Epson Stylus CX3700, Stylus CX3800, Stylus CX3805, Stylus CX3810, Stylus DX3800 Service Manual

...

Download

Page 1

SERVICE MANUAL

Color Inkjet Printer

EPSON Stylus CX3700/CX3800/CX3805/

CX3810/DX3800/DX3850

SEIJ05-012

Page 2

Notice:

photocopying, recording, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION.

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

 All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being

informed of them.

 The above not withstanding SEIKO EPSON CORPORATION can assume no responsibility for any errors in this manual or the consequences thereof.

EPSON is a registered trademark of SEIKO EPSON CORPORATION.

General Notice:Other product names used herein are for identification purpose only and may be trademarks or registered trademarks of their

respective owners. EPSON disclaims any and all rights in those marks.

I&I CS/Quality Management & PL Department

Page 3

PRECAUTIONS

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

DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing procedures

preceded by DANGER Headings.

WARNING Signals a precaution which, if ignored, could result in damage to equipment.

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

DANGER

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

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

3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.

4. WHEN DISASSEMBLING OR ASSEMBLING A PRODUCT, MAKE SURE TO WEAR GLOVES TO AVOID INJURIER FROM METAL PARTS WITH SHARP EDGES.

WARNING

1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN.

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

3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS.

4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.

5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS BY THE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE ICs OR OTHER NON-APPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY.

6. WHEN USING COMPRESSED AIR PRODUCTS; SUCH AS AIR DUSTER, FOR CLEANING DURING REPAIR AND MAINTENANCE, THE USE OF SUCH PRODUCTS CONTAINING FLAMMABLE GAS IS PROHIBITED.

Page 4

About This Manual

This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of the printer. The instructions and procedures included herein are intended for the experienced repair technicians, and attention should be given to the precautions on the preceding page.

Manual Configuration

This manual consists of six chapters and Appendix.

CHAPTER 1. PRODUCT DESCRIPTIONS

Provides a general overview and specifications of the product.

CHAPTER 2. OPERATING PRINCIPLES

Describes the theory of electrical and mechanical operations of the product.

CHAPTER 3. TROUBLESHOOTING

Describes the step-by-step procedures for the troubleshooting.

CHAPTER 4. DISASSEMBLY / ASSEMBLY

Describes the step-by-step procedures for disassembling and assembling the product.

CHAPTER 5. ADJUSTMENT

Provides Epson-approved methods for adjustment.

CHAPTER 6. MAINTENANCE

Provides preventive maintenance procedures and the lists of Epsonapproved lubricants and adhesives required for servicing the product.

CHAPTER 7. APPENDIX

Provides the following additional information for reference:

• Connector Summary

• Exploded Diagram

• Parts List

• Electrical Circuits

Symbols Used in this Manual

Various symbols are used throughout this manual either to provide additional information on a specific topic or to warn of possible danger present during a procedure or an action. Be aware of all symbols when they are used, and always read NOTE, CAUTION, or WARNING messages.

A D J U S T M E N T

R E Q U I R E D

C A U T I O N

C H E C K

P O I N T

W A R N I N G

Indicates an operating or maintenance procedure, practice or condition that, if not strictly observed, could result in injury or loss of life.

Indicates an operating or maintenance procedure, practice, or condition that, if not strictly observed, could result in damage to, or destruction of, equipment.

May indicate an operating or maintenance procedure, practice or condition that is necessary to accomplish a task efficiently. It may also provide additional information that is related to a specific subject, or comment on the results achieved through a previous action.

I.ndicates an operating or maintenance procedure, practice or condition that, if not strictly observed, could result in injury or loss of life.

Indicates that a particular task must be carried out according to a certain standard after disassembly and before re-assembly, otherwise the quality of the components in question may be adversely affected.

Page 5

Revision Status

Revision Issued Date Description

A Aug 10, 2005 First Release

Page 6

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

CONTENTS

Chapter 1 PRODUCT DESCRIPTION

1.1 Overview ............................................................................................................... 9

1.1.1 Features......................................................................................................... 9

1.2 Specifications ...................................................................................................... 10

1.2.1 Printer specifications .................................................................................. 10

1.2.2 Scanner Specifications................................................................................ 18

1.2.3 Common ..................................................................................................... 19

1.3 Interface............................................................................................................... 21

1.3.1 USB Interface ............................................................................................. 21

1.4 Stand-alone Copy ................................................................................................ 22

1.4.1 Basic Specifications.................................................................................... 22

1.4.2 Copy Speed................................................................................................. 23

1.4.3 Configuration for Copying ......................................................................... 23

1.4.4 Relation between Original and Copy.......................................................... 24

1.5 Control Panel ....................................................................................................... 27

1.5.1 Buttons........................................................................................................ 27

1.5.2 Indicators .................................................................................................... 27

1.5.3 Operations................................................................................................... 29

1.5.4 Printer Condition and Panel Status ............................................................. 31

1.5.5 Memory Functions...................................................................................... 33

1.5.6 Printer Initialization (T.B.D) ...................................................................... 34

Chapter 2 OPERATING PRINCIPLES

2.1 Overview ............................................................................................................. 36

2.2 Printer Mechanism .............................................................................................. 36

2.2.1 Printer Mechanism...................................................................................... 36

2.2.2 Print Head ................................................................................................... 37

2.2.3 Carriage Mechanism................................................................................... 39

2.2.4 Paper Loading/Feeding Mechanism ........................................................... 41

2.2.5 Ink System Mechanism .............................................................................. 46

2.2.6 Ink Sequence............................................................................................... 49

2.3 Scanner Mechanism ............................................................................................ 51

2.3.1 Scanner Carriage Mechanism..................................................................... 51

2.4 Electrical Circuit Operating Principles................................................................ 53

2.4.1 PSB/PSE Board .......................................................................................... 53

2.4.2 C612 Main Board ....................................................................................... 54

Chapter 3 TROUBLESHOOTING

3.1 Overview ............................................................................................................. 62

3.2 Error Indications and Fault Occurrence Causes .................................................. 62

3.3 Troubleshooting................................................................................................... 66

3.3.1 Superficial Phenomenon-Based Troubleshooting ...................................... 84

Page 7

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Chapter 4 DISASSEMBLY/ASSEMBLY

4.1 Overview ............................................................................................................. 93

4.1.1 Precautions.................................................................................................. 93

4.1.2 Tools ........................................................................................................... 93

4.1.3 Work Completion Check ............................................................................ 94

4.2 Caution regarding Assembling/Disassembling of the Printer Mechanism, and

How to Ensure of Quality on Re-assembled Product.......................................... 95

4.3 Disassembly Procedures...................................................................................... 96

4.4 Printer Section ..................................................................................................... 97

4.4.1 Document Cover/Document Cover Mat/ASF Cover.................................. 97

4.4.2 Paper Support Assy..................................................................................... 98

4.4.3 Stacker Assy. .............................................................................................. 98

4.4.4 Scanner Unit ............................................................................................... 99

4.4.5 Panel Unit ................................................................................................. 100

4.4.6 Housing, Upper......................................................................................... 101

4.4.7 Printhead ................................................................................................... 102

4.4.8 Printer Mechanism.................................................................................... 104

4.4.9 PS Board Unit ........................................................................................... 107

4.4.10 Waste Ink Pads/Stacker Lock/Rubber Feet ............................................ 108

4.4.11 Main Board Unit ..................................................................................... 111

4.4.12 ASF Unit................................................................................................. 113

4.4.13 Holder Shaft Unit.................................................................................... 115

4.4.14 Spur Gear 36.8/Extension Spring 0.143/Clutch ..................................... 116

4.4.15 PE Sensor Board/PE Sensor Lever......................................................... 117

4.4.16 CR Guide Frame ..................................................................................... 118

4.4.17 CR Motor ................................................................................................ 119

4.4.18 PF Motor................................................................................................. 120

4.4.19 Carriage Unit/CR Encoder Board/PW Sensor Board/Head FFC ........... 121

4.4.20 Paper Guide Upper Unit ......................................................................... 124

4.4.21 EJ Frame Unit ......................................................................................... 125

4.4.22 Ink System Unit ...................................................................................... 126

4.4.23 Paper Guide Front Unit........................................................................... 127

4.4.24 PF Roller Unit......................................................................................... 128

4.5 Scanner Section ................................................................................................. 129

4.5.1 Scanner Housing, Upper........................................................................... 129

4.5.2 Scanner Carriage Unit............................................................................... 130

4.5.3 Scanner Motor Unit/Scanner HP Sensor/Driven Pulley ........................... 132

Chapter 5 ADJUSTMENT

5.1 Overview ........................................................................................................... 134

5.1.1 Required Adjustments .............................................................................. 134

5.2 Adjustment by Using Adjustment Program ...................................................... 137

5.2.1 EEPROM Data Copy................................................................................ 137

5.2.2 Market Setting .......................................................................................... 137

5.2.3 USB ID Input............................................................................................ 137

5.2.4 Waste Ink Pad Counter ............................................................................. 137

5.2.5 Ink Charge ................................................................................................ 138

5.2.6 Head ID Input ........................................................................................... 138

5.2.7 Top Margin Adjustment ........................................................................... 138

5.2.8 First Dot Adjustment ................................................................................ 138

5.2.9 Head Angular Adjustment........................................................................ 139

5.2.10 Bi-D Adjustment..................................................................................... 140

5.2.11 CR Offset................................................................................................ 140

5.2.12 PF Band Adjustment (TBD) ................................................................... 140

5.3 Adjustment Except Adjustment Program.......................................................... 141

5.3.1 PG Adjustment ......................................................................................... 141

5.3.2 PF Scale Sensor Positioning Adjustment ................................................. 144

5.3.3 Original Adjustment ................................................................................. 145

Chapter 6 MAINTENANCE

6.1 Overview ........................................................................................................... 149

6.1.1 Cleaning.................................................................................................... 149

6.1.2 Service Maintenance................................................................................. 149

6.1.3 Lubrication................................................................................................ 151

Chapter 7 APPENDIX

7.1 Connector Summary.......................................................................................... 156

7.1.1 Major Component Unit............................................................................. 156

7.2 Exploded Diagram............................................................................................. 159

7.3 Parts List............................................................................................................ 165

7.4 Electrical Circuits .............................................................................................. 167

Page 8

PRODUCT DESCRIPTION

CHAPTER

Page 9

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.1 Overview

This unit features 3-in-1 functionality (computer-connected printer, scanner, and standalone copy machine) and is designed for home/personal use. Its main functions are described below.

1.1.1 Features

 Printer functions

As a printer, this unit achieves high-quality output at high speed on plain paper, and uses new pigment ink for improved light fastness, water fastness, gas fastness, and rubbing fastness. It includes the following features.

 Maximum print resolution: 2880 (H) x 1440 (V) dpi

 Separate ink cartridge for each color

 ASF (Auto Sheet Feeder) holds up to 100 cut sheets (64 g/m

 Border-free printing with EPSON specialty media

 Reduced noise level

 Fast and thick draft mode with the combination of real black and composite

black

 Scanner functions

Use of a CIS sensor means no warm-up period is required, which makes scanning more convenient and allows for a more compact scanner. Additional features include the following.

)

 Enlarge / Reduce factor can be selected from two options; actual size (100%)

or “Fit to page”.

 Copy margin is automatically selected from three options, related to paper

type and paper size; 3mm, “Small Margins Copy”, or “Border Free Copy”.

 Fast and thick draft mode with the combination of real black and composite

black

 Scan functions

This unit provides scan mode so that data can be scanned and transferred to a connected computer or to e-mail via application software like EPSON SMART PANEL.

 Simultaneous use of functions

Printer functions and scanner functions are independent and can therefore be operated simultaneously from a connected computer.

 Easy operation panel

The unit has a simple operation panel equipped with seven buttons including power button and LEDs, and provides basic functions only for easy operation.

 Exterior design

Use of a CIS scanner engine has enabled a more compact design. Also, this unit has operation panel on the left side, which becomes more distinctive but still easier to use.

 Maximum optical resolution: 600 x 1200 dpi

 Scan gradations: 48 bits (input), 24 bits (output)

 Stand-alone copy functions

It benefits from using a more recently developed type of ink which enables photoquality copies to be made not only on special media but even on plain paper. Only the basic copy functions are provided for easier operation.

 Paper size can be selected from two options.

Table 1-1. Paper Size

Paper Size Model

Letter/4"x6" EAI

A4/10x15 Europe/Asia

Figure 1-1. External View

PRODUCT DESCRIPTION Overview 9

Page 10

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.2 Specifications

1.2.1 Printer specifications

This section covers specifications of the printer.

1.2.1.1 Physical Specification

 Weight

 5.7 kg (without the ink cartridges)

 Dimension (Including rubber feet, excluding loading tray)

 430 mm (W) x 345 mm (D) x 172 mm (H)

1.2.1.2 Printing Specification

 Print Method

 On-demand ink jet

 Nozzle Configuration

 Monochrome: 90 nozzles

 Color: 29 nozzles x 3 (Cyan, Magenta, Yellow)

2.822 (40/360 inch)

A#90D#29

D#28 A#89

A#63

D#2

D#1

A#62

A#61

A#60

C#29

A#33

C#2

C#1

A#32

A#31

A#30

Paper Fees Direction

B#29

A#3

B#2

A#2

B#1

A#1

0.2117 (1/120 inch)

 Print Direction

 Bi-directional minimum distance printing (with logic seeking)

 Print Resolution

Table 1-2. Print Resolution

Horizontal Direction (Across Columns) Vertical Direction (Paper Feed)

360 dpi 120 dpi

360 dpi 360 dpi

360 dpi

720 dpi

1440 dpi 720 dpi

5760 dpi

720 dpi

Note " *" : Those resolution can only be used with the printer driver.

 Print Speed & Printable Width

Table 1-3. Character Mode

Character Pitch Printable Columns CR Speed

10 CPI (Pica) 80 285 CPS*

Note " *" : CPS: Characters/Second

This speed is when using normal dot printing mode.

Table 1-4. Graphics Mode (Standard)

Horizontal Resolution Printable Area Max. Dot Count CR Speed

360 dpi* 209.8 mm (8.26") 2976 285 cps

360 dpi 209.8 mm (8.26") 2976 285 cps

720 dpi 209.8 mm (8.26") 5952 285 cps

1440 dpi 209.8 mm (8.26") 11904 285 cps

2880 dpi 209.8 mm (8.26") 23808 285 cps

Note " *" : Draft Printing

Carriage Moving Direction

Figure 1-2. Nozzle Configuration

PRODUCT DESCRIPTION Specifications 10

Page 11

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 1-5. Graphics Mode (Border-free Printing)

Horizontal Resolution Printable Area Max. Dot Count CR Speed

360 dpi* 215.05 mm (8.46") 3048 285 cps

720 dpi 215.05 mm (8.46") 6096 285 cps

1440 dpi 215.05 mm (8.46") 12192 285 cps

2880 dpi 215.05 mm (8.46") 24384 285 cps

Note " * ": Except Draft Printing

 Control Code

 ESC/P Raster command

 EPSON Remote command

 ESC/P-R Level-1 command

 Internal fonts

 Character code: Alphanumeric with expanded graphics (PC437)

ASCII, 20H to 7FH only

 Fonts: EPSON original fonts

Alphanumeric font: Courier

 Input buffer size

 64 Kbytes

1.2.1.3 Paper Feed Specifications

 Paper feed method

Friction feed, using one ASF (Auto Sheet Feeder)

 Paper path

Top feed, front out

1.2.1.4 Paper Support

 Cut sheets

Paper Size

A4 210 mm 297 mm

A5 148 mm 210 mm

B5 182 mm 257 mm

Letter

Legal

Half Letter

User defined 50.8-329 mm

C A U T I O N

 Poor quality paper may reduce print quality and cause paper

 It is necessary that there is no wrinkle, nap, tear, fold, and so on

 The curve of form must be 5 mm or below.  Use paper under normal conditions

Dimensions

Width Length

215.9 mm (8.5")

139.7 mm (5.5")

jams or other problems. If you encounter problems, switch to a higher grade paper.

in the form.

• Temperature 15 to 25°C (59 to 77°F)

• Humidity 40 to 60% RH

Table 1-6. Cut Sheets

Thickness Weight Paper Type

279.4 mm (11")

355.6 mm (14")

215.9 mm

(8.5")

127-1117.6

0.08-0.11 mm

64-90 g/m (17-24(lb))

Plain paper

Recycled paper

 Paper feed rates

 98.8 mm/sec (3.89 inch/sec): high quality mode, 19.05-mm feed

 352.8 - 6.35 mm/sec (13.89-0.25 inch/sec):high speed mode, continuous feed

 PF interval

Programmable in 0.0176 mm (1/1440 inch) steps

PRODUCT DESCRIPTION Specifications 11

Page 12

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

 Envelopes

Table 1-7. Envelopes

Paper Size

No.10 *

DL *

C6 *

Note *1: Check that the flap is on the long edge and can be folded.

C A U T I O N

 Use paper under normal conditions

Dimensions

Thickness Weight Paper Type

Width Length

241.3 mm (9.5")

220 mm 110 mm

104.8 mm (4.125")

N/A

162 mm 114 mm

• Temperature 15 to 25°C (59 to 77°F)

• Humidity 40 to 60% RH

75-90g/m

(20-24(lb))

 Poor quality paper may reduce print quality and cause paper

jams or other problems. If you encounter problems, switch to a higher grade of paper.

 It is necessary that there is no wrinkle, nap, tear, fold, so on in

the form.

 Don't use the adhesive envelopes.  Don't use sleeve insert envelopes and cellophane window

envelopes.

Bond paper

Air mail

PPC

 Exclusive papers

Quality: EPSON Exclusive paper

Item Size

Premium Ink Jet Plain

Paper

Bright White Ink Jet

Paper

Photo Quality Self Adhesive Sheets

Premium Glossy Photo Paper

Premium Semigloss Photo Paper

Matte PaperHeavyweight

Double-sided Matte

Paper

Economy Photo

Paper

Glossy Photo Paper

Letter 215.9 279.4

8” x 10” 203.2 254

5” x 7” 127 178

4” x 6” 101.6 152.4

Letter 215.9 279.4

4” x 6” 101.6 152.4

Letter 215.9 279.4

8” x 10” 203.2 254

Letter 215.9 279.4

4” x 6” 101.6 152.4

Table 1-8. Exclusive Papers

Width

(mm)

A4 210 297 0.11 80

A4 210 297 0.13 92.5

A4 210 297 0.13 102

A4 210 297

3R 89 127

A4 210 297

A4 210 297 0.23 188

Length

(mm)

Thickness

(mm)

0.27 255

0.27 250A4 210 297

0.23 157A4 210 297

0.25 178

0.23 188

Weight

(g/m

)

Note *1 : Not supported with stand-alone functions of copy and memory card print.

*2: Only for EAI model.

PRODUCT DESCRIPTION Specifications 12

Page 13

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

C A U T I O N

 Use paper under normal conditions.

• Temperature 15 to 25°C (59 to 77°F)

• Humidity 40 to 60% RH

 Poor quality paper may reduce print quality and cause paper

jams or other problems. If you encounter problems, switch to a higher grade of paper.

 It is necessary that there is no wrinkle, nap, tear, fold, and so on

in the form.

 The curve of form must be 5mm or below.

1.2.1.5 Printing Area

 Cut sheet (standard printing)

 Printable area

The print quality is guaranteed for the print area above the 3 mm bottom margin. For paper width (PW) and paper length (PL), refer to “1.2.1.4 Paper

Support” (p.11).

Refer to the following table. As for each margin area, refer to Figure 1-3

(p.14).

Table 1-9. Applicable Paper/Printing Area

Paper Type

Letter

Legal

Cut sheets

Half Letter

User defined

Premium Ink Jet Plain Paper

Bright White Ink Jet Paper

Photo Quality Self Adhesive Sheets

Premium Glossy Photo Paper

Premium Semigloss Photo Paper

Matte Paper-Heavyweight

Exclusive papers

Double-sided Matte Paper

Economy Photo Paper

Glossy Photo Paper

Left

Margin

3 mm

(0.12")

3 mm

(0.12")

Right

Margin

3 mm

(0.12")

3 mm

(0.12")

Top

Margin

3 mm

(0.12")

3 mm

(0.12")

Bottom Margin

3 mm

(0.12")

3 mm

(0.12")

PRODUCT DESCRIPTION Specifications 13

Page 14

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Printable area

Paper Feed Direction

Figure 1-3. Printable Area Cut Sheet (Standard Printing)

 Cut sheet (border-free printing)

 Printable area

For paper width (PW) and paper length (PL), refer to “1.2.1.4 Paper Support ”

(p.11).

Refer to the following table. As for each overhang area, refer to Figure 1-4

(p.15).

Table 1-10. Applicable Paper/Printing Area (For Printing)

Paper Type Size

Letter 2.54 2.54 2.96 4.02

A4 2.54 2.54 2.96 4.02

Premium Glossy Photo Paper

Premium Semigloss Photo Paper

Exclusive paper

Matte Paper-Heavyweight

Double-sided Matte Paper

Economy Photo Paper A4 2.54 2.54 2.96 4.02

Glossy Photo Paper

8” x 10” 2.54 2.54 2.96 4.02

5” x 7” 2.54 2.54 2.96 4.02

4” x 6” 2.54 2.54 2.82 3.60

3R 2.54 2.54 2.82 3.60

Letter 2.54 2.54 2.96 4.02

A4 2.54 2.54 2.96 4.02

4” x 6” 2.54 2.54 2.82 3.60

Letter 2.54 2.54 2.96 4.02

A4 2.54 2.54 2.96 4.02

8” x 10” 2.54 2.54 2.96 4.02

Letter 2.54 2.54 2.96 4.02

A4 2.54 2.54 2.96 4.02

Letter 2.54 2.54 2.96 4.02

4” x 6” 2.54 2.54 2.82 3.60

Left

Overhang

Right

Overhang

Top

Overhang

Bottom

Overhang

PRODUCT DESCRIPTION Specifications 14

Page 15

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 1-11. Applicable Paper/Printing Area (For Copying)

Paper Type Size

Letter N/A N/A N/A N/A

A4 N/A N/A N/A N/A

Premium Glossy Photo Paper

Premium Semigloss Photo Paper

Exclusive paper

Matte Paper-Heavyweight

Double-sided Matte Paper

Economy Photo Paper A4 N/A N/A N/A N/A

Glossy Photo Paper

8” x 10” N/A N/A N/A N/A

5” x 7” N/A N/A N/A N/A

4” x 6” 2.54 2.54 2.96 5.08

3R 2.54 2.54 2.96 5.08

Letter N/A N/A N/A N/A

A4 N/A N/A N/A N/A

4” x 6” 2.54 2.54 2.96 5.08

Letter N/A N/A N/A N/A

A4 N/A N/A N/A N/A

8” x 10” N/A N/A N/A N/A

Letter N/A N/A N/A N/A

A4 N/A N/A N/A N/A

Letter N/A N/A N/A N/A

4” x 6” 2.54 2.54 2.96 5.08

Left

Overhang

Right

Overhang

Top

Overhang

Bottom

LO ROPW

Paper size

Paper Feed Direction

Printable area

Figure 1-4. Printable Area for Cut Sheet (Border-free Printing)

PRODUCT DESCRIPTION Specifications 15

Page 16

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

 Envelopes

 Printable area

For paper width (PW) and paper length (PL), refer to “ 1.2.1.4 Paper Support ”

(p.11).

Refer to the following table. As for each margin area, refer to Figure 1-5

(p.16).

Table 1-12. Applicable Paper/Printing Area

Paper Type Left Margin Right Margin Top Margin Bottom Margin

No.10

5 mm (0.20") 5 mm (0.20") 3 mm (0.12") 20 mm (0.79")DL

Paper Feed Direction

Printable area

Figure 1-5. Printable Area for Envelopes

PRODUCT DESCRIPTION Specifications 16

Page 17

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.2.1.6 Ink Cartridge Specification

 Type/color: EPSON-brand special ink cartridges

Table 1-13. Ink Cartridge

Color Size Europe Asia EAI

Black

Cyan

Magenta

Yellow

 Print Capacity

 Black Ink Cartridge: TBD pages/A4

 Color Ink Cartridge

• S size: TBD pages/A4 (360x720 dpi, 5% duty for each color)

• SS size: TBD pages/A4 (360x720 dpi, 5% duty for each color)

 Shelf life: After packing is opened, it is assumed 6 months, and

 Storage Temperature

Situation Storage Temperature Limit

When stored in individual boxes -30 oC to 40 oC

When installed in main unit -20 oC to 40 oC

S size --- T0621 T0601

SS size T0611 T0631 ---

S size --- --- T0602

SS size T0612 T0632 ---

S size --- --- T0603

SS size T0613 T0633 ---

S size --- --- T0604

SS size T0614 T0634 ---

(ISO/IEC10561 Letter Pattern at 360x720 dpi) TBD pages/A4 (360x720 dpi, 5% duty)

assumes 2 years including this.

Table 1-14. Storage Temperature

1 month max. at 40 oC

 Dimension: 12.7 mm (W) x 73.46 mm (D) x 55.25 mm (H)

Pending

Figure 1-6. Ink Cartridge

C A U T I O N

 The ink cartridge cannot be refilled.  The ink cartridge that passes the expiration date should not be

used.

 The ink in the ink cartridge freezes when leaving it in the

environment of -16 °C or under. It takes three hours that the frozen ink becomes usable when moving it from the environment of -20 °C to the environment of 25 °C.

PRODUCT DESCRIPTION Specifications 17

Page 18

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.2.2 Scanner Specifications

This section covers specifications of the scanner.

1.2.2.1 Basic Specifications

 Product type: Flatbed color image scanner

 Scanning method: Scanning of fixed document with mobile scan head

 Sensor: CIS

 Maximum scan area: 8.5" x 11.7" (216 mm x 297 mm)

 Document sizes: A4 or US letter

 Max. effective pixels: 5,100 x 14,040 pixels (600 dpi)

 Resolution

 Main scan: 600 dpi

 Sub scan: 1200 dpi with Micro Step

 Scanning resolution: 50 to 4800 dpi (selectable in 1-dpi steps), 7200 dpi,

9600 dpi

 Gradations (pixel depth): Each color pixel has 16-bit input and either 1-bit or 8-

bit output.

 Scanning speed: 600 dpi

 Color: Approx. 15 msec/line

1.2.2.3 Image Scanning Area

Table 1-15. Image Scanning Area

(readable width)

216 mm (8.5") 1.5 mm ± 1 mm 297 mm (11.7") 1.5 mm ± 1 mm

Original's top left alignment position

OLM

(out-of-range left margin)

First pixel

Scan direction

(readable length)

(out-of-range top margin)

RLOTM

OTM

Original (face down)

Scan bed

Scan area

 Monochrome: Approx. 5 msec/line

 Light source: RGB Three Color LED

Figure 1-7. Image Scanning Area

1.2.2.2 Detailed Specifications

 Control commands: ESC/I D7

 Gamma correction: Two user-defined levels

PRODUCT DESCRIPTION Specifications 18

Page 19

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.2.3 Common

1.2.3.1 Electric Specification

 Primary power input

Table 1-16. Primary Power Input

100-120 V model 220-240 V model

Rated power supply voltage (ACV)

Input voltage range (ACV) 90 ~ 132 198 ~ 264

Rated current (A) 0.4 A (max. 0.7 A) 0.2 A (max. 0.3A)

Rated frequency (Hz) 50 ~ 60

Input frequency range (Hz) 49.5 ~ 60.5

Power consumption (W)

Note 1: This product complies with the “Energy Star” standards.

2: If the printer is not operated at all for at least five minutes, the standby function reduces

the current to the motor to conserve power.

3: If the scanner is not operated at all for at least five minutes, the standby function

reduces the current to the motor to conserve power.

100 ~ 120 220 ~ 240

Approx. 10 W

(Standalone copying, ISO10561 Letter Patter,

Plain Paper - Text)

Approx. 3.0 W (Low-power Mode)

Approx. 3.0 W (Sleep Mode)

Approx. 0.2 W

(Power Off Mode)

Approx. 0.3 W

(Power Off Mode)

1.2.3.2 Environmental Performance

Table 1-17. Environmental Performance

Condition Temperature Humidity *

50 40 30 20

90 80

20 ~ 80% *

Temperature (°C)

Operating 10 ~ 35°C *

Not operating *

Note *1 : After unpacking (storage)

*2: No condensation

*3: Under the following conditions

-20 ~ 40°C 5 ~ 85%

Humidity (%)

Figure 1-8. Temperature/Humidity Range

Impact Vibration

1G,

1 x 10-3 seconds

2G,

2 x 10-3 seconds

0.15G

0.50G

 Insulation resistance

10MΩ minimum (tested between AC line and chassis, test voltage: DC500V)

1.2.3.3 Durability

 Dielectric strength

 AC1000 Vrms for one minute or AC1200 Vrms for one second

(100-120V version)

 AC1500 Vrms for one minute (220-240V version)

PRODUCT DESCRIPTION Specifications 19

 Total print life: 10,000 pages (black only, A4), or five years

(whichever comes first)

 Print Head Life: Seven billion shots (per nozzle) or five years

(whichever comes first)

 Scanner head: MCBF (22,000 cycles)

Page 20

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.2.3.4 Acoustic Noise

 Noise level

Approx. 45 dB (according to ISO7779 when for copying)

1.2.3.5 Safety Standards: EMC

Table 1-18. Safety Standards: EMC

100-120 V version 220-240 V version

Safety standards

EMI

UL60950

CSA C22.2 No.60950

FCC part15 subpart B class B EN 55022(CISPR Pub.22) class B

CAN/CSA-CEI/IEC CISPR 22 Class B AS/NZS CISPR22 class B

EN 60950

1.2.3.6 CE Marking

 220-240 V version

 Low Voltage Directive 73/23/EEC: EN60950

 EMC Directive 89/336/EEC: EN55022 Class B

EN61000-3-2 EN61000-3-3 EN55024

PRODUCT DESCRIPTION Specifications 20

Page 21

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.3 Interface

The EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 provides the following interface.

1.3.1 USB Interface

 Standards

 “Universal Serial Bus Specifications Revision 2.0”

 “Universal Serial Bus Device Class Definition for Printing Devices Version

1.1” (printer unit)

 Transfer rate: 12 Mbps (Full Speed Device)

 Data format: NRZI

 Compatible connector: USB Series B

 Recommended cable length: 2 [m] or less

 Device ID

Table 1-19. Device ID

Model Name Device ID

[00H][5AH] MFG:EPSON;

CX3700

CX3800 CX3805 CX3810

DX3800/DX3850

CMD:ESCPL2,BDC,D4,ESCPR1; MDL:Stylus[SP] CX3700; CLS:PRINTER; DES:EPSON[SP]Stylus[SP] CX3700;

[00H][5AH] MFG:EPSON; CMD:ESCPL2,BDC,D4,ESCPR1; MDL:Stylus[SP] CX3800; CLS:PRINTER; DES:EPSON[SP]Stylus[SP] CX3800;

[00H][5AH] MFG:EPSON; CMD:ESCPL2,BDC,D4,ESCPR1; MDL:Stylus[SP] DX3800; CLS:PRINTER; DES:EPSON[SP]Stylus[SP] DX3800;

 Connector signal layout

Table 1-20. Connector Pin Assignment and Signals

Pin No. Signal name I/O Function Description

1 VCC - Cable power. Max. power consumption is 2 mA.

2 -Data Bi-D Data

3 +Data Bi-D Data, pull up to +3.3 V via 1.5 K ohm resistor.

4 Ground - Cable ground

Pin #2

Pin #3

Pin #1

Pin #4

Figure 1-9. USB pin Assignment

 Product ID

 0x0818

 Endpoint attribute

Table 1-21. Endpoint Attribute

I/F No. Endpoint Address Endpoint Type Linked Interface

0x00

0x01

0x01 Bulk In

0x02 Bulk Out

0x03 Bulk In

0x04 Bulk Out

Scanner

Printer

PRODUCT DESCRIPTION Interface 21

Page 22

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.4 Stand-alone Copy

1.4.1 Basic Specifications

1.4.1.1 Supported Paper Sizes, Types and Qualities

Table 1-22. Supported Paper Sizes, Types and Qualities (for EAI)

Paper type

Paper name

Plain Paper

Bright White Paper

Premium Glossy Photo Paper

Glossy Photo Paper

Note *1: The quality of draft copy is not affected by “Paper type” selection.

Panel

indication

Plain Paper Plain Paper Letter LetterRecycled Paper

Photo Paper Photo Paper 4" x 6" 4" x 6"Premium Semigloss Photo Paper

Quality *

Table 1-23. Supported Paper Sizes, Types and Qualities (for EUR/ASIA)

Paper type

Paper name

Plain Paper

Bright White Paper

Premium Glossy Photo Paper

Premium Semigloss Photo Paper

Panel

indication

Plain Paper Plain Paper A4 A4rRecycled Paper

Photo Paper Photo Paper 10 x 15

Quality

Paper size

Panel

indication

Panel

indication

10 x 15

1.4.1.2 Zoom Function

The zoom function provides enlarged or reduced copies of originals. The either of the following can be selected from the operation panel.

 Actual (The state which “Fit to page” is not selected. It is the power-on default.)

The zoom factor is set to 100%.

 Fit to page

This function detects the image size of the original and automatically sets the zoom factor of the copy according to the copy paper's printable area.

1.4.1.3 Maximum Copy Size

 216 mm x 297 mm

1.4.1.4 Copy Layout

The following copy layout is provided according to “Paper type”, “Paper size” and zoom selections.

 Standard copy

Provided for ordinary use with 3mm copy margin from every side.

 BorderFree copy

Border-free printing of copies occurs when the print area is set as larger than the copy paper's size. In such cases, the outer edges of the original image may be omitted in the printed copy.

NOTE: Only “Standard Copy” can be used in draft copy mode.

Note *1: The quality of draft copy is not affected by “Paper type” selection.

*2: 10 x 15: The panel indicator only. The printer chalks 10 x15 format up to

4 x 6 format.

PRODUCT DESCRIPTION Stand-alone Copy 22

Page 23

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 1-24. Copy Layout (for EAI)

Zoom Paper Type Paper Size B&W / Color Layout

Actual*

Fit to page*

Photo Paper 4" x 6" B&W, Color Standard

Plain Paper Letter B&W, Color Standard

Photo Paper 4" x 6" B&W, Color Border Free

Note *1 : Actual is the state that “Fit to page” is not selected.

*2: “Fit to page” automatically sets the enlarge/reduce scale so that the entire image fits

into the printable area or the border free area when border free layout is selected. When the original image is smaller than general card size (approx. 54mm x 86mm), the print margins will be different from the one that is defined by each layout. The image placement uses the upper left corner as the origin and any margins that occur during the fitting process occur along the bottom and/or right edge.

Table 1-25. Copy Layout (for EUR/ASIA)

Zoom Paper Type Paper Size B&W / Color Layout

Actual*1

Fit to page*

Note *1 : Actual is the state that “Fit to page” is not selected.

*2: “Fit to page” automatically sets the enlarge/reduce scale so that the entire image fits

*3: 10 x 15 is the media size of 4 x 6 used in Euro/Asia, so their physical size is the

same.

Plain paper A4 B&W, Color Standard

Photo Paper 10 x 15*

Plain Paper A4 B&W, Color Standard

Photo Paper 10 x 15*

B&W, Color Standard

B&W, Color Border Free

1.4.2 Copy Speed

 Plain Paper/e-memo Pattern (A4)

Black: 5 sec (Fastest mode 360 x 120dpi), 14 sec (Default 360 x 360dpi)

Color: 14 sec (Fastest mode 360 x 120dpi), 72 sec (Default 360 x 360dpi)

NOTE: CPM is not defined as this unit has single copy function only.

1.4.3 Configuration for Copying

Table 1-26. Configuration for Copying

Copy Mode setting Scan and Print configuration

Enlarge / Reduce*

(%)

100

(Default)

100

(Default)

100

(Default)

100

(Default)

100

(Default)

100

(Default)

Paper type

Plain Paper

Photo Paper

Draft*3 (Plain

paper only)

B&W /

Color

B&W

Color

B&W

Color

B&W

Color

Note *1 : “Default” is the state in which “Fit to page” is not selected. When “Fit to page” is

selected, scan resolution will be optimized according to enlarge/reduce scale.

*2: Composite black will be used in both B&W and color mode.

*3: With “Draft”, both real black and composite black will be used for black printing.

resolution

(H x V dpi)

360 x 360 VSD1 On On CB2

360 x 360 VSD1 On On CC2

1440 x 720 VSD3 On On CB3

1440 x 720 VSD3 On On CC3

360 x 120 Eco Off On CB1

360 x 120 Eco Off On CC1

Dot size MW

Speed

High

LUT

PRODUCT DESCRIPTION Stand-alone Copy 23

Page 24

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.4.4 Relation between Original and Copy

1.4.4.1 Standard Copy

The following table shows the relative positioning of the original and copy.

Table 1-27. Original (scanner)

(readable width)

216 mm (8.5") 3 mm 297 mm (11.7") 3 mm

RM LM TM BM

3 mm (0.12") 3 mm (0.12") 3 mm (0.12") 3 mm (0.12")

Note : Refer to “1.2.1.4 Paper Support ” (p.11) for paper width (PW) and paper length (PL).

(out-of-range left margin)

OLM

Table 1-28. Copy (printer)

(readable length)

OTM

(out-of-range top margin)

OLM

TopPW

TopRW

*2*1

Right side of copy

Print direction

Scan direction

BMTM

Copy

Print area

Copy paper

Original (face down)

Scan area

Scan bed

Right side of original

OTM RL

Note *1 : This indicates the top left corner of the original. Normally, this corner is aligned

with the scan bed's top right corner as the reference point.

*2: This indicates the scan start position at the top left of the original, which

corresponds to the print start position at the top left of the copy. The bottom right corner position of the copy is within the print area but varies according to the enlarge/reduce setting.

Figure 1-10. Standard Copy

PRODUCT DESCRIPTION Stand-alone Copy 24

Page 25

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.4.4.2 BorderFree Copy

The following table shows the relative positioning of the original and copy.

Table 1-29. Original (scanner)

(readable width)

216 mm (8.5") 1.5 mm ± 1 mm 297 mm (11.7") 1.5 mm ± 1 mm

RO LO TO BO

2.5 mm 2.5 mm 3.0 mm 5.0 mm

Note : Refer to “1.2.1.4 Paper Support ” (p.11) for paper width (PW) and paper length (PL).

(out-of-range left margin)

OLM

Table 1-30. Copy (printer)

(readable length)

OTM

(out-of-range top margin)

OLM

Right side of copy

TopPW

Print direction

*2*1

Scan direction

TopRW

Copy

Print area

Copy paper

Original (face down)

Scan area

Scan bed

Right side of original

OTM RL

Note *1 : This indicates the top left corner of the original. Normally, this corner is aligned

with the scan bed's top right corner as the reference point.

*2: This indicates the scan start position at the top left of the original, which

corresponds to the print start position at the top left of the copy. The bottom right corner of the print area varies according to the scale setting in the print area.

Figure 1-11. BorderFree Copy

PRODUCT DESCRIPTION Stand-alone Copy 25

Page 26

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.4.4.3 Small Margins Copy

The following table shows the relative positioning of the original and copy.

Table 1-31. Original (scanner)

(readable width)

216 mm (8.5") 1.5 mm ± 1 mm 297 mm (11.7") 1.5 mm ± 1 mm

RM LM TM BM

1.5 mm 1.5 mm 1.5 mm 1.5 mm

Note : Refer to “1.2.1.4 Paper Support ” (p.11) for paper width (PW) and paper length (PL).

(out-of-range left margin)

OLM

Table 1-32. Copy (printer)

(readable length)

OTM

(out-of-range top margin)

OLM

TopPW

TopRW

*2*1

Right side of copy

Print direction

Scan direction

BMTM

Copy

Print area

Copy paper

Original (face down)

Scan area

Scan bed

Right side of original

OTM RL

Note *1 : This indicates the top left corner of the original. Normally, this corner is aligned

with the scan bed's top right corner as the reference point.

*2: This indicates the scan start position at the top left of the original, which

corresponds to the print start position at the top left of the copy. The bottom right corner position of the copy is within the print area but varies according to the enlarge/reduce setting.

Figure 1-12. Small Margins Copy

PRODUCT DESCRIPTION Stand-alone Copy 26

Page 27

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.5 Control Panel

1.5.1 Buttons

The control panel contains following seven buttons, which are used to set and execute various operations. All of them are non-lock type buttons.

Table 1-33. Buttons

Button Function

Power Button Execute turning on/off this unit.

Ink Button Execute exchanging ink cartridges or head cleaning.

Paper Size Button Select paper size.

Fit to Page Button Alternate zoom of “Fit to page” and default (actual; 100%).

B&W Start Button *

Color Start Button Start card print or color copy.

Stop Button Stop job of copying or printing or sometimes work as shift button.

Note *1: B&W means “Black and White”.

Refer to “1.5.3.1 Stand-alone Copy” (p.29) for details about each button.

Start monochrome copy.

1.5.2 Indicators

The control panel contains following six LEDs, which are used to indicate various status.

Table 1-34. Indicators

LED Function

Power LED [Green] *1Light at stand-by. Blink while some operation is proceeding.

Error LED [Red] Light or blink while some error or warning is occurring.

Ink LED [Red]

Paper Size LED 1,2 Light one of them showing which paper size below is selected.

1st [Green] A4 or Letter *

2nd [Green] 10x15 or 4"x6" *

Fit to Page LED [Green]

Note *1 : All LEDs except for Power LED will be turned off while printing or scanning by PC.

*2: Depending on its market. Letter and 4"x6" are for North and South America, and A4

and 10x15 are for other areas.

Light when some ink is out. Blink when some ink is near empty or in the ink cartridge exchanging procedure.

Light when “Fit to Page” function is effective in copy mode.

PRODUCT DESCRIPTION Control Panel 27

Page 28

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Power Button

Ink Button

Paper Size Button

Fit to Page Button

B&W Start

Button

Color Start

Button

Stop Button

Power LED

Error LED

Ink LED

Paper Size LED 1,2

Fit to Page LED

Power Button

Ink Button

Paper Size Button

Fit to Page Button

B&W Start

Button

Color Start

Button

Stop Button

Power LED

Error LED

Ink LED

Paper Size LED 1,2

Fit to Page LED

Figure 1-13. Control Panel (For EAI)

Figure 1-14. Control Panel (For Europe and Asia)

PRODUCT DESCRIPTION Control Panel 28

Page 29

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.5.3 Operations

1.5.3.1 Stand-alone Copy

The functions of this unit caused by each button in stand-alone copy mode are described in the following table.

Table 1-35. Operations

Button

Power Button • Turn on or off this unit.

• Start or advance ink cartridge (I/C) exchanging procedure.

 Case

 [All inks are enough.] Move carriage (CR) to I/C exchange position.

Ink Button

Ink Button (Holding over 3 sec.)

Paper Size Button

Fit to Page Button

B&W Start Button

Color Start Button

Stop Button

B&W Start Button + Stop Button

Color Start Button + Stop Button

 [Ink low, Ink out, Without I/C error] Move CR to each color's ink check position if that color's I/C is ink low or ink out or without I/C. CR moves in the order of Cyan,

 [CR is in some color's ink check position.] Move CR to next color's ink check position or I/C exchange position.  [CR is in I/C exchange position.] Move CR to standby position.

• Invalid while printing, scanning, cleaning head, stopping printing or copying, exchanging I/C, or in error status except for ink out error, paper out error, index sheet error, PG error.

• Start cleaning head procedure.

• Invalid while printing, scanning, cleaning head, stopping printing or copying, exchanging I/C, or in error status except for paper out error, index sheet error, PG error.

• Alternate paper size of “Letter (or A4)” and “4"x6" (or 10x15)”.

• Invalid while printing, scanning, cleaning head, stopping printing or copying, exchanging I/C, or in error status.

• Alternate “Fit to Page” status and turn on or off the “Fit to Page” LED.

• Invalid while printing, scanning, cleaning head, stopping printing or copying, exchanging I/C, or in error status.

• Start monochrome copy.

• Invalid while printing, scanning, cleaning head, stopping printing or copying, exchanging I/C, or in ink out error.

• Load paper in paper out error or double feed error and eject paper in paper jam error.

• Start color copy.

• Invalid while printing, scanning, cleaning head, stopping printing or copying, exchanging I/C, or in ink out error.

• Load paper in paper out error or double feed error and eject paper in paper jam error.

• Stop job of copying or printing and reset the number of copies to the beginning.

• Eject paper when paper exists or may exist in the paper path.

• Invalid while PC scanning, cleaning head and exchanging I/C.

• Clear some of error status.

• Start draft monochrome copy when “Plain Paper” and “Letter (or A4)” are selected.

• Invalid while printing, scanning, cleaning head, stopping printing or copying, exchanging I/C, or in ink out error, or without “Letter” or “A4” is selected.

• Start draft color copy when “Plain Paper” and “Letter (or A4)” are selected.

• Invalid while printing, scanning, cleaning head, stopping printing or copying, exchanging I/C, or in ink out error, or without “Letter” or “A4” is selected.

Magenta, Yellow, Black.

Function

Stand-alone Copy

PRODUCT DESCRIPTION Control Panel 29

Page 30

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.5.3.2 Low Power Panel Mode

Without any panel operation for 15 minutes while the printer and scanner unit are in standby status, this unit moves into the low power panel mode in which power consumption for the panel decreases. This unit recovers from that mode by pushing any button but Power Button or printing/ scanning by the computer. This unit is turned off by pushing Power Button in that mode.

Table 1-36. Low Power Panel Mode

Action Function

Transition to low power mode

Recovery from low power mode

• Turn off all LEDs except for Power LED.

• Recall the panel status as that before moving to low power panel mode.

1.5.3.3 Nozzle Check Pattern Print

Nozzle check pattern can be printed only with this unit. Left ink quantity of each color is also printed by the unit of 10%. To activate this function, turn on this unit while depressing Ink Button. After printing the pattern, this unit moves to ordinary standby status. The example of nozzle check pattern is explained below.

360dpi

VSD1

8 dots

(1/120inch)

0.212mm

<Cyan>

Figure 1-15. Nozzle check pattern

PRODUCT DESCRIPTION Control Panel 30

Page 31

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.5.4 Printer Condition and Panel Status

Note : “---”: No change

Blink: 0.5sec. On + 0.5sec. Off repetition Blink 2: 0.2sec. On + 0.2sec. Off + 0.2sec. On + 0.4sec. Off repetition Blink 3: Blink on and off along with access to a memory card Reverse blink: 0.5sec. Off + 0.5sec. On repetition (opposite of “Blink”) Fast blink: 0.2sec. On + 0.2sec. Off repetition Slow blink: 2.0sec. On + 2.0sec. Off repetition

Note *1: When the setting is “On”.

*2: After finishing copying, the counter returns to the preset number of copies.

Table 1-37. Printer Condition and Panel Status

Indicators

Printer Status

Power LED Error LED Ink LED

Power on (Normal ready mode)

Copying mode — — — Selected size is On

Ink low — — Blink — — — 16

Power on (Data Processing)

Stopping printing and cancelling the print job Blink — — — — — 14

The scanner is operating by a computer Blink — — Off Off Off

Printing by a computer Blink — — Off Off Off

Copying Blink — — Selected type is On

Double feed — On Off — — —

Paper out — On Off — — —

Ink Sequence Processing Blink — — — — — 10

Ink Cartridge Change Mode Blink 2 Off Blink 2 — — — 9

Ink out/No Ink cartridge/ Read error/Write error

On — — — — — 18

Blink — — — — — 15

— Off On — — — 8

Paper Size LED

1 2

Fit to Page

LED

On (if the

setting is on)

On (if the

setting is on)

Priority

PRODUCT DESCRIPTION Control Panel 31

Page 32

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 1-37. Printer Condition and Panel Status

Indicators

Printer Status

Power LED Error LED Ink LED

Paper jam — Blink Off — — — 7

Reset request/Stop request/Job cancel request (1 second)

Power on (Initializing operation)

Maintenance request (Liquid waste overflow)

Fatal error (Mechanism) Blink Blink Blink Blink Blink Blink 3

Fatal error (System) Fast blink Fast blink Fast blink Fast blink Fast blink Fast blink 2

Power off (Processing termination)

On (1 sec.) On (1 sec.) On (1 sec.)

Blink — — — — — 5

Blink On On Blink Blink Blink 4

Fast blink Off Off Off Off Off 1

Paper Size LED

1 2

(1 sec.)

Fit to Page

LED

On (1 sec.) 6

Priority

Note"*":Returns to the preset number when the copying is finished.

PRODUCT DESCRIPTION Control Panel 32

Page 33

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.5.4.1 Error Status

 Mechanical fatal error

This error occurs when one of the followings happens.

• The carriage could not recognize the home position.

• The carriage is put an unusual external force when the power is on.

• The movement of the carriage is obstructed during printing.

 Paper jam error

The printer fails to detect either the leading edge or back-end of the paper after performing paper feeding for specified number of times.

 Paper out error

This error occurs when one of the followings happens.

• There is no paper on the tray.

• Paper has stopped before the PE sensor, or paper could not be fed correctly.

• Papers are set without setting their edges against the right edge guide.

 Ink end

There is no ink remaining in the installed Bk, Y, M, or C cartridge(s), or ink cartridge(s) is not installed.

 Liquid waste overflow

Amount of ink discharged while cleaning or flushing has exceeded the given level.

 Double feed error

This error only occurs when performing duplex printing. There are two following cases:

1.5.5 Memory Functions

1.5.5.1 Parameters that are retained when power is turned off

The following parameters are retained when the unit's power is off. They are listed along with the corresponding memory functions in the table below.

 Copy mode is selected when this unit is turned on apart from the mode when it was

turned off before.

 Paper Type and Paper Size are retained for each mode as default.

 Zoom is retained for copy mode as default.

Table 1-38.

Mode Parameter retained in memory Factory setting

Paper Type Plain Paper

Copy

Zoom (The status of Fit to Page) 100% (OFF)

Paper Size Letter or A4

• Blank paper is ejected when loading papers.

 The length of the paper is determined to be long when ejecting the paper.

PRODUCT DESCRIPTION Control Panel 33

Page 34

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

1.5.6 Printer Initialization (T.B.D)

There are four kinds of initialization method, and the following explains each initialization.

1. Power-on initialization This printer is initialized when turning the printer power on, or printer recognized the cold-reset command (remote RS command). When printer is initialized, the following actions are performed. (a) Initializes printer mechanism (b) Clears input data buffer (c) Clears print buffer (d) Sets default values

2. Operator initialization This printer is initialized when turning the printer power on again within 10 seconds from last power off, or printer recognized the -INIT signal (negative pulse) of parallel interface. When printer is initialized, the following actions are performed. (a) Cap the printer head (b) Eject a paper (c) Clears input data buffer (d) Clears print buffer (e) Sets default values

3. Software initialization The ESC@ command also initialize the printer. When printer is initialized, the following actions are performed. (a) Clears print buffer (b) Sets default values

4. Power-on initialization except I/F The printer recognized the IEEE 1284.4 “rs” command. When printer is initialized, the following action is performed. (a) Initializes printer mechanism (b) Clears input data buffer (c) Clears print buffer (d) Sets default values except I/F

PRODUCT DESCRIPTION Control Panel 34

Page 35

OPERATING PRINCIPLES

CHAPTER

Page 36

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.1 Overview

This section describes the operating principles of the Printer Mechanism, Scanner Mechanism and Electrical Circuit Boards.

 Main Board

 C612 Main Board

 Power Supply Board

 C610 PSB/PSE Board

 Panel Board

 C612 PNL Board

2.2 Printer Mechanism

2.2.1 Printer Mechanism

This printer consists of the Print Head, Carriage Mechanism, Paper Loading Mechanism, Paper Feeding Mechanism, Ink System. Like the previous printers, the Stylus CX3700/CX3800/CX3805/CX3810/DX3800/ DX3850 is equipped with two DC motors; one for the Paper Loading/Feeding Mechanism and the Pump Mechanism with the CR Lock Mechanism, and one for the CR Mechanism. The ASF Unit for the Paper Loading Mechanism uses rear entry front eject system. The Paper Feeding Mechanism uses the LD Roller and Retard Roller to feed paper to the Printer Mechanism in the same way as previous printers.

PF Roller

Star Wheel

Carriage Unit

EJ Roller

Change lever

PF ScalePF Encoder Sensor

CR Motor

PF Motor

Timing Belt

CR Encoder Sensor

LD Roller

Retard Roller

Compression Spring

PE Sensor

Clutch mechanism

Cap Unit

Pump Unit

Figure 2-1. Printer Mechanism block diagram

OPERATING PRINCIPLES Overview 36

Page 37

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.2.2 Print Head

The Print Head is the same D2-CHIPS type as the previous SPC, and makes it possible to perform economy dot printing and variable dot printing. The Print Head nozzle configuration is as follows.

 Nozzle layout

 Black : 90 nozzles x 1 row

 Color : 29 nozzles x 3 row/color (Cyan, Magenta, Yellow)

The nozzle layout when viewed from the back surface of the Print Head is shown below.

2.822mm(40/360inch)

D#29

A#90

D#28

D#2 D#1

C#29

C#2 C#1

B#29

B#2 B#1

A#89

A#63 A#62 A#61 A#60

A#33 A#32 A#31 A#30

A#3 A#2 A#1

Black

0.2117mm

(1/120inch)

Cyan

Magenta

Paper Feed Direction

Yellow

The basic operating principles of the Print Head, which plays a major role in printing, are the same as the previous printer (Stylus Photo R300/R310); on-demand method which uses PZT (Piezo Electric Element). In order to uniform the ejected ink amount, the Print Head has its own Head ID (13-digits code for this Print Head for Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850) which adjusts PZT voltage drive features. So, you are required to store the Head ID pasted on the Print Head into the EEPROM by using the Adjustment Program when replacing the Print Head, the Main Board Unit, the Printer Mechanism with new one. (Note: there are no resistor arrays to determine the Head ID on the Main Board.) And then, based on the stored Head ID into the EEPROM, the Main Board generates appropriate PZT drive voltage.

Following explains the basic components for the Print Head.

 PZT

PZT is an abbreviation of Piezo Electric Element. Based on the drive waveform generated on the Main Board, the PZT selected by the nozzle selector IC on the Print Head pushes the top of the ink cavity, which has ink stored, to eject the ink from each nozzle on the nozzle plate.

 Electric poles for CSIC

This Electric Poles connects the CSIC chip mounted on the Ink Cartridge. By using this poles, current ink consumption amount data is red out from the CSIC chip. And, the latest ink consumption amount data is written into the CSIC chip.

 Nozzle Plate

The plate with nozzle holes on the Print Head surface is called Nozzle Plate.

 Filter

When the Ink Cartridge is installed, if any dirt or dust around the cartridge needle is absorbed into the Print Head, there is a great possibility of causing nozzle clog and disturbance of ink flow, and alignment failure and dot missing finally. To prevent this problem, a filter is set under the cartridge needle.

Carriage Moving Direction

Figure 2-2. Nozzle layout

The Print Head has the Electric Poles (CSIC Connectors) to store the ink consumption amount data into the CSIC chip mounted on the Ink Cartridge. By storing the ink consumption amount data, this printer can detect the ink consumption status, such as Ink Low/Out condition.

OPERATING PRINCIPLES Printer Mechanism 37

Page 38

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

 Ink Cavity

The ink absorbed from the Ink Cartridge goes through the filter and then is stored temporarily in this tank called “ink cavity” until PZT is driven.

Electric poles for CSIC

Needle

Filter

Nozzle selector board

CSIC Memory chip

*Head ID for the Print Head is

stored to the EEPROM.

Ink cartridge

PZT

Nozzle plate

Cavity

Figure 2-3. Printhead sectional drawing

2.2.2.1 Printing Process

This section explains the process which the Printheads of On-Demand inkjet printers eject ink from each nozzle.

1. Normal state: When the printing signal is not output from the Main Board (C612 Main), or the PZT drive voltage is not applied, the PZT does not change the shape. Therefore, the PZT does not push the ink cavity. The ink pressure inside the ink cavity is kept normal. (refer to Figure 2-4 (p.38): Normal state)

2. Ejecting state: When the print signal is output from Main Board (C612 Main), the nozzle selector IC located on the Print Head latches the data once by 1-byte unit. Based on the drive waveform (common voltage) generated on the Main Board, the PZT selected by the nozzle selector IC pushes the top of the ink cavity. By this operation, the ink stored in the ink cavity is ejected from nozzles. (refer to Figure 2-4 (p.38): Ejecting state)

Ink path PZT Ink cavity

Normal state

Nozzle Nozzle plate

PZT drive voltage

Ejecting state

Figure 2-4. Print Head printing process

2.2.2.2 Printing Method

The dot printing systems of CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 are variable dot printing systems.

 Variable dot printing

This printing mode is developed to improve the print quality on exclusive paper. This mode is basically the same as variable dot printing mode used on other products; micro dot, middle dot and large dot compose this mode. The printing dot size varies according to the print data and this mode enables to output even sharper image on exclusive paper.

OPERATING PRINCIPLES Printer Mechanism 38

Page 39

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.2.3 Carriage Mechanism

The Carriage Mechanism consists of Carriage Unit (including the Print Head, CR Encoder Board and PW Sensor), CR Motor, Timing Belt and CR Scale etc. Following figure shows you each component for the CR Mechanism.

2.2.3.1 Carriage Mechanism

The following DC motor controls the CR Mechanism on this printer.

Table 2-1. Carriage Motor specification

Items Specifications

Type DC motor with brushes

Drive Voltage 42V (DC) ± 5% (voltage applied to driver)

Armature resistance 29.1 Ω ± 10% (per phase at 25 degrees)

Inductance 20.1mH ± 25%

Drive Method PWM, constant-current chopping

Driver IC A6627

Close loop control based on the CR Motor (DC Motor) and CR Encoder has advantages in stabilized print quality.

 Heat generation control

Using low-cost DC motors, this product grasps the variations of the torque constants, coil resistances and power supply voltages of the individual DC motors adequately to carry out heat generation control according to individual differences.

 CR measurement sequence

To set the appropriate drive current value according to the variation of the CR mechanical load, the mechanical load is measured in a CR measurement sequence and saved into the EEPROM in a power-on or I/C change sequence. A fatal error will occur if too much load is applied to the CR drive system.

The above control and sequences correct the drive current value of the CR Motor according to not only the mechanical load but also the variations of the motor and like. In addition, the resultant CR drive current value is used to calculate a heating value, and when the specified heating value is reached, wait time is provided per CR path for printing.

CR Motor

CR Scale CR Encoder SensorPW Sensor

 CR variation measurement sequence

The variations of the torque constant, coil resistance and power supply voltage of the motor are measured in a CR variation measurement sequence when the CR

Carriage Guide ShaftTiming Belt

Figure 2-5. Carriage Mechanism

Carriage Unit

mechanical load is in the initial status and saved into the EEPROM. According to the variations (individual differences) measured in this sequence, the voltage is corrected to make the drive current value constant (without an individual difference).

OPERATING PRINCIPLES Printer Mechanism 39

Page 40

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.2.3.2 Carriage Home Position Detection

1. Current position temporary detection sequence determines if the carriage is in the carriage lock position and releases the carriage if it is locked.

2. The carriage is moved to the left frame hit position and the carriage motor is stopped.

3. The position that is specified steps right from the stopping place is defined as an origin, and from that time, positional information is monitored by the linear encoder.

If the positional information could not be gained during detecting carriage home position due to the following causes, fatal error occurs.

•ObstructioMns on the carriage path or other factors are giving too much pressure

on the MCR motor.

•CR linear encoder failure, CR linear scale defect, etc.

OPERATING PRINCIPLES Printer Mechanism 40

Page 41

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.2.4 Paper Loading/Feeding Mechanism

The following DC motor controls the Paper loading/feeding mechanism on this printer.

Table 2-2. PF Motor specifications

Item Description

Motor type DC motor with brushes

Drive voltage 42V (DC) ± 5% (voltage applied to driver)

Armature resistance 27.5 Ω ± 10% (per phase at 25 degrees)

Inductance 21.4mH ± 25% (1KH 1Vrms)

Driving method PWM, constant-current chopping

Driver IC A6627

Left side view

PF Motor

Spur Gear 30.8

PF Scale

PF Encoder Sensor

Spur Gear 30.8

The drive of the PF motor is transmitted to the LD roller shaft and the PF roller through gears for the Paper loading/feeding mechanism. The Paper loading mechanism plays a role in loading a paper from the ASF unit to the PF roller. And also, the Paper feeding mechanism plays a role in feeding a paper loaded from the ASF unit. The functions of the Paper loading/feeding mechanism varies depending on the rotational direction of the PF motor as the table below.

Table 2-3. ASF unit function & PF Motor rotational direction

Directions * Corresponding functions

Clockwise

• Pick up and feed a paper

• Set the Change Lever on the Clutch mechanism

Counterclockwise • Release the Change Lever from the Clutch mechanism

Note " *" : The PF Motor pinion gear rotation direction = seen from the left side of the printer.

Following shows you the transmission path of the PF Motor drive to the LD Roller, the PF Roller and the EJ Roller. (The numbers in the following figure show you the order of transmission path.)

Left side view

PE Sensor

Spur Gear 13.5 (PF roller)

Combination Gear 27.2, 19.2

Spur Gear 36.8

Paper

Absent

Paper

Present

PF Motor pinion gear

Spur Gear 32.4 (PF Roller)

Spur Gear 36 (EJ Roller)

Combination Gear 21.24

EJ Roller

PF Roller

Spur Gear 27.2

Spur Gear 16 (Change Lever)

PE Sensor

Lever

Low signal

Paper

High signal

Note : The Clutch gear is molded on the backside of the Spur Gear 36.8 such as Combination gear.

Figure 2-6. Paper loading/feeding mechanism

OPERATING PRINCIPLES Printer Mechanism 41

Page 42

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

For your reference, the top or the end of a paper is usually detected with the PE Sensor. In case that the PE Sensor cannot detect the top of a paper in the paper loading sequence, the printer indicates the “Paper Out error”. If the PE Sensor cannot detect the end of a paper in the paper feeding sequence, the printer indicates the “Paper Jam error”. As for the details, refer to Chapter 3 “Troubleshooting”.

2.2.4.1 Paper Loading Mechanism

The Paper loading mechanism consists of the Change Lever in the Pump Unit, the Holder Shaft Unit (including the Clutch mechanism) and the ASF Unit. The Change Lever and the Clutch mechanism play a major role in the Paper loading mechanism as follows.

1. ASF home position detection function The ASF Unit on this printer does not have the ASF Home Position Sensor. Instead of the ASF Home Position Sensor, the Change Lever and the Clutch mechanism is used to detect the ASF home position. When the Change Lever is set on the Clutch mechanism with the counterclockwise rotation of the PF Motor pinion gear, the ASF home position is detected by this lever for the paper loading operation. In this time, the printer cannot load a paper from ASF Unit because the drive of the PF Motor is not transmitted to the LD Roller Shaft.

2. Paper loading function When the Change Lever is released from the Clutch mechanism with the clockwise rotation of the PF Motor pinion gear, the ASF home position detection function is changed over to the paper loading function. Therefore, the printer can load a paper from ASF Unit because the drive of the PF Motor is transmitted to LD Roller Shaft.

During paper loading, paper is transported from the ASF Unit into the printer by the rotation of the 2 cams of the LD Roller.

 Cam (Large) : Hopper release

 Cam (Small) : Paper Back Lever release

When 1 page paper is loaded, the cams mentioned above prepare the Hopper and Paper Back Lever for the next paper loading operation, and the remaining paper is returned to the standby position.

Figure 2-7 (p.43) and Figure 2-8 (p.44) show you the ASF paper loading sequence and

the operation of each mechanism.

OPERATING PRINCIPLES Printer Mechanism 42

Page 43

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

When the PF Motor pinion gear rotates CCW direction (right side view), the Change Lever pushes down the Clutch lever as right figure and the Clutch lock tooth is disengaged from the Clutch Gear. As the result, the LD Roller Shaft dose not rotate at all because the drive of the PF Motor is not transmitted. In this time, the Hopper is also pushed down by the two cams on the LD Roller Shaft, and the Paper Back Lever is set to avoid that papers are slipped down from the paper set position.

This position is the ASF home position.

Hopper & Paper Back Lever condition

Hopper release cam

LD Roller Shaft

LD Roller

Paper Back Lever

Torsion spring 6.45

Gear rotation direction (Right side view)

Spur Gear 13.5 (PF Roller)

Step 1 (ASF Home position) Step 2

Hopper & Paper Back Lever condition

Hopper

Compression Spring 5.58

ASF Frame

Gear rotation direction (Right side view)

Change lever

Clutch lever

Clutch Clutch

gear

Clutch lock tooth

To Front side

Extension Spring

0.143

When a paper is loaded from the ASF Unit, the Change Lever moves to the front side of the printer with the CW rotation (right side view) of the PF Motor pinion gear and releases the Clutch lever. As the result, the Clutch turns back to the engagement position by the tension force of the Extension Spring 0.143. And, the Clutch gear is engaged with the Clutch lock tooth to transmit the drive of the PF Motor as left figure. In this time, the Change Lever is locked instantaneously by the protrusion on the backside of the Carriage Unit to change over from the ASF home position detection function to the paper loading function surely.

PF Motor pinion gear (CCW) → Spur Gear 30.8 (CW) → Spur Gear 32.4 (PF Roller) (CCW) → Spur gear 13.5 (PF Roller) (CCW) → Combination Gear 21.24 (CW) → Spur Gear 27.2 (CCW) → Spur Gear 16 (CW) → Change Lever (CW) → Combination Gear 27.2, 19.2 (CCW) → Spur gear 36.8 (CW) * Above transmission pass = seen from the right side of the printer

PF Motor pinion gear (CW) → Spur Gear 30.8 (CCW) → Spur Gear 32.4 (PF Roller) (CW) → Spur gear 13.5 (PF Roller) (CW) → Combination Gear 21.24 (CCW) → Spur Gear 27.2 (CW) → Spur Gear 16 (CCW) → Change Lever (CCW) → Combination Gear 27.2, 19.2 (CW) → Spur gear 36.8 (CCW) * Above transmission pass = seen from the right side of the printer

Figure 2-7. ASF paper loading sequence (Step 1, 2)

OPERATING PRINCIPLES Printer Mechanism 43

Page 44

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

The PF Motor pinion gear rotates CCW direction (right side view), and the drive of the PF Motor is transmitted to the LD Roller Shaft through the Clutch lock tooth and the Clutch gear. After the LD Roller pushes down the Paper Back Lever into the ASF Frame, the Hopper is released by the tension force of the Compression Spring 5.58. And, a paper is picked up with the frictional force between the LD Roller and the Pad Hopper.

Hopper & Paper Back Lever condition

Hopper release cam

Gear rotation direction (Right side view)

Step 3 Step 4

Hopper & Paper Back Lever condition

Hopper release cam

Compression Spring 5.58

Paper Back Lever

Gear rotation direction (Right side view)

LD Roller Shaft

While the LD Roller rotates CCW direction (right side view) continuously, the top of a paper is loaded to the PF Roller. In this rotation, the Hopper returns to the open

position and the Paper Back Lever is pushed up by the cam of the LD Roller. In this

ASF Frame

time, this lever returns papers to the stand-by position in ASF Unit for next paper loading operation. Then, when the rolling LD Roller & the Clutch come at the above “Step1” position, the Clutch lever is locked with the Change Lever again. In this time, the drive of the PF Motor is interrupted and the drive is transmitted only to the PF Roller side for the paper feeding sequence.

Figure 2-8. ASF paper loading sequence (Step 3, 4)

OPERATING PRINCIPLES Printer Mechanism 44

Page 45

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.2.4.2 Paper Feeding Mechanism

The Paper feeding mechanism consists of PF Motor, PF Roller, EJ Roller, PE Sensor, PF Encoder and PF Scale etc. The Paper feeding mechanism feeds a paper loaded from ASF Unit by using pairs of rollers.

1. One pair is the PF Roller and the Paper Guide Roller which is assembled in the Paper Guide Upper Unit. The drive of the PF Motor is transmitted to the Paper Guide Roller through the PF Roller.

2. Another pair is the EJ Roller and the Star Wheel which is assembled on the EJ Frame Unit. The drive of the PF Motor is transmitted to the Star Wheel through the EJ Roller.

Left side view

Spur Gear 30.8

PF Encoder Sensor

Paper guide roller

Spur Gear 30.8

Star Wheel

Following figure shows you the transmission path for the PF Roller & the Paper Guide Roller and the EJ Roller & the Star Wheel.

The top of a paper is loaded to the PF Roller from the ASF Unit in the paper loading sequence. And then, when the PF Motor pinion gear rotates CW direction (left side view), a paper is fed by the PF Roller & the Paper Guide Roller and the EJ Roller & the Star Wheel in the printing operation & the paper feed sequence.

PF Motor

PF Motor pinion gear

Spur Gear 32.4 (PF Roller)

Transmission path (left side view)

• PF Motor pinion gear (CW) → Spur Gear 30.8 (CCW) → Spur gear 32.4 (PF Roller) (CW)

• PF Motor pinion gear (CW) → Spur Gear 30.8 (CCW) → Spur gear 32.4 (PF Roller) (CW) → Spur Gear 30.8 (CCW) → Spur Gear 36 (EJ Roller) (CW)

PF Scale

Spur Gear 36 (EJ Roller)

PF Roller

EJ Roller

Figure 2-9. Paper feeding mechanism

OPERATING PRINCIPLES Printer Mechanism 45

Page 46

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.2.5 Ink System Mechanism

The Ink System Mechanism consists of Pump mechanism with Carriage lock mechanism and Capping mechanism with Wiper mechanism. Following table lists the function for each mechanism.

Table 2-4. Function for each mechanism

Mechanism Function

Capping mechanism *

Wiper mechanism

Pump mechanism

Carriage lock mechanism

Note : Like the previous printers (Stylus Photo R300/R310), this printer adopts the valveless

cap system. The air valve system used for the previous printer (Stylus COLOR 740) have two functions by the CR position in the capping condition as follows.

This is to cover the surface of the Print Head with the cap in order to prevent the nozzle from increasing viscosity.

This is to remove the foreign material and unnecessary ink on the nozzle plate of the Print Head.

This is to eject the ink from the Ink Cartridge, the ink cavity and the cap to the Waste Ink Pad.

This is to lock the Carriage Unit with the Change Lever while the Carriage Unit is at the home position.

1) Valve closing condition (CL position) By closing the air valve, the ink is forcibly absorbed from the Ink Cartridge or the ink cavity by the Pump Unit and is ejected to the Waste Ink Pad while the Carriage Unit is in the CL position.

2) Valve opening condition (Ink absorption position) By opening the Air valve, the negative pressure is decreased and only the ink inside the Cap is ejected while the Carriage Unit is in the further right side than the CL position. (the ink is not absorbed from the Ink Cartridge or the ink cavity.)

The following shows you the Carriage Unit position for each condition easily.

Printing area CR home position

CL position (valve closing condition)

Ink absorption position (valve opening condition)

But, on the valveless cap system, the above 2) operation is done outside the capping position. The Carriage Unit moves outside the CR home position and the pump absorbs the ink inside the Cap.

OPERATING PRINCIPLES Printer Mechanism 46

Page 47

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.2.5.1 Capping Mechanism

The Capping mechanism covers the Print Head with the Cap to prevent the nozzle from increasing viscosity when the printer is in stand-by state or when the printer is off.

When the Carriage Unit is in the home position, the hook of the Slider Lock Lever is not latched to the dent of the Cap Frame. In this time, the protrusion of the Cap Slider Lever does not reach the rightmost position of the Cap Frame.

Capping position (CR home position)

Step 1

Protrusion

Not latched

 Wiper with the Cap unit

The wiping operation is controlled by the Carriage Unit movement. This operation is usually performed with every CL sequence which is to absorb the ink from the ink cartridge, the ink cavity by the Pump unit. Following figure shows you the mechanism for the wiping operation.

Step 2

The Carriage Unit moves to the Wiper setting position on the rightmost position of the Cap Frame with keeping the Cap covered. In this time, the hook of the Slider Lock Lever is latched to the dent of the Cap Frame.

Latched

Wiper setting position

When the Carriage Unit moves to the left side from the Wiper setting position, the Cap Unit is pulled back by the tension force of the

Spring 0.788

Extension

In this time, the Cap Unit is automatically set to the wiping position because the hook on the Slider Lock Lever is latched to dent of the Cap Frame. And, the wiping operation is performed according to the Carriage Unit movement.

Step 3 Step 4

Protrusion of the Carriage Unit

Wiping position

Latched

Released

Released position (Bottom position)

When the wiping operation is finished and the Carriage unit moves further to the left side, the hook of the Carriage unit hits to the Slider lock lever. In this time, the Slider lock lever is released and the Cap slider returns to the bottom position completely. (The broken line is the position of the Carriage unit & the Slider lock lever just before being released.)

Figure 2-10. Wiper mechanism

OPERATING PRINCIPLES Printer Mechanism 47

Page 48

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.2.5.2 Pump Unit Mechanism

The PF Motor also controls the Pump Unit mechanism (including the Change Lever) as well as the Paper loading/feeding mechanism. The drive of the PF Motor is always transmitted to the Pump Unit. (And also, its drive is transmitted to the LD Roller through the Clutch mechanism & the Change Lever.) On this printer, the Pump Unit mechanism including the Change Lever plays a major role expecting the ink eject operation. And, these operations control depending on the PF Motor rotational direction as the following table below.

Table 2-5. PF Motor rotational direction & Ink system mechanism

Directions * Functions

Clockwise • Pump release

Counterclockwise

Note " * ": The PF Motor rotational direction = seen from the left side of the printer.

Spur Gear 30.8

• Absorbs the ink

• Release the Change Lever from the Clutch mechanism

Left side view

1. Ink eject operation (usual operation) The ink is absorbed from the Ink Cartridge, the ink cavity and is ejected to the Waste Ink Pad from the Cap when the Ink Tube is pressed by a roller in the Pump Unit.

Following figure shows you the overview of the Pump Unit mechanism operation.

Cap Unit

side

Waste Ink

Pad side

Note : The PF Motor rotational direction = seen from the right side of the printer.

Figure 2-11. Pump mechanism

Pump Unit

Spur Gear 27.2 (Pump Unit gear)

Right side view

PF Motor pinion gear

Spur Gear 32.4 (PF Roller)

Cap Unit

Spur Gear 13.5 (PF roller)

Combination Gear 21.24

Transmission Path: PF Motor pinion gear (CW) → Spur Gear 30.8 (CCW) → Spur Gear 32.4 (PF Roller) (CW) → Spur gear 13.5 (PF Roller) (CW) →

Combination Gear 21.24 (CCW) → Spur Gear 27.2 (Pump Unit gear) (CW) (Above transmission pass = seen from the right side of the printer)

Figure 2-12. PF Motor drive transmission path to the Pump Unit

OPERATING PRINCIPLES Printer Mechanism 48

Page 49

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2. Carriage lock operation by the Change Lever Unlike the previous printer (Stylus COLOR 680), this printer does not have the Carriage Lock Lever with the Wiper. Instead of the Carriage Lock Lever, the Change Lever is set to the front side of the printer while the Carriage Unit is in the CR home position. (As for the detailed mechanism for setting the Change Lever, refer to Figure 2-7

(p.43) Step 2)

2.2.6 Ink Sequence

 Initial ink charge

After the printer is purchased and the power is turned on for the first time, the printer must perform the Initial Ink Charge to charge the ink inside the ink cavity. When the Initial Ink Charge is completed properly, the printer releases the flag inside the EEPROM. Initial Ink Charge will take about 107 seconds for Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850. If the power is turned off during the Initial Ink Charge, the CL3 will be performed at next power on timing.

 Manual Cleaning

The Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 provides three types of manual cleaning to clean air bubbles, clogged ink with viscosity or foreign substances. The manual CL can be performed by the Control Panel Operation, the Printer Driver Utility and the Adjustment Program.

 CL1

• Ink absorption Black Ink: 0.348g, Color Ink: 0.348g

• Wiping operation Wipes the nozzle plate by the rubber part on the Cap Unit.

• Flashing operation Prevents color from mixing, and stabilizes ink surface inside the nozzle.

 CL2

• Ink absorption Black Ink: 0.605g, Color Ink: 0.605g

• Wiping operation Wipes the nozzle plate by the rubber part on the Cap Unit.

• Flashing operation Prevents color from mixing, and stabilizes ink surface inside the nozzle.

 CL3

• Ink absorption Black Ink: 1.015g, Color Ink: 1.015g

• Wiping operation Wipes the nozzle plate by the rubber part on the Cap Unit.

• Flashing operation Prevents color from mixing, and stabilizes ink surface inside the nozzle.

OPERATING PRINCIPLES Printer Mechanism 49

Page 50

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Independently of the printing path after the previous CL, perform manual CL from CL1 to CL3 in order if the cumulative printing timer counter is less than 9min. Only when the cumulative printing timer counter is more than 9min, execute only CL1. Additionally, if the I/C is Ink Low or Out condition, any manual cleaning is prohibited and it is displayed on the LED indicators.

 Timer Cleaning

Like the previous printers (Stylus Photo R300/R310), this printer dose not have Lithium battery which is used for the backup power source for Timer IC. So, this printer manages the printer off period or cleaning cycle by using the following method. The Printer Driver sends the timer command to the printer before printing. The timer command is generated based on the PC’s timer and it consists of year, month, date, hour, minute and second. As soon as the printer receives the timer command from the Printer Driver, the printer stores its command in address 06<H> and 07<H> in the EEPROM. Then, it is compared with the latest CL time which is stored in address 04<H> and 05<H> in the EEPROM. And, In case that the timer cleaning period is over the specific period, the printer performs the timer cleaning automatically. In this time, the printer stores the timer command in address 04<H>, 05<H>, 06<H>, 07<H> in the EEPROM. Maximum 2.03g of the ink is consumed in the timer cleaning. (1.015g of black ink and 1.015g of color ink are consumed.)

 Flashing

Two different flushing operations are executed for the following reasons.

 Pre-printing flushing

This is done before a start of printing to eliminate ink viscosity in the Print Head nozzles.

 Periodic flushing

This is done during printing to prevent ink viscosity in the Print Head nozzles from increasing.

OPERATING PRINCIPLES Printer Mechanism 50

Page 51

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.3 Scanner Mechanism

The Scanner Mechanism of Stylus CX3700/CX3800/CX3805/CX3810/DX3800/ DX3850 is constructed of a Scanner Carriage Unit, Scanner Motor, Scanner HP Sensor, etc., in the same way as previous A4 size scanners.

2.3.1 Scanner Carriage Mechanism

2.3.1.1 Scanner Carriage Unit Overview

The Scanner Carriage Unit is constructed of a CIS Board (including linear CCD), Rod Lens Array, LED (light source), etc.

 CIS Board

This takes the light information read from the document by the Rod Lens Array and converts it to digital information using the linear CCD.

 Rod Lens Array

Many rod-shaped lenses are arranged in parallel, and the upright multiple images of each lens is overlapped to form a single continuous image. Compared to a regular lens, this has the special ability to reduce the distances between images. It can project at 1 to 1 size for imaging a linear CCD with a width identical to an A4 size document.

 LED

The unit uses an LED for an exposure light source. Using an LED eliminates the need for an inverter board, and power consumption is reduced.

Scanner Carriage UnitScanner HP Sensor Scanner Carriage Shaft

Scanner Motor Timing Belt

Figure 2-13. Scanner Mechanism

LEDRod Lens Array

CCD

Scanner Carriage Unit

Figure 2-14. Scanning image

CIS Board

OPERATING PRINCIPLES Scanner Mechanism 51

Page 52

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.3.1.2 Scanner Carriage Unit Movement Overview

Scanning image is performed in the main scan direction (=1 line) by the CCD sensor and in the sub-scan direction (=several lines) combined with Scanner Carriage Unit movement. (refer to the figure below) Line type, color CCD sensor can scan 1 line in main scan direction (parallel to the Scanner Carriage Unit) by one time. When scanning next lines after the second line in sub-scan direction, CR driving moves the Scanner Carriage Unit, which has CCD sensor inside, and scan the other lines. The scanned data is sent to the control board. The scanned data for “n” lines and “n-1” line are processed consecutively.

1st line 2nd line 1 pixel

Scanner Carriage Unit

Sub-scan direction by Scanner Carriage Unit movement

Figure 2-15. Scanner Carriage Unit movement

Document

Main-scan direction

Drive of the Scanner Motor is transferred to the Scanner Carriage Unit by the Scanner Timing Belt. The Scanner Carriage Unit slides in the secondary scanning direction. The Scanner Motor uses a stepping motor and drives using open loop control.

When the HP detection flag of the Scanner Carriage Unit disrupts the signal of the Scanner HP Sensor, the Scanner HP Sensor outputs a high signal, and the Scanner Carriage Unit is determined to be in the home position.

Right side

Scanner HP Sensor

Scanner Motor

Left side

Flag

The table below shows the specifications for the stepping motor that controls the Scanner Carriage Mechanism.

Figure 2-16. Scanner Carriage Unit Mechanism

Scanner Carriage Unit

Table 2-6. Scanner Motor specifications

Item Description

Motor type PM type stepping motor

Drive voltage 42V (DC)

Coil resistance 37Ω ±10% (per phase at 25 degrees)

Inductance TBDmH ± TBD%

Driving method PWM

Driver IC A6627

OPERATING PRINCIPLES Scanner Mechanism 52

Page 53

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.4 Electrical Circuit Operating Principles

The electric circuit of the Stylus CX3700/CX3800/CX3805/CX3810/DX3800/ DX3850 consists of the following boards.

 Main Board (CPU-ASIC 2 in 1 + Soldering Flash ROM)

 C612 Main Board

 Power Supply Board

 C610 PSB/PSE Board

NOTE: CPU and ASIC is integrated as one chip (IC8) on the Main Board.

This section provides operating principles of C612 Main Board and C610 PSB/PSE Board. Refer to Figure 2-17 (p.53) for the major connection of the each boards and their roles.

C612 PNL Board

Printer Mechanism

CR Motor

PF Motor

2.4.1 PSB/PSE Board

In the PSB/PSE Board of Stylus CX3700/CX3800/CX3805/CX3810/DX3800/ DX3850, the simulated oscillating stimulation flyback converter circuit method is used, and it supplies +42VDC to the drive line. The application of the output voltage is described below.

Table 2-7. Application Of The DC Voltages

Voltage Application

• Motors (CR Motor, PF Motor, Scanner Motor)

+42VDC

AC voltage input from AC inlet first goes through filter circuit that removes high frequency components and is then converted to DC voltage via the rectifier circuit and the smoothing circuit. DC voltage is then lead to the switching circuit and FET Q1 preforms the switching operation. By the switching operation of the primary circuit, +42VDC is generated and stabilized at the secondary circuit.

• Print Head common voltage

• Print Head nozzle selector 42V drive voltage

Head Driver Board

C612

Main Board

+42VDCPower Off

C610 PSB/PSE

Board

Sensors

Scanner Mechanism

Scanner Motor

CIS Unit

Scanner HP Sensor

Figure 2-17. Electric circuit

OPERATING PRINCIPLES Electrical Circuit Operating Principles 53

Page 54

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.4.2 C612 Main Board

The logic circuit of the C612 Main Board is composed of the follows;

 Logic line (CPU-ASIC 2 in 1, SDRAM, P-ROM and so on)

 Motor control/drive circuit (CR Motor, PF Motor, Scanner Motor)

 Head control/drive circuit

 USB Interface control circuit

 Sensor circuit

 Combination circuit (RTC circuit, Reset circuit, EEPROM circuit)

The printer mechanism is controlled by the above circuits. Following explains the major characteristics of this Main Board.

 Lithium battery is not mounted

Unlike the previous printer (Stylus COLOR 680), the Lithium battery is not mounted on the Main Board.

 Adoption of 3.3V/1.5V drive logic circuit components

The 5V formed by the Combination Motor Driver (IC9) of C612 Main Board is stepped down to 3.3V by the Regulator (IC10), and it is then used as drive voltage for many elements. In addition, when SPC shifts to low power mode, the 3.3V that was stepped down by the Regulator (IC10) is stepped down to 1.5V by the Combination Motor Driver (IC9) and elements that had been driven by 3.3V are driven by 1.5V for suppression of power consumption.

2.4.2.1 Main Elements

Table 2-9 (p.54) shows the function of the each main elements on C571/577 Main

Board.

Table 2-9. Main Elements

IC Location Function

Flash ROM IC5

SDRAM IC6 Bus= 16 bit, 64Mbit DRAM

RTC IC7

CPU-ASIC IC8

Motor Driver IC9

Regulator IC10 Dropping 3.3 V line to 1.5 V

Common Driver IC11

8Mbit

• Firmware storage

•EEPROM Default settings, backup for all parameters

• Reset function

•Timer function

CPU mounted on the MAIN board is driven by clock frequency 48 MHz, 96MHz and controls the printer and scanner.

• CR/PF/Scanner motor drive IC

• Dropping 42V line to 5V

• Dropping 5V line to 3.3V

Head drive control HIC

• Generates head common voltage.

Table 2-8. Drive Components

5VDC 3.3 VDC 3.3/1.5VDC

• RTC (IC7) • Flash ROM (IC5)

• SDRAM (IC6)

• CPU-ASIC (IC8)

• Motor driver (IC9)

• Common driver (IC11)

OPERATING PRINCIPLES Electrical Circuit Operating Principles 54

Page 55

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Flash-ROM

(IC5)

SDRAM

(IC6)

RTC

(IC7)

Data

Address

CPU-ASIC 2 in 1

(IC8)

Motor

Driver

(IC9)

CN8

CN9

CN10

PF Encoder Sensor

CR Motor

PF Motor

Scanner Motor

Scanner HP Sensor

CN11CIS Unit

C612 Panel Board

C610 PS Board

CN3

Converter

(IC12)

CN12

Head

CN13

USB

(CN2)

CN1

Driver (IC11)

Figure 2-18. Block Diagram For The C612 Main Board

Q9, Q10

CN7

PE Sensor

CN5

Print Head

CN6

CR Encoder Sensor

CSIC Board

OPERATING PRINCIPLES Electrical Circuit Operating Principles 55

Page 56

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.4.2.2 Print Head Driver Circuit

The Print Head driver circuit consists of the following two components:

 Head common driver circuit (Common driver IC11 & Wave amplifier

transistor Q9, Q10)

 Nozzle selector IC on the Print Head driver

The common driver (IC11) generates a basic drive waveform according to the output signals from CPU (IC8). The basic drive waveform is amplified by the transistors Q9 and Q10 (the amplified one is called drive waveform.) and then transferred to the nozzle selector IC on the Print Head driver board. Print data is converted to serial data by the CPU and then sent to the nozzle selector IC on the Print Head driver board. Based on the serial data, the nozzle selector IC determines the nozzles to be actuated. The selected nozzles are driven by the drive waveforms amplified by the transistor Q9 and Q10. Refer to Figure 2-19 (p.56) for the Print Head driver circuit block diagram.

 Head common driver circuit

The basic drive waveform is generated in the common driver (IC11) based on the following 13 signal lines output from the CPU (IC8); DATA0-DATA9, LAT, RESET, and PSCNT. By the DATA signal output from the CPU, the original data for the basic drive waveform is written in the memory in the common driver (IC11). The addresses for the written data are determined by DATA0-DATA9 signals. Then, the necessary data is selected from the address and appropriate basic drive waveform is generated. Generated basic drive waveform is transferred to nozzle selector IC on the Print Head driver board through the transistor Q9 and Q10 and applied to the nozzle PZT specified by nozzle selector IC.

 Nozzle selector circuit

Printing data is allocated to the four rows (the number of the head nozzle rows) and converted into serial data by the CPU (IC8). Then the converted data is transferred to the nozzle selector IC through the two signals lines (HS01 to HS02). Data transmission from the CPU to the nozzle selector synchronizes with the LAT signal and SCK clock signal. Based on the transmitted data, appropriate nozzle is selected and the PZTs of the selected nozzle are driven by the drive waveform output from the head common driver.

CPU

(IC8)

HDAC_D0 HDAC_D1 HDAC_D2 HDAC_D3 HDAC_D4 HDAC_D5 HDAC_D6 HDAC_D7 HDAC_D8 HDAC_D9

HDAC_CLK

HDAC_RST

PC3

HSOCLK

HS01 HS02

HLAT

HCH

NCHG

AN1

Head Driver

A15 B15 C15 D15 C13 B13 A13 C14 B14 A14 C16 C17 B1

C12 B8 A7 B9 A8 C11

24 23 22 21 20 19

4 3 2 1

5 6 7

D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 CLK NAST STBY

(IC11)

FEEDBACK

GND_9

GND_10

+42V

+3.3V

NPNB

PNPB

+42V

18 14 13 12

9 10

Q10

Figure 2-19. Print Head Driver Circuit

+3.3V

CN6

CN5

Nozzle

Selector IC

VHV

COM

SCK

SI1_Bk

SI2_Col

COM

LAT

NCHG

XHOT/TMM

Head Drive Pulse

OPERATING PRINCIPLES Electrical Circuit Operating Principles 56

Page 57

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.4.2.3 Motor Driver Circuit

CR/PF Motor drive circuit

The motor driver IC (IC9) on the Main board drives CR/PF Motor. This product uses DC motor and performs constant current PWM drive. Based on the output pulse (signal) from CR Encoder or PF Encoder, the CPU (IC8) sets the appropriate drive current value for each operational action and outputs the value as a special control signal to the Motor Driver (IC9). Then, based on the signal output from the CPU, the Motor Driver outputs the motor drive current to the CR/PF Motor. When no data has been received for 5 minutes, the CPU sets the Motor Driver current value to 0, turning off the Motor Driver, in order to conserve electricity.

Scanner Motor Driver Circuit

The motor driver IC (IC9) on the Main board drives Scanner Motor. This product uses PM type stepping motor and performs constant current bi-polar drive. The Motor Driver IC (IC9) forms the motor drive waveform based on the signal output from the CPU (IC8), controlling the Scanner Motor. When no data has been received for 5 minutes, the CPU sets the Motor Driver current value to 0, turning off the Motor Driver, in order to conserve electricity.

CPU

(IC8)

SCLK1_DCMCU

SDATA1_DCMCU

SLD1_DCMCU

SCLK2_DCMCU

SDATA2_DCMCU

SLD2_DCMCU

ENB1_DCMCU ENB2_DCMCU

CLK4M

RST_DCMCU

A19 B19 A20 D20 C20 D19

B20 C19 E20 E19

+42V

+3.3V+42V+3.3V

Motor Driver

VDD

VBB1

VBB2

VBB3

VBB4

CLK1

DATA1

STB1

CLK2

DATA2

STB2

VRF1

VRF2

VRF3

ENB1

ENB2

OSC

SLEEP

VBBSW

VCP

CP1

CP2

GATEREG

(IC9)

OUT1A

OUT1B

OUT2A

OUT2B

OUT3A

OUT3B

OUT4A

OUT4B

VOUT1

SW1

FB1

VOUT2

SW2

FB2

SENSE1 SENSE2 SENSE3 SENSE4

GND GND GND GND

44 47

42 39

19 22 17 14

29 30 28

33 32 34

45 41 20 16 7 18 27 43

CN8

CN9

CN10

12CR-A

CR-B

12PF-A

PF-B

B-

A-

+3.3V

CR Motor

PF Motor

Scanner Motor

+1.5V_BS

+5V

Figure 2-20. Motor Driver Circuit Block Diagram

OPERATING PRINCIPLES Electrical Circuit Operating Principles 57

Page 58

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.4.2.4 Combination Circuit

This printer differs from previous models by using a combination IC that integrates the reset circuit, EEPROM and RTC.

Reset Circuit

RTC IC (IC7) on the Main Board monitors the three voltage: +3.3V for the logic line, +5V for the logic line and +42V for the drive line. Reset Circuit outputs the reset signal to CPU (IC8) in the following case.

 +3.3V line reset circuit

The 3.3V line is monitored at the VDD port of IC7, and if an abnormal voltage is detected, a reset signal for the CPU is output from the FRST port of IC7.

 +5V line reset circuit

The 5V line is monitored at the VDD2 port of IC7, and if an abnormal voltage is detected, a reset signal for the CPU is output from the RST port of IC7.

 +42V line reset circuit

The 42V line is monitored at the VEX port of IC7, and if an abnormal voltage is detected, a reset signal for the CPU is output from the EXO port of IC7.

EEPROM Control Circuit

When the printer power is turned off, the following information is stored in EEPROM (IC7) which is nonvolatile memory. And, when the printer power is on, CPU (IC8) reads the information from EEPROM.

RTC Circuit

By adoption of the large-capacity capacitor (C9) for timer, the Power-off timer can be backed up for about one week after power-off.

+42V

+5V +3.3V +3.3V +3.3V

RTC

VDD VI5

VDD2 VEX

VSS

(IC7)

CLK

EXO

FRST

RST

5 4 3 2 9 13 11

14 12

A18 B18 A17 B17 E18 C18 D18

CPU (IC8)

TCE TCLK TDO TIMDI NMII MRES RESET

Figure 2-21. RTC Circuit Block Diagram

Information stored in EEPROM is listed below.

 Various ink counter (I/C consumption counter, Waste Ink Pad counter, etc.)

 Mechanical setting value (Head ID, Bi-D Adjustment, USB ID, etc.)

EEPROM is connected to CPU with 4 lines and each line has the following function.

 CE : Chip selection signal

 CLK : Data synchronism clock pulse

 DI : Data writing line (serial data) at power off.

 DO : Data reading line (serial data) at power on.

OPERATING PRINCIPLES Electrical Circuit Operating Principles 58

Page 59

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

2.4.2.5 Sensor Circuit

CPU (IC8) on the Main Board monitors the status of the printer by several sensors. However, unlike the previous product, ASF Unit on this printer does not have ASF Sensor. Instead of ASF Sensor, Change Lever and the Clutch mechanism is used to detect ASF home position. (As for the ASF home position detection, refer to “2.2.4

Paper Loading/Feeding Mechanism” (p.41).)

 PE Sensor

This sensor is mounted at the right side center of the Printer Mechanism, and it detects the presence/absence of paper when the paper passes through the Paper Guide Rear. The PE Sensor is constructed of a transmissive photosensor and the PE Sensor Lever.

 Paper Absent : Because the PE Sensor Lever does not interfere between

the photosensor terminals, a low signal is output to the CPU.

 Paper Present : The PE Sensor Lever interferes between the photosensor

terminals, and a high signal is output to the CPU.

 CR Encoder Sensor

The sensor is composed of a transmissive photosensor mounted to the back of the carriage and a linear scale mounted in the CR scan direction. Minimum resolution of 1/180 inch is provided, and output to the CPU is a high signal for the black slits on the linear scale and a low signal for transparent slits. Control of the CR Motor is based on the output signal. The home position of the Carriage Unit is detected by this sensor.

 Scanner HP Sensor

Mounted in the Scanner Unit, this sensor detects whether the CIS Unit is inside or outside the home position

 Inside HP : A high signal output to the CPU.

 Outside HP : A low signal is output to the CPU.

 PF Encoder Sensor

The sensor is composed of a transmissive photosensors mounted to the loop scale of the PF Roller Unit left side and to the Main Board. Minimum resolution of 1/ 180 inch is provided, and output to the CPU is a high signal for the black slits on the loop scale and a low signal for the transparent slits on the loop scale. Control of the PF Motor is based on the output signal.

 Thermistor (THM)

The thermistor is directly mounted on the Print Head driver board. It monitors the temperature around the Print Head and determines the proper head drive voltage to uniform the weight of the ink fired from the Print Head. This information is fed back to the CPU analog port. When the temperature rises, the head drive circuit lowers the drive voltage: When the temperature lowers, the head drive circuit rises the drive voltage.

OPERATING PRINCIPLES Electrical Circuit Operating Principles 59

Page 60

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

The block diagram for the sensor circuit is shown below.

+3.3V

+3.3V_SN

5 1 6 2 3

CVDD COI CSCK CSDA CRST

CN7

• CR

Encroacher Sensor

• CSIC

CN3

PE Sensor

PEV

GND

+3.3V

3 2 1

+3.3V_SN

CPU

(IC8)

DACDAT

CCLK

CDIO

CXRST

D13 A10 B12 B11 A11

CN4

Scanner HP

Sensor

CN5

THM

PEV

GND

SCN_HP

XHOT/

THM

B10

EA_CR

EB_CR

+3.3V

3 2 1

+3.3V_SN

+3.3V

F20

SCNHP

AN1

EA_PF EB_PF

A16 B16

+3.3V

+3.3V_SN

11 9

PF Encoder

VOA VOB

VCC GND

ENCA ENCB

(P1)

Figure 2-22. Sensor Circuit Diagram

OPERATING PRINCIPLES Electrical Circuit Operating Principles 60

Page 61

TROUBLESHOOTING

CHAPTER

Page 62

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

3.1 Overview

This chapter describes unit-level troubleshooting. Refer to the flowchart in this chapter to identify the defective unit and perform component level repair if necessary. This chapter also explains motor coil resistance, sensor specification and error indication.

START

Unit-level troubleshooting

Unit repair

Assemble & Adjustment

END

Figure 3-1. Troubleshooting flowchart

Table 3-1. Motor, coil resistance

Motor Location Check point Resistance

Scanner motor CN10

Note : Since CR Motor and PF Motor are DC motors, the resistance among the electric poles

varies. Therefore, judge if it is normal or abnormal based on if there is operation of the motor or not; the resistance values cannot be used to judge the abnormality. However, it is difficult to judge accurately, if it is not clear, replace the motor.

Pin 1 and 3

Pin 2 and 4

37Ω ± 10%

Table 3-2. Sensor check point

Sensor name Check point Signal level Switch mode

PE Sensor CN3 / Pin 1 and 2

Scanner HP Sensor CN13 / Pin 1 and 2 —

Less than 0.4V Off : No paper

More than 2.4V On : Detect the paper

On : Within Scanner Carriage

home position

Off: Out of Scanner Carriage

home position

3.2 Error Indications and Fault Occurrence Causes

This section describes the LED indications, STM3 messages and fault occurrence causes at occurrence of the following errors during any sequence/operation (e.g. power-on sequence, paper feeding/loading sequence, ink sucking sequence).

NOTE: The STM3 windows shown in the table in the following pages are the

ones of Stylus CX3800, however, other models show almost the same diplays as those except the following items:

1) SPC name (SPC: Scanner/Printer/Copier)

2) T-code for each ink cartridge (refer to

Table 1-13 (p.17))

TROUBLESHOOTING Overview 62

Page 63

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-3. Error Indications and Fault Occurrence Causes

Printer Status Communication error Ink low Double feed Paper out

Power — — — — Error — — On On Ink — Blink Off Off

Indications

Status monitor 3 message

7-seg. — — — —

Paper Size

1 — — — — 2 — — — —

Fit to Page — — — —

This error is detected when the SPC cannot communicate with the PC correctly.

Fault Occurrence Cause

This error is detected when the ink consumption amount reaches about 90%.

Note : Even if this error is indicated on the STM3, you can continue the printing until I/C becomes Ink Out condition. However, the Head Cleaning operation cannot be done so that the remaining ink is low condition.

This error is detected at resending of paper for double-sided printing when paper length is determined to be other than default value.

This error is detected when the top of a paper is not detected with the PE Sensor in the paper loading sequence.

Note : “–” : No change

TROUBLESHOOTING Error Indications and Fault Occurrence Causes 63

Page 64

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-4. Error Indications and Fault Occurrence Causes

Printer Status Ink out or No Ink cartridge CSIC error Incorrect I/C Paper jam

Power — — — — Error Off Off Off Blink Ink On On On Off

Indications

Status monitor 3 message

7-seg. — — — —

Paper Size

1 — — — — 2 — — — —

Fit to Page — — — —

Fault Occurrence Cause

This error is detected when;

• The ink consumption amount reaches 100%.

• The ink cartridge is defective.

Note : The slight amount of the ink is remaining in the I/C even if the Ink Out error is detected. This is to prevent the Print Head nozzle from the printing operation without firing the ink.

This error is detected when data from CSIC cannot be read normally or when data cannot be written to CSIC.

This error is detected when;

• An unsupported ink cartridge has been installed.

• An ink cartridge with a different destination has been installed.

This error is detected when the PE Sensor cannot properly detect the paper bottom edge during feeding of paper.

Note : “–” : No change

TROUBLESHOOTING Error Indications and Fault Occurrence Causes 64

Page 65

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-5. Error Indications and Fault Occurrence Causes

Printer Status Maintenance request Fatal error (Mechanism)

Power Blink Blink Error On Blink Ink On Blink

Indications

Status monitor 3 message

7-seg. “E” blink “E” blink

Paper Size

Fit to Page Blink Blink

1 Blink Blink 2 Blink Blink

Fault Occurrence Cause

Note : “–” : No change

This error is detected when the Waste Ink Counter exceeds the preset counter value.

This error is detected when it is determined that the printer cannot operate properly. (CR error, PF error, etc.)

TROUBLESHOOTING Error Indications and Fault Occurrence Causes 65

Page 66

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

3.3 Troubleshooting

You can identify the troubles by using the checklist in this section after confirming the LED indication on the SPC. If you connect the SPC to your PC and see an error message on the STM3, you can short the total repair time. And, when you find out the defective parts, replace them by referring the Chapter 4 “DISASSEMBLY AND ASSEMBLY”. The following tables describe the error check points.

Table 3-6. Check point for the communication error according to each phenomenon

Occurrence

timing

CR position

Detailed phenomenon

Defective

unit/part name

Check point Remedy

1. Check if the Panel FFC is connected to the CN1 on the Panel Board.

CN1 Panel BoardPanel FFC

1. Connect the Panel FFC to CN1 on the Panel Board.

• Power on

•Anywhere

When turning on the power, the SPC does not operate at all.

Panel Unit

2. Check if the Panel FFC is not damaged. 2. Replace the Panel FFC with new one.

3. Check if the Panel Board is not damaged. 3. Replace the Panel Board with new one.

TROUBLESHOOTING Troubleshooting 66

Page 67

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-6. Check point for the communication error according to each phenomenon

Occurrence

timing

CR position

Detailed phenomenon

Defective

unit/part name

Check point Remedy

1. Check if the PS Board Connector Cable is connected to the CN10 on the Main Board.

Main Board

CN1

1. Connect the PS Board Connector Cable to CN1 on the Main Board.

• Power on

•Anywhere

• Operation

•–

When turning on the power, the SPC does not operate at all.

When turning on the power, the power on sequence is performed correctly. But, when any printer job is sent to the SPC, a communication error is indicated with STM3.

PS Board Unit

USB Cable

Main Board Unit

2. Check if the PS Board Connector Cable/PS Board is not damaged.

PS Board Connector Cable

PS Board Unit

1. Check if the USB Cable is connected between the SPC and the PC.

1. Check if an incorrect model name is not stored into the address of the EEPROM on the Main Board.

2. Check if the Panel FFC is connected to the CN12 on the Main Board.

Panel FFC

CN12

Main Board

2. Replace the PS Board Unit with new one. * If the problem is not solved, replace the

Main Board with new one.

1. Connect the USB Cable to the SPC and the PC.

1. Use the Adjustment Program to write the correct value to the EEPROM address.

2. Connect the Panel FFC to the CN12 on the Main Board.

TROUBLESHOOTING Troubleshooting 67

Page 68

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-7. Check point for the error before the initial ink charge according to each phenomenon

Occurrence

timing

CR position

• Power on

•Inside HP

• Power on

•Anywhere

Detailed phenomenon

The SPC does not perform the initial ink charge and an error is indicated with LEDs and STM3.

The SPC does not perform the ink replacement CL and an error is indicated with LEDs and STM3.

The SPC does not perform the printing operation and an error is indicated with LEDs and STM3.

Defective

unit/part name

Ink Cartridge

Main Board

Ink Cartridge

Check point Remedy

1. Check if the Ink Cartridge can be used by installing it to other SPC.

1. Check if an incorrect data is not stored into the address of the EEPROM on the Main Board.

1. Check if the Ink Cartridge can be used by installing it to other SPC.

1. Check if the ink is remaining in the Ink Cartridge. 1. Replace the Ink Cartridge with a brand-new

2. Check if the Ink Cartridge can be used by installing it to other SPC.

1. Replace the Ink Cartridge with a brand-new one.

1. Set the proper destination by using Adjustment Program.

1. Replace the Ink Cartridge with a brand-new one.

one.

2. Replace the Ink Cartridge with a brand-new one.

TROUBLESHOOTING Troubleshooting 68

Page 69

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-8. Check point for the Double feed error according to each phenomenon

Occurrence

timing

CR position

Detailed phenomenon

Defective

unit/part name

Check point Remedy

1. Check if the Extension Spring Retard operates correctly in the paper loading sequence.

Extension Spring Retard

1. Set the Extension Spring Retard between the Retard Roller Unit and the ASF Frame.

• Operation

•–

After both surfaces were printed, the paper was ejected but an error is displayed.

ASF Unit

2. Check if the Paper Back Lever operates correctly in the paper loading sequence.

Paper Back LeverTorsion Spring 6.45

2. Set the Torsion Spring 6.45 between the ASF Frame and the Paper Back Lever.

TROUBLESHOOTING Troubleshooting 69

Page 70

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-9. Check point for the paper out error according to each phenomenon

Occurrence

timing

CR position

• Operation

•–

Detailed phenomenon

The LD Roller cannot pick up paper although the LD Roller attempt to rotate correctly.

Defective

unit/part name

Holder Shaft Unit

Check point Remedy

1. Check if any paper dust is not adhered to the surface of the LD Roller.

LD Roller

1. Check if the Hopper operates correctly in the paper loading sequence.

Hopper

1. Set a cleaning sheet in the ASF Unit up side down. Then holding the top edge, try to load the paper from the Printer driver. The micro pearl on the LD Roller surface is removed. To remove severe smear, staple a cloth moistened with alcohol to a post card and clean the roller in the same manner.

Non-adhesive Area

CL Sheet

Adhesive Area

This side down

(Use a post card for the base sheet)

*If the problem is not solved, replace the Holder shaft unit with new one.

Staplers

Cloth moistened with alcohol

1. Reassemble the Compression Spring 2.51 between the ASF Frame and the Hopper.

• Operation

•–

paper loading sequence although the LD Roller rotates to load paper from the

ASF Unit

ASF Unit.

The Hopper does not operate during the

Compression Spring

2.51

TROUBLESHOOTING Troubleshooting 70

Page 71

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-9. Check point for the paper out error according to each phenomenon

Occurrence

timing

CR position

Detailed phenomenon

Defective

unit/part name

Check point Remedy

1. Check if the Extension Spring 0.143 does not come off in the Clutch mechanism.

Extension Spring 0.143

1. Reassemble the Extension Spring 0.143 in the Clutch mechanism.

• Operation

•–

The drive of the PF Motor is not transmitted to the LD Roller Shaft.

Holder Shaft Unit

2. Check if the Clutch does not come off from the dowel of the LD Roller Shaft.

Clutch tooth

Dowel

3. Check if the Clutch tooth is not damaged. 3. Replace the Holder Shaft Unit with a new

4. Check if the Clutch is not damaged. 4. Replace the Holder Shaft Unit with a new

2. Reassemble the round portion of the Clutch on the dowel of the LD Roller Shaft.

one.

TROUBLESHOOTING Troubleshooting 71

Page 72

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-9. Check point for the paper out error according to each phenomenon

Occurrence

timing

CR position

Detailed phenomenon

Defective

unit/part name

Check point Remedy

1. Check if the Compression Spring 2.36 does not come off in the Change Lever.

1. Replace the Ink System Unit with a new one.

• Operation

•–

• Operation

•–

The drive of the PF Motor is not transmitted to the LD Roller Shaft.

The LD Roller is not set to the ASF home position and paper is always loaded from the ASF Unit during the paper loading sequence.

Ink System Unit

Change Lever

Compression Spring 2.36

1. Check if the tip of the Change Lever is not damaged. 1. Replace the Ink System Unit with a new one.

Ink System Unit

TROUBLESHOOTING Troubleshooting 72

Page 73

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-10. Check point for the No ink cartridge/CSIC error/Incorrect ink cartridge according to each phenomenon

Occurrence

timing

CR position

Detailed phenomenon

Defective

unit/part name

Ink Cartridge

Check point Remedy

1. Check if Ink Cartridge is properly installed. 1. Install the Ink Cartridge properly.

2. Check if the Memory Chip is not disconnected or not

2. Replace the Ink Cartridge with a new one.

chipped.

Memory Chip

• Power on

•Inside HP

After the Carriage has detected the HP, an error is displayed.

CSIC Board

CSIC Connector

1. Check if the Head FFC is connected to connector on the CSIC Board.

Head FFC

Connector

1. Connect the Head FFC to connector on the CSIC Board.

2. Check if the CSIC Board is not damaged. 2. Replace the Carriage Unit with a new one.

3. Check if the CSIC Connector is not damaged. 1. Replace the Carriage Unit with a new one.

CSIC Board

CSIC Connectors

TROUBLESHOOTING Troubleshooting 73

Page 74

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-11. Check point for the paper jam error according to each phenomenon

Occurrence

timing

CR position

Detailed phenomenon

Defective

unit/part name

ASF Unit

Check point Remedy

1. Check if the ASF Unit is properly installed. 1. Install the ASF Unit properly.

2. Check if the Paper Back Lever operates correctly in the paper loading sequence.

Paper Back LeverTorsion Spring 6.45

2. Set the Torsion Spring 6.45 between the ASF Frame and the Paper Back Lever.

• Operation

•Outside HP

The paper feeding sequence is performed without loading paper in the paper loading sequence.

Holder Shaft Unit

1. Check if the Torsion Spring 0.22 is properly installed. 1. Set the Torsion Spring 0.22 between the

PE Sensor

Torsion

Spring 0.22

PE Sensor Lever

Holder Shaft and the PE Sensor Lever.

TROUBLESHOOTING Troubleshooting 74

Page 75

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-11. Check point for the paper jam error according to each phenomenon

Occurrence

timing

CR position

• Operation

•Outside HP

Detailed phenomenon

Paper is being resent during paper feeding operation.

Defective

unit/part name

ASF Unit

Check point Remedy

1. Check if the Extension Spring Retard operates correctly in the paper loading sequence.

Extension Spring Retard

1. Set the Extension Spring Retard between the Retard Roller Unit and the ASF Frame.

When turning on the power, the Carriage Unit move to the home position correctly. But, the paper feeding sequence is performed without loading paper in the paper loading sequence.

• Operation

•–

* The Carriage Unit can move to home position even if the Torsion Spring 0.22 comes off. However, the PE Sensor Lever keeps the high signal condition in the next operation. Therefore, the paper

jam error is detected.

** In case that the paper jam error occurs in each operation, the jammed paper contacts the nozzle surface of the Print Head and the Print Head may be damaged.

The leading edge of paper does not go through between the EJ Roller Unit and the Star Wheel.

Holder Shaft Unit*

EJ Frame Unit**

Paper Guide Front

Unit

1. Check if the Torsion Spring 0.22 is properly installed. 1. Set the Torsion Spring 0.22 between the Holder Shaft and the PE Sensor Lever.

1. Check if the EJ Frame Unit is correctly assembled. 1. Reassemble the EJ Frame Unit correctly.

EJ Frame Unit

2. Check if the Paper Guide Front Unit is correctly

assembled.

Paper Guide Front Unit

Spur Gear 36

2. Reassemble the Paper Guide Front Unit correctly.

TROUBLESHOOTING Troubleshooting 75

Page 76

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-11. Check point for the paper jam error according to each phenomenon

Occurrence

timing

CR position

Detailed phenomenon

The leading edge of paper does not go through between the EJ Roller Unit and the Star Wheel.

Defective

unit/part name

EJ Frame Unit**

Check point Remedy

3. Check if the Star Wheel Holders does not come off. 3. Reassemble the Star Wheel Holders

Star Wheel Holders

correctly.

• Operation

•–

The leading edge of paper is not loaded to the PF Roller Unit.

* The Carriage Unit can move to home position even if the Torsion Spring 0.22 comes off. However, the PE Sensor Lever keeps the high signal condition in the next operation. Therefore, the paper

jam error is detected.

** In case that the paper jam error occurs in each operation, the jammed paper contacts the nozzle surface of the Print Head and the Print Head may be damaged.

Paper Guide Upper

Unit **

4. Check if the Spur Gear 36 is not damaged. 4. Replace the EJ Frame Unit with a new one.

1. Check if the Paper Guide Upper Unit is correctly assembled.

Paper Guide Upper Unit

1. Reassemble the Paper Guide Upper Unit to the Main Frame correctly.

TROUBLESHOOTING Troubleshooting 76

Page 77

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-12. Check point for the Fatal error according to each phenomenon

Occurrence

timing

CR position

• Power on

•Anywhere

Detailed phenomenon

The Scanner Unit does not initialize when the power is turned on.

Defective

unit/part name

Scanner Motor

Check point Remedy

1. Check if the Scanner Motor Connector Cable is connected to CN10 on the Main Board.

CN10

Scanner Motor

Connector Cable

2. Check if the coil resistance of the Scanner Motor is about 37Ω by using the tester (refer to Table 3-1).

1. Connect the Scanner Motor Connector Cable to CN10 on the Main Board.

2. Replace the Scanner Motor with a new one.

Scanner Motor

3. Check if the Scanner Motor Connector Cable is not damaged.

3. Replace the Scanner Motor with a new one.

TROUBLESHOOTING Troubleshooting 77

Page 78

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-12. Check point for the Fatal error according to each phenomenon

Occurrence

timing

CR position

Detailed phenomenon

Defective

unit/part name

Check point Remedy

• Power on

•Anywhere

The Scanner Unit does not initialize when the power is turned on.

Scanner HP Sensor

1. Check if the Scanner HP Sensor Connector Cable is connected to CN13 on the Main Board.

CN13

Scanner HP Sensor

Connector Cable

2. Check if the Scanner HP Sensor Connector Cable is not damaged.

1. Connect the Scanner HP Sensor Connector Cable to CN13 on the Main Board.

2. Replace the Scanner HP Sensor with a new one.

3. Check if the Scanner HP Sensor is not damaged. 3. Replace the Scanner HP Sensor with a new one.

Scanner HP Sensor

1. Check if the Scanner Carriage FFC is connected to CN11

on the Main Board.

1. Connect the Scanner Carriage FFC to CN11 on the Main Board.

Scanner Carriage FFC

CN11

Scanner Carriage

FFC

2. Check if the Scanner Carriage FFC is not damaged. 2. Replace the Scanner Carriage FFC with a new one.

TROUBLESHOOTING Troubleshooting 78

Page 79

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-12. Check point for the Fatal error according to each phenomenon

Occurrence

timing

CR position

• Power on

•Anywhere

Detailed phenomenon

The Scanner Unit does not initialize when the power is turned on.

Defective

unit/part name

Scanner Carriage

Unit

Check point Remedy

1. Check if the Scanner Carriage Unit is not damaged. 1. Replace the Scanner Carriage Unit with a new one.

Scanner Carriage Unit

• Power on

•Anywhere

When turning on the power, the CR Motor does not operate at all.

When turning on the power, the PF Motor does not operate at all.

CR Motor

PF Motor

1. Check if the CR Motor Connector Cable is connected to

CN8 on the Main Board.

CR Motor

Connector Cable

CR Motor

CN8

1. Connect the CR Motor Connector Cable to CN8 on the Main Board.

2. Check if the CR Motor Connector Cable is not damaged. 2. Replace the CR Motor with a new one.

3. Check if the CR Motor operates. 3. Replace the CR Motor with a new one.

1. Check if the PF Motor Connector Cable is connected to CN9 on the Main Board.

PF Motor

Connector Cable

CN9

PF Motor

1. Connect the PF Motor Connector Cable to CN9 on the Main Board.

2. Check if the PF Motor Connector Cable is not damaged. 2. Replace the PF Motor with a new one.

3. Check if the PF Motor operates. 3. Replace the PF Motor with a new one.

TROUBLESHOOTING Troubleshooting 79

Page 80

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-12. Check point for the Fatal error according to each phenomenon

Occurrence

timing

CR position

Detailed phenomenon

Defective

unit/part name

Check point Remedy

• Power on

•Anywhere

• Power on

•Anywhere

When turning on the power, the Carriage Unit collides to the Change Lever located to the front side of the printer.

The Carriage Unit collides with the Guide Upper Unit when power is turned on.

PF Motor

Ink System Unit

Paper Guide

Upper Unit

1. Check if the PF Motor Connector Cable is connected to CN9 on the Main Board.

2. Check if the PF Motor Connector Cable is not damaged. 2. Replace the PF Motor with a new one.

3. Check if the PF Motor operates. 3. Replace the PF Motor with a new one.

1. Check if the Compression Spring 2.36 does not come off in the Change Lever.

Change Lever

Compression Spring 2.36

1. Check if the Paper Guide Upper Unit is correctly assembled.

Paper Guide Upper Unit

1. Connect the PF Motor Connector Cable to CN9 on the Main Board.

1. Replace the Ink System Unit with a new one.

1. Reassemble the Paper Guide Upper Unit to the Main Frame correctly.

TROUBLESHOOTING Troubleshooting 80

Page 81

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-12. Check point for the Fatal error according to each phenomenon

Occurrence

timing

CR position

Detailed phenomenon

Defective

unit/part name

Check point Remedy

• Power on

•Anywhere

When turning on the power, the Carriage Unit collides to the right side of the Main Frame.

CR Scale

1. Check if the CR Scale does not come off or it properly passes through the slit of the CR Encoder Board.

Slit of the CR

Encoder Board

2. Check if the CR Scale is not damaged or contaminated. 2. Replace the CR Scale with a new one or clean

CR Scale

1. Check if the Encoder FFC is connected to the CR Encoder Board.

Encoder FFCCR Encoder Board

1. Reassemble the CR Scale correctly.

* If the problem is not solved, replace the

Main Board with a new one.

it completely.

1. Connect the Encoder FFC to the CR Encoder Board.

CR Encoder Board

2. Check if the Encoder FFC is not damaged. 2. Replace the Encoder FFC with a new one.

3. Check if the CR Encoder Board is not damaged. 3. Replace the CR Encoder Board with a new one.

TROUBLESHOOTING Troubleshooting 81

Page 82

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-12. Check point for the Fatal error according to each phenomenon

Occurrence

timing

CR position

Detailed phenomenon

Defective

unit/part name

Check point Remedy

1. Check if the PF Scale is not damaged or contaminated. 1. Replace the PF Scale with a new one.

PF Encoder Sensor

• Power on

•Anywhere

• Operation

•Anywhere

• Operation

•Anywhere

The eject rollers are rotating at high speed when power is turned on. (For about 1 cycle.)

The Scanner Carriage Unit does not operate.

The paper feeding sequence is performed without loading a paper in the paper loading sequence.

PF Scale /

Main Board Unit

Scanner Carriage

Shaft

Holder Shaft Unit

PF Scale

2. Check if the PF Encoder Sensor is not damaged. 2. Replace the Main Board Unit with a new one.

1. Check if the grease is enough on the surface of the

Scanner Carriage Shaft.

2. Check if the Scanner Carriage Shaft is set correctly. 2. Reassemble the Scanner Carriage Shaft to the

1. Check if the PE Sensor Connector Cable is connected to

CN3 on the Main Board.

CN3

2. Check if the PE Sensor Connector Cable is not damaged. 2. Replace the PE Sensor with a new one.

3. Check if the PE Sensor is not damaged. 3. Replace the PE Sensor with a new one.

PE Sensor Connector Cable

1. After wiping the grease on the Scanner Carriage Shaft with a dry, soft cloth, coat it with grease. (Refer to Chapter 6 “MAINTENANCE”.)

Scanner Carriage Unit.

1. Connect the PE Sensor Connector Cable to CN3 on the Main Board.

TROUBLESHOOTING Troubleshooting 82

Page 83

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-12. Check point for the Fatal error according to each phenomenon

Occurrence

timing

CR position

Detailed phenomenon

Defective

unit/part name

Check point Remedy

• Operation

•Anywhere

The Carriage Unit climbs over the Slider Lock Lever set to the wiping position and the Carriage Unit collides to its lever.

Front Frame

Main Frame

1. Check if the Slider Lock Lever is correctly released by the CR movement.

Slider Lock Lever

1. Check if the Slider Lock Lever is correctly released by the CR movement.

1. Replace the Front Frame with a new one.

1. Replace the Printer Mechanism with a new one.

TROUBLESHOOTING Troubleshooting 83

Page 84

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

3.3.1 Superficial Phenomenon-Based Troubleshooting

This section explains the fault locations of the error states (print quality and abnormal noise) other than the error states (LED and STM3) in the previous section.

Table 3-13. Check point for multiple sheets of paper are always loaded without LEDs and STM3

Occurrence

timing

CR position

Detailed phenomenon

Defective

unit/part name

Check point Remedy

1. Check if the Extension Spring Retard operates correctly in the paper loading sequence.

Extension Spring Retard

1. Set the Extension Spring Retard between the Retard Roller Unit and the ASF Frame.

• Operation

•–

The LEDs and STM3 are not indicating error conditions. But, multiple sheets of paper are always loaded from the ASF Unit.

ASF Unit

2. Check if the Paper Back Lever operates correctly in the paper loading sequence.

Paper Back LeverTorsion Spring 6.45

2. Set the Torsion Spring 6.45 between the ASF Frame and the Paper Back Lever.

TROUBLESHOOTING Troubleshooting 84

Page 85

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-14. Check point for the abnormal noise

Occurrence

timing

CR position

•Anywhen

•Anywhere

Scanned image

Quality State

• Scanned image is not clear.

Detailed phenomenon

The abnormal noise occurs at the first power on timing and during each operation although the printing operation is performed.

The bottom of the Carriage Unit contacts the surface of the EJ Frame Unit.

The Carriage Unit collides to the Paper Guide Upper Unit during each operation.

Detailed phenomenon

There are dusts on the Document Glass. (white dots appear on the scanned image)

There are dusts on the LED in the Rod Lens Array. (vertical stripes appear on the scanned image)

The LED of Scanner Carriage Unit does not light up.

Defective

unit/part name

1. Check if the grease on the Carriage Guide Shaft is

Carriage Unit

Front Frame

Ink System Unit 1. Check if the Change Lever moves smoothly. 1. Replace the Ink System Unit with a new one.

EJ Frame Unit

Paper Guide Upper

Unit

sufficient.

1. Check if the grease on the Front Frame is sufficient. 1. Wipe off the remaining grease on the Front

1. Check if the EJ Frame Unit is not bent up. 1. Replace the EJ Frame Unit with a new one.

1. Check if the Paper Guide Upper Unit is attached securely. (check if it interferes with the Carriage Unit)

Check point Remedy

1. Wipe off the remaining grease on the Carriage Guide Shaft and lubricate it on its shaft.

Frame and lubricate it on its frame.

1. Reassemble the Paper Guide Upper to the Main Frame.

Table 3-15. Check point for poor scanned image quality

Defective

unit/part name

Scanner Housing

Upper

Scanner Carriage

Unit

Scanner Carriage

Unit

1. Check if there is not any dust on the Document Glass. 1. Remove the extraneous matter from the

1. Check if there is not any dust on the LED. 1. Remove the extraneous matter from the

1. Check if the LED lights up. 1. Replace the Scanner Carriage Unit with new

Check point Remedy

Document Glass. (Refer to the Chapter 6 “MAINTENANCE”.)

Document Glass (blow away the dusts).

one.

TROUBLESHOOTING Troubleshooting 85

Page 86

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-16. Check point for the poor printing quality

Print Quality

State

Detailed phenomenon

Defective

unit/part name

Check point Remedy

1. Check if there is not any foreign material/damage around the seal rubber part on the Cap Unit.

Seal rubber part

1. Remove the foreign material around the seal rubber parts carefully.

• Dot missing and mixed colors

Ink is scarcely ejected to the Cap from the Print Head.

Ink is ejected to the Cap from the Print Head, but the SPC does not recover from the error after cleaning or ink change.

Ink System Unit

(Cap Unit)

2. Check if the Compression Spring is correctly mounted on the Cap Unit.

1. Check if it returns to normal by performing CL operation or replacing the Ink Cartridge.

Print Head

2. Check if the Print Head is not damaged. 2. Replace the Print Head with a new one.

Cleaner Blade

Main Board 1. Check if the Main Board is not damaged. 1. Replace the Main Board with a new one.

1. Check if the Cleaner Blade does not have paper dust or bending.

Compression

Spring

2. Replace the Ink System Unit with a new one.

1. Perform CL operation and the Ink Cartridge replacement specified times. If it doesn’t work, change the Print Head with a new one.

1. Replace Ink System Unit with a new one.

TROUBLESHOOTING Troubleshooting 86

Page 87

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-16. Check point for the poor printing quality

Print Quality

State

• White streak / abnormal discharge

Detailed phenomenon

Ink is ejected to the Cap from the Print Head, but printing is not done at all after cleaning or ink change, or abnormal discharge occurs.

Defective

unit/part name

1. Check if the Head FFC is securely connected to the Print Head Connectors and the Main Board Connectors (CN5,

Check point Remedy

1. Connect the Head FFC to the Print Head and the Main Board Connectors.

CN6, CN7).

Print Head

CN6 CN5 CN7

Head FFC

Head

Connectors

FFC

2. Check if the Head FFC is not damaged. 2. Replace the Head FFC with a new one.

Print Head

1. Check if it returns to normal by performing CL operation or replacing the Ink Cartridge.

1. Perform CL operation and the Ink Cartridge replacement specified times. If it doesn’t work, change the Print Head with a new one.

Main Board Unit 1. Check if the Main Board is not damaged. 1. Replace the Main Board Unit with a new one.

TROUBLESHOOTING Troubleshooting 87

Page 88

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-16. Check point for the poor printing quality

Print Quality

State

• White streak/ color unevenness occurrence

Detailed phenomenon

Vertical banding appears against the CR movement direction. And, it looks like uneven printing.

CR movement

direction

[Note] If the problem is not solved, replace the CR Motor with a new one.

Defective

unit/part name

Adjustment

Print Head

Carriage Unit /

Carriage Guide

Shaft

EJ Frame

Check point Remedy

1. For printing in the Bi-D mode, check if Bi-D Adjustment has been performed properly.

1. Perform Bi-D Adjustment to eliminate displacements between the upper and lower rules. (Refer to Chapter 5 “ADJUSTMENT”.)

1. Check if each segment is printed correctly in the Nozzle Check Pattern.

1. Perform Head Cleaning and check the Nozzle Check Pattern. (Refer to Chapter 5 “ADJUSTMENT”.) If the problem is not solved, replace the Print Head with a new one.

1. Check if there is not any foreign material on the surface of the Carriage Guide Shaft.

2. Check if the Carriage Guide Shaft is properly secured to Main Frame by the CR Guide Shaft Torsion Spring and

1. Remove foreign objects from surface of the Carriage Guide Shaft.

2. Reassemble the Carriage Guide Shaft correctly.

the CR Guide Shaft Pressing Spring.

CR Guide Shaft

Torsion Spring

3. Check if the grease is enough on the surface of the Carriage Guide Shaft.

CR Guide Shaft

Pressing Spring

3. After wiping the grease on the Carriage Guide Shaft and the Carriage with a dry, soft cloth, coat it with grease. (Refer to Chapter 6 “MAINTENANCE”.)

4. Check if any damage is not observed on the surface of the Carriage Guide Shaft.

1. Check if there is not any foreign material on the surface

4. Replace the Carriage Guide Shaft with a new one.

1. Remove foreign matter from the EJ Frame.

of the EJ Frame.

2. Check if the EJ Frame is lubricated with enough grease. 2. After wiping the grease on the EJ Frame with a dry, soft cloth, coat it with grease. (Refer to Chapter 6 “MAINTENANCE”.)

3. Check if the EJ Frame has not been deformed. 3. Replace the EJ Frame with a new one.

TROUBLESHOOTING Troubleshooting 88

Page 89

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-16. Check point for the poor printing quality

Print Quality

State

• White streak/ color unevenness occurrence

Detailed phenomenon

Micro banding appears horizontally against the CR movement direction and it appears with the same width.

CR movement

direction

[Note] If the problem is not solved, replace the PF Motor with a new one.

The Star wheel mark against the CR movement direction.

Defective

unit/part name

Printer driver & exclusive paper

Print Head

PF Roller Unit

Check point Remedy

1. Check if the suitable paper is used according to the printer driver setting.

1. Check if each segment is printed correctly in the Nozzle Check Pattern.

1. Check if there is not any foreign material on the surface of the PF Roller Unit.

PF Roller Unit

2. Check if the PF Roller Unit is not damaged. 2. Replace the PF Roller Unit with a new one.

1. Check if the Star Wheel Holder does not come off. 1. Reassemble the Star Wheel Holder correctly.

2. Check if the surface of the EJ Frame Unit is flat. 2. Replace the EJ Frame Unit with a new one.

1. Use the suitable paper according to the printer driver setting.

1. Perform the Head Cleaning and check the Nozzle Check Pattern. (Refer to Chapter 5 “ADJUSTMENT”.) If the problem is not solved, replace the Print Head with a new one.

1. Clean the surface of the PF Roller Unit carefully with the soft cloth.

EJ Frame Unit

Printing is blurred.

Printer driver & exclusive paper

Print Head

1. Check if the suitable paper is used according to the printer driver setting.

1. Check if the correct Head ID is stored into the EEPROM by using the Adjustment Program.

1. Use the suitable paper according to the printer driver setting.

1. Input 13 digits code of the Head ID into the EEPROM by using the Adjustment Program.

TROUBLESHOOTING Troubleshooting 89

Page 90

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-16. Check point for the poor printing quality

Print Quality

State

•Print start position slip

• Ink stain of paper

Detailed phenomenon

The printing operation is correctly performed. But, the top margin is insufficient than usual one.

Ink stain occurs at the back, top end or bottom end of the print paper.

Defective

unit/part name

Holder Shaft Unit

Paper Guide Front

Unit

Check point Remedy

1. Check if any paper dust is not adhered to the surface of the LD Roller.

LD Roller

1. Check if the Paper Guide Front Unit does not have the ink stain.

Porous Pad Paper Guide Front

Paper Guide Front Unit

1. Set a cleaning sheet in the ASF up side down. Then holding the top edge, try to load the paper from the Printer driver. The micro pearl on the LD Roller surface is removed. To remove severe smear, staple a cloth moistened with alcohol to a post card and clean the roller in the same manner. As for the cleaning sheet, refer to page 70 “Remedy of the Paper out error” * If the problem is not solved, replace the

Holder Shaft Unit with a new one.

1. Clean the Paper Guide Front Unit with a soft cloth.

2. Check if heaps of ink are not formed on Porous Pad Paper Guide Front.

EJ Frame Unit 1. Check if the EJ Roller Unit does not have the ink stain. 1. Clean the EJ Roller Unit with a soft cloth.

PF Roller Unit 1. Check if the PF Roller Unit does not have the ink stain. 1. Clean the PF Roller Unit with a soft cloth.

2. Replace the Paper Guide Front Unit with a new one.

TROUBLESHOOTING Troubleshooting 90

Page 91

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

Table 3-16. Check point for the poor printing quality

Print Quality

State

• Ink stain of paper

Detailed phenomenon

Ink sticks to other than the print area of the paper, resulting in contamination

Defective

unit/part name

Print Head

Paper Guide Upper

Unit

EJ Frame Unit

Check point Remedy

1. Check if the Print Head Cover does not have the ink drop. 1. Clean the Print Head Cover carefully with a soft cloth.

1. Check if the Paper Guide Upper Unit does not have the

ink stain.

1. Check if the Star Wheel Rollers does not have the ink

stain.

Star Wheel Rollers

1. Clean the Paper Guide Upper Unit with a soft cloth.

1. Clean the Star Wheel Rollers with a soft cloth.

TROUBLESHOOTING Troubleshooting 91

Page 92

DISASSEMBLY/ASSEMBLY

CHAPTER

Page 93

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

4.1 Overview

This section describes procedures for disassembling the main components of the Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850. Unless otherwise specified, disassembly units or components can be reassembled by reversing the disassembly procedure. Things, if not strictly observed, that could result in injury or loss of life are described under the heading “Warning”. Precautions for any disassembly or assembly procedures are described under the heading “CAUTION”. Tips for disassembling procedures are described under the heading “CHECK POINT”. If the assembling procedure is different from the reversed procedure of the disassembling, the procedure is described under the heading “REASSEMBLY”. Any adjustments required after reassembling the units are described under the heading “ADJUSTMENT REQUIRED”. When you have to remove any units or parts that are not described in this chapter, refer to the exploded diagrams in the appendix.

Read precautions described in the next section before starting work.

4.1.1 Precautions

See the precautions given under the heading “WARNING” and “CAUTION” in the following column when disassembling or assembling Stylus CX3700/CX3800/ CX3805/CX3810/DX3800/DX3850.

W A R N I N G

 Disconnect the power cable before disassembling or assembling

the printer.

 If you need to work on the printer with power applied, strictly

follow the instructions in this manual.

 Wear protective goggles to protect your eyes from ink. If ink

gets in your eye, flush the eye with fresh water and see a doctor immediately.

 Always wear gloves for disassembly and reassembly to avoid

injury from sharp metal edges.

 To protect sensitive microprocessors and circuitry, use static

discharge equipment, such as anti-static wrist straps, when accessing internal components.

 Never touch the ink or wasted ink with bare hands. If ink comes

into contact with your skin, wash it off with soap and water immediately. If irritation occurs, contact a physician.

C A U T I O N

 When transporting the printer after installing the ink

cartridge, be sure to pack the printer for transportation without removing the ink cartridge.

 Use only recommended tools for disassembling, assembling or

adjusting the printer.

 Observe the specified torque when tightening screws.  Apply lubricants as specified. (Refer to “6.1.3 Lubrication

(p151)” for details.)

 Make the specified adjustments when you disassemble the

printer. (Refer to Chapter5 ADJUSTMENT for details.)

 Make sure the tip of the waste ink tube is located at correct

position when reassembling the waste ink tube. Otherwise it will cause ink leakage.

 When using compressed air products; such as air duster, for

cleaning during repair and maintenance, the use of such products containing flammable gas is prohibited.

4.1.2 Tools

Use only specified tools to avoid damaging of the printer.

Table 4-1. Tools

Name Supplier

Phillips Screwdriver (No.1)

Phillips Screwdriver (No.2)

Flathead Screwdriver

Precision Screwdriver #1 (-)

Tweezer

Longnose pliers

Acetate Tape

Note * : Available in the market

EPSON 1080530

EPSON 1080532

EPSON 1080527

EPSON 1080525

EPSON 1080561

EPSON 1080564

EPSON 1003963

Part No.

DISASSEMBLY/ASSEMBLY Overview 93

Page 94

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

4.1.3 Work Completion Check

If any service is made to the printer, use the checklist shown below to confirm all works are completed properly and the printer is ready to be returned to the user.

Table 4-2. Work Completion Check

Classification Part Check Item

Printer unit Self test Operation is normal?

On line test Print is normally done?

Print Head (nozzle check pattern print)

CR mechanism CR smoothly operates?

Paper loading mechanism

Ink gets out normally from all the nozzles?

CR makes abnormal sound during its operation?

Paper is smoothly loaded?

Paper jam does not happen?

Paper does not warp during paper loading?

Multiple papers are not fed?

Abnormal sound is not heard during paper loading?

There is no obstacles at paper route?

Check

Column

OK / NG

Table 4-2. Work Completion Check

Classification Part Check Item

Scanner unit Mechanism Glass surface is not dirty?

Alien substance is not mixed in the CR movement area?

CR mechanism CR smoothly operates?

CR operates together with scanner unit?

CR makes abnormal sound during its operation?

LED LED normally turns on and white

reflection test is done near home position?

On line test On line test Operation is normal?

Copy Copy Local copy is normal?

Adjustment Designated

adjustment items

Lubrication Designated

lubrication items

Function Firmware version The newest version

Dispatch packing

Ink cartridge Ink cartridge is normally installed?

Waste Ink Pads Remaining life of waste ink pads are

Adjustment condition is suitable?

Lubrication is done at designated place?

Lubrication volume is suitable?

sufficient?

Check

Column

OK / NG

Protection during distribution

Others Attached goods All of attached goods from users are

Printer CR is in the cap position?

packed?

OK / NG

DISASSEMBLY/ASSEMBLY Overview 94

Page 95

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

4.2 Caution regarding Assembling/Disassembling of the Printer Mechanism, and How to Ensure of Quality on Re-assembled Product

On current low end models, we basically forbade to remove Housing Lower from Printer Mechanism in your repair. This is because there is a possibility of Main Frame deformation when a part (such as Ink System Unit) is removed from Printer Mechanism without Housing Lower. For this reason, we recommend that a new Printer Mechanism be replaced along with the Housing Lower when a part cannot be replaced without removing the Printer Mechanism. On these models, you have to remove Housing Lower from Printer Mechanism when replacing [Waste Ink Pads] with new one. Therefore, we clarify caution regarding assembling/disassembling of the Printer Mechanism without Housing Lower, and how to ensure of quality on repaired production this section.

[Caution regarding assembling/disassembling of the Printer Mechanism]

1) Main Frame

(a) Control of assembled standard position.

[Reason]

• The assembled accuracy of each part composed of Printer Mechanism is based on Housing Lower.

[Service treatment]

• Confirm that there is no gap between Main Frame and Housing Lower.

[Reference]

• To ensure the assembled accuracy, you have to control the assembled standard position of main frame against X/Y/Z-axis direction.

[X-axis direction]

• Make sure that main frame is correctly placed on the groove of Housing Lower.

• Make sure that there is no gap between Main Frame and Housing Lower.

[Y-axis direction]

• Make sure that main frame is correctly placed on the groove of Housing Lower.

• Make sure that there is no gap between Main Frame and Housing Lower.

[Z-axis direction]

• Align dowel of Housing Lower with positioning hole of Main Frame and ensure there is no gap.

(b) How to assemble of ASF Unit/Main Board Unit/Paper Guide Upper Unit

[Reason]

• There is a possibility that main frame deformation is caused extra force in assembling. As the result, printing failure/operation failure occurs.

[Service treatment]

• Hold the opposite side by hand while you are installing the above parts.

2) CR Guide Frame (a) Control of vertical level

[Reason]

• There is a possibility that printing failure occurs by CR Guide Frame deformation.

[Service treatment]

• Handle Front Frame in assembling/disassembling carefully.

3) Carriage Unit (a) Handling of Carriage Unit

[Reason]

• If Carriage Unit is damaged in assembling/disassembling of your repair, there is a possibility that vital problem occur in user’s further operation.

[Service treatment]

• Handle Carriage Unit in assembling/disassembling carefully.

[How to ensure of quality on re-assembled product] We judge that the quality of re-assembled product is ensured if there is no problem about the print result by adjustment program.

DISASSEMBLY/ASSEMBLY

Caution regarding Assembling/Disassembling of the Printer Mechanism, and How to Ensure of Quality on Re-assembled Product

Page 96

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

4.3 Disassembly Procedures

The flowchart below shows step-by-step disassembly procedures. When disassembling each unit, refer to the page number shown in the figure.

START

“4.4.1 Document Cover/Document Cover

Mat/ASF Cover” (p97)

“4.4.5 Panel Unit ” (p100)

“4.4.6 Housing, Upper ” (p101)

“4.4.8 Printer Mechanism ” (p104)

“4.4.11 Main Board Unit ” (p111)

“4.4.16 CR Guide Frame ” (p118)

“4.4.17 CR Motor ” (p119)

“4.4.19 Carriage Unit/CR Encoder Board/PW

Sensor Board/Head FFC” (p121)

“4.4.21 EJ Frame Unit ” (p125)

“4.4.2 Paper Support Assy. ” (p98)

“4.4.4 Scanner Unit ” (p99)

“4.5.1 Scanner Housing, Upper ” (p129)

“4.5.2 Scanner Carriage Unit ” (p130)

“4.4.7 Printhead ” (p102)

“4.4.9 PS Board Unit ” (p107)

“4.4.18 PF Motor ” (p120)

“4.4.20 Paper Guide Upper Unit ” (p124)

“4.4.3 Stacker Assy. ” (p98)

“4.5.3 Scanner Motor Unit/Scanner HP

Sensor/ Driven Pulley” (p132)

“4.4.10 Waste Ink Pads/Stacker Lock/

Rubber Feet” (p108)

“4.4.12 ASF Unit ” (p113)

“4.4.13 Holder Shaft Unit ” (p115)

“4.4.22 Ink System Unit ” (p126)

“4.4.23 Paper Guide Front Unit ” (p127)

“4.4.24 PF Roller Unit ” (p128)

 To remove the “Ink System Unit”, all parts shown in the red boxes need to be removed.

 To remove the “Paper Guide Front Unit”, all parts shown in the red boxes need to be removed.

Figure 4-1. Disassembling Flowchart

DISASSEMBLY/ASSEMBLY Disassembly Procedures 96

Page 97

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

4.4 Printer Section

4.4.1 Document Cover/Document Cover Mat/ASF Cover

Document Cover

Guide Pin

Double-sided

Tape

Guide Pin

ASF Cover

 Part/Unit that should be removed before removing Document Cover/

Document Cover Mat/ASF Cover

None

 Removal procedure

 Document Cover

1. Open the Document Cover, release the guide pins (x2, ) that secure the

Document Cover, and remove the Document Cover.

 Document Cover Mat

1. Remove the Document Cover Mat that is secured to the Document Cover with the double-sided tapes (x2).

 ASF Cover

1. Release the guide pins (x2, ) that secure the ASF Cover, and remove it from the Document Cover.

Document Cover Mat

Guide Pin

Figure 4-2. Removing Document Cover/Document Cover Mat/

ASF Cover

DISASSEMBLY/ASSEMBLY Printer Section 97

Page 98

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

4.4.2 Paper Support Assy.

 External view

Paper Support Assy.

Housing, Upper

Guide Pins

Figure 4-3. Removing Paper Support Assy.

 Part/Unit that should be removed before removing Paper Support Assy.

None

 Removal procedure

1. Release the guide pins (x2, ) that secure the Paper Support Assy, and remove the Paper Support Assy. from the Housing, Upper.

4.4.3 Stacker Assy.

 External view

Housing, Lower

Stacker Assy.

Left Side

Figure 4-4. Removing Stacker Assy.

 Part/Unit that should be removed before removing Stacker Assy.

None

 Removal procedure

1. Open the Stacker Assy.

2. Release the guide pin (x1, ) that secures the Stacker Assy. with a precision

screwdriver (-), and remove Stacker Assy.

Right Side

DISASSEMBLY/ASSEMBLY Printer Section 98

Page 99

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

4.4.4 Scanner Unit

 External view (1)

FFC Shield Plate

Rib

C.B.S. 3x6 F/Zn

Guide Pin

C.B.P. 3x10 F/Zn

(6±1kgfcm)

CN11

(7±1kgfcm)

Main Board

CN13

CN10

Scanner Unit

Main Board Unit

Step 5-2

Double-sided

Tape

C.B.P. 3x10 F/Zn

(6±1kgfcm)

FFC

USB Cover

 Part/Unit that should be removed before removing Scanner Unit

Document Cover

 Removal procedure

1. Release the tabs (x2, ) that secure the USB Cover with a precision

1 2

screwdriver (-), and remove the USB Cover.

2. Remove the screw (x1, ) that secure the FFC Shield Plate, and remove the FFC Shield Plate.

3. Disconnect the following Connector Cables and FFC from the connectors on the Main Board.

• CN10: Scanner Motor Connector Cable

• CN11: Scanner Carriage FFC

• CN13: Scanner HP Sensor Connector Cable

C A U T I O N

 Do not damage the Scanner Carriage FFC when removing/

installing the screw (

 The Scanner Carriage FFC is fastened with the double-sided

tape, so be careful not to damage the FFC when removing it.

4. Remove the screws (x2, ) that secure the Scanner Unit.

5. Open the Scanner Unit, and remove it by pulling out upward.

 Do not pinch the FFC or any Connector Cables between the

Scanner Unit and the Housing, Upper.

 Route the Scanner HP Sensor Connector Cable around the

channel of Hinge L.

Groove

Scanner HP Sensor

Connector Cable

Hinge L

Figure 4-6. Routing Connector Cable

Housing, Upper

Step 5-1

 Align the guide pin (x1, ) of the Scanner Unit and the

positioning hole (x1) of the Housing Upper.

 Insert the rib (x1) of the FFC Shield Plate into the notch (x1,

Figure 4-5. Removing Scanner Unit

DISASSEMBLY/ASSEMBLY Printer Section 99

Page 100

EPSON Stylus CX3700/CX3800/CX3805/CX3810/DX3800/DX3850 Revision A

4.4.5 Panel Unit

 External view

Panel Unit

Tab Guide Pin

Panel Board

CN1

Panel FFC

CN12

Grounding Panel

 Part/Unit that should be removed before removing Panel Unit

Document Cover

 Removal procedure

C A U T I O N

When performing the following work, be careful not to bend the tabs (x2,

) of the Panel Unit.

1. Release the tab (x1, ) that secures the Panel Cover with a precision screwdriver (-), release the rest of the tabs (x7,

) while sliding the Panel

Cover to the direction of the arrow, and remove the Panel Cover.

C H E C K

P O I N T

When removing the Panel Unit, disconnect the Panel FFC from the Main Board side (CN12).

2. Disconnect the Panel FFC from the Main Board Connector (CN12), and remove the Panel Unit.

3. Release the tabs (x2, ) that secure the Panel Board, and remove the Panel Board together with the Panel FFC and the Grounding Panel.

4. Disconnect the Panel FFC from the connector (CN1) of the Panel Board.

5. Remove the Grounding Panel from the Panel Board.

6. Remove the Button Panel from the Panel Housing.

Panel Housing

Button Panel

 When installing the Panel Board to the Panel Housing, attach

the Grounding Panel to the Panel Board, and match the guide pins (x2,

) of the Panel Housing with the positioning holes

(x2) of the Panel Board.

Figure 4-7. Removing Panel Unit

DISASSEMBLY/ASSEMBLY Printer Section 100