Epson C58, C59, ME2, C79, D78 Service manual

...

SERVICE MANUAL

Color Inkjet Printer

EPSON Stylus C58/C59/ME 2 EPSON Stylus C79/D78 EPSON Stylus C90/C91/C92/D92

SEIJ06-003

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.

Imaging Products CS, PL & Environmental Management

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 INJURY 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 VOLTAGE IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM 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.

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 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 list of Epsonapproved lubricants and adhesives required for servicing the product.

APPENDIX Provides the following additional information for reference:

• Exploded Diagram

• Circuit Diagrams

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, and WARNING messages.

W A R N I N G

C A U T I O N

C H E C K

P O I N T

A D J U S T M E N T

R E Q U I R E D

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

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.

Indicates an operating or maintenance procedure, practice or condition that is necessary to maintain the product’s quality.

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.

Revision Status

Revision Date of Issue Description

A August 7, 2006 First Release

B December 1, 2006 [Chapter 4]

• “4.3.1 Upper Housing (p36) ” Note when replacing the Base Frame is added to the reassembly procedure.

[Chapter 7]

• “7.1 Exploded Diagrams (p82) ” are updated.

C May 1, 2007 [All chapters]

• The model name; EPSON Stylus C90/C91/C92/D92 are added.

[Chapter 1]

• “1.2.3 Ink Cartridge (p13) ” is updated.

[Chapter 2]

• “2.3 Electrical Circuit Operating Principles (p22) ” is updated.

[Chapter 4]

• “4.5.6 Ink System removal (p48) ” Caution during inserting the Ink Tube into the connector is added.

• “4.5.8 EJ Frame Assy/EJ Roller (p51) ” Reassembly procedure of the Grounding Spring, Frame is added.

[Chapter 5]

• “5.2.1 Head angular adjustment (p72) ” Print samples made by the adjustment program for Stylus C90/C91/C92/D92 is added.

[Chapter 6]

• “6.1.3 Lubrication (p78) ” Lubrication point for Stylus C90/C91/C92/D92 is added.

[Chapter 7]

• “7.1 Exploded Diagrams (p82) ” Exploded Diagrams for Stylus C90/C91/C92/D92 are added.

• “7.3 Circuit Diagrams (p96) ” Circuit diagram of Stylus C90/C91/C92/D92; C683 Main is added.

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

Contents

Chapter 1 PRODUCT DESCRIPTION

1.1 Features................................................................................................................. 9

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

1.2.1 Paper Support .......................................................................................... 11

1.2.2 Printable Area Size and Margins ............................................................. 12

1.2.3 Ink Cartridge............................................................................................ 13

1.2.4 Black Ink Save Mode .............................................................................. 14

1.3 Interface.............................................................................................................. 14

1.3.1 USB Interface .......................................................................................... 14

1.4 General Specifications........................................................................................ 15

1.4.1 Electrical Specifications .......................................................................... 15

1.4.2 Acoustic Noise......................................................................................... 15

1.4.3 Safety Approvals ..................................................................................... 15

1.4.4 CE Marking ............................................................................................. 15

1.4.5 Environmental Performance .................................................................... 15

1.4.6 Durability................................................................................................. 15

1.5 Control Panel...................................................................................................... 16

1.5.1 Buttons..................................................................................................... 16

1.5.2 Indicators ................................................................................................. 16

1.5.3 Errors and Panel Status ............................................................................ 17

1.5.4 Printer Initialization ................................................................................. 17

Chapter 2 OPERATING PRINCIPLES

2.1 Overview ............................................................................................................ 19

2.2 Printer Mechanism.............................................................................................. 19

2.2.1 Printhead Specifications .......................................................................... 20

2.2.2 Carriage Mechanism................................................................................ 20

2.2.3 Paper Feeding Mechanism ...................................................................... 21

2.2.4 Ink System Mechanism ........................................................................... 22

2.3 Electrical Circuit Operating Principles............................................................... 22

2.3.1 C664 PSB/PSE Board.............................................................................. 23

2.3.2 C664/C683 Main Board .......................................................................... 23

Chapter 3 TROUBLESHOOTING

3.1 Overview ............................................................................................................ 27

3.1.1 Specified Tools........................................................................................ 27

3.1.2 Preliminary Checks ................................................................................. 27

3.2 Troubleshooting With LED Error Indications.................................................... 28

3.3 Troubleshooting for Motors and Sensors ........................................................... 29

Chapter 4 DISASSEMBLY/ASSEMBLY

4.1 Overview ............................................................................................................ 31

4.1.1 Precautions .............................................................................................. 31

4.1.2 Tools........................................................................................................ 32

4.1.3 Screws ..................................................................................................... 32

4.1.4 Work Completion Check......................................................................... 33

4.1.5 Caution After Repair ............................................................................... 33

4.1.6 Procedural Differences between the Models........................................... 34

4.2 Disassembly Procedures..................................................................................... 35

4.3 Removing Housing............................................................................................. 36

4.3.1 Upper Housing ........................................................................................ 36

4.4 Removing Board................................................................................................. 38

4.4.1 Main Board.............................................................................................. 38

4.5 Disassembling Printer Mechanism..................................................................... 40

4.5.1 Hopper..................................................................................................... 40

4.5.2 Printhead.................................................................................................. 41

4.5.3 CR Scale.................................................................................................. 44

4.5.4 CR Motor................................................................................................. 45

4.5.5 CR Unit/Timing Belt............................................................................... 46

4.5.6 Ink System removal................................................................................. 48

4.5.7 Power Supply Board................................................................................ 50

4.5.8 EJ Frame Assy/EJ Roller......................................................................... 51

4.5.9 Main Frame ............................................................................................. 53

4.5.10 LD Roller/ASF Unit .............................................................................. 56

4.5.11 Waste Ink Pads ...................................................................................... 58

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

4.5.12 PF Roller................................................................................................ 59

4.5.13 PF Motor................................................................................................ 60

4.6 Procedure Specific to Stylus C58/C59/ME 2 ..................................................... 61

4.6.1 Printhead .................................................................................................. 61

4.6.2 Waste Ink Pads ........................................................................................ 64

4.7 The Shortest Way to Remove the Main Frame. ................................................. 65

Chapter 5 ADJUSTMENT

5.1 Adjustment Items and Overview ........................................................................ 67

5.1.1 Servicing Adjustment Item List............................................................... 67

5.1.2 Replacement Part Adjustment Items ....................................................... 70

5.2 Adjustment by Using Adjustment Program ....................................................... 72

5.2.1 Head angular adjustment ......................................................................... 72

5.2.2 Top Margin Adjustment .......................................................................... 73

5.2.3 Bi-D Adjustment ..................................................................................... 73

5.2.4 First Dot Adjustment ............................................................................... 74

5.2.5 PF Band Adjustment................................................................................ 74

Chapter 6 MAINTENANCE

6.1 Overview ............................................................................................................ 76

6.1.1 Cleaning ................................................................................................... 76

6.1.2 Service Maintenance ............................................................................... 76

6.1.3 Lubrication .............................................................................................. 78

Chapter 7 APPENDIX

7.1 Exploded Diagrams ............................................................................................ 82

7.2 Parts List............................................................................................................. 95

7.3 Circuit Diagrams ................................................................................................ 96

PRODUCT DESCRIPTION

CHAPTER

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

1.1 Features

Main features of Stylus C58/C59/ME 2 and Stylus C79/D78/C90/C91/C92/D92

 High quality color printing

 Maximum print resolution: 5760 (H) x 1440 (V) dpi

 4-color printing (Yellow, Magenta, Cyan, and Black)

 Separate ink cartridges for each color

 Build-in ASF (Auto Sheet Feeder)

 Holds 80 cut sheets (24 lb, 90 g/m2)

 Holds 20 special media (EPSON Premium Glossy Photo Paper, L (3R) size)

 USB 1.1 compatible

 Windows/Macintosh supported

 Borderless printing

The difference between the Stylus C58/C59/ME 2 and Stylus C79/D78/C90/C91/ C92/D92

The main difference is the ink type as shown in the table below.

Dimension

 With the output tray and paper support closed

Width: 435 mm (17.1 inches) Depth: 219 mm (8.6 inches) Height: 165 mm (6.5 inches)

 Maximum dimension

Width: 435 mm (17.1 inches) Depth: 418 mm (16.5 inches) Height: 289 mm (11.4 inches)

 Weight

2.8 kg (6.2 lb) without ink cartridges

Stylus C79/D78/C90/C91/C92/D92

Table 1-1. Difference between the Models

Model Ink Type

Stylus C58/C59/ME 2 Dye-based ink which has a good distinction of color

Stylus C79/D78/C90/ C91/C92/D92

Pigment-based ink that provides the water, light and ozone resistant

Figure 1-1. External View

Stylus C58/C59/ME 2

PRODUCT DESCRIPTION Features 9

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

1.2 Printer Specifications

Table 1-2. Printer Specifications

Item Specification

Print method On-demand ink jet

Nozzle configuration

Print direction Bidirectional with logic seeking

Print resolution

Control code

Internal font

Input buffer size 32 Kbytes

Paper feed method Friction feed with ASF (Auto Sheet Feeder)

Paper path Sheet feeder, top entry

Paper feed rates (TBD)

Black: 90 nozzles Color: 87 nozzles (29 each cartridge: cyan, magenta, yellow)

Horizontal x Vertical (dpi)

• 360 x 120 • 720 x 720

• 360 x 360 • 1440 x 720

• 360 x 720 • 5760 x 1440

• ESC/P2 expanded raster graphics code

• EPSON Remote command

Character code: ASCII 20H to 7FH Font: Bit map LQ font

EPSON Courier

• High quality mode, 10.16-mm (0.4") feed TBD mm/sec (TBD inch/sec)

• High speed mode, continuous feed TBD mm/sec (TBD inch/sec)

PRINT SPEED & PRINTABLE WIDTH

Table 1-3. Character Mode

Character Pitch Printable Columns CR Speed

10 CPI (Pica) 80 419 mm/s (165 CPS*)

Note * : CPS: Characters per second

Table 1-4. Graphics Mode

Horizontal Resolution

360 dpi

720 dpi

1440 dpi

5760 dpi

Printable

Area

209.8 mm (8.26")

Max. Dot

Count

2976

5952

11904

23808 VSD3 VSD3

Stylus C58/

C59/ME 2

Eco Eco

VSD1 VSD1

VSD2 VSD2

VSD3 ---

VSD3 VSD3

Dot Size

Stylus C79/

D78/C90/C91/

C92/D92

--- VSD2’ (Color)

--- VSD2’ (Black)

--- VSD3’ (Color)

--- VSD3’ (Black)

Speed

723.9 mm/s (360 CP)S

419.1 mm/x (165 CPS)

609.6 mm/s (240 CPS)

PRODUCT DESCRIPTION Printer Specifications 10

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

1.2.1 Paper Support

Following table shows the paper type and sizes supported by the printer. Supported paper type and sizes vary depending on the markets.

Table 1-5. Paper Support

Thickness

(mm)

0.08-0.11

N/A

0.11

0.13

0.27

0.23

Item Paper Size

Plain paper

Recycled paper

Envelope (Bond paper, Air mail, PPC)

Premium Ink Jet Plain Paper

Bright White Ink Jet Paper

Premium Photo Paper Glossy (EAI)

Premium Glossy Photo Paper (Other)

EPSON special paper

Premium Photo Paper Semi-Gloss (EAI) Premium Semigloss Photo Paper (Other)

Premium Presentation Paper Matte (EAI) Matte Paper-Heavyweight (Other)

Letter

Legal

Half Letter

User defined

No.10

Letter

8" x 10"

5" x 7"

4" x 7.11"

4" x 6"

L (3R)

Letter

4" x 6"

Letter

Weight

64-90 g/m

(17-24 lb.)

45-75g/m

(12-20 lb.)

80 g/m2 (21 lb.)

92.5 g/m2 (25 lb.)

255 g/m2 (68 lb.)

250 g/m2 (66 lb.)A4

167 g/m2 (44 lb.)

Table 1-5. Paper Support

Thickness

(mm)

0.25

0.30

Weight

258 g/m2 (68 lb.)

290 g/m2 (77 lb.)

Item Paper Size

Letter

Photo Paper Glossy (EAI) Glossy Photo Paper (EUR, Asia)

5" x 7"

4" x 6"

Letter

Ultra Premium Photo Paper Glossy (EAI) Ultra Glossy Photo Paper (Other)

EPSON special paper

8" x 10"

5" x 7"

4" x 6"

L (3R)

Note 1: For paper width and length, see Table 1-6, “Paper Width and Length,” on page 12.

Note *1: Borderless printing supported.

C A U T I O N

 Make sure that the paper is not wrinkled, fluffed, torn, or folded.  The curve of paper must be 5 mm or below.  When printing onto an envelope, be sure that the flap is on the

long edge and is folded.

 Do not use the adhesive envelopes.  Do not use double envelopes and cellophane window envelopes.

PRODUCT DESCRIPTION Printer Specifications 11

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

PAPER WIDTH AND LENGTH

Table 1-6. Paper Width and Length

Paper Size Width Length

A4 210 mm (8.3") 297 mm (11.7")

A5 148 mm (5.8") 210 mm (8.3")

A6 148 mm (5.8") 210 mm (8.3")

B5 182 mm (7.2") 257 mm (10.1")

Letter 215.9 mm (8.5") 279.4 mm (11")

Legal 215.9 mm (8.5") 355.6 mm (14")

Half Letter 139.7 mm (5.5") 215.9 mm (8.5")

Cut sheet

Envelope

8" x 10"

5" x 7"

4" x 7.11"

4" x 6"

L (3R)

User defined

No.10 104.8 mm (4.125") 241.3 mm (9.5")

DL 110 mm 220 mm

C6 114 mm 162 mm

203.2 mm 254 mm

127 mm 178 mm

101.6 mm 180.6 mm

101.6 mm 152.4 mm

89 mm (3.5") 127 mm (5")

50.8-329 mm (2-12.6")

127-1117.6 mm

(5-44")

1.2.2 Printable Area Size and Margins

Refer to the table and figure below for the printable area size and margins.

Table 1-7. Guaranteed Print Area

A B-L B-R C D

Minimum margin

3 mm

(0.12")

Cut sheet

3 mm

(0.12")

B-R

3 mm

(0.12")

R-BL-B

12.5 mm (0.12")

Borderless printing

20 mm (0.12")

Envelope

B-L

Note * : Borderless printing is carried out by enlarging the image size wider than the paper size as

shown in the figure. The image width protruding from the paper size is shown below.

Table 1-8. Borderless Printing

Paper Size Top Bottom Left/Right

A4, Letter, 8" x 10", 5" x 7", 4" x 7.11"

4" x 6", L (3R) 2.82 mm (0.11") 3.60 mm (0.14") 2.54 mm (0.1")

PRODUCT DESCRIPTION Printer Specifications 12

2.96 mm (0.12") 4.02 mm (0.16") 2.54 mm (0.1")

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

1.2.3 Ink Cartridge

 Type/color: EPSON-brand special ink cartridges

Table 1-9. Stylus C58/C59/ME 2

Color ECC Pacific, Asia (Other)

Black T0761 T0751

Cyan T0762 T0752

Magenta T0763 T0753

Yellow T0764 T0754

Table 1-10. Stylus C79/D78

Color Latin, Asia, Pacific Europe

Black T0731 T0711

Cyan T0732 T0712

Magenta T0733 T0713

Yellow T0734 T0714

Table 1-11. Stylus C90/C91/C92/D92

Color Latin Asia Europe CISMEA

Black

Cyan T0732

Magenta T0733

Yellow T0734

T0731

T0901

T0731

T0911*

T0732

T0912*

T0733

T0913*

T0734

T0914*

T0711 T0921

T0712 T0922

T0713 T0923

T0714 T0924

 Print Capacity (TBD)

 Stylus C58/C59/ME 2

Black Ink Cartridge: TBD pages/A4

(ISO/IEC10561 Letter Pattern at 360 x 720 dpi) TBD pages/A4 (360x720 dpi, 5% duty)

Color Ink Cartridge: TBD pages/A4 (360 x 720 dpi, 5% duty for each color)

 Stylus C79/D78/C90/C91/C92/D92

Black Ink Cartridge: TBD pages/A4

(ISO/IEC10561 Letter Pattern at 360 x 720 dpi) TBD pages/A4 (360x720 dpi, 5% duty)

Color Ink Cartridge: TBD pages/A4 (360 x 720 dpi, 5% duty for each color)

 Shelf life: Two years from production date (if unopened), six months after

opening package.

 Storage Temperature

Table 1-12. Storage Temperature

Situation Storage Temperature Limit

When stored in individual boxes

When installed in main unit

-30 oC to 40 oC

F to 104oF)

(-22

-20 oC to 40 oC

(-4oF to 104oF)

1 month max. at 40 oC (104oF)

 Dimension

 Stylus C58/C59/ME 2

12.7 mm (W) x 43 mm (D) x 47 mm (H)

 Stylus C79/D78/C90/C91/C92/D92

Note * : Except EHK.

12.7 mm (W) x 68 mm (D) x 47 mm (H)

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 at -16 °C (3.2 oF). Ink thaws

and is usable after approximately three hours at 25 °C (77

F).

PRODUCT DESCRIPTION Printer Specifications 13

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

1.2.4 Black Ink Save Mode

Black ink save mode allows you to print images with color ink only when the remain-

ing amount of black ink is low. This mode can be selected when the remaining

amount of color ink is sufficient since black areas of the images are printed with a

mixture of other colors.

 Supported OS: Windows 98, ME, 2000, XP, XP x64

 Printing mode: Plain Paper & Text Mode (360 dpi)

 Operating procedure

1. User carries out printing from an application.

2. The printer driver checks both the printing mode and the amount of remaining ink, and displays the specific window if the conditions described below are all met.

• Selected printing mode supports black ink save mode.

• Remaining amount of black ink is less than 5%, or the status of the black ink is “ink low”.

• Remaining amount of all the color ink is more than 10%, or the status of all the color ink is NOT “ink low”.

Starts printing in black ink save mode.

Starts printing in a normal manner.

Starts printing in a normal manner. This window will not be displayed again until the black ink cartridge is replaced.

Flowchart 1-1. Black Ink Save Mode

1.3 Interface

Stylus C58/C59/ME 2 and Stylus C79/D78/C90/C91/C92/D92 provide an USB interface.

1.3.1 USB Interface

 Standard: Based on Universal Serial Bus Specifications Revision 1.1,

Universal Serial Bus Device Class Definition for Printing Devices Version 1.1

 Descriptors: Based on Design Specification for USB Device Requests and

USB Descriptors for EPSON USB Printer

 Product ID: 0005h

 Transfer rate: 12 Mbps (Full Speed Device)

 Cable length: Under 2 meters (6.6 feet)

 Device ID

Table 1-13. Device ID

Product

Name

Stylus C58

Stylus C59

ME 2

Device ID

<00H><4BH> MFG:EPSON; CMD:ESCPL2,BDC; MDL:Stylus C58 CLS:PRINTER; DES:EPSON<SP>Stylus C58;

<00H><4BH> MFG:EPSON; CMD:ESCPL2,BDC; MDL:Stylus C59 CLS:PRINTER; DES:EPSON<SP>Stylus C59;

<00H><3FH> MFG:EPSON; CMD:ESCPL2,BDC; MDL:ME 2 CLS:PRINTER; DES:EPSON<SP>ME 2;

Product

Name

Stylus C79

Stylus D78

Device ID

<00H><4BH> MFG:EPSON; CMD:ESCPL2,BDC; MDL:Stylus C79 CLS:PRINTER; DES:EPSON<SP>Stylus C79;

<00H><4BH> MFG:EPSON; CMD:ESCPL2,BDC; MDL:Stylus D78 CLS:PRINTER; DES:EPSON<SP>Stylus D78;

Note : Device IDs shown in the table above are for when IEEE1284.4 is invalid.

When IEEE1284.4 is valid, the line that starts with “CMD” changes to “CMD:ESCPL2,BDC,D4,D4PX”.

PRODUCT DESCRIPTION Interface 14

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

1.4 General Specifications

1.4.1 Electrical Specifications

 Primary power input

Table 1-14. Primary power input

100-120 V model 220-240 V model

Rated power supply voltage (ACV) 100 to 120 220 to 240

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

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

Rated frequency (Hz) 50 to 60

Input frequency range (Hz) 49.5 to 60.5

11 (ISO10561 Letter Pattern)

Power consumption (W)

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

2: If the printer is not operated for more than five minutes, the standby function reduces

the current to the motor to conserve power.

 Dielectric strength

 AC1000 Vrms for 1 min. or AC1200 Vrms for 1 sec. (100-120V version)

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

1.4.2 Acoustic Noise

 Noise level: Approx. 44 dB (according to ISO7779)

2.5 (Sleep mode) 3.0 (Sleep mode)

0.2 (Power off mode) 0.4 (Power off mode)

1.4.4 CE Marking

 220-240V version

 Low voltage directive 73/23/EEC: EN60950

 EMC directive 89/336/EEC: EN5502 Class B, EN61000-3-2,

EN61000-3-3, EN55024

1.4.5 Environmental Performance

Table 1-16. Environmental Performance

Condition Temperature Humidity*

Operating

Not operating*

Note *1: After opening package

*2: No condensation

*3: One month at 40°C (104°F), 120 hours at 60°C (140°F)

*4: Under the following conditions:

Humidity (%)

10 to 35°C

(50 to 95°F)*3*

-20 to 60°C

(-4°F to 140°F)

20 to 80%*

5 to 85%

1 x 10-3 seconds

2 x 10-3 seconds

Impact Vibration

1G,

2G,

0.15G

0.50G

1.4.3 Safety Approvals

Table 1-15. Safety Approvals

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

CSA C108.8 Class B AS/NZS CISPR22 class B

EN 60950

1.4.6 Durability

 Total print life:10,000 pages (A4, Letter) or five years (whichever comes first)



Printhead life: Seven billion shots (per nozzle) or five years (whichever comes first)

27/80

10/50

30/86 35/95 40/10420/68

Temperature (°C/°F)

PRODUCT DESCRIPTION General Specifications 15

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

1.5 Control Panel

1.5.1 Buttons

The control panel contains following two buttons (non-lock type), which are used to set and execute some operations. The functions of each button are described in the table below.

Table 1-17. Operations

Button Function

Power Turns on or off this unit.

 When Paper out occurred

 Loads paper.

 When Paper jam occurred

 Ejects paper.

 When Double feed occurred

 Clears the error and resumes the printing.

 When Ink end or No ink cartridge occurred

Maintenance

Power + Maintenance

 Moves the carriage to ink-check position.

 When the carriage is in the ink-check position

 Moves the carriage slightly to check the adjacent ink cartridge.

 When the carriage is in “Ink low” or “Ink out” position

 Moves the carriage to the replacement position.

 During printing

 Cancels the current print job.

 When pressed for three seconds

 Cleans the printhead.

 When the printer is turning on

 Print a nozzle check pattern.

 When the printer is on

 Shuts down the printer.

1.5.2 Indicators

The control panel contains following two LED to indicate some status.

Table 1-18. Indicators

LED Function

Power [Green] Lights while the printer is turned on.

Lights: Paper out, Paper jam, Double feed, No ink cartridge,

Maintenance [Red]

Flashes: Ink low

Power Button

Ink end, Incorrect ink cartridge

Maintenance Button

Power LED

Maintenance LED

Figure 1-2. Control Panel

Note * : Hold down [Maintenance] first and press [Power]. Keep the buttons pressed for over

seven seconds.

PRODUCT DESCRIPTION Control Panel 16

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

1.5.3 Errors and Panel Status

Followings are the errors that occur on the printer:

 Fatal error: Carriage control error.

 Maintenance request: Waste ink pads need to be replaced.

 Ink end: Ink has run out.

 No ink cartridge: Ink cartridge(s) is not installed.

 Incorrect ink cartridge: Non-genuine ink cartridge(s) is installed.

 Paper jam: Paper remains in the paper path.

 Paper out: Failed to load papers.



Double feed: Two or more papers have been fed during duplex printing.

 Ink low (warning): Ink is running low.

Table 1-19. Errors and Panel Status

Printer Status

Power LED Maintenance LED

Turning the power off Flashes fast Off 1

Fatal error Off Flashes fast 2

Maintenance request Flashes alternately 3

Paper jam --- On 4

Paper out --- On 4

Double feed --- On 4

Ink cartridge replacement Flashes --- 5

Ink sequence Flashes --- 6

Incorrect ink cartridge --- On 7

No ink cartridge/Ink end --- On 7

Data processing Flashes --- 8

Ink low --- Flashes 9

Indicators

Priority

1.5.4 Printer Initialization

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

Turning the power on On --- 10

Note 1: “---”: no change

2: When multiple errors occur at the same time, the one with higher priority will be indicated.

PRODUCT DESCRIPTION Control Panel 17

OPERATING PRINCIPLES

CHAPTER

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

2.1 Overview

This section describes the operating principles of the printer mechanism and electrical circuit boards. The printer mechanism does not differ between the Stylus C58/C59/ ME2 and Stylus C79/D78/C90/C91/C92/D92.

PF motor

PF roller

2.2 Printer Mechanism

Printer mechanism of Stylus C58/C59/ME 2 and Stylus C79/D78/C90/C91/C92/D92 consists of printhead, carriage mechanism, paper loading/feeding mechanism, and ink system. As in the case of conventional models, Stylus C58/C59/ME 2 and Stylus C79/D78/ C90/C91/C92/D92 has two motors; one is a stepping motor for paper loading/feeding mechanism, and the other is a DC motor for carriage mechanism. Papers are fed from the backside and ejected from the front side of the printer. Paper feeding mechanism feeds papers using the LD roller and the retard roller.

Star wheel

rollers

Carriage unit

Paper eject

roller

CR lock lever

Cap unit

CR timing belt

CR encoder sensor

Retard roller

Compression spring

LD roller

PE sensor

Cam, large Cam, small

Clutch

Pump unit

CR motor

Figure 2-1. Printer Mechanism Outline

OPERATING PRINCIPLES Overview 19

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

2.2.1 Printhead Specifications

The Printhead of this product is a D2-CHIPS type.

 Nozzle configuration

 Monochrome 90 nozzles

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

The following shows the arrangement of the nozzles and the color arrangement of each nozzle line when viewed the printhead from behind.

2.822mm

(40/360 inch)

C#29

Cyan: 29nozzles

C#1

M#29

Magenta: 29nozzles

K#90

K#89

Paper Loading

Black

Color

Direction

2.2.2 Carriage Mechanism

Main components of the carriage mechanism are carriage unit (including printhead, CR encoder sensor), CR motor, timing belt, and CR scale.

2.2.2.1 CR Motor Specifications

Table 2-1. CR Motor Specifications

Item Specification

Type Motor with DC brush

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

Electric resistance 28.8 Ω ± 10%

Inductance 20.1 mH ± 25%

Drive method PWM, constant-current chopping

Drive IC A6628

M#1

Y#29

Yellow: 29nozzles

Y#3 Y#2

Y#1

Carriage Moving Direction

K#3

K#2

K#1

0.2117mm

(1/120 inch)

Figure 2-2. Nozzle Rear View

OPERATING PRINCIPLES Printer Mechanism 20

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

2.2.3 Paper Feeding Mechanism

Paper loading/feeding mechanism consist of CR lock lever inside the ink system, LD roller shaft (including clutch mechanism), and ASF unit.

CR lock lever and clutch mechanism play an important role in paper loading mechanism. Refer to 2.2.3.2 Drive Process (p21) for details.

2.2.3.1 PF Motor Specifications (For both ASF and Pump motor)

Table 2-2. PF Motor Specification

Item Specification

Type 4-phase, 48-pole PM stepping motor

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

Wire wound

resistance

Inductance 5.5 mH ± 20% (1KH, 1Vrms)

Drive method

Drive IC A6628

2-2 phase, 1-2 phase, W1-2phase, 2W1-2phase, 4W1-2 phase

4.3 Ω +8 / -12% (per one phase at 20 °C)

Bipolar drive

constant-current drive

2.2.3.2 Drive Process

1. Drive of the PF motor is always transmitted to the paper eject roller and the PF roller, however, it is not transmitted to the LD roller and the retard roller owing to the clutch of the LD roller shaft.

2. The carriage unit moves to the ASF trigger position once the paper loading command is received.

3. PF motor is rotated counter clockwise, and the clutch is released by the CR lock lever.

4. After the clutch is released, the PF motor rotates clockwise. Drive is transmitted to the LD roller and the paper loading operation begins.

5. During paper loading operation, papers are fed from the ASF unit to inside the printer by the rotating movement of the two cams of the LD roller.

 Cam, large:releases hopper

 Cam, small:releases paper back lever

6. Once a sheet of paper is fed, the hopper and the paper back lever bring back rest of the papers to the position in readiness by the rotating movement of the two cams mentioned above.

7. When the LD roller is turned a full circle, the CR lock lever release the clutch and the drive to the LD roller is interfered.

OPERATING PRINCIPLES Printer Mechanism 21

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

2.2.4 Ink System Mechanism

The Ink system mechanism consists of pump mechanism and capping mechanism that includes wiper mechanism.

2.2.4.1 Pump Unit Mechanism

When the PF motor turns, power is always transmitted to the ink system.

Table 2-3. PF Motor Rotational Direction & Ink System Mechanism

Direction* Function

Counterclockwise Absorbs the ink by the Pump Unit

Clockwise Release pump.

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

2.2.4.2 Capping Mechanism

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

2.3 Electrical Circuit Operating Principles

The electric circuit of Stylus C58/C59/ME 2 and Stylus C79/D78/C90/C91/C92/D92 consists of the following boards:

 Main board: C664 Main Board (Stylus C58/C59/ME 2/C79/D78)

C683Main Board (Stylus C90/C91/C92/D92)

 CSIC Board: C654 Head Board (Stylus C58/C59/ME 2/C79/D78)

CR contact Module (Stylus C90/C91/C92/D92)

 Power supply board: C664 PSB/PSE Boards

Below is a block diagram of C664 Main Board, C664 PSB/PSE Boards, and C654 Head Board.

Printer Mechanism

CR Motor

PF Motor

C664/C683 Main Board

Printhead

Sensors

CSIC Board/ C654 Head Board/ CR contact Module*

+42V

C664PSB/PSE Board

Note * : Varies depending on the model.

Stylus C58/C59/ME 2: CSIC Board Stylus C79/D78 C654 Head Board Stylus C90/C91/C92/D92: CR contact Module

PowerOFF

Figure 2-3. Electrical Circuit Block Diagram

OPERATING PRINCIPLES Electrical Circuit Operating Principles 22

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

2.3.1 C664 PSB/PSE Board

In the PSB/PSE Boards of Stylus C58/C59/ME 2 and Stylus C79/D78/C90/C91/C92/ D92, the simulated oscillating stimulation flyback converter circuit method is used, and it supplies +42 VDC to the drive line. The application of the output voltage is described below.

 C664PSB Board:100-120V

 C664PSE Board:220-240V

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 led to the switching circuit and FET QF1 preforms the switching operation. By the switching operation of the primary circuit, +42VDC is generated and stabilized at the secondary circuit.

2.3.2 C664/C683 Main Board

The following lists the components of the logic circuit on C664/C683 Main Board.

 Logic line (CPU-ASIC 4 in 1, Flash-ROM and so on)

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

 Head control/drive circuit

 USB I/F circuit

 Sensor circuit

 Reset circuit, EEPROM circuit

Table 2-4. C664/C683 Main Board Major Components and Primary Functions

IC Location Function

FLASH ROM IC3 3.3 V drive 4 M bit flash ROM that stores the program.

Reset Regulator IC1 3.3V/1.5V generate regulator, 2 ch reset circuit

EEPROM IC4 Makes back up of default setting values and parameters

Motor Driver IC6

Head Driver IC7 Generates trapezoidal waveform, drives 5 V

ASIC IC10

Drives CR/PF motors, controls PWM by the program timer, adjusts 5 V, drives 42 V

Drives CPU (H8S/2674 base), internal 8 K byte x 4 RAM, 24 Mhz, 3.3 V/1.5V

OPERATING PRINCIPLES Electrical Circuit Operating Principles 23

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

Figure 2-4. C664 Main Board Block Diagram (Stylus C58/C59/ME 2)

OPERATING PRINCIPLES Electrical Circuit Operating Principles 24

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

Figure 2-5. C664/C683 Main Board Block Diagram (Stylus C79/D78/C90/C91/C92/D92)

OPERATING PRINCIPLES Electrical Circuit Operating Principles 25

TROUBLESHOOTING

CHAPTER

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

3.1 Overview

This chapter describes how to solve problems.

W A R N I N G

C H E C K

P O I N T

 Be careful to avoid electric shocks when checking the electrical

circuit boards (C664 MAIN, PSE and B circuit boards) while the power is turned on.

 Touching an FET, transistor or heat sink with one hand while

touching a metal part of the mechanism with the other hand could result in an electric shock, so carefully avoid this.

 After initial filling of ink has been repeated several times,

immediate moving or tilting of the printer could result in leaking of ink that has not been completely absorbed by the Waste Ink Pad. When initial filling of ink has been repeated several times, check the ink remaining in the tip of the Waste Ink Tube and the waste ink not absorbed by the Waste Ink Pad before moving the printer.

 Disassembly and reassembly of parts is often required when

identifying the causes of problems. The parts should be disassembled and re-assembled correctly while referring to

DISASSEMBLY/ASSEMBLY (p30) so that the operation and

status of each check item can be correctly verified.

 Some individual part and units may require adjustment once

they are removed or replaced. If removing or replacing parts which have specific instructions for adjustment included in

DISASSEMBLY/ASSEMBLY (p30), be sure to make these

adjustments after repairing the problem location.

3.1.2 Preliminary Checks

Before starting troubleshooting, be sure to verify that the following conditions are all met:

 The power supply voltage must be within the specification limits.

(Measure the voltage at the electrical outlet.)

 The power cable must be free from damage, short circuit, or breakage, and must

not be miswired.

 The printer must be grounded properly.

 The printer should not be located in a place where it can be exposed to too high or

low temperature, too high or low humidity, or abrupt temperature change.

 The printer should not be located near waterworks, near humidifiers, near heaters

or near flames, in a dusty atmosphere or in a place where the printer can be exposed to blast from an air conditioner.

 The printer should not be located in a place where volatile or inflammable gases

are present.

 The printer should not be located in a place where it can be exposed to direct

sunlight.

 The printer must be located in a well-ventilated place.

 The printer must be placed on a strong and steady level table (without an

inclination larger than five degrees).

 Be sure to use papers that conform to the specifications.

 There should be no errors in handling of the printer.

 Check the inside of the printer, and remove foreign matters if any, such as paper

clips, staples, bits of paper, paper dust or toner.

 Clean the inside of the printer and the rubber rollers.

3.1.1 Specified Tools

This printer does not require any specified tools for troubleshooting.

TROUBLESHOOTING Overview 27

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

3.2 Troubleshooting With LED Error Indications

LED error display, cause, and remedy are explained here.

Table 3-1. Troubleshooting With LED Error Indications

Error

Ink end/ No ink cartridge/ Incorrect ink cartridge

Paper Out --- On

Double feed error --- On

Paper jam --- On

Maintenance request (Waste ink overflow)

Fatal error Off Flashes fast

LED status

Power Maintenance

--- On

Flashes alternately

Cause Remedy

• Ink inside Bk, Y, M, C cartridges has run out.

• Ink cartridge(s) is not installed.

• Non-genuine ink cartridge(s) is installed.

• Paper loading operation is executed when there is no paper.

• Papers stopped before the PE Sensor or could not be fed.

• Papers are fed without being placed against the right edge guide.

• Connector of the PE sensor is disconnected.

• When performing duplex printing, blank paper is ejected.

• The printer detected that the paper is too long upon ejection.

Even though paper feeding operation is carried out for predetermined times, leading edge or back-end of the paper could not be detected.

As a result of cleaning and flushing, total emission of ink has exceeded the specific level.

• Home position of the carriage could not be detected.

• Abnormal external pressure is applied to the printer when the power is on.

• Carriage movement is interfered during printing.

• Check the ink cartridge(s) and reinstall it correctly.

• Replace the ink cartridge(s) with a genuine one.

1. If there is no paper on the paper tray, load papers.

2. If the paper has stopped halfway, remove the paper, check if the paper is not bent, fan the paper, and load it against the edge guide.

3. Press the [Maintenance] button to release the error.

1. Remove the blank paper, or check the paper size.

2. Press the [Maintenance] button to eject the paper and release the error.

1. Press the [Maintenance] button on the panel.

2. If paper jam occurred again after pressing the button, open the printer cover and remove all the papers inside the printer and

papers set on the hopper.

3. Making sure there is no paper inside the printer, load paper on the hopper and press [Maintenance].

Replace the waste ink pad, and reset the waste ink counter using the adjustment program. Refer to Chapter 5 “ADJUSTMENT” (p.66) for details.

1. Turn the power off, wait for a few seconds, and turn the power

back on again.

2. If the fatal error still appears, turn the power off, remove the papers on the hopper, and check the following:

• Open the printer cover, check the ink cartridges, and reinstall them correctly.

• Check is there is no foreign material or papers inside the printer. If there is any, remove them.

3. Turn the printer power on.

Note : “---”: no change.

TROUBLESHOOTING Troubleshooting With LED Error Indications 28

EPSON Stylus C58/C59/ME 2 Stylus C79/D78/C90/C91/C92/D92 Revision C

3.3 Troubleshooting for Motors and Sensors

 Motor

Table 3-2. Motor Resistance and Check Points

Motor name Type Location Check point Resistance

CR motor Motor with DC brush CN5 Pin 1 & 2 28.8 Ω ± 10%

PF motor 4-phase, 200-pole HB stepping motor CN6

Pin 1 & 3 Pin 2 & 4

 Sensor

Table 3-3. Sensor Check

Sensor name Detecting system Location Signal level Sensor status

PE sensor Transmission photo interrupter CN7 pin 1 & 2

2.6 V or more Paper loaded

0.4 V or less No paper

4.3 Ω ± 8%/-

ºC)

12%(20

TROUBLESHOOTING Troubleshooting for Motors and Sensors 29

DISASSEMBLY/ASSEMBLY

CHAPTER1

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