is dead. IC51 (L4962E/FA3635P) is

defective.

Note:

• L4962 is used for Stylus COLOR 440/640.

• FA3635P is used for Stylus COLOR 740.

Stylus COLOR 440/640 only:

• Check the sawtooth waveform at Pin 5 of IC51.

Stylus COLOR 740

• Sawtooth waveform not measurable.

Replace IC51.

IC51 (L4962E/FA3635P) is defective.

Note:

• L4962 is used for Stylus COLOR 440/640.

• FA3635P is used for Stylus COLOR 740.

Stylus COLOR 740:

• Check the switching waveform at pin 7 of IC51.

Stylus COLOR 740:

• Check the switching waveform at Pin 8 of IC51.

Replace IC51.

Page 86

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

3.4 Unit Repair of the Main Board

The name of th e m ain board fo r each printer is :



This section describes proble m s related to the main controller board. See the tab le below for s checkpoints to evaluate each c om ponent an d pinpoint the problem .

lus COLOR 440: C206 MAIN-B or C255 MAIN

St St

lus COLOR 640: C256 MAIN lus COLOR 740: C257 MAIN

mptoms and likely causes. Then use the

Page 87

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

Table 3-6. Unit Repair of Main Board

Symptoms Condition Cause Check Point Solution

The printer does not operate at all.

CPU does not operate.

The reset circuit does not operate.

Stylus COLOR 440, 640:

Check the wavef orm o f the +5V and /Reset signal of IC9.

Pin 7 = +5 volts Pin 6 = /Reset

Replace IC9.

(Continued on the next page.)

Control ROM, D-RAM, and Mask ROM are defective, or are not being selected correctly.

(Continued on the next page.)

Stylus COLOR 740:

Check the waveform of the +5V and /Reset signal at IC8.

Pin 7 = +5 volts Pin 2 = /Reset

Stylus COLOR 440:

If you cannot find a wavefor m at the following pins, their respective ICs ar e d efective:

Pin 88 of IC1 Pin 20 of IC3 Pin 26 of IC4

Stylus COLOR 640:

If you cannot find a wavefor m at the following pins, their respective ICs ar e d efective:

Pin 97 of IC1 Pin 13 of IC3 Pins 98 and 99 of IC 1 Pin 27 of IC5 Pin 14 of IC6

Replace IC8.

Stylus COLOR 440:

Replace IC1, IC3, or IC4 .

Stylus COLOR 640:

Replace IC1, IC3, IC5, or IC6

Page 88

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

Table 3-6. Unit Repair of Main Board (continued)

Symptoms Condi tion Cause Check Point Solution

(Continued) The printer does not

operate at all.

(Continued) CPU does not operate.

(Continued)

Control ROM, D-RAM, and Mask ROM are defective, or are not being selected correctly.

Stylus COLOR 440:

CRU2 is defective.

Stylus COLOR 640:

CR2 is defective.

Stylus COLOR 740:

CR1 or IC2 is defec tive.

Stylus Color 740:

• If you cannot find a waveform at Pins 2, 128, and 127 of IC1, the chip is defective.

• If you cannot find a waveform at Pin 85 of IC2, the chi p is defective.

• If you cannot find the waveform at 13-pin of IC3, the IC3 is dead.

• If you cannot find a waveform at Pin 27 of IC4 or IC5, the respective chi p is def ective.

• If you can not find a waveform at Pin 14 of IC6, the chip is defective.

Stylus COLOR 440, 640:

Check the waveform at Pins 27 and 28 of IC1.

Stylus COLOR 740:

Check the waveform at Pins 118 and 119 of IC2. Also, check the output waveform at Pin 91 of IC2.

Stylus Color 740:

•Replace IC1.

•Replace IC2.

•Replace IC3.

• Replace IC4 or IC5.

•Replace IC6.

Stylus Color 440, 640:

Replace CRU2 or CR2.

Stylus Color 740:

Replace CR1 or IC2.

The carriage does not operate normally.

(Continued on the next page.)

The carriage motor does not operate at all or it produces an abnormal noise.

(Continued on the next page.)

IC2 is defective.

Stylus COLOR 440:

Check the waveform at Pins 25 and 18 of IC14.

Stylus COLOR 640:

Check the waveform at Pins 43 and 26 of IC14.

Stylus COLOR 740:

Check the waveform at Pins 27 and 16 of IC11.

Replace IC2.

Page 89

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

Table 3-6. Unit Repair of Main Board (continued)

Symptoms Condi tion Cause Check Point Solution

(Continued) The carriage does not

operate normally.

(Continued) The carriage motor does

not operate at all or it produces an abnormal noise.

Stylus COLOR 440, 640:

IC14 is dead.

Stylus COLOR 740:

IC11 is defective.

Stylus COLOR 440:

Check the waveform at Pins 6 through 9 of IC14.

Stylus COLOR 640:

Check the waveform at Pins 3, 6, 18, and 21of IC14.

Stylus COLOR 740:

Check the waveform at Pins 6 through 9 of IC11.

Stylus COLOR 440, 640:

Replace IC14.

Stylus COLOR 740:

Replace IC11.

Printing is abnormal. The printer does not print. The trapezoidal waveform

is not being generated.

IC2 is defective.

Stylus COLOR 440:

Check the trapezoida l waveform at the base of Q7 or Q9 on the C206 Main-B or C255 Main board.

Stylus COLOR 640:

Check the trapezoida l waveform at the base of Q7 or Q9 on the C256 Main board.

Stylus COLOR 740:

Check the trapezoida l waveform at the base of Q2 or Q3 on the C257 Main board.

Stylus COLOR 440, 640:

Check the clock si gnal for the trapezoidal wave for m at Pin 80 of IC2.

Stylus COLOR 740:

Check the clock si gnal for the trapezoidal wave for m at Pin 174 of IC2.

Stylus COLOR 440:

Replace IC6, Q7, or Q9.

Stylus COLOR 640:

Replace IC7, Q7, or Q9.

Stylus COLOR 740:

Replace IC14, Q2, or Q3. Replace IC2.

Page 90

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

Table 3-6. Unit Repair of Main Board (continued)

Symptoms Condition Cause Check Point Solution

Paper feed operation is abnormal.

Paper feed motor doe s not work.

IC2 is defective.

Stylus COLOR 440:

Check the waveform at Pins 25 and 18 of IC14.

Stylus COLOR 640:

Check the waveform at Pins 43 and 26 of IC16.

Stylus COLOR 740:

Check the waveform at Pin 7 of IC12 and IC13.

Replace IC2

Stylus COLOR 440, 640:

IC15 is defective.

Stylus COLOR 740:

IC12 or IC13 is defective.

Stylus COLOR 440:

Check the output waveform of Pins 6 through 9 of IC15.

Stylus COLOR 640:

Check the output waveform of Pins 3, 6,18, and 21 of IC15.

Stylus COLOR 740:

Check the output waveform of Pins 10 and 15 of IC12 and IC13.

Stylus COLOR 440, 640:

Replace IC15

Stylus COLOR 740:

Replace IC12 or IC13.

Page 91

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

3.5 Repair of the Printer Mechanism

This section provides instructions for repairing the printer mechanism. It describes various problems, likel

mptom in th e t able below a nd c heck for malf unctioning parts as

s describe d in the checkpoint.

Symptom Condition Cause Checkpoint Solution

Abnormal pump mechanism oper ati on

Ink is not a bsor bed or i s poorly absorb ed.

Abnormal carri age operation.

causes, and solutions. Look up the

Table 3-7. Repair of the Printer Mechanism

Abnormal PF motor operation when the power is turned on.

Used ink does not go through the waste ink tube.

The carriage doesn’ t travel smoothly on the carriage guide sha ft , or moves irregularly.

Foreign substanc es are lodged in the PF gears.

The PF motor is defective. (Refer to Table 3-1 The pump tube is crushed. Inspect the tube. Use compressed air to fix the

Capping rubber is damaged or deformed.

The tube has pulled loose from the cap.

Air bleed valve does not close properly.

Foreign substance in the CR drive gear.

CR motor is defective. Check motor coil resistance. Replace the CR motor. Carriage movement is not

smooth.

Manually turn the platen drive gear and check whether it ro tates normally.

Check the coil resistance. Replace the PF motor.

)

Inspect the capping rubber. Replace the capping mechanism.

Inspect the tube’ s attachment to the ca p. Connect the tube properly.

Check bleed valve operation by hand. Replace the capping mechanism.

Check for foreign substances. Remove foreign substances.

Check whether the carriage moves smoothly when moved manual ly.

Check tension of the timing belt. Adjust t ension mechanism or replace

Check for foreign s ubstance s in the carri age path.

Remove any foreign subst ances.

crushed part.

Clean and lubricate the carriage guide shaft.

it. Remove foreign substances.

Page 92

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

Table 3-7. Repair of the Printer Mechanism (continued)

Symptom Condition Cause Checkpoint Solution

Abnormal printing A particular dot

consistently causes abnormal printing.

A particular dot sometimes fails to print.

Black specks or dots appear.

A vertical line is not aligned.

White lines appears on the printed page.

Printhead surface is not clean (dot missi ng).

The printhead is defective. Perform the cleaning operation several

The pad in the capping mechanism is touching the head surface.

Print head surface is not clean (dot missi ng).

The head FFC is defectiv e (open circuit ).

The head FFC is loosely connected.

The printhead is defective. Perform the cleaning operation several

The ink cartridge is defective.

The head FFC is loose. Check if the FFC is securely connected to

The printhead is detective. Check connection with the head FFC. Replace the head if there is no

Bi-directional alignment is out of adjustment .

Head angle is not correct. Perfor m the head angle adjustment. Refer to “

Platen gap is not correct. Perform the platen gap (parallelism)

Ink jet is deflected by foreign subst ances on the printhead.

Ink cartridge is def ective. Insta ll a new ink car tridge and perform the

Printhead is defective. Perform the cleaning operation several

Perform the cleaning operation several times and check printing.

times and check printing. Check to see i f t he pad is def ormed or o ut of

position.

Perform the cleaning operation several times and print a sel f-test.

Check the FFC with a meter. Replace the head FFC.

Check if the FFC is securely connected to the board and carriage.

times and check the printing after each cleaning.

Install the new ink cartridge and perform self-test.

the board and carriage.

Perform the Bi-D adjustment. Refer to “Bi-D Adjustment” in Section

adjustment. Perform the cleaning operation several

times and check printing.

self-test.

times and check printing.

Perform the cleaning operation.

If condition does not improve even after the cleaning, replace the head.

Replace or reposition the pad.

Perform the cleaning.

Connect the FFC properly.

If the condition does not improve even after several cleaning operations, replace the printhead.

Replace the ink cartri dge.

Connect the FFC properly.

connection probl em wit h the FFC.

5.2.2.10. Head Angle Adjustment” in

Section 5.2.2.9.

Refer to “

Section 5.2.1.

Perform the cleaning operation.

Replace the ink cartri dge.

If printing fails to improve after cleaning the printhead, replace the printhead.

Parallelism Adjustment” in

Page 93

EPSON Stylus COLOR 440, 640, and 740 Chapter 3 Troubleshooting

Table 3-7. Repair of the Printer Mechanism (continued)

Symptom Condition Cause Checkpoint Solution

Printing is not performed.

Abnormal paper feeding.

Printer stops during initialization.

The carriage moves, but no printing is performed.

Paper does not feed. PF roller experiencing

Fatal error appears. ASF sensor is defecti ve. Check the signal level of the ASF sensor.

Head FFC is loose. Check for proper connection. Connect the FFC properly. The FFC is defective. Check the FFC by using a tester. Also,

examine visually for burn marks.

Ink cartrid ge is defective. Install a new cartridge and perform the self-

test.

Printhead is defective. If the condition does not improve even after

performing two or three cleaning cycles, replace the printhead and perform the selftest.

Check if the PF roller rotates when paper is friction with bushing or with adjacent parts .

Abnormal operati on of t he auto-sheet feed er.

Malfunctioning ASF transmission.

PE sensor is defective. Check the signal level of the PE sensor.

HP sensor is defective. Check the signal level of the HP sensor.

Printhead FFC is disconnected.

CR motor is defective. Check that the CR motor cable is

PF motor is defective. Check that the PF motor cable is

not fed.

Check movement of the ASF by hand. Replace ASF.

Check to see if the transm ission gears

rotate. Push ag ain st t he sheet feeder c lutch

and check to see if the gear s me sh

properly.

(See Table 3-2

Check if the FFC is disconnected. Reconnect the FFC.

connected.

Replace the FFC.

Replace the ink cartri dge.

Replace the printhead.

Clean the PF roller by using a cleaning sheet. Replace the PF roller if it does not recover.

Replace the gears or the transmission mechanism.

Replace ASF sensor.

Replace PE sensor.

Replace HP sensor.

Replace the CR motor if there is no problem with the cable connection.

Replace the PF motor if there is no problem with the cable connection.

Page 94

DISASSEMBLY AND ASSEMBLY





Page 95

EPSON Stylus COLOR 440, 640, and 740 Chapter 4 Disassembly and Assembly

jury

ging

y.)

4.1 Overview



Disconnect the power cable before taking apart the printer.



Wear protective g oggles t o protect your ey es f rom ink and flying springs. If ink g ets i n your ey es, f lus h your eyes with water and s ee a doctor im mediatel y.



If ink comes into contact with your skin, wash it off with soap and water. If irritation occurs, contact a physician.



A lithium battery is installe d on the main board of t his printer. Be sure to observe the following precautions when handling the battery:



Keep the batter batterie s to av oid shortin



Do not heat the batter



Do not solder onto an

cause the battery to leak ele ctrolyte, burn, or

ma explode. Leaka the batter



Do not char



Do not dismantle the batter harmful



Do not inst all t he batter



To avoid explosion, replace only with the same or equivalent type recommended by the manufacture. Dispose of used batteries according to local laws and regulations.

as or explo de.

away from met al objects or oth er

it out.

or put it in fire.

part of the battery. (Doing so

e may damage other devices cl ose to

e the battery, or it may explode.

, because it may release

backwards.

This chapter tells you how to disassemble the main components of the EPSON St can reassemble the components b took them apart. Before disassemblin for special c autions under the hea din

ou must perform any adjustments listed under “REQUIRED

ADJUSTMENT.”

lus Color 4 40, 640, and 740. Unless otherwis e noted, you

reversing the order in which you

or reassembling any unit, look

“CAUTION.” After reassembly,

NOTE: Unless stated otherwise, the terms “left” and “right” as

used in thi s ch apter refe r to th e l eft and right sides of the printer as viewed from the front.

4.1.1

Before servicing the printe r, re ad the instru c ti ons below under “WARNING” and “CAUTION.” The warnin mistakes that could result in in to avoid da m a

Precautions for Disassembling the Printer

s tell you how to avoid

or death. The c autions te ll you how

the printer .

W ARNING

Page 96

EPSON Stylus COLOR 440, 640, and 740 Chapter 4 Disassembly and Assembly

4.1.2 Tools



CAUTIO N

If an ink cartridge is removed and needs to be installed again, be sure to replace it with a new ink cartridge for the following reasons:

Table 4-1 lists the to ols rec ommended for serv ic ing the printer . Us e onl

tools that meet these specifications.



Once an ink cartrid cartrid

e and creat es bubbles. T hes e bubbles cl og

the ink pa t h and cause printin



If the same ink cartri d

e is removed, air enters t he

problems .

e is reuse d, t he printer will not be able to keep track of actual ink consumption, since the ink consumpti on c ounter will be cleared .



Do not remove the ink cartridges when you ship the printer.



Never remove the ink cartridges, unless this manual specifically tells you to do so.



Use only recommended tools for disassembling, assembling, and adjusting the printer.



Apply lubricants and adhesives only as specified. (See Chapter 6 for details.)



Make all required adjustments after taking apart the printer. (See Chapter 5 for details.)

Table 4-1. Tool List

Tools

Philips scewdriver No.1 yes B743800400 Philips screwdriver No.2 yes B743800200 Tweezers yes B741000100 Hexagonal box dri ver (5.5 mm)

Commercially

Available

yes B741700100

EPSON Part No.

Page 97

EPSON Stylus COLOR 440, 640, and 740 Chapter 4 Disassembly and Assembly

4.1.3 Specificati on for Screws

Table 4-2 s hows screw sp ec if ic ations. During assembly, make sure to insert the c orrect screw at eac h location. N ot e t hat t he screw numbers referred to in t he manual (e.g., “#1”) correspo nd to the num bers of the screw t

pes shown in the table, not to screw sizes.

Table 4-2. Screw Characteristic

Type Number Body Name Size

1 Cross bind-head,

S-tight

2 Cross bind-head,

S-tight

3 Cross bind-head,

P-tight (CBP tight)

4 Cross bind-head,

P-tight (CBP tight)

5 Cross bind-head,

P-tight (CBP tight)

6 Cross pan-head

(CP)

7 Cross bind-head,

S-tigh t, Sems R2 (CBS Sems)

Page 98

EPSON Stylus COLOR 440, 640, and 740 Chapter 4 Disassembly and Assembly

4.1.4 Service Checklist

Before returning the printe r af te r s erv ic ing, you may wish to use the checklis t be low to make s ure the printer is in

Category Component Item to check I s Check Required?

Printer Self-test Is the operation normal?

On-line test Was the on-line test succes sful? Printhead Is ink ejected normally from all nozzles? Carriage mechanism

Paper feeding mechanism

Adjustments Specified adjustment items Are adjusted condit ions all right? Lubricati on Specified lubrication items Is lubrication applied to the specified locations?

System program PROM Does it have the newest version? Shipping Ink cartridges Are the ink cartridges installed correctly?

Packaging Are all loose parts firmly fixed?

Miscellaneous User’s belongings Are all the user’s belongings included?

ood condition.

Table 4-3. Inspection C h ecklist fo r the Repaired Printer

Does the carriage move sm oothly? Any abnormal noise during movement? Any dirt or obstructions around the carriage guide

shaft? Is the CR motor at the correct t em perature

(not overheating)? Is paper fed smoothly? Does paper get jammed? Does paper get skewed during paper feeding? Does more than one sheet of paper f eed at a

time? Does the PF motor get overheat ed? Any abnormal noise duri ng paper feeding? Is the paper path clear of all obstructions?

Is the quantity of lubrication neither too much nor too little?



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary



Checked / Not necessary

Page 99

EPSON Stylus COLOR 440, 640, and 740 Chapter 4 Disassembly and Assembly

4.2 Disassembly Procedures

The flowchart below shows the order of disassembly.

Remove the Housing

Refer to

4.2.1

Remove the Control Panel

4.2.3

Remove the Pump and Capping Assemblies

4.2.4.3

Remove the Waste Ink Drain Pad Assembly

4.2.4.2

Remove the Left Front Panel

4.2.3

Remove the PF Motor

4.2.4.5

Remove the

Front Panels

4.2.3

Remove the CR Motor

4.2.4.4

Remove the Board Assembly

4.2.2

Remove the Printhead

4.2.4.1

Disassemble the Printer Mechanism

4.2.4

Remove the ASF

4.2.4.6

Disassemble the ASF

4.2.4.6.1

Disassemble the ASF Roller Assemblies

4.2.4.6.2

Remove the CR Assembly

4.2.4.7

Remove the PF and Paper Eject Roller Assemblies

4.2.4.8

Remove the PE Sensor

4.2.4.9

Remove the HP Sensor

4.2.4.10

Figure 4-1. Disassembly Flowchart

Page 100

EPSON Stylus COLOR 440, 640, and 740 Chapter 4 Disassembly and Assembly

(

4.2.1 Removin g the H ousing

The printe r does not hav e a lower hou s ing. Therefore, t he printer mechanism is full

1. Open the printer cov er and turn the PG ad the + side

2. Take out the 4 screws housin

CAUTIO N

up to remove it.

Be careful not to catch the housin g on the ink cartridge

exposed a fter you remov e the uppe r housing.

ustment lever towards

toward the rear).

No. 2) securing the housing, and lift th e

clamps. If you release a clamp, it could cause air to invade the ink cartridge.

(No.2)

Housing

Figure 4-2. Removing the Housing

Epson Stylus Color 740, Stylus Color 640, Stylus Color 440 Service Manual

PRECAUTIONS

Table of Contents

PRODUCT DESCRIPTION

1.1 Features

1.2 Specifications

1.2.1 Printing Specifications

1.2.2 Paper Specifications

1.2.3 Printable Are a

1.2.4 Ink Cartridge Specifications

1.2.5 Environmental Conditions

1.2.6 Electrical Specifications

1.2.7 Reliability

1.2.8 Sa fe ty App r ov als

1.2.9 CE Ma rk in g

1.3 Interface Specifications

1.3.1 Parallel Interface (Forward Channel)

1.3.2 Parallel Interface (Reverse Channel)

1.3.3 Serial Interface (Stylus COLOR 740 only)

1.4 Control Panel

1.4.1 Ind ica to r s (LEDs )

1.4.2 Control Panel Functions

1.4.3 LED Indicators and Printer States

1.5 Error Conditions

1.5.1 Ink Out

1.5.2 Paper Out

1.5.3 Pa pe r Jam

1.5.4 No Ink Cartridge

1.5.5 Maintenance Request

1.5.6 Fatal Errors

1.6 Pr in te r In itialization

1.7 Initialization Settings

1.8 Main Components

1.8.1 Printer Mechanism

1.8.2 C206 MAIN-B Board (Stylus COLOR 440)

1.8.3 C256 MAIN Board (Stylus COLOR 640)

1.8.4 C257 MAIN Board (Stylus COLOR 740)

1.8.5 Powe r Sup pl y Board C206 PSB/PSE (Stylus COLOR 440 and 640) C257 PSB/PSE (Stylus COLOR 740)

1.8.6 C206 PNL Board (Stylus COLOR 440 and 640)

1.8.7 C209 PNL Board (Stylus COLOR 740)

OPERATING PRINCIPLES

2.1 Printer Mechanism

2.1.1 Printhead

2.1.2 Carriage Mechanism

2.1.3 Platen Gap and Parallelism Adjustment Mechanisms

2.1.4 Carriage Lock Mechanism

2.1.5 Pa pe r Fe ed Mot or

2.1.6 Paper Handling

2.1.7 Ink System

2.2 Electronic Circuit Boards

2.2.1 Power Supply Board

2.2.2 Main Circuit Board

TROUBLESHOOTING

3.1 Troubleshooting

3.1.1 Component Test Specifications

3.2 Unit Level Troubleshooting

3.2.1 Printer Does Not Turn On

3.2.2 Error Indicated by LEDs

3.2.3 Printing Failure

3.2.4 Paper Not Feedin g Correctly

3.2.5 Control Panel Operation is Abnormal

3.3 Unit Repair of the Power Supply Board

3.4 Unit Repair of the Main Board

3.5 Repair of the Printer Mechanism

DISASSEMBLY AND ASSEMBLY

4.1 Overview

Precautions for Disassembling the Printer

4.1.2 Tools

4.1.3 Specificati on for Screws

4.1.4 Service Checklist

4.2 Disassembly Procedures

4.2.1 Removin g the H ousing