Epson Stylus Scan 2000 Service Manual

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Page 1

SERVICE MANUAL

All-in-one printer, scanner, and copier

EPSON STYLUS Scan 2000

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EPSON STYLUS Scan 2000 Revision B

Notice:

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All rights reserved. No part of this manual may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION.

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

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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.

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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.

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EPSON STYLUS Scan 2000 Revision A

CAUTION

PRECAUTIONS

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

W ARNING

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

DANGER

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

2. NOWORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK.

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

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 A S 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 MADE BY THE MANUFACTURER; INTRODUCTION OF SECOND-SOURCE ICs OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY APPLICABLE EPSON WARRANTY.

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EPSON STYLUS Scan 2000 Revision A

PREFACE

This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPSON STYLUS Scan 2000. The instructions and procedures

CHAPTER 1. “Product Description”

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”

Provides step-by-step procedures for troubleshooting.

CHAPTER 4. “Disassembly & Assembly”

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

CHAPTER 5. “Adjustment”

Provides Epson-approved methods for adjustment.

included herein are intended for the experie nced repair technicians, and attention should be given to the precautions on the preceding page. The chapters are organized as follows:

CHAPTER 6. “Maintenance”

Provides preventive maintenance procedures and the lists of Epson-approved lubricants and adhesives required for servicing the product.

CHAPTER 7. “Appendix”

Provides the following additional information for reference:

• EEPROM Address Map

• Connector Pin Assignment

• Schematics

• Circuit Diagrams

Page 5

EPSON STYLUS Scan 2000 Revision A

Revision Status

Revision Issued Date Description

Revision A October 4, 1999 Full version

Revision B October 20, 1999

Changed Disassembly and Troubleshooting to account for ASP blue protective tape, also fixed scanner removal description

Page 6

EPSON Stylus Scan 2000 Revision A

Product Description

Features............................................................. ....... ...... ....... ...... .................. 9

General Specifications ............................................................................... 10

Local copy.............................................................................................. 10

Scan area................................................................................................ 10

Print area................................................................................................ 11

Printer..................................................................................................... 12

Scanner .................................................................................................. 15

Common................................................................................................. 16

Interfaces..................................................................................................... 17

Printer interface ..................................................................................... 17

Scanner interfaces................................................................................. 22

Control Panel............................................................................................... 23

Buttons................................................................................................... 23

Control panel indicates the printer’s condition................................... 25

Initialization............................................................................................ 26

Stylus Scan Errors ...................................................................................... 28

Physical Characteristics.............................................................................. 29

Dimensions............................................................................................ 29

Weight.................................................................................................... 29

External view ......................................................................................... 29

Operating Principles

General........................................................................................................ 31

Printer Mechanism Operation ................................................................... 32

Printing Mechanism.............................................................................. 33

Printing Process..................................................................................... 34

Carriage Mechanism ............................................................................. 35

Paper Feeding Mechanism ................................................................... 37

Ink System ............................................................................................. 42

Pump, Carriage Lock, Head Cleaner Mechanism................................ 43

Scanner Mechanism Operation................................................................. 46

Mechanism ............................................................................................ 46

Local and PC-Centric Copy Principles....................................................... 47

Local copy process................................................................................ 47

PC-Centric copy process....................................................................... 47

Electrical Circuit Operating Principles ...................................................... 49

B101 PSB/PSE Board............................................................................. 50

B101 MAIN Board.................................................................................. 53

Troubleshooting

Unit Level Troubleshooting....................................................................... 57

Printer/Scanner does not operate at power on................................... 58

Error is detected .................................................................................... 59

Failure occurs during printing.............................................................. 59

Printer does not feed paper correctly.................................................. 60

Control panel operation is abnormal................................................... 60

Repair of the Printer Mechanism .............................................................. 61

Troubleshooting the Scanner.................................................................... 65

Scanner Troubleshooting Flowcharts.................................................. 65

Scanner troubleshooting check points................................................ 66

Troubleshooting the Motors and Sensors ............................................... 69

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EPSON Stylus Scan 2000 Revision A

Disassembly & Assembly

Overview ..................................................................................................... 71

Precautions for Disassembling the Printer.......................................... 71

Tools....................................................................................................... 72

Screw Numbering System and Specifications ................................... 73

Service Checks After Repair ................................................................. 74

Disassembly Procedures............................................................................ 76

Removing the Housing ................................................... ...... ................ 77

Removal of printer consumables......................................................... 81

Removing the Circuit Board Tray............... ....... ...... ....... ...... ....... ...... ... 84

Removing the Scanner Mechanism..... ...... ....... ...... ....... ...... ................ 88

Disassembling the Printer Mechanism................................................ 94

Adjustment

Required Adjustments.............................................................................. 108

Adjustment Tools Required................................................................ 110

Printer Adjustment ................................................................................... 110

Printer hardware adjustments............................................................ 111

Using the Service-Adjustment Program................................................. 113

Installing the program......................................................................... 113

Opening the Start-up menu................................................................ 114

Initial Ink Charge Operation................................................................ 119

Bi-D Adjustment .... ...... ...... ....... ....................................... ...... ....... ...... . 120

Head Cleaning Operation.................................................................... 121

Head Voltage ID Input................................. ....... ...... ....... ...... ....... ...... . 122

Head Angular Adjustment .................................................................. 123

Ink draining..................................... ....................................... ....... ...... . 125

Scanner Adjustment................................................................................. 125

Maintenance

Printer-Related Maintenance................................................................... 127

Cleaning .................................................................................................... 128

Exterior................................................................................................. 128

Inside.................................................................................................... 128

Lubrication ................................................................................................ 129

Printer Mechanism .............................................................................. 129

Appendix

Connector Summary................................................................................ 138

Board Connector Summary................................................................ 139

Connector Pin Assignment................................................................. 140

EEPROM Address Map............................................................................. 143

Exploded Diagrams.................................................................................. 148

Parts List.................................................................................................... 155

Component Layout................................................................................... 160

Circuit Diagrams.................................... ...... ....... ...... ....... ...... ....... ...... ...... 165

Page 8

PRODUCT DESCRIPTION

CHAPTER

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EPSON Stylus Scan 2000 Revision A

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1.1 Features

The major features of the EPSON Stylus Scan 2000 are:

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High Color Print Quality

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1440 (H) X 720 (V) dpi printing

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Four Color Printing (CMYK)

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Traditional and New Microweave

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Sheet-fed 300dpi scanning

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High quality local copy One color copy mode Text & Graphics Two B&W copy modes Black & White, Grayscale

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High speed local copy Color normal mode copy Max. 1.2 PPM Gray mode copy Max. 1.3 PPM B/W normal mode copy Max. 3.0 PPM

Two Built-in Interfaces

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Bi-directional parallel I/F (IEEE-1284 level 1 device)

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USB

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Windows/Macintosh exclusive

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Copy settings from the computer Auto Photo Fine Auto Enlarge Auto Layout Background reduction

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Installed functions are the same or equivalent to the EPSON Stylus Color 740 and the GT-2200.

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Small footprint 228 x 437 x 279 mm (HWD)

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Local copy settings from the control panel Enlargement 141% Reduction 93%, 70% Copy size protection Letter/Half Letter/5 x 8”/Legal

A4/B5/A6

(Copy size protection prevents the printhead from firing ink onto the platen in cases where the loaded paper size does not match the paper size selected in the software.)

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Built-in Auto Sheet Feeder

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Holds 100 cut-sheets (64g/m2)

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Holds 10 envelopes

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Holds 30 transparency films

Product Description Features 9

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EPSON Stylus Scan 2000 Revision A

1.2 General Specifications

1.2.1 Local copy

1. Local copy

Table 1-1. Local Copy Specifications

Mode

B/W 300x300 Line art 360x360 Off No Bi-D Normal

B/W

Grayscale 300x300 Gray 360x360 On No Bi-D Normal Text &

Color

Graphics

Output mode = data from the scanner ASIC to the printer

Scan

res.

300x300

2. Enlargement: Default 100% Enlargement 141% Reduction 70%, 93% (not continuous)

3. Copy size Max. copy size 216 x 355.6mm (8.5 x 14inches)

Copy size protection A4/B5/A6 (A-size version)

Output

mode

Full

color

res.

360x360 On No Bi-D Normal

Micro

Weave

Variable

dot

Head

seq.

Media

(Top, bottom, and both sides need 3mm margins)

Letter/Half Letter/5 x 8”/Legal (Letter size version)

1.2.2 Scan area

Starting scan

position (1st bit)

Scanning Area

Document

edge (scale

edge)

4. Printing paper size Normal paper A4/Letter

Photo paper A4/Letter

Figure 1-1. Scan Area

Table 1-2. Scan Area

Document

size

A4 210mm 297mm

Letter 216mm

(width)PL(length)

355.6mmat least

(left)

at least

3mm

(right)

at least

3mm

at least

3mm

(top)

at least

3mm

at least

3mm

(bottom)

at least

3mm

at least

3mm

Product Description General Specifications 10

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EPSON Stylus Scan 2000 Revision A

1.2.3 Print area

Paper feed direction

Printable Area

Table 1-3. Print Area

Size PW PL LM RM TM BM

A4 210mm 297mm

Letter 216mm 279mm

B5 182mm 257mm

Legal 216mm 356mm

at least

3mm

at least

3mm

at least

3mm

at least

3mm

at least

3mm

at least

3mm

at least

3mm

at least

3mm

at least

3mm

at least

3mm

at least

3mm

at least

3mm

at least

3mm

at least

3mm

at least

3mm

at least

3mm

Figure 1-2. Print Area

Product Description General Specifications 11

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EPSON Stylus Scan 2000 Revision A

1.2.4 Printer

PRINTING

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Print method Drop On Demand ink jet

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Nozzle configuration monochrome 144 nozzles (48 x 3 staggered)

color 48 nozzles each (cyan, magenta, yellow)

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Print direction Bi-direction with logic seeking

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Print speed & printable columns

Table 1-4. Character mode

Character pitch Printable columns LQ speed

10 CPI (Pica) 80 200 cps

Table 1-5. Raster graphic mode

Horizontal resolution

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

Printable area Available dots CR speed

PAPER FEED

1. Feeding method Friction feed with ASF

2. Line spacing 1/6 inch or programmable at 1/360 inch

3. Paper path cut-sheet ASF (front enter, front out)

4. Feed speed 2.36 inch/sec. normal/ continuous

4.5 inch/sec. fast/continuous

CONTROL CODES

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ESC/P Raster

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EPSON Remote Command

Product Description General Specifications 12

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EPSON Stylus Scan 2000 Revision A

PAPER

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Cut-sheets

size: A4 210(W) x 297mm (L) (8.3 x 11.7”)

Letter 216 x 279mm (8.5 x 11.0”) B5 182 x 257mm (7.2 x 10.1”) Legal 216 x 356mm (8.5 x 14.0”) Statement 139.7 x 215.9mm (5.5 x 8.5”) Executive 184.2 x 266.7mm (7.25 x 10.5”)

Photo paper 101.6 x 152.4mm (4 x 6”) thickness: 0.08~0.11mm (0.003~0.004”) weight: 64g/m quality: Exclusive paper, bond paper, PPC

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OHP sheets, Glossy paper

size: A4 210(W) x 297mm (L) (8.3 x 11.7”)

thickness: 0.075~0.085mm (0.003~0.0033”)

NOTE: Transparency printing is only supported at normal temperature.

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Envelopes

size: No.10 241(W) x 104.8mm (H) (9.5 x 4.125”)

thickness: 0.16~0.52mm (0.006~0.02”) weight: 45g/m quality: Exclusive paper, bond paper, Air mail

~90g/m2 (17~24lb.)

Letter 216 x 279mm (8.5 x 11.0”)

DL 220 x 110mm (8.7 x 4.3”)

C6 162 x 114mm (6.4 x 4.5”)

~75g/m2 (12~20lb.)

Printable Area

Figure 1-3. Printable Area for Envelopes

Table 1-6. Envelope Margin

Size

#10 3 mm (0.12”) 28 mm (1.10”) 3 mm (0.12”) 14 mm (0.55”)

DL 3 mm (0.12”) 7 mm (0.28”) 3 mm (0.12”) 14 mm (0.55”) C6 3 mm (0.12”) 3 mm (0.12”) 3 mm (0.12”) 14 mm (0.55”)

Left Margin

(min.)

NOTE: Envelope printing is only supported at normal temperature.

Load long edge first.

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Index cards

size: A6 index 105(W) x 148mm (L) (4.1 x 5.8”)

thickness: less than 0.23mm (0.0091”)

Right Margin

(min.)

Top Margin

(min.)

Bottom Margin

A5 index 148 x 210mm (5.8 x 8.3”) 5x8” index 127 x 203mm (5.0 x 8.0”) 10x8” index 254 x 203mm (10.0 x 8.0”)

(min.)

Product Description General Specifications 13

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EPSON Stylus Scan 2000 Revision A

42.9

38.5

52.7

INK

1. Ink cartridge (black) Type: Exclusive cartridge

Color: Black Print capacity: 900 p ages/A4 (ISO/IEC 10561 Letter pattern

360dpi) Ink life: Two years from production date Storage temperature: -20~40°C (storage, less than a month at 40°C)

-30~40°C (packing storage, less than month at

40°C)

-30~60°C (transit, within 120 hours at 60°C and

within a month at 40°C) Dimensions: 27.8 (W) x 52.7 (D) x 38.5mm (H)

27.8

52.7

2. Ink cartridge (color) Type: Exclusive cartridge

Colors: Magenta, cyan, and yellow Print capacity: 300 pages/A4 (360 dpi, 5% duty each color) Ink life: Two years from production date Storage temperature: -20~40°C (storage, less than a month at 40°C)

-30~40°C (packing storage, less than month at 40°C)

-30~60°C (transit, within 120 hours at 60°C and within a month at 40°C)

Dimensions: 42.9 (W) x 52.7 (D) x 38.5mm (H)

38.5

Figure 1-5. Color Ink Cartridge

NOTE: Ink cartridges are consumable products and cannot by any

means be refilled. Do not use cartridges that have passed their expiration date.

Figure 1-4. Black Ink Cartridge

Ink will freeze at less than -4°C but can be used after thawing for three hours at room temperature.

Product Description General Specifications 14

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EPSON Stylus Scan 2000 Revision A

INPUT DATA BUFFER

64K bytes

1.2.5 Scanner

Product type Sheet-fed color image scanner (without ADF) Sub scan method Sheet-fed type Photoelectric d e vice Color CCD line sensor Max. scan area 8.5 x 14” (216 x 355.6mm) Max. effective pixels 2550 x 4220 pixels (300dpi) Scan resolution main = 300dpi and sub = 300dpi Output resolution 50~4800 dpi (1dpi increments) Scan speed (300dpi, Draft mode)

Color = 4.25 msec/line

Monochrome (bi-level) = 1.68 msec/line Color separation By the CCD color filter Command level ESC/I - B7 Zoom 50~200% (1% increments) Pixel depth 8 bits/color (input 12 bits/pixel/color,

output 8 bits/pixel/color) Gamma correction CRT two levels (A,B)

PRINTER three levels (A,B,C)

User defined = one level Color correction Impact-dot printer

Thermal printer

Ink-jet printer

CRT display

User defined Brightness Seven levels Line art Fixed threshold

TET Digital halftoning AAS

Error diffusion three modes (A,B,C) (Bi-level, Quad-level) Dither (resident) four modes (A,B,C,D)

Dither (user defined) two modes (A,B) Interface USB and IEEE1284.4 Light source White cold cathode fluorescent lamp

Product Description General Specifications 15

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EPSON Stylus Scan 2000 Revision A

1.2.6 Common

ELECTRICAL SPECIFICATIONS

Rated voltage AC 120V

AC 220~240V

Input voltage AC 99~132V

AC 198~264V

Rated current 0.6A (AC 120V model)

0.4A (AC 220-240V model) Rated frequency range 50~60 Hz Input frequency range 49.5~60.5 Hz Power consumption Approx. 29W (local copy printing) Insulation resistance 10M

SAFETY, EMC

Safety UL1950 (UL)

EMC FCC Part15 Subpart B Class B

Ω

at 500V DC

(between AC line and chassis)

CSA C22.2 No. 950 (CSA) EN60950 (VDE)

CSA C108.8 Class B AS/NZS3548 Class B

ENVIRONMENTAL CONDITIONS

Temperature 10~35°C (operating, see figure below)

-20~60°C (non-operating, in packaging) One month at 40°C 120 hours at 60°C

Humidity 20~80% RH (operating, without condensation, see

figure below) 5~85% RH (non-operating, in packaging without condensation)

80 70

Humidity (%)

27 30 35

Temperature (°C)

Figure 1-6. Environment

CE Marking

Low voltage directive 73/23/EEC EN60950

Resistance to shock 1 G, within one ms (operating)

2 G, within two ms (non-op e rating, in packaging)

EMC Directive 89/336/EEC EN55022 Class B

EN61000-3-2 EN61000-3-3

Resistance to vibration0.15G (operating)

0.50G (non-operating, in packaging) EN50082-1 IEC 801-2/801-3/801-4

RELIABILITY

Main unit Life 75,000 pages Lamp Life 15,000 hours

Product Description General Specifications 16

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EPSON Stylus Scan 2000 Revision A

1.3 Interfaces

This section is divided into printer and scanner interface specifications. See the following section for printer interface details or see “Scanner interfaces” on page 22 for scanner interface details.

1.3.1 Printer interface

PARALLEL

BUSY signal is set high before setting either -ERROR low or PE high, and held high until all these signals return to their inactive state.

BUSY signal is at high level in the following cases:

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During data entry (see data transmission timing)

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When input data buffer is full

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During -INIT signal is at low level or during hardware initialization

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During printer error (see -ERROR signal)

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When the parallel interface is not selected

ERROR signal is at low level when the printer is in one of the following states:

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Printer hardware error (fatal error)

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Paper-out error

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Paper-jam error

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Ink-out error

PE signal is at high level during paper-out error.

1. Specifications Transmission mode 8 bit parallel, IEEE-1284 ECP compatibility/nibble

mode Synchronization Refer to the IEEE-1284 specification Handshaking Refer to the IEEE-1284 specification

Packet Refer to the IEEE-P1284.4 Standard for Data Delivery

and Logical Channels for IEEE Std. 1284 Interface

(Draft D1.50) Signal level TTL compatible level (IEEE-1284 Level 1 device) Data trans. timing Refer to the IEEE-1284 specification

2. Connector pin assignment and signals

Table 1-7. Forward channel pin assignments and signals

Pin # Signal Name

1 -STROBE 19 In

2 DATA0 20 In 3 DATA1 21 In 4 DATA2 22 In 5 DATA3 23 In 6 DATA4 24 In 7 DATA5 25 In 8 DATA6 26 In 9 DATA7 27 In

10 -ACKNLG 28 Out

11 BUSY 29 Out

12 PE 28 Out

13 SLCT 28 Out 14 -AFXT 30 In Not used

31 -INIT 30 In

Return

GND pin

In/Out Description

The strobe pulse. Read-in data is preformed at the falling edge of this pulse.

The DATA0 through DATA7 signals represent data bits 0 to 7, respectively. Each signal is high when data is logical 1 and low when data is logical 0.

A negative signal that indicates the printer is ready to accept data

A high signal that indicates the printer is not ready and cannot receive data

A high signal indicates a paper-out error

Always at high level when the printer is on

The falling edge of a negative pulse or a low signal on this line causes the printer to initialize. Minimum 50us pulse necessary.

Product Description Interfaces 17

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EPSON Stylus Scan 2000 Revision A

Table 1-7. Forward channel pin assignments and signals

Pin # Signal Name

32 -ERROR 29 Out 36 -SLIN 30 In Not used

18 Logic H - Out Pulled up to +5V via 3.9KΩ resistor 35 +5V - Out Pulled up to +5V via 3.3KΩ resistor 17 Chassis GND - - Chassis GND

16, 33 19-30

15,34 NC - - Not connected.

GND - - Signal GND

Return

GND pin

In/Out Description

A low signal indicates a printer error condition

Table 1-8. Reverse channel pin assignments and signals

Pin # Signal Name

1 HostClk 19 In 2 DATA0 20 In

3 DATA1 21 In 4 DATA2 22 In 5 DATA3 23 In 6 DATA4 24 In 7 DATA5 25 In 8 DATA6 26 In 9 DATA7 27 In

10 PeriphClk 28 Out

11 PeriphAck 29 Out

12 nAckReverse 28 Out

Return

GND pin

In/Out Description

Data or address information transferred from host to product.

The DATA0 through DATA7 signals represent data bits 0 to 7, respectively. Each signal is high when data is logical 1 and low when data is logical 0.

These signals are use d to trans fer the 1284 extensibility request values to the printer.

Data transferred from product to host.

Printer busy signal and reverse channel transfer data bit 3 or 7

Printer goes to Low and approves nReverseRequest

Table 1-8. Reverse channel pin assignments and signals

Pin # Signal Name

13 Xflag 28 Out

14 HostAck 30 In

nReverseReque

st 32 nPeriphRequest 29 Out This signal produces a host interrupt. 36 1284-Active 30 In 1284 active signal, High in ECP mode.

18 Periph-Logic H - Out

35 +5V - Out 17 Chassis GND - - Chassis GND

16, 33

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

GND - - Signal GND

3. Data trans. timing Refer to the IEEE-1284 specification and the following.

Return

GND pin

30 In

In/Out Description

X-flag signal and reverse channel transfer data bit 1 or 5

Host uses this signal for flow control in reverse direction. Also this signal offers the data bit 9 that is used to judge whether the data or command will be sent on the data signal in forward direction.

This signal goes low to cha nge to the reverse channel.

Always high. Pulled up to +5V via

3.9KΩ resistor Always high. Pulled up to +5V via

1.0KΩ resistor

Product Description Interfaces 18

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EPSON Stylus Scan 2000 Revision A

Table 1-10. Typical tack time

DATA

-STROBE

BUSY

-ACKNLG

ready

setup

data byte n

hold

busy

stb

data byte n +

Parallel I/F mode Time required

High speed 1 us

Normal speed 3 us

* The Logic H signal goes low, 2.0 V or less, when the printer is turned off and

goes high, 3.0 V or more, when the printer is turned on. The receiver shall provide an impedance equivalent to 7.5 KΩ to ground.

4. Extensibility Request:

Figure 1-7. Data Transmission Timing

Table 1-9. Data transmission times

Parameter Minimum Maximum

tsetup 500 ns -

thold 500 ns -

tstb 500 ns -

tready 0 -

tbusy - 500 ns tt-out* - 120 ns tt-in** - 200 ns

treply 0 -

tack 500 ns 10 us

tnbusy 0 -

tnext 0 -

* Rise and fall time of every output signal ** Rise and fall time of every input signal

ack

nbusy

The printer responds affirmatively when the extensibility request values are 00H or 04H, which mean

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00H Request nibble mode reverse channel transfer

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04H Request Device ID;

Return data using nibble mode reverse channel transfer

Device ID:

The printer sends the following device ID string when it is requested.

IEEE 1284.4 is enabled,

[00H][5EH] MFG:EPSON; CMD:ESCPL2,BDC,D4,SPC; MDL:Stylus[SP]Scan[SP]2000; CLS:PRINTER DES:EPSON[SP]Stylus[SP]Scan[SP]2000;

Note: (1)[00H] denotes a hexadecimal value of zero

(2)MDL value depends on the EEPROM setting.

Product Description Interfaces 19

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EPSON Stylus Scan 2000 Revision A

USB

Standard :based on

“Universal Serial Bus Specifications Revision 1.0” “Universal Serial Bus Device Class Definition for

Printing Devices Version 1.0” Bit rate :12Mbps (Full speed device) Data encoding :NRZI Adaptable connector :USB series B Suggested cable length :2 meters

Table 1-11. USB connector pin assignments and signals

Pin no. Signal name In/Out Description

1 VCC 2 -Data bi-directional data

3 +Data bi-directional data, pull up to +3.3V via 1.5K Ω resistor 4 Ground - Cable ground

Pin #2

Cable power, max. power consumption is 100mA

Pin #1

PREVENTING DATA TRANSFER TIME-OUTS

Generally, hosts abandon data transfer to peripherals when a perip heral is in the busy state for dozens of seconds continuously. To prevent hosts from entering this kind of time-out period, the printer slows down the data reception rate to around several bytes per minute, even if the printer is in the busy state. This slowdown starts when the remaining open buffer area decreases to several hundred bytes. The Stylus Scan enters a continuous busy state if the input buffer becomes full.

Pin #3

Pin #4

Figure 1-8. USB Pins

Product Description Interfaces 20

Page 21

EPSON Stylus Scan 2000 Revision A

INTERFACE SELECTION

The Stylus Scan has two built-in interfaces; the USB and parallel interfaces. The interface in use is selected automatically.



Automatic selection

When the Stylus Scan is turned on, it initializes and then goes into an idle state. During this idle period the printer scans the interfaces for incoming data. The interface that receives data first is selected.

When the host stops transferring data and the printer is in the stand-by state for a certain amount of time, the printer returns to the idle state. As long as the host sends data or the printer interface is in the busy state, the interface selection does not change.



Interface status and selection

When the parallel interface is not selected, the interface goes into the busy state. When the printer initializes or returns to th e idle state, the parallel interface goes into the ready state. Be aware that an interrupt signal such as the -INIT signal only takes effect on the parallel in ter face when the parallel interface is selected.

IEEE1284.4 PROTOCOL

The packet protocol described by IEEE1284.4 standard allows a device to carry on multiple exchanges or conversations which contain data and/or control information with another device at the same time across a single pointto-point link. The protocol is not, however, a device control language. It does provide basic transport-level flow control and multiplexing services. The multiplexed logical channels are independent of each other and blocking of one has no effect on the others. The protocol operates over IEEE1284.



Automatic Selection An initial state is compatible interface and starts IEEE1284.4 communication when magic strings (1284.4 synchronous commands) are received.



On An initial state is IEEE1284.4 communication and data that received it by the time it is able to take synchronization by magic string (1284.4 synchronous commands) is discarded.



Off An initial state is compatible interface and never starts IEEE1284.4 communication even if magic strings (1284.4 synchronous commands) are received.

Product Description Interfaces 21

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EPSON Stylus Scan 2000 Revision A

1.3.2 Scanner interfaces

PARALLEL

1. Specification Transmission mode 8 bit parallel, IEEE-1284 ECP (Compatibility/Nibble)

mode Synchronization Refer to the IEEE-1284 specification Handshaking Refer to the IEEE-1284 specification Packet Refer to the IEEE P1284.4 Standard for Data Delivery

and Logical Channels for IEEE Std. 1284 Interface

(Draft D1.50)

Refer to the IEEE 1284.4 specification Signal level TTL compatible level (IEEE-1284 Level 1 device) Data trans. timing Refer to the IEEE-1284 specification

2. Connector pin assignments

Refer to the IEEE-1284 specification

USB

Any items not included in this spec ificati on shall be in compliance with the Universal Serial Bus Specification Revision 1.0



Configuration - the scanner supports the following configurations

Table 1-12. USB Configuration

Element Description

Full Speed Mode (12Mbit/s) Class: Vendor-specific Subclass: Vendor-specific

Device

Configuration

Interface

Endpoint

String Descriptor

Protocol: Vendor-specific Vendor ID: 0x04B8 (Seiko Epson Corp.) Product ID: 0x0105 Number of possible configurations: 1

Number of interfaces supported by this configuration: 1 Characteristics: Self-powered (Re mote wake-up feature not

supported) Max. power consumption from VBUS: 2mA (5V)

No alternate setting Number of endpoints used by this interface (excluding

endpoint 0):2 Class: Vendor specific

Subclass: Vendor specific Protocol: Vendor specific

Bulk IN transfer Max. data transfer size: 64 bytes

Bulk OUT transfer Max. data transfer size: 64 bytes

Language ID: English, US 1: iManufacturer “EPSON” 2: iProduct “Scanner Stylus Scan 2000”



Requests The scanner must support almost all standard device requests. The

scanner does not support vendor specific requests. Some requests and descriptors depend on the configuration (endpoint

number) of each USB device. Therefore this specification recommends the configuration where Endpoint 1 is Bulk IN endpoint and Endpoint 2 is OUT endpoint.

Product Description Interfaces 22

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EPSON Stylus Scan 2000 Revision A

1.4 Control Panel

Paper Error

Black Ink

Maintenance

Color Ink

Maintenance

141

93%

70%

Enlarge/

Reduce

LED

Enlarge/Reduce

Selector

Figure 1-9. Control Panel

Paper Load/Eject

Ink

Maintenance

Scanner Error LED

Color

Bk Grayscale

Bk Text

Copy Mode

Selector

Operate LED

Power

button

Stop/Clear

button

Copy

button

1.4.1 Buttons

Table 1-13. Normal button functions

Button Function

• Loads or ejects paper

Load/Eject

(pushed for two*

seconds)

Cleaning

(pushed for two*

seconds) Cleaning

* The user’s guides state three seconds.

Button Function

Load/Eject

Cleaning

• If the carriage is at the ink cartridge installation position, returns the carriage back to the home position

• Starts the ink cartridge replacement sequence (not available during printing). The carriage mo ves to the black ink cartridge installation position first, and then to the color ink cartridge installation position when pushed a second time.

• Starts the printhead cleaning cycle.

• If the printer is in the “Ink Low” or “Ink Out” condition, starts the ink cartridge replacement sequence.

• Returns the carriage from the ink cartridge replacement position to the home position.

Table 1-14. Power-on button functions

Prints a status sheet that includes firmware version, ink counter, and nozzle check patterns.

Enters the special-settings mode (see table below), which remains active for three seconds. If neither the Load/Eject nor Cleaning button is pushed in that three seconds, norma l initialization begins.

Table 1-15. Special settings mode

Button Function

Load/Eject Resets the real-time counter (power-off time) in EEPROM

Cleaning

(hold for ten

seconds)

Resets the waste ink overflow counter

Product Description Control Panel 23

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EPSON Stylus Scan 2000 Revision A

COPY BUTTON

Table 1-16. Copy button functions

Button Function

Operate • Sets Local Copy Mode as the default.

• Stops the current copy job and ejects the paper during

Stop/Clear

Copy • The default setting for copying is

Copy Mode

Enlarge/Reduce

copying.

• Ejects paper during paper loading.

•Selects

• First press = LED shows current status

• Multiple presses (within 5 sec.s) = moves up one setting each time

• Example First time = Black Text LED activated (default) Second time = Grayscale LED activated Third time = Color Text & Graph LED activated Fourth time = Black Text LED activated

• Selects reduce or enlarge

• Default = 100%

• First press = LED shows current status

• Multiple presses (within 5 sec.s) = moves up one setting each time

• Example First time = Enlarge/Reduce LED only (100%) activated (default) Second time = Enlarge/Reduce and 70% LEDs activated Third time = Enlarge/Reduce and 93% LEDs activated Fourth time = Enlarge/Reduce and 141% LEDs activated Fifth time = Enlarge/Reduce LED only (100%) activated

Grayscale, Black Text,

B & W

Color (Text & Graphics)

and

100%

Table 1-17. Power-on functions for the Copy button

Button Function

Copy

Stop/Clear Changes printout paper size during copying (see below).

Prints a status sheet including firmware version and paper size.

To change the printout paper size during copying, press the Stop/Clear button until the appropriate indicator combination activates, as described below.

Table 1-18. Changing printout paper sizes during local copying

Paper size

Scanner Error Color Grayscale B lack Text

A4 on on off off Letter on off off on

Control Panel Indicators

Product Description Control Panel 24

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EPSON Stylus Scan 2000 Revision A

1.4.2 Control panel indicates the printer’s condition

PRINTER

Table 1-19. Printer Condition

Printer status

Printing Flashing - - Ink charging Flashing - - Ink cartridge

replacement mode Paper Out Flashing - - On Paper jam - Off Off Flashing No ink cartridge/

ink end black Ink low black - Flashing - No ink cartridge/

ink end color Ink low color - - Flashing Enter EEPROM and

Timer IC reset Maintenance

request Fatal error Flashing On On Flashing

Power Ink Out (BK) Ink Out (C) Paper Out

Flashing - - -

- On - -

- - On -

- On

Flashing Flashing On On

Indicators

(one second only)

SCANNER

Table 1-20. Scanner Condition

Scanner status

Power Error Priority

Lamp warming up Flashing - 1 Fatal error - On 1 Paper jam - On 2

“-” = does not matter

Indicators

LOCAL COPY

Table 1-21. Copy Status

Scanner status

Power on On - 3 Copying Fla sh ing - 2 Scanner/Printer error

Paper jam

“-” = does not matter

Power Error Priority

-On1

Indicators

“-” = does not matter

Product Description Control Panel 25

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EPSON Stylus Scan 2000 Revision A

1.4.3 Initialization

PRINTER

There are three initialization methods.

1. Power-on (hardware) initialization The printer initializes when turned on or when it recognizes the cold-reset

command (remote RS command). When the printer initializes, the following action s are p erformed.



Initialize printer mechanism



Clear input data buffer



Clear print buffer



Set default values

2. Operator initialization The printer initializes when turn ed on, or when the p rinter recogn izes the -

INIT signal (negative pulse) from the parallel interface. When the printer initializes, the following action s are p erformed.



Cap the printhead



Eject paper

Operation

Power on Valid Valid Panel

Reset Initialize by

command

STOP Valid -

CLEAR - Valid

Operat

StandbyController

ing

Valid Valid

Table 1-22. Initialization

Scanner

process

Set the local copy setting to default

Stop copying Setting remains as is

• Setting mode: default

• Copy mode: Multi-copies volume 1

process

H/W

initialization

Controller

initialization

S/W

initialization

Cancel Eject paper

Printer

process

H/W

initialization

Panel

initialization

S/W

initialization

Restart

Copy

button



Clear input data buffer



Clear print buffer



Set default values

3. Software initialization The ESC@ command also initializes the printer.

When the printer initializes, the following action s are p erformed.



Clear print buffer



Set default values

Product Description Control Panel 26

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EPSON Stylus Scan 2000 Revision A

SCANNER

There are three initialization methods.

1. Hardware initialization The scanner initializes when turned on.

When the scanner initializes, the following actions are performed.



Initialize scanner mechanism



Clear input/output data buffer



Set default values

2. Operator initialization The scanner initializes when it recognizes the -INIT signal (negative pulse)

from the parallel interface. When the scanner initializes, the following actions are performed.



Clear input/output data buffer



Set default values

3. Software initialization The ESC@ command also initializes the scanner.

When the scanner initializes, the following actions are performed.



Clear input/output data buffer



Set default values

Product Description Control Panel 27

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EPSON Stylus Scan 2000 Revision A

1.5 Stylus Scan Errors

PRINTER

Table 1-23. Printer Related Errors

Error Cause Solution

When one or more ink cartridges are almost empty, the printer e nters the l ow-

Ink out

Paper out

Paper jam

No ink cartridge

Maintenance request

Fatal error

ink state and continues printing. When the cartridge is complete ly empty , the printer indicates a n i nk-o ut e rro r an d stops printing.

If the printer fails to properly load paper, it indicates a paper-out error.

If the printer fails to properly eject paper, it indicates a paper jam.

If the printer detects that one of the ink cartridges is not installed, it indicates a no-ink-cartridge error.

When the total amount of waste ink reaches the limit, the printer indicates a maintenance request and stops printing.

A carriage control or CG access error has occurred.

Install a new ink cartridge.

Load paper and press the Load/Eject button.

Press the Load/Eject button. If this does not clear the error, remove the paper by hand.

Install a new ink cartridge.

Replace the waste ink pads.

Turn off the Stylus Scan and turn it back on. If the error does not clear, service.

SCANNER

Table 1-24. Scanner Related Errors

Error Cause Solution

Fatal error

Command error

• The lamp is broken.

• System breakdown.

• Scanner fails to eject the document.

• (Disposition)

Unidentified command detected. (Disposition)

The scanner sent a NACK signal and is waiting for the next command. If an incorrect command or parameter is received, it is disregarded and the previous value is maintained.

Turn off the Stylus Scan and turn it back on. If the error does not clear, service.

Turn off the lamp and stop operation. Set bit 7 of the status byte.??

Send a correct command to clear the error.

NOTE: Do not re-install used ink cartridges. Doing so confuses the ink-

level detection function and may cause a serious problem in the printhead.

Product Description Stylus Scan Errors 28

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EPSON Stylus Scan 2000 Revision A

1.6 Physical Characteristics

1.6.1 Dimensions

228 x 437 x 279 mm (HWD)

1.6.2 Weight

7.5 Kg

1.6.3 External view

Figure 1-10. EPSON Stylus Scan 2000

Product Description Physical Characteristics 29

Page 30

OPERATING PRINCIPLES

CHAPTER

Page 31

EPSON Stylus Scan 2000 Revision A

2.1 General

The main components of the EPSON Stylus Scan 2000 are the printer mechanism, scanner mechanism, and the following electronic boards;

Main: B101 Main Board Power Supply: B101 PSB/PSE Board Panel: B101 PNL Board

Operating Principles General 31

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EPSON Stylus Scan 2000 Revision A

2.2 Printer Mechanism Operation

Like previous EPSON Ink Jet printers such as the Stylus Color 740, the printer mechanism of the EPSON Stylus Scan 2000 does not have an exclusive mechanism to switch from paper feeding to pumping and back. Instead, this control is done by the rotational direction of the paper feed/pump motor and also depends on the position of the carriage.

The printhead combines the b lack and CMY heads in one un it. The following indicate the nozzle configurations of these 3 models.



Black Nozzles: 144 nozzles (120 dpi x 3 rows in staggered)



CMY Nozzles: 48 nozzles/colors (120 dpi x 1 row)

Table 2-1. Motor Types and Corresponding Functions

Motor Type Function

CR Motor Stepping Used to drive the carriage. page 35

• Drives the ASF to feed paper into paper path

• Drives paper feed rollers at variable

PF Motor Stepping

speeds

• Drives the CR Lock lever (as described on page 40)

• Drives pump unit to absorb ink

For details

see

page 37

PF motor

pinion

Intermittent

gear

PF Motor

Flushing section

Star wheel

Disengage flag

Black I/C sensor

CMY I/C sensor

Carriage unit

Printhead (one unit)

Timing belt

Cap unit

Pump unit

Disengage

lever

73.6 Gear/Precision Gear

ASF

sensor

Detector

wheel

shaft

rollers

PE sensor

Carriage HP

sensor flag

Carriage HP

sensor

Figure 2-1 in the in the right column shows the outline of the printer mechanism.

CR guide shaft

PF roller

CR Motor

PG lever

Figure 2-1. Printer Mechanism Block Diagram

Operating Principles Printer Mechanism Operation 32

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EPSON Stylus Scan 2000 Revision A

2.2.1 Printing Mechanism

The basic principles of the printhead are the same as previous models; DropOn-Demand type MACH head method.

You need to manually input the drive-voltage code (printed on top of the printhead) for the multi-layer piezo electric element. Input this value every time you replace the printhead, MAIN board, or printer mechanism.

The main parts of the printhead and carriage are described below.



PZT PZT is an abbreviation of Piezo Electric Element . The print signal is sent from the PSB/PSE board through the driver board on the and to the PZT. Then, the appropriate PZT squeezes the cavity, forcing the ink stored in the cavity out through the nozzle. This process is described in more detail on the next page.



Ink cavity Ink flows from the ink cartridge, through the filter, and to the ink cavity where it is stored until one of the PZT units forces it out through the nozzles.



Nozzle Plate The bottom surface of the printhead which contains nozzle holes to direct ejected ink toward the paper below. See the next page.



Filter When the ink cartridge is installed, if any dirt or dust around the cartridge needles is absorbed into the inside of the printhead, there is a large possibility that the nozzles will clog. Clogged nozzles can be detected by alignment failure and dot-missing problems. To prevent these kinds of problems, a filter is set below the cartridge needle and ink flows through the filter on its way to the ink cavity.

printhead

unit

Nozzle selector

Board

I/C Out

sensor

actuator

Needle

Ink cartridge

PZT

(Piezo)

unit

Nozzle

plate

Figure 2-2.



I/C Out sensor actuator The I/C Out sensor detects whether or not an ink cartridge is installed according to the position of the I/C Out sensor actuator. When a cartridge is installed, the actuator is pushed down, which turns the shaft that is connected to the act uator. The fl ag at the other end of t he shaft activates the I/C Out sensor when the cartridge is fully in place.

Printhead

Ink cavity

Sectional Drawing

Filter

See the next page for more details on the nozzle s e lector board and the ink ejecting process.

Operating Principles Printer Mechanism Operation 33

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EPSON Stylus Scan 2000 Revision A

Ejecting State:

2.2.2 Printing Process

The following figures show sectio nal drawing s of th e printh ead in the n ormal and ejecting states.

Normal State:

1. When no print signal is outpu t, the PZT is in the normal, standby, state.

2. When a print signal is sent from the MAIN board, the IC (Nozzle Selector) located on the printhead unit receives the data in 1-byte units. The Nozzle Selector then sends the voltage signal on to the appropriate PZT. Due to the physical properties of the PZT, electrical signals cause the PZT to change shape. When the PZT changes shape, it squeezes the ink cavity, ejecting ink out through the nozzles.

Ink course

Piezo unit

Nozzles

Figure 2-3. Printhead Normal State

Cavity

Nozzle plate

surface

Figure 2-4. Printhead Ejecting State

Operating Principles Printer Mechanism Operation 34

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EPSON Stylus Scan 2000 Revision A

Rotor

2.2.3 Carriage Mechanism

The carriage mechanism moves the carriage back and forth according to the drive from the carriage motor. See Figure 2-6 on the next page.

The carriage motor is a 4-phase, 200-pole, stepping motor and is driven by 2-2 phase, 1-2 phase, Double 1-2 phase, 2-Double 1-2 phase, and 4-Double 1-2 phase drives. This stepping moto r allows the carriage to move freely to fixed positions where necessary operations such as ink absorption can be performed. The following tables show carriage the motor specifications and motor controls.

Table 2-2. Carriage Motor Specifications

Items Description

Motor type 4-Phase/200-pole Stepping motor Drive voltage Range 42VDC ± 5%

Internal coil resistance

Control method Bi-Polar Drive

Table 2-3. Phase drive

7.8 Ohms ± 10%(per phase under 25 °C environment)

Table 2-4. CR Motor Control at Each Mode

Printing mode

High Speed Skip 340 4080

Normal Printing 200 2400

Capping 80 960

Wiping 40 480

Cap (Valve Release)

Withdrawal of cap 5 60

Drive Speed

[CPS]

20 240

Drive frequency

[PPS]

Drive method

Double1-2, 2-2,1-2 phase drive*

Double 1-2, 2-2 phase drive

2-Double 1-2, 2-2 phase drive

4-Double 1-2, 2-2 phase drive

Phase Drive inch/pulse mm/pulse

2-2 1/120 0.212 1-2 1/240 0.106

Double 1-2 1/480 0.053 2-Double 1-2 1/960 0.026 4-Double 1-2 1/1920 0.013

Figure 2-5. CR Motor Internal Circuit Diagram

Operating Principles Printer Mechanism Operation 35

Page 36

EPSON Stylus Scan 2000 Revision A

PLATEN GAP LEVER

Carriage

motor

Rear (thick

paper) position

Parallelism

adjust

lever

Paper feed

roller

Paper eject

rollers

Timing

belt

Paper guide

(front)

Home position

sensor

Carriage

unit

Forward (normal) position

Platen Gap

lever

Figure 2-6. Carriage Mechanism with platen gap lever (Top view)

As shown in Figure 2-6, the Platen Gap lever can be moved forward or back to adjust for the thickness of the paper. The PG lever is connected to the carriage guide shaft, which raises or lowers the carriage depending on the PG lever position. The nozzle surface remains parallel to the paper in either position thanks to a tilt adjustment mechanism. Also, the two parallelism-adjustment levers, one mounted on each side of the carriage guide shaft, adjust the parallelism between the platen and shaft when the shaft is installed in the factory. This precise adjustm e nt is necessary to make sure the gap between the platen surface and the printhead surface is 1.04 mm in the normal position or 1.74 mm in the thick-paper position.

Operating Principles Printer Mechanism Operation 36

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EPSON Stylus Scan 2000 Revision A

Rotor

2.2.4 Paper Feeding Mechanism

The paper feeding process begins at the ASF, continues through the PF roller, and ends at the paper eject roller (and star-wheel gear).

The ASF unit, which is common with the Stylus COLOR 740 printers, is driven by the PF motor (stepping motor). Torque sent from this motor switches between the ASF unit and pump/PF roller depending on the position of the disengage lever (described later).

In the EPSON Stylus Scan 2000, a four-phase hybrid type pulse motor is used in the PF motor as a motive power of the paper mechanism. The torque is sent at 2-Double 1-2, Double 1-2, 1-2, and 2-2 phase drives. This motor drives the paper-feeding mechanism as well as the pump mechanism which is necessary for printhead cleaning. By using this pulse motor, it becomes possible to use variable drive levels for many purposes, such as paper feed, slight paper feed, and high or low speed absorption of pump operations. The following table shows PF motor specifications.

Table 2-5. PF Motor Specifications

Item Description

Motor type 4-phase/200-pole Stepping motor Drive voltage 42VDC ± 5%

Coil Resistance

8.8 Ohm ± 10%(per 1 phase under 25°C environment)

Table 2-6. Phase drive

Phase Drive Inch/pulse mm/pulse

2-2 1/720 0.035 1-2 1/1440 0.018

Double 1-2 1/2880 0.0088

2-Double 1-2 1/5760 0.0044

Figure 2-7. PF Motor Internal Circuit Diagram

Control method Bi-Polar Drive Phase drive 1-2, 2-2, Double 1-2, 2-Double 1-2

Operating Principles Printer Mechanism Operation 37

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EPSON Stylus Scan 2000 Revision A

Table 2-7. Print Modes and Drive Methods

Printing mode

High Speed Skip 340 4080

Normal Printing 200 2400

Capping 80 960

Wiping 40 480

Cap (Valve Release)

Withdrawal of cap 5 60

Drive Speed

[CPS]

20 240

Drive frequency

[PPS]

Drive method

Double 1-2, 2-2,1-2 phase drive*

Double 1-2, 2-2 phase drive

2-Double 1-2, 2-2 phase drive

2-Double1-2, 2-2 phase drive

4-Double1-2, 2-2 phase drive

4-Double 1-2, 2-2 phase drive

Drive from the PF motor is sent to the P F rollers and paper eject rollers as described below.



To the PF rollers: PF motor pinion gear (CCW rotation)



To the eject rollers: PF motor pinion gear (CCW rotation) (13.5, 30.8)

NOTE:

Above CCW rotation is mentioned viewing from the PF motor pinion gear side.

→

Spur gear (28) → Paper eject rollers

→

Gear 73.6 → PF rollers

→

Gear 73.6 → Combination gear

Figure 2-8 shows a paper feeding mechanism block diagram, which includes the parts along the PF motor drive-transmission paths.

Gear

73.6

Combination Gear13.5,30.8

Paper Eject Roller

PF motor

Gear 28

PF Roller

Star Wheel Assy.

Figure 2-8. Paper Feeding Mechanism (Top View)

The printer feeds paper from the ASF (when the PE sensor located near the carriage motor detects paper is loaded) through the paper path and stops feeding when the paper’s leading edge reaches the halfway point of the front paper guide. To correct for any misfeeding, the paper is fed back toward the ASF a predetermined number of steps and then it is fed forward again until it reaches the top-of-form position.

Once the printer starts printing, it advances paper using the PF rollers and subrollers until it reaches the last 14mm of the paper, when it advances the paper using the star wheel gear and paper eject rollers.

Torque sent from the ASF/Pump motor to the ASF unit via the disengage mechanism is used for the following operation.

Operating Principles Printer Mechanism Operation 38

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EPSON Stylus Scan 2000 Revision A

MULTI-FEED PREVENTION MECHANISM

Like the Stylus COLOR 740 ASF, the ASF built in the Stylus Scan has the multiple-paper-feeding-prevention mechanism to provide accurate and consistent paper feeding. This mechanism prevents a sheet of paper from falling from the paper set position in to the paper path. A paper return lever in the mechanism pushes paper that may have fallen off back onto the hopper. After this motion is completed, the LD roller starts loading paper . The multiple-paper-feeding-prevention operation is described in the following steps.

1. When the printer power is turned on, the ASF/Pump motor rotates counterclockwise to detect ASF home position. Then the motor rotates clockwise specified steps to set the LD roller and paper return lever to their proper positions. (See “Standby State” in Figure 2-9.)

2. When the paper loading signal is sent from the PC or the Load/Eject button is pressed, the PF motor turn s counterclockwise to let the LD roller load paper. (See “Paper Pick Up State” in Figure 2-9.)

3. Due to the design of the ASF, the LD roller loses friction on the paper and stops at the point where the paper is fed by the PF roller. (See “PF Roller Paper Feed State” in Figure 2-9.)

4. When the next print signal is sent or the Load/Eject button is again pressed, the PF motor rotates clockwise a specified number of steps to set the LD roller and the paper return lever in place. (See “Standby State” in Figure 2-9.)

NOTE: If no print signal is sent for a predetermined number of

seconds in step 4, the LD roller and the paper return lever automatically return to the standby state.

Figure 2-9. Multiple Paper Loading Prevention Mechanism (right side view)

Operating Principles Printer Mechanism Operation 39

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EPSON Stylus Scan 2000 Revision A

SMALLER TRAILING-EDGE MARGIN

Like the Stylus COLOR 740, this model uses a new design to allow printing up to the last 3mm by changing the design and position of the star-wheel gear. The star-wheel gear assembly has been shifted 5 degrees from directly on top of the eject rollers towards the front paper guide. This change suppresses the tailing edge of the paper so that the old minimu m margin of 14mm has been reduced to only 3mm.

Old Feeding

Method

Paper

New Feeding

Method (from

COLOR 740)

Star wheel

Assembly

Eject rollers

Moved to a 5 degree angle

Printhead Support roller

Platen

3mm bottom margin

may contact printhead

PF roller

CARRIAGE LOCK MECHANISM

The carriage lock mechanism prevents the carriage from being left at an uncapped position for a long time which can occur due to user mistakes, physical shock, vibration during transport, and so on. The CR lock mechanism is driven by the stepping PF motor. See Table 2-5, “PF Motor Specifications,” on page 37 for motor specifications.

The PF motor controls the CR lock mechanism as well as the PF mechanism depending on the direction of the PF motor rotation. The CR lock mechanism is located at the right end of the paper eject roller.

Top view

Bushing 6

Pump Planetary

Lever

CR Lock

Lever

Right-side view

Carriage

Paper Eject

roller

Middle frame

Pump

Planetary

Lever Guide

Figure 2-11. CR Lock Mechanism

While the PF motor drive is used for paper feeding (PF motor rotation = CCW),

This area remains

stable

the CR Lock Lever is set under the Paper Eject Frame. But the CR Lock lever rises up and locks the carriage when the PF motor rotates CW.

Figure 2-10. 3mm improved margin (viewed from right side)

Operating Principles Printer Mechanism Operation 40

Page 41

EPSON Stylus Scan 2000 Revision A

The PF motor drive is sent to the CR Lock lever via the Paper Eject roller.

PF Motor pinion gear (CW rotation)

Gear 28

→

Paper Eject Roller

→

CR Lock Lever

→

Gear 73.6

→

Combination gear

→

If the carriage is left uncapped for a long time, ink on the printhead surface gradually thickens and may clog the nozzles. In some cases, the nozzles may be so thoroughly clogged that they cannot be cleared even after performing multiple cleaning operation s.

To prevent clogged nozzles, the printer caps and locks the carriage in the following conditions.



Power off sequence:

When power is turned off, even during printing, the printer caps and locks the carriage at the end of the power-off sequence.



Power on sequence:

When power is turned on, the printer automatically performs an automatic (power-on) cleaning cycle and then caps and locks the carriage.

NOTE: The power-on cleaning cycle is an automatic head cleaning

sequence that is performed every time the power is turned on. The timer IC, which is powered by the lithium battery, measures the length of time the printer has been off. The printer selects and performs the appropriate cleaning operation according to the length of time it has been off.

PAPER PICK UP OPERATION

When the Load/Eject switch is pressed or printing order is inp ut, the carriage unit moves until the left edge and collides with paper pick up trigger lever. When the carriage collides with this trigger level, a planetary gear located on the same axis is also pushed at the same time and conveys the motive power on the platen to the adjoining gear line side for ASF drive.

Gear 34/ ASF roller drive gear

Combination

gear 16,40.8

Paper pickup

trigger lever

Gear 36/

Eject roller

drive gear

Combination

G 12.4,28/

Eject roller

transmission

gear

PF motor

Spur 23.2/ASF

roller

transmission

gear

Gear 73.6

pinion gear

Combination G

16,21.6/Platen roller

transmission gear

Figure 2-12. Paper Pickup Mechanism



Paper eject sequence:

When the Load/Eject button is pressed, the printer ejects any paper in the paper path. If no print data is received at this time, the printer caps and locks the carriage and then enters the standby mode. However, if no paper is in the paper path when the Load/Eject is pressed, the printer loads a sheet and does not lock the carriage.

PF motor torque is always transmitted to the CR lock lever side, but the operation of the CR lock mechanism varies depending on the rotation direction of the motor.

Clockwise = sets the carriage lock lever Counterclockwise= releases the carriage lock lever

Operating Principles Printer Mechanism Operation 41

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EPSON Stylus Scan 2000 Revision A

2.2.5 Ink System

Ink system mechanism consists of 1) cap mechanism, 2) pump mechanism, 3) carriage lock mechanism, 4) waste ink absorber and 5) ink sequence. Out of these mechanisms, 1) to 4) are physical mechanism and parts which are mounted on the printer mechanism and 5) the ink sequence is performed automatically by the firmware. The EPSON Stylus Scan 2000 has no engage/ disengage mechanism, meaning the pump and platen are always at work when the PF motor operates. The figures below show printhead positions when the ink system and various ink-pumping sequences are performed.

Eject roller

drive gear

PF roller drive

gear

Carriage lock

lever

Cleaner blade

Figure 2-14. Major Ink Sequence Positions on Carriage

Printable Area

2976 dots (360-dpi)

A. ASF Pick-up position B. Flushing C. Wiping/rubbing position D. Flushing position E. Ink Discharge position F. Cap cleaning position

Eject roller

transmission

gear

PF (pump)

motor pinion

gear

Pump roller

Cap unit

Figure 2-13. Ink System Mechanism

Operating Principles Printer Mechanism Operation 42

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EPSON Stylus Scan 2000 Revision A

2.2.6 Pump, Carriage Lock, Head Cleaner Mechanism

n the EPSON Stylus Scan 2000, there is no switch or mechanism to switch between the ink pump and paper feed operations. Therefore, whenever the paper feed/pump motor rotates, the pump-drive roller inside the pump unit rotates. However, the rotational direction of the rollers determines whether or not the pump sucks ink. Also, even if the pump rotates in the ink-absorption direction, ink is not abso rbed if the carriage is in the false-absorption position. Figure 2-13 shows process of conveying motive power to the pump drive roller.

The process of conveying the motive power to the paper eject roller is shown in Figure 2-15. This motive power is conveyed to Gear C through Gear B. The lever that drives Gear C, the carriage lock, and the head-cleaner mechanism is shown separately but it is constructed as one unit. Since the engagement of these parts depends on the tension of the compression spring, if the lever is burdened, only Gear C and the pump roller rotate and no more motive power is conveyed to the lever part.

Axis of

Paper

eject

roller

Gear C

Gear A

Gear B

Compression

spring

Pump drive

roller

Figure 2-15. Pump Mechanism Power Transmission Process

The table below shows PF/Pump motor rotational direction and pump system operation.

Operating Principles Printer Mechanism Operation 43

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EPSON Stylus Scan 2000 Revision A

Table 2-8. Pump Motor Rotation and Operation

PF motor pinion gear rotation

(looking at gear surface)

Clockwise (CW) forward rotation

Counterclockwise (CCW) backward rotation

1) Release the tubes

2) Disengage Head Cleaner

3) Disengage carriage lock

1) Squeeze tubes to pump ink

2) Engage Head cleaner

3) Engage carriage lock

Refer to Figure 2-16 in the right column which shows the pump operations at clockwise and counterclockwise rotation.

During ink-absorptive operations such as cleaning and flushing (but not during normal printing), ink drains from the ink cartridge to the waste-ink pads through the cap. During printing and flushing, ink is fired out of the nozzles by the PZT. But during absorption operations the head is capped and ink is sucked off the nozzle plate by the force of the vacuum created by the pump drive and the PZT does not move.

Counter-Clockwise

Revolution

Pump unit operation

Clockwise

Revolution

Table 2-9. Pumping modes

Pump Mode Revolutions Absorption

Low speed 0.38rev/second 0.06m l/s ec ond Regular

absorption High speed 2.6rev/second 0.4ml/second Super high speed 3.38rev/second 0.54ml/second

1.3 rev/second 0.2ml/second

Tube squeezed

Tube released

Figure 2-16. Pump Roller Rotation and it’s Operation

Operating Principles Printer Mechanism Operation 44

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EPSON Stylus Scan 2000 Revision A

2.2.6.1 Cap Mechanism

The cap mechanism prevents ink from thickening and sticking on the head surface when the printer is not in operation and it also plays a part in cleaning the printhead. During the power-off sequence, the printhead moves to the right where the head surface and cap come into contact, and the head surface contacts the rubber frame of the cap surface until the power is turned back on.

An absorber pad is spread in the cap and can hold a certain amount of ink which is absorbed from the head without draining it to the waste ink pad. Also, below the absorber pad, there are two valves that control the adhesion pressure between the head and cap surface. There is also one exit and tube to drain ink to the waste ink pads.

Position A When the carriage is out of the HP (for example in the printable area or paper

feed position), the valves on the cap mechanism stay in Position A (closed) as shown to the right.

Position B When the carriage returns to the right, it catches the carriage flag on the cap

mechanism. This raises the cap to meet the head surface. This position is used for head cleaning because the valves are still closed but the rubber around the cap traps air, so when the pump sucks air away from the cap, a vacuum is created and ink is sucked away from the head surface. Ink absorption and slight ink absorption are performed in Position B.

Position C By moving the carriage a little further to the right, the frame flag on the cap

mechanism contacts the frame and the air valve opens. When the carriage is in this position and the pump sucks air, no ink is absorbed from the head surface but ink left in the absorber pad in the cap is drained.

Position A Positions B and C

Carriage flag

Ink Eject Valve

Negative Pressure

Valve

Closed-

valve state

Open-valve

Frame

flag

Figure 2-17. Cap mechanism and valve operation

state

Operating Principles Printer Mechanism Operation 45

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EPSON Stylus Scan 2000 Revision A

2.3 Scanner Mechanism Operation

2.3.1 Mechanism

The figure below describes how the light reflected off the document passes through the lens and reaches the CCD and how the CCD reproduce an image. The CCD reads the light, converts lig ht into various analog data according to the strength of the light, and sends this various analog data to the MAIN board. The analog data received by the MAIN board is converted into digital data, and after being processed, the digital data is sent to the host.

Cooling Cathode

Fluorescence Lamp

Analog

Signal

Lens

CCD

MAIN Board

Figure 2-18. Scanner Operating Principle

Digital

Signal

Host

CCD

CDS

PGA

CCD Signal Processor

MUX

ADC

Digital Signal

OUT

Figure 2-19. CCD Signal Process Circuit

2.3.1.2 Scanner ASF Sensor Input

Sensor Input includes the ASF paper edge sensor. The leading edge of the paper is loaded by hand through the front paper edge

guides. When the paper enters the scanner feed path, it pushes the sensor flag which activates the ASF paper edge sensor. The ASF motor then feeds the paper roughly a quarter of an inch.

2.3.1.1 Video Circuit

The video circuit of the scanner mechanism has a CCD drive circuit and a CCD signal process circuit.

1. CCD drive circuit The CCD drive circuit generates the appropriate signal for the CCD so that the CCD can accurately read the image.

2. CCD signal process circuit The CCD signal processor contains the circuits that are necessary for adjustment and sampling of the three channels. Each signal from CCD goes through CDS (correlated doule sampling) to PGA (programmable gain amplifier). Each R, G, B signal, after having gone through PGA, is selected by multiplexer, converted from analog data to digital data by 10-bit A/D Converter (ADC), and then is output to the B101 MAIN board.

Operating Principles Scanner Mechanism Operation 46

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EPSON Stylus Scan 2000 Revision A

2.4 Local and PC-Centric Copy Principles

This section covers the main differences between Local Copy and PC-Centric Copy operations.



Local Copy = Scan and print the scanned document using only the Stylus Scan processing power. Can be connected or not connected to a computer.



PC-Centric Copy = Scan, process the scanned document in the open application, and print from the application.

2.4.1 Local copy process

Scan > gamma curve > color matching table > print

1. The scanner scans at 300 dpi.

2. The image data is processed through the gamma curve to remove the background color of plain paper.

3. The color matching table is consulted to convert RGB to CMYK.

4. The printer prints at 360x360dpi and color is composite black.

Table 2-10. Stylus Scan 2000 Local Copy

Mode Setting

B/W LineArt 300 360x360 Plain Paper

Scan Res.

dpi

Print Res.

dpi

Media

2.4.2 PC-Centric copy process

PC-Centric Copy Settings

Mode Setting Scan Res. dpi Print Res. dpi Media

Normal 240 Speed All

Text

Fine 360 Quality All Normal 240 Speed All

Text & Image

Fine 360 Quality All Normal 240 Speed All

Photo

Fine 360 Quality All Normal 240 Speed All

OriginalColorCopy

Fine 360 Quality All

2.4.2.1 Normal PC-Centric copy

Scan > gamma curve > image enhancment > color matching table > print

1. The scanner scans at 300 or 600 dpi, but EPSON TWAIN calls for 240 or 360 dpi image data (to match printer resolution).

2. The image data is analyzed to remove the background color of paper and to remove any image from the reverse side of the paper.

B/W Grayscale 300 360x360 Plain Paper

3. The image is improved; edges are sharpened, characters smoothed out, moire removed (usually - see original color copy below), and a feature

Color (CMY only)

Color 300 360x360 Plain Paper

similar to PhotoEnhance is used to improve quality.

4. The color matching table is consulted to convert RGB to CMYK.

5. The print resolution varies according to media type; same as Speed vs. Quality slide bar in the printer driver.

Operating Principles Local and PC-Centric Copy Principles 47

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EPSON Stylus Scan 2000 Revision A

2.4.2.2 Original color copy

Scan > OriginalColorCopy > c olo r matching > print

1. The scanner scans at 300 or 600 dpi, but EPSON TWAIN calls for 240 or 360 dpi image data (to match printer resolution).

2. The image data is not analyzed or modified.

3. The LUT is consulted to convert RGB to CMYK.

4. The print resolution varies according to media type; similar to th e Speed vs. Quality slide bar in the printer dr iver.

Operating Principles Local and PC-Centric Copy Principles 48

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EPSON Stylus Scan 2000 Revision A

2.5 Electrical Circuit Operating Principles

EPSON Stylus Scan 2000 contains the following three electric circuit boards.



Main: B1 01 Mai n Boar d



Power Supply: B101 PSB/PSE Board



Panel: B101 PNL Board

Refer to Figure 2-20 for the major connection of the 3 boards and their roles.

AC Input

B101 PSB/ PSE Board

+42VDC

+12VDC

CR Motor

PF Motor

(Pump Motor)

Nozzle selector

Board

+5V/

3.3V DC

B/CMY Ink

Out Sensor

B101 MAIN Board

CR HP

Sensor

Thermisto

Printhead

VDC

Ink End

and P-off

time

+5VDC

B101

PNL

ASF Lever

Position Sensor

ASF Motor

LED

CCD sensor

+12VDC

Scanner

Figure 2-20. Electric Circuit layout

Operating Principles Electrical Circuit Operating Principles 49

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EPSON Stylus Scan 2000 Revision A

2.5.1 B101 PSB/PSE Board

The power supply board for the EPSON Stylus Scan 2000 generates +42VDC to drive the motors, +12VDC to power the lamp, +5VDC to power sensors/ printer logic, and +3.3VDC for some printer logic. The table below shows how the voltages are applied.

1. Even if the power button is pressed during the middle of a print job, the actual driving power is cut off thirty secon ds later; after the carriage goes back to the carriage lock position to prevent clogged nozzles.

2. If power is turned off while paper is being fed in the printer, the same operation mentioned above is performed and the driving power is turned off after the paper is completely ejected. The time allowed is approximately 30 seconds, meaning voltage is flowing for 30 seconds after the power is turned off.

Table 2-11. Application of DC Voltage

Voltage

• CR Motor

+42VDC

+12VDC

+5VDC

+3.3VDC Control circuit

• PF/Pump Motor

• Printhead drive

Printer Scanner

Application

ASF motor Inverter board CCD sensor board

Common

Control circuit

Sensors (CR HP, PE, ASF)

Control panel

Printhead control

Figure 2-21 shows a block diagram of power supply board. The process from the input of AC voltage to the output of DC voltage is explained in the following pages.

Operating Principles Electrical Circuit Operating Principles 50

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EPSON Stylus Scan 2000 Revision A

SECONDARY SIDE

+42V

IC51

+5V regulator

ZD51,ZD81-86

+42V line

constant control

+12V

regulator

IC53

Smoothing

circuit

C51,C52

D51

C11

Smoothing

circuit

Fuse

F1 L1, R1,

AC input

Figure 2-21. B101 PSB/PSE Board Block Diagram

+5V

+3.3V

+3.3V regulator

ZD52,87

+42VDC line over

voltage limitation

+12V line over

voltage limitation

C56,Q82,

Q83

Transformer (T1)

switch-

Filter circuit

C1-4

voltage limitation

+12V

ZD55

Power drop delay circuit

Main

rectifier circuit

+5V line over

Full wave

DB1

Power signal

from MAIN

board/power

switch

ZD53

PC1

Photo coupler

Feedback

circuit

Q2,Q3,Q

31,IC1

PRIMARY SIDE

1. As long as the AC plug is plugged into a power source, voltage flows through the primary side (bottom in figure above) of the power supply board.

2. The fuse prevents damage to the power supply board in case the current is too strong.

3. The filter circuit acts to filter incoming electrical noise and to smoothen the electrical current.

4. The full wave rectifier circuit converts AC to DC.

5. The smoothing circuit stabilizes out the DC wave.

6. The main switching circuit controls the flow of current to the transformer (hence to the entire secondary side). The main switching circuit, transformer, and feedback circuit work in combination like the heart, lungs, and brain (respectively) of the human body. The main switching circuit is the variable-flow generator like the heart, the transformer convert the power to a usable form like lungs adding oxygen to blood, and the feedback circuit controls the flow like the brain controlling the heartbeat/ pulse.

7. The transformer receives approximate 100V or 220V DC (depending on the model) current and steps the current down before sending it out to the secondary side.

8. The current is stabilized as it goes through another smoothing circuit.

9. The +12V, +5V, and +3.3V regulators control the flow of current so that only the rated voltage flows through each regulator.

10. The +42V, +12V, and +5V line over-voltage limitation protectors monitor their individual lines for any voltage over the rated amount. If overcurrent is detected, a signal is sent to the photo coupler to decrease current.

11. The +42V line constant control is similar to a regulator in that it is always working, but instead of fixing the current it reports over-current to the photo coupler.

12. The photo coupler communicates over-current problems to the feedback circuit by means of a photo emitter. A photo emitter is used to make sure that currents between the primary side (AC as well as DC) and secondary side (DC only) do not mix and short the board.

Operating Principles Electrical Circuit Operating Principles 51

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EPSON Stylus Scan 2000 Revision A

13. The feedback circuit 1) receives over-current information from the photo coupler by means of a photo receiver 2) monitors the transformer for overcurrent and 3) receives power-supply information/commands from the MAIN board and power switch. The feedback circuit slows down the voltage sent from the main switching circuit to the transformer when necessary.

14. The power-drop delay circuit is a thirty-second timer that makes sure there is enough time to complete the power-down sequence after power is turned off.

Operating Principles Electrical Circuit Operating Principles 52

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EPSON Stylus Scan 2000 Revision A

2.5.2 B101 MAIN Board

The B102 MAIN Board controls the printer, scanner, copy function, pumping, paper feeding, and all signals to/from the control panel unit. The following figure shows the MAIN Board circuit diagram for EPSON Stylus Scan 2000.

Operating Principles Electrical Circuit Operating Principles 53

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EPSON Stylus Scan 2000 Revision A

USB

hub

CN3

IC17

8bit data

BUS

1284 I/F

IC9

1284 Transceiver

System & Scan-

ner Block

(See the B101 MAIN

Board 2 schematic in

Chapter 7)

1284

Buttons

Printer Block

(See the B101 MAIN

Board 1 schematic in

Chapter 7)

CN1

CN2

Panel

Unit

Scanner

Mech.

LED/LCD

Printer

Mech.

MAIN Board

CN10

PSB/PSE Board

Figure 2-22. B101 Main Board Block Diagram

Operating Principles Electrical Circuit Operating Principles 54

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EPSON Stylus Scan 2000 Revision A



The System & Scanner Block The System & Scanner Block is all of the ICs that handle image data from

the scanner. Also this block handles all control/communication signals sent to and from the Control Panel unit.



The Printer Block The Printer Block is all the ICs th at handle print data and communication

data to and from the print mechanism. The print data can come through the USB or parallel port, and communication can be with the print mechanism, System & Scanner Block, or host. One example of communication data from the System & Scanner Block would be a paper feed signal generated when the user presses the Paper Feed button.



The USB hub There are actually two USB interfaces (one for each IC block) on this model

plus the USB hub. The hub receives incoming signals or data and determines which IC block to send the data to.

Operating Principles Electrical Circuit Operating Principles 55

Page 56

TROUBLESHOOTING

CHAPTER

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EPSON Stylus Scan 2000 Revision A

3.1 Unit Level Troubleshooting

When a problem occurs, you can identify the defective unit according to the symptoms exhibits. The table below lists the symptoms of certain problems. Once the problem is identified, refer to the flowchart that corresponds to the problem.

The following flowchart illustrates the main steps of the troubleshooting process.

NOTE: There is a special section for motors and sensors that starts on

page 69.

Diagnose problem



Table 3-1, “Printer Condition and Panel Status”



Table 3-2, “Symptoms and Problems”

Unit Level

Repair

Componen

t Level Repair

Printer Mechanism,

page 61

Service:

Scanner

Mechanism,

page 65

Or go directly to

Motors and Sensors

on page 69

Table 3-1. Printer Condition and Panel Status

Indicators

Error Status

Paper Out --- --- --- On

Paper jam condition

No Ink cartridge or Ink end (black)

No Ink cartridge or Ink end (color)

Maintenance request/ Service Call

Fatal error Flash On On Flash

Power

Flash Flash Flash Flash

Ink out

(Black)

--- Off Off Flash

--- On --- ---

--- --- On ---

Ink Out

(Color)

Paper Out

Recovery

Load paper by pressing the load/eject button.

Eliminate a paper then press the load/eject button.

Install a new black ink cartridge by pressing the load/eject button for 3 seconds.

Install a new color ink cartridge by pressing the load/eject button for 3 seconds.

Change the waste ink drain tank and reset the EEPROM.

Turn the printer off and on again. If the printer does not recover, repair the appropriate part.

Reassembly = Chapter 4 Adjustment = Chapter 5

Figure 3-1. Troubleshooting Process Flowchart

Troubleshooting Unit Level Troubleshooting 57

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EPSON Stylus Scan 2000 Revision A

Table 3-2. Symptoms and Problems

Symptom Problem Flowchart No.

Printer does not operate at power on.

Error is detected Error is indicated by LED indication. Flowchart 3-1

Failure occurs during printing.

Printer does not feed paper correctly.

Control panel operation is abnormal.

LEDs do not light. Printer mechanism does not operate.

Flowchart 3-1

Printing is not performed. Abnormal printing (missing dot, etc.)

Flowchart 3-1

Print quality is poor. No paper is fed.

Paper feed is irregular.

Flowchart 3-1

Paper jam occurs.

No response to button access. Flowchart 3-1

3.1.1 Printer/Scanner does not operate at power on

Start

AC voltage

= OK?

Yes

Is fuse

F1 burned

out?

Check the output voltage of CN2 on the power supply.

Yes

Is the

output voltage

normal?

Yes

Replace the MAIN board.

Yes

Adjust power

supply

Replace the fuse, disconnect CN10 on MAIN board, and turn on power

Check the motors, printhead, and other components.

Replace the power supply.

Did

the fuse burn

out again?

Yes

End

Flowchart 3-1.

Troubleshooting Unit Level Troubleshooting 58

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EPSON Stylus Scan 2000 Revision A

3.1.2 Error is detected

Start

Check the LED and refer to Table 3-1.

Is the

problem carriage

related?

Is it an ink

cartridge error?

Maintenance Error

Replace the waste ink pads and reset the counter. See Section

4.2.2.1 on page 81.

Check the ink cartridge sensor and replace the printhead if necessary.

Yes

Turn off the Stylus Scan and move the carriage by hand.

Yes

Replace the ink cartridge.

Yes

move smoothly?

Does it

Yes

Does it

move smoothly?

Yes

Replace MAIN board if the CR motor operates properly.

Does it

move smoothly?

See Table 3-3.

3.1.3 Failure occurs during printing

Start

Print a nozzle check pattern.

Did it print

properly?

Yes

print quality

normal?

Yes

Perform cleaning.

Problem

solved?

Yes

Perform adjustment. See Section 5.2 on page 110.

Replace the ink cartridge and print self test.

Yes

Problem

solved?

Refer to Table 3-3.

MAIN

board cables

are OK?

Connect them.

Problem

solved?

Yes

Replace the MAIN board.

Yes

Refer to

Table 3-3.

Problem

solved?

Yes

End

Yes

Problem

solved?

Flowchart 3-1.

Troubleshooting Unit Level Troubleshooting 59

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EPSON Stylus Scan 2000 Revision A

Control

panel connected

correctly?

START

Connect the

control panel

correctly.

YES

END

Is the

problem

solved?

Replace the

control panel.

Replace the

MAIN Board.

Control

panel connected

correctly?

3.1.4 Printer does not feed paper correctly

START

Set the paper correctly.

Is the

PF motor

running?

YES

Paper

loaded correctly

in ASF?

YES

PF roller

and platen

rotate?

YES

Remove any

obstruction in the paper

path if there is any.

Clean the roller of

paper path.

3.1.5 Control panel operation is abnormal

Check the PF motor.

No problem = replace

the MAIN board.

Is the

problem

solved?

YES

END

Refer to Table 3-3.

Flowchart 3-1.

END

Flowchart 3-1.

Troubleshooting Unit Level Troubleshooting 60

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EPSON Stylus Scan 2000 Revision A

3.2 Repair of the Printer Mechanism

This section provides instruction for repairing the p rinter mechanism. It describes various problems, symptom, likely causes, checkpoints, and solutions. Select appropriate symptom from the table and check each parts and its function as described in the checkpoint.

Table 3-3. Repair of the Printer Mechanism

Symptom Condition Cause Check Point Solution

Abnormal pump mechanism operation

Ink is not absorbed or is poorly absorbed.

Abnormal carriage operation.

Abnormal PF motor operation when the power is turned on.

Used ink does not go through the waste ink tube.

Abnormal carriage operation at power on.

Abnormal carriage operation during printing.

Foreign substances are loaded in the PF gears.

The PF motor is defective . (Refer to Table5-1)

The pump tube is crashed.

Capping rubber is damaged or deformed.

The tube is out of the cap.

Pump bulb is not closed at absorption.

Foreign substance in the CR drive gear.

CR motor is defective.

Carriage movement is not smooth.

Manually rotate the platen drive gear and check it if it rotates normally.

Check the inner coil resis tance and see if there is any disconnection of the coil.

Check the tube visually. Fix the crashed part by the airgun.

Check the capping rubber visually. Replace the cap mechanism.

Check if the tube is out of the cap visually.

Check the bulb operation visually. Replace the cap mechanism.

Check visually if there are any substances or not.

Check the inner coil resis tance and see if there is any disconnection of the coil.

Check whether the carriage moves smoothly when moved manually.

Check the tension of the timing belt.

Check if there are any foreign substances in the carriage path.

Remove any foreign substances.

Replace the PF motor.

Connect the tube properly.

Remove any foreign substances.

Replace the CR motor.

Clean and lubricate the carriage guide axis.

Adjust tension mechanism or replace it.

Remove any foreign substances.

Troubleshooting Repair of the Printer Mechanism 61

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EPSON Stylus Scan 2000 Revision A

Table 3-3. Repair of the Printer Mechanism (continued)

Symptom Condition Cause Check Point Solution

Printing is not performed.

The carriage moves, but no printing is performed.

Head FFC is out of connection.

The FFC is disconnected inside.

I/C is defective.

Head unit is defective.

Check if the head FFC on the board or carriage is connected surely.

Check the FFC by using a tester. Replace the FFC.

Install a new I/C and perform the selftest.

If the condition does not improve even after 2 or 3 cleaning operations, replace the head unit and perform the self-test.

Connect the FFC properly.

Replace I/C.

Replace the head unit.

Troubleshooting Repair of the Printer Mechanism 62

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EPSON Stylus Scan 2000 Revision A

Table 3-3. Repair of the Printer Mechanism (continued)

Symptom Condition Cause Check Point Solution

Abnormal printing (continued on next page)

Only a particular dot causes abnormal printing.

A dot is not printed occasionally.

Black specks or dots.

Print head surface is not clean.

(dot missing)

The head unit is defective.

Capping absorber pad is touching the head surface.

Printhead surface is not clean. (dot-missing)

The head FFC is disconnected inside.

The head FFC is out of connection.

The head unit is detective.

I/C is defective. Install the new I/C and perform self-test. Replace I/C. The head FFC is out of

connection. The head unit is

detective.

Perform the cleaning operation several times and check printing.

Check the head absorber pad visually.

Perform the cleaning operation several times and check printing.

Check the FFC by using a tester. Replace the head FFC.

Check if the head FFC on the board or carriage is connected surely.

Perform the cleaning operation several times and check printing.

Check if the head FFC on the board or carriage is connected surely.

Check connection with the head FFC.

Perform the cleaning.

If condition does not improve even after the cleaning, replace the head.

Replace the head absorber pad if it is deformed.

Perform the cleaning.

Connect the FFC properly.

If condition does not improve even after the cleaning, replace the head.

Connect the FFC properly.

Replace the head if there is no connection problem with the FFC.

A vertical line is not aligned.

Bi-directional alignment is not adjusted.

Perform Bi-D adjustment. Refer to Chapter 4.

Troubleshooting Repair of the Printer Mechanism 63

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EPSON Stylus Scan 2000 Revision A

Table 3-3. Repair of the Printer Mechanism (continued)

Symptom Condition Cause Check Point Solution

Head angle is not correct. Perform head angle adjustment. Refer to Chapter 4. Platen gap is not correct. Perform platen gap adjustment. Refer to Chapter 4.

Abnormal printing (continued)

Abnormal paper feeding.

Printer stops during initialization.

White line appears in the image data.

Paper is not fed.

Fatal error appears.

Dot shooting direction is tilted because head surface is not clean

I/C is defective.

Head unit is defective.

Friction of the PF roller.

Abnormal operation of the hopper.

Malfunction of ASF drive change-over.

Friction of the PF roller.

ASF sensor is defective.

PE sensor is defective.

HP sensor is defective.

Head FFC is disconnected.

Perform the cleaning operation several times and check printing.

Install a new I/C and perform the selftest.

Perform the cleaning operation several times and check printing.

Check if the PF roller rotates w hen paper is not fed.

Check movement of the ASF hopper visually.

Check if the ASF gear rotates visually.

Check if the PF roller slips during paper feeding.

Check the signal lev el of the ASF se nsor. (Refer to Table 5-2)

Check the signal level of the PE sensor. (Refer to Table 5-2)

Check the signal level of the HP sensor. (Refer to Table 5-2.)

Check if the head FFC is connected. Connect the head FFC.

Perform the cleaning operation.

Replace I/C.

Replace the head unit.

Clean the PF roller by the cleaning sheet. Replace the PF roller if it does not recover.

Replace ASF.

Replace gears of the ASF drive change-over.

Clean the PF roller by the cleaning sheet. Replace the PF roller if it does not recover.

Replace ASF sensor.

Replace PE sensor.

CR motor is defective. Check the CR motor cable is connected.

PF motor is defective.

Check if the PF motor cable is connected.

Replace the CR motor if there is no problem in the cable connection.

Replace the PF motor if there is no problem in the cable connection.

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3.3 Troubleshooting the Scanner

This section explains the failure of scanner mechanism; its cause and solution. If any error or failure occurs, check the cause with the flow chart, and treat

appropriately.

1. Is there any problem in the scanner operational mechanism?

2. Does the same error occur repeatedly?

Follow the flow chart below, check the table specified, and take the appropriate action.

3.3.1 Scanner Troubleshooting Flowcharts

SCANNING OPERATION ERRORS

Start

Does scanner

function?

YES

Can you see

the image?

YES

Does it shake a

lot?

Is the start-scan

position correct?

YES

Refer to Table 3.1.1

Refer to Table 3-6

Refer to Table 3-11

Refer to Table 3-7

YES

Is the image

clear?

Refer to Table 3-8

YES

Is there any

abnormal

noise?

YES

Refer to Table 3-11

END

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EPSON Stylus Scan 2000 Revision A

ADF OPERATION ERRORS

Do paper jams

occur frequently?

Does paper

Does it shake a

Is the start-scan

position correct?

Is the image

Is there any

abnormal

Start

skew?

lot?

clear?

noise?

END

YES

Refer to Table 3-9

Refer to Table 3-10

YES

Refer to Table 3-11

Refer to Table 3-7

Refer to Table 3-8

Refer to Table 3-11

3.3.2 Scanner troubleshooting check points

See the following table when scanned-image quality problems seem to be caused by mechanism or system errors.

Table 3-4. Scanner quality troubleshooting

Failure Refer to

Light areas of document appear dark Table 3-5 Scanner seems to operate but no image appears. Table 3-6 Start of scan position is wrong. Table 3-7 The scanned image is not clear. Table 3-8 Paper jams occur frequently. Table 3-9 Feed skewed. Table 3-10

Table 3-5. Light areas of document appear dark

Cause Related Unit Check Method Solution

Lamp Connector is not connected.

Lamp is wrong. Lamp Tester Check Replace the lamp.

Inverter is wrong. Inverter Tester Check

CCD Connector is not connected.

CCD Module is wrong.

Mechanical Module is wrong.

System Error None Visual Check

None Visual Check

B101 MAIN Board Tester Check

Mechanical Module Unit

Tester Check

Connect the connector.

Replace the inverter.

Connect the connector.

Remove the cause or replace the MAIN Board.

Replace the Module Unit.

Re-boot the PC or turn the scanner ON/OFF.

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Table 3-5. Light areas of document appear dark (continued)

Cause Related Unit Check Method Solution

CCD Module is wrong.

Mechanical Module is wrong.

System Error None Visual Check

B101 MAIN Board Tester Check

Mechanical Module Unit

Tester Check

Remove the cause or replace the MAIN Board.

Replace the Module Unit.

Re-boot the PC or turn the scanner ON/OFF.

Table 3-6. Scanner scans but no image appears

Cause Related Unit Check Method Solution

ADF cover is open but scanner still scans.

CCD Connector is not connected.

CCD Board is wrong.

MAIN Board is wrong.

Power Supply is wrong.

Lamp is wrong. Lamp Tester Check Replace the lamp.

Inverter is wrong. Inverter Tester Check

ADF Cover

None Visual Check

CCD Board Tester Check

B101 MAIN Board Tester Check

Power Supply Tester Check

Make sure the cover is all the way down.

Close the ADF Cover.

Connect the connector.

Replace the CCD Board.

Replace the MAIN Board.

Replace the power supply.

Replace the inverter.

Table 3-7. The Start of Scan position is wrong

Cause Related Unit Check Method Solution

Power Supply Connector is not installed.

Power Supply is wrong.

Motor Connector is not installed.

MAIN Board is wrong.

Motor is wrong. Motor Tester Check Replace the motor. Sensor Connector

is not installed.

Sensor is wrong. Sensor

Mechanical Failure. Mechanical module Tester Check

None Visual Check

Power Supply Tester Check

None Visual Check

B101 MAIN Board Tester Check

None Visual Check

Visual Check or Tester Check

Connect the connector.

Replace the power supply.

Connect the connector.

Replace the MAIN Board.

Connect the sensor connector

Replace the sensor module.

Replace the mechanical module.

Table 3-8. The Image is not clear

Cause Related Unit Check Method Solution

Lamp is too dark. Lamp Tester Check

Calibration Reference Plate is dirty.

Calibration Reference Plate

Visual Check

Replace the lamp or the inverter.

Wipe off the calibration reference plate with isopropylalcohol.

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Table 3-8. The Image is not clear (continued)

Cause Related Unit Check Method Solution

Mirror is dirty. Mirror Visual Check

Lens is dirty. Sense Visual Check

Blue protective tape from ASP is still attached to the standard white strip.

Cover (ASP)

Look for blue tape covering the white strip.

Table 3-9. Paper jams occur frequently

Cause Related Unit Check Method Solution

Pad assembly is wrong.

Dust on the pad or roller.

Paper is not set correctly.

Paper is wrong. Operational Error

Motor Connector is wrong.

Pad Assembly

Roller Visual Check

Operational Error

None Visual Check

Check the pad assembly.

Check if the paper is set correctly on the paper support or slide guide.

Check if the user uses the specified paper.

Wipe off the mirror with isopropylalcohol.

Wipe off the sense with isopropylalcohol.

Remove the blue tape.

Replacme the pad assembly and adjust it.

Wipe off the pad or roller with isopropyl-alcohol.

Teach the user the right paper loading position.

None

Connect the connector.

Table 3-10. Paper Feed Skewed

Cause Related Unit Check Method Solution

Paper guide is not set correctly.

Pad assembly is wrong.

Dust on the roller. Roller Visual Check

Paper is not set correctly.

Paper is wrong. O perational Error

Motor connector is wrong.

None

Pad Assembly

Operational Error

None Visual Check

Check the pad assembly.

Check if the paper is set correctly on the paper support or slide guide.

Check if the user uses the specified paper.

Table 3-11. Abnormal noise/shaking

Cause Related Unit Check Method Solution

Check if the paper Paper is not set correctly.

Paper is wrong. Operational Error

Operational Error

is set correctly on

the paper support

or slide guide.

Check if the user

uses the specified

paper.

Replace the pad assembly and adjust it.

Wipe off the roller with alcohol.

Teach the user the right paper loading position.

None

Connect the connector.

Teach the user the right paper loading position.

None

Troubleshooting Troubleshooting the Scanner 68

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Table 3-11. Abnormal noise/shaking

Cause Related Unit Check Method Solution

Motor Unit is wrong.

The connection with motor is wrong.

MAIN Board is wrong.

Motor Unit

None Visual Check

B101 MAIN Board Tester Check

Replace the motor unit.

Replace the motor.

Connect the connector.

Replace the MAIN Board.

3.4 Troubleshooting the Motors and Sensors

This section only covers motor and sensor checkpoints.

Table 3-12. Motor Resistances and Measurement Points

Motor Name Location Check Point Resistance

CR Motor CN7 (MAIN board *)

PF (Pump) Motor CN8 (MAIN board *)

Pins 1 & 3, Pins 2 & 4

7.8 Ohms

7.8 Ohms ± 10%

Table 3-13. Sensor Check

Sensor Name Location Signal Level Sensor Status

Paper End Sensor

Carriage Home Position Sensor

ASF HP Sensor CN6/ Pins 1 & 2 Close: more than 2.4V

Black Cartridge Sensor

CN5/ Pins 1 & 2 Close: more than 2.4V No paper

CN4/ Pins 1 & 2 Close: more than 2.4V

CN9/ Pins 1 & 19 Off: more than 2.4V

Out of home position

Black cartridge installed

10%

Color Cartridge Sensor

Thermistor CN9/ Pins

CN9/ Pins

2 & 19

Off: more than 2.4V

Analog data

Color cartridge installed

Change the VH voltage of charge pulse for common driver circuit

Troubleshooting Troubleshooting the Motors and Sensors 69

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DISASSEMBLY & ASSEMBLY

CHAPTER

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EPSON Stylus Scan 2000 Revision A

W ARNING

4.1 Overview

This chapter describes procedures for disassembling the main components of the EPSON Stylus Scan 2000. Unless otherwise specified, disassembly units or components can be reassembled by reversing the disassembly procedure. Therefore, no specific assembly procedures are included in this chapter, but special points regarding re-assembly are given under the heading “CHECK POINT”. Any adjustments required after disassembling the units are described under the heading “REQUIRED ADJUSTMENT”.

4.1.1

See the precautions given under the headings “WARNING” and “CAUTION” below, before disassembling or assembling the EPSON Stylus Scan 2000.

Precautions for Disassembling the Printer



Disconnect the power cable before disassembling or assembling the printer.



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.



If ink comes into contact with your skin, wash it off with soap and water. If irritation occurs, contact a physician.



A lithium battery is installed on the MAIN Board of this printer. Be sure to observe the following instructions when servicing the battery:



Keep the battery away from any metal or other batteries so that electrodes of the opposite polarity do not come in contact with each other.



Do not heat the battery or put it near fire.



Do not solder on any part of the battery. (Doing so may result in leakage of electrolyte from the battery, burning or explosion. The leakage may affect other devices close to the battery.)



Do not charge the battery. (An explosion may be generated inside the battery, and cause burning or explosion.)



Do not dismantle the battery. (The gas inside the battery may hurt your throat. Leakage, burning or explosion may also be resulted.)



Do not install the battery in the wrong direct ion. (This may cause burning or explosion.)

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4.1.2 Tools

W ARNING

There is danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to your local laws and regulations.

Table 4-1 lists the tools recommended for disassembling , assembling, or adjusting the printer. Use only tools that meet these specifications.

Table 4-1. Tool List

CAUTION

Risque d’explosion si la pile est remplacée incorrectment. Ne remplacer que par une pile du même type ou d’un type équivalent recommandé par le fabricant. Eliminer les piles déchargées selon les lois et les règles de sécurité en vigueur.



Never remove the ink cartridge from the carriage unless this manual specifies to do so.



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.



Apply lubricants and adhesives as specified. (See Chapter 6 for details.)



Make the specified adjustments when you disassemble the printer.



When assembling, if an ink cartridge is removed and needs to be installed again, be sure to install a new ink cartridge because of the following reasons;

(See Chapter 5 for details.)

Tools

(+) Driver No.2 yes B743800200 (+) Driver No.1 yes B743800400 Tweezers yes B741000100 Hexagon Box Driver

(Opposite side: 5.5mm) M3 (5.5mm) wrench yes Pliers yes Acetate tape yes -

Commercially

Available

yes B741700100

Code



Once the ink cartridge moun ted on the printer is removed, air comes into and creates bubbles in the cartridge. These bubbles clog ink path and cause printing malfunction.



If an ink cartridge in use is removed and is reinstalled, ink quantity will not be detected correctly since the counter to check ink consumption is cleared.



Because of the reasons above, make sure to return the printer to the user with a new ink cartridge installed.

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4.1.3 Screw Numbering System and Specifications

Table 4-2 lists the screws used in the EPSON Stylus Scan 2000 and Table 4-3 provides detailed screw specifications. During assembly and disassembly, make sure that the specified types of screws are used in the proper locations.

Table 4-2. Screw Numbering System

Name Size

+Bind, S-tight (CBS)

+Bind, P-tight (CBP)

+Pan head (CP) 3X4 +Bind, S-tight, Sems

R2(CBS Sems)

3X6

3X10

3X6

3X10

3X8

3X6

Table 4-3. Screw Types and Abbreviations

Top Side

1. Cross-recessed head

2. Slotted head

Head

1. Bind

2. Pan

(with Notch)

Body

1. Normal

2. S-tight

3. P-tight

Washer

(assembled)

1. Plain washer

2. Outside toothed lock washer

3. Spring washer

3. Cup

4. Truss

4. Tapping

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4.1.4 Service Checks After Repair

Before returning the printer after servicing, use the check list below, which enables you to keep record of servicing and shipping more efficiently.

Table 4-4. Inspection Checklist for the Stylus Scan

Category Component Item to check Is Check Required?

Printer unit

Self-test Is the operation normal? On-line test Was the on-line test successful? Print head Is ink ejected normally from all nozzles?

Does the carriage move smoothly?

Any abnormal noise during movement? Carriage mechanism

Paper feeding mechanism

Any dirt or obstacles around the shaft of gear

cover?

Is the CR motor at the correct temperature

(not over heating)?

Is paper fed smoothly?

Does paper get jammed?

Does paper skew during paper feeding?

Are papers multi fed?

Does the PF motor get overheated?

Any abnormal noise during paper feeding?

Is the paper path clear of all obstructions?

Checked / VNot necessary

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Table 4-4. Inspection Checklist for the Stylus Scan

Category Component Item to check Is Check Required?

Is the glass surface clean?

Does paper skew during loading or feeding Mechanism

Scanner unit

Carriage mechanism

Lamp

Local copy System

Adjustment Specified adjustment items Are adjusted conditions all right?

Lubricant Specified lubricated item

Printer ROM version Newest version:

Function

Scanner ROM version Newest version:

Any abnormal noise during movement?

Is the blue protective tape removed from over

the white strip?

Does the carriage move smoothly?

Any abnormal noise during movement?

Any dirt or obstacles around the shaft of gear

cover?

Is the CR motor at the correct temperature

(not over heating)?

Does the lamp turn on and suc cessfully perform

white-reflective test near home position?

Perform a color test of the local copy function.

Is the output quality satisfactory?

Is lubrication applied to the spe cified locations?

Is the quantity of lubrication adequate?

Checked / VNot necessary

Ink cartridges Are the ink cartridges installed correctly?

Shipping

Others Attached items Are all attached items from users included?

Pads on bottom Are all six pads attached? Protection conditions during

transport

Are all the pointed parts firmly fixed?

Checked / VNot necessary

Disassembly & Assembly Overview 75

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EPSON Stylus Scan 2000 Revision A

4.2 Disassembly Procedures

The flowchart below shows procedures for disassembly.

Start

Removal of the

housing

Removal of printer

consumables

Removal of the

circuit board tray

Removal of the

Scanner

Disassembly of the Printer Mechanism

Before disassembly, refer to the User’s Guide to perform these steps.

CR home

position

Front cover

assembly

Waste ink pads

B101 MAIN

Board

Scanner removal

Printhead

removal

Ink cartridge

removal

Rear cover

Cleaning assembly

B101 PSB/PSE

board

Upper frame

removal

PF motor

Power off &

unplug

Control panel

CR Motor

Upper cover

ASF removal

CR HP sensor

removal

Paper edge

sensor removal

Shaft removal

ASF home

position sensor

Paper feed

Disassembly & Assembly Disassembly Procedures 76

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4.2.1 Removing the Housing

4.2.1.1 Front cover assembly

1. Open the paper eject tray and the front cover. These two pieces are held in place by the left and right lower covers, so removing the right or left lower cover may cause the eject tray and front cover to drop.

3. Remove one screw (CBS 3x6) securing the left lower cover and one screw (CBS 3x6) securing the right lower cover.

Two Screws (CBS 3x6)

4. While supporting the paper eject tray and the front cover with your free hand, pull either of the lower covers out and down from the top (if necessary, lift the front of the Stylus Scan). This will free the paper eject tray and front cover so you can place them aside.

2. Gently insert a narrow tip screwdriver under the carriage from the center, and move the carriage lock toward you. Then move the carriage to the center.

Disassembly & Assembly Disassembly Procedures 77

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EPSON Stylus Scan 2000 Revision A

4.2.1.2 Rear cover

CHECK

PO INT

When reinstalling the front cover assembly, make sure the pegs at the bottom of the lower covers are visible through the holes in the waste ink tank. If some pegs are not visible, the pegs are bent and a lower cover has not been installed correctly.

Three sets of three pegs each.

1. Remove three screws (two x CBP 3x8 and one x CBS 3x6).

Two Screws

(CBP 3x8)

One screw

(CBS 3x6)

2. As shown below, evenly pull the rear cover down (#1) and out (#2) to remove it. (Try this over the edge of your desk if you have difficulty.)

Disassembly & Assembly Disassembly Procedures 78

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EPSON Stylus Scan 2000 Revision A

4.2.1.3 Control panel

1. Using a flat tip screwdriver or similar tool, gently push in the two hooks of the control panel while lifting up th e control panel.

NOTE: You may find that you can remove the control panel by

pushing in the hook on the right only, as shown below.

2. Remove the FFC from the control panel.

FFC

Disassembly & Assembly Disassembly Procedures 79

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EPSON Stylus Scan 2000 Revision A

4.2.1.4 Upper cover

NOTE: Before removing the upper cover, you may wish to remove

the control panel as described in the previous section. If you do not remove it first, keep in mind that you need to remove the control panel FFC during step 4 below.

1. Remove two screws from the front (CBS 3x6).

Scanner cover

Screws (CBS 3x6)

2. Remove two screws from the back (CBS 3x6).

3. Open the scanner cover, and pull the upper cover to the rear to remove its projection from under the scanner’s edge (black); then release so the upper cover is above the scanner’s edge.

4. Move the carriage back to the home position and lift up the upper cover and remove it.

Figure 4-1. Upper cover (from front)

Screws

(CBS 3x6)

Disassembly & Assembly Disassembly Procedures 80

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EPSON Stylus Scan 2000 Revision A

CHECK

PO INT

4.2.2 Removal of printer consumables

The printer consumables consist of the waste ink pads (described below) and cleaning assembly (described in “Removing the cleaning assembly (Pump and Cap)” on page 82).

4.2.2.1 Removing th e waste ink pads

1. Remove the front cover assembly as described in Section 4.2.1.1.

2. Remove one screw (CBP 3x8) securing the waste ink tank and which is located on the right side of the printer mechanism.

One CBP 3x8

screw

3. Remove the spacer on the left side of the tank and carefully pull the tank out and downward.

When re-installing the waste ink tank, make s ure to secur e the hooks on the left of the tank on top of the spacer. After replacing the waste ink pads, reset the waste ink counter.

4. Remove one screw (CBP 3x10) securing the waste ink tank cover, and then remove the cover by lifting up from the center.

5. Carefully remove the old waste ink pads so as not to get yourse lf or anyone/anything else dirty.

Spacer

Waste ink tank

Figure 4-3. Waste ink cover, pads, and tank

Figure 4-2. Removing the waste ink tank

Disassembly & Assembly Disassembly Procedures 81

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EPSON Stylus Scan 2000 Revision A

CHECK

PO INT

4.2.2.2 Removing the cleaning assembly (Pump and Cap)

1. Remove the front cover assembly as described in Section 4.2.1.1.

2. Remove the waste ink tank as described in Section 4.2.2.1.

3. Loosen two screws located on the edge of the paper eject frame assembly and float release the joints for the paper eject assembly and the side frames, as shown on the next page.

4. Raise the printer mechanism toward the ASF side so that you can see the bottom of the printer mechanism.

5. On the right side of the frame, remove the hook holding the cap assembly and release two protrusions attached to the frame. Lift up the right side of the cap assembly and take it out towards the bottom of the printer mechanism. Note that the cap assembly is still connected to the pump assembly by the ink tube at this point. (Refer to Figure 4-4 on the next page.)

6. Remove two screws (CBP 3x8) securing the pump assembly to the frame. (Refer to Figure 4-4 on the next page.)

7. Release a hook securing the pump assembly to the frame and remove the pump assembly, moving it toward the right. (Refer to Figure 4-4 on the next page.)



CAUTION

Do not damage the rubber part (black square) of the cap installed in the cap assembly. (If it gets damaged, it will not be able to adhere closely to the surface of the printhead, and may cause a malfunction in operation.



When you replacing the cleaner head built in the pump assembly, be careful of the following points.

- Do not touch the cleaner head with your bare hands. Use gloves or tweezers.

- Do not let oil or grease touch the head cleaner.

- When installing the cleaner head, set the rubber side (black side) toward the right side of the frame.



When installing the pump assembly, do not tighten the screw more than necessary torque.



When reassembling the cleaning assembly, refer to the figure below.



Since the spring is included among the gears in the pump assembly, be careful that the parts do not pop out during disassembly and assembly.



When assembling the printer, be careful not to crush nor leave any stress on the ink tube connecting the pump assembly and the cap assembly.



After installing the pump assembly, make sure that the cleaner parts move back and forth by rotating the gear

73.6.

Cleaner, Head

Gear arm

extension

Order of assembling

the pump parts.

Disassembly & Assembly Disassembly Procedures 82

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EPSON Stylus Scan 2000 Revision A

Step 3. Loosen the screws on the right and left sides of the

paper eject frame assembly.

Step 5. Release the hooks

from the right frame

assembly.

Pump Assembly

Cap Assembly

Step 6. Remove

two CBP 3x8

screws.

Step 7. Release the hook

from the back of the

printer mechanism and

pull out two protrusions

from the subframe.

Figure 4-4. Removing the Cap and Pump Assemblies

Disassembly & Assembly Disassembly Procedures 83

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EPSON Stylus Scan 2000 Revision A

CAUTION

CHECK

PO INT

4.2.3 Removing the Circuit Board Tray

Since the B101 MAIN and B101 PSB/PSE boards are built in a removable tray, remove the whole tray as described below to access these boards. Keep in mine that for many service operations you do not have to fully remove the tray, you can just pull it out far enough to remove the connectors.

1. Remove the rear cover and upper cover as described in “Rear cover” on page 78 and “Upper cover” on page 80.

2. As shown below, remove the three screws (CBS 3x6) on the back of the tray and one screw (CBS 3x6) on each side. (To remove the screw on the carriage-motor side, it is recommended you first remove the hand hold as this partially blocks access to the screw.)

3. Pull out the circuit board tray a little and carefully remove two plastic cable protectors from the cut-out sections on the back of the circuit board tray.

The plastic cable protectors are held in place when the tray is shut, but they can easily break or chip when removing or replacing the tray. Be careful not to twist or force the protectors.

When replacing the cables in the cable protectors, keep in mind the following.



The protectors have grooves on three sides and the side without a groove faces up.



The protectors slide halfway under the printer mechanism frame. If the protectors are not fully inserted under the frame, there will be a gap between the frame and the top edge of the circuit board tray.



It is a good idea to have an extra protector handy in case you accidentally break one.

4. Remove the connector cables and FFC cables as described below.

Total of five CBS 3x6 screws; three

on back and one on each side

Disassembly & Assembly Disassembly Procedures 84

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EPSON Stylus Scan 2000 Revision A



To the scanner: CN14, CN11, CN12, CN13 To the control panel: CN2

Red = Scanner

Blue = Control Panel



To the printer: CN4, CN5, CN6, CN7, CN8, CN9

5. After removing all of the cables, detach the circuit board tray completely from the printer mechanism.

Disassembly & Assembly Disassembly Procedures 85

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EPSON Stylus Scan 2000 Revision A

ADJUSTMENT

REQUIRED

4.2.3.1 Removing the B101 MAIN Board

Follow the steps in the previous section to remove (the covers and) the circuit board tray from the Stylus Scan. To remove the B101 MAIN Board from the tray, remove:



The cable (CN10) that connects to the power supply board



Seven (CBS 3x6) screws securing the board



Three (CBS 3x6) screws securing the interface connectors

CAUTION

To avoid short circuiting the Lithium battery, always put the MAIN board on a grounded pad or surface.

Ground

connector

MAIN Board

Power Supply

Board

Disassembly & Assembly Disassembly Procedures 86

Ground Screw for ground connector

Figure 4-5. Removal of the circuit boards

Be sure to perform the following adjustments when the MAIN Board is replaced;

1. Head voltage ID Input (Refer to Chapter 5.)

2. Bi-D adjustment (Refer to Chapter 5.) Also, replace the waste ink pads at this time.

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EPSON Stylus Scan 2000 Revision A

4.2.3.2 Removing the B101 PSB/PSE board

Follow the steps in Section 4.2.3 to remove (the covers and) the circuit board tray from the Stylus Scan. To remove the B101 PSE/PSB board from the tray, refer to Figure 4-5 in the previous section and remove:



The cable (CN10) that connects to the MAIN Board



The cable (CN1) that connects to the power cord



Four screws (CBS 3x6) securing the board



One screw (CBS 3x6) securing the ground

Disassembly & Assembly Disassembly Procedures 87

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4.2.4 Removing the Scanner Mechanism

1. Remove the housing as described in “Front cover assembly” on page 77, “Rear cover” on page 78, and “Upper cover” on page 80.

2. Remove the scanner cables from the cable clips as shown below.

Remove

the cables

from thes e

clips.

3. Slightly pull out the circuit board tray as described in “Removing the Circuit Board Tray” on page 84, and then remove the scanner-related cables from the B101 MAIN board as described in “Removing the B101 MAIN Board” on page 86.

4. Remove one ground screw (CBP 3x6) and three screws (CBP 3x6) securing the scanner.

Remove two

screws

(CBP 3x8)

One screw

(CBS 3x6)

Ground connector

and screw

(CBS 3x6)

5. Slide the scanner slightly toward the C R motor and pull up to remove.

Disassembly & Assembly Disassembly Procedures 88

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EPSON Stylus Scan 2000 Revision A

4.2.4.1 Removing th e glass surface

1. Open the scanner cover.

2. Push out the two hooks securing the glass surface and carefully remove the glass.

Push out these two hooks.

3. Carefully lift up the glass to remove it.

Disassembly & Assembly Disassembly Procedures 89

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EPSON Stylus Scan 2000 Revision A

CHECK

PO INT

Protective film

4.2.4.2 Removing the lamp

1. Remove the scanner as described in “Removing the Scanner Mechanism” on page 88.

2. Open the scanner unit and pull the cables free from the slot on the right side.

Pull out

these cables

from the

notch here.

3. Fully open the scanner cover and remove the right and left cover projections. Then remove two black screws (CBP 3x6) from the document path..

4. Lift up the document guide as shown below, and remove it.

When reinstalling the document guide, make sure the protective film slides under the forward rollers.

5. Lift from underneath both ends of the lamp assembly (lamp, cable, and lamp support) to remove it. The lamp ass e mbly snaps in and out.

6. Turn over the scanner mechanism so you can see the circuit boards. Pull the lamp cables out of the two black hooks and remove the lamp connector. Then pull out the cable and connector.

Lamp connector

Two black

Remove the cover

and two screws.

hooks

Disassembly & Assembly Disassembly Procedures 90

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EPSON Stylus Scan 2000 Revision A

CHECK

PO INT

4.2.4.3 Removing the ASF (p aper end) sensor

1. Remove the scanner as described in “Removing the Scanner Mechanism” on page 88.

2. Open the scanner cover and remove two screws (CBP 3x6).

Two screws

Notches on

sides of cover

3. Using a flat-tip screwdriver or similar tool, push out the sides of scanner cover’s sides so the cover comes free from the notches.

When replacing the scanner cover assembly, make sure you remove the blue protective tape that covers the standardwhite strip during ASP transport.

Blue Protective tape

The scanner performs a standard-white test during every initialization and if the blue protective tape is not removed, scanned output will appear like a 1950’s era 3-D movie without the glasses. In other words, blurry.

4. Remove three silver screws (CBP with flange 3x6) plus the grounding plate, one screw (CBP with flange 3x6), and two black screws (CBP 3x6) securing the ASF (paper end) sensor.

Remove three

Remove one screw

Two screws

5. Remove the sensor.

screws and

grounding plate.

Disassembly & Assembly Disassembly Procedures 91

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EPSON Stylus Scan 2000 Revision A

4.2.4.4 Removing th e scanner motor

1. Remove the scanner as described in “Removing the Scanner Mechanism” on page 88.

2. Cut the plastic clip securing the cables.

Motor

Cut this

clip.

3. Remove two screws (CBP 3x6 with plain washer).

cable

4.2.4.5 Removing th e upper frame

Removing the upper frame can make some procedures such as removing the printhead easier, but is not required.

1. Remove the upper cover as described in Section 4.2.1.4.

2. Remove the scanner as described in “Removing the Scanner Mechanism” on page 88.

3. If you have not already removed it, remove one screw (CBP 3x6) securing the carriage guard and then remove the guard. Also remove two screws (CBP 3x6) securing the upper frame on the left side.

When reinstalling

the gear

cover, insert

this knob

into the

upper hole.

Gear

cover

Then remove

these screws.

CHECK

PO INT

Remove two

screws.



Make sure the motor cable wraps around the back of the motor, as shown in step 2.



Replace the cables with a new plastic clip when reinstalling the scanner motor as shown in steps 2 and 3.

First remove this

screw and the

gear cover.

Disassembly & Assembly Disassembly Procedures 92

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EPSON Stylus Scan 2000 Revision A

CHECK

PO INT

4. Remove one screw (CBP 3x6) securing the upper frame on the right side.

Note: When

re-installing,

fit the frame

over this hook

and screw.

Remove this CBP

3x6 screw.

5. Turn the printer so you face the rear and remove two screws (CBP 3x6) as shown below.

6. Pull the front edge of the upper frame out and up to make sure it clears the carriage and then pull the upper frame straight up to remove it.

Be sure to keep the following in mind when re-installing the upper frame.



The frame extension on the CR motor side slides behind and to the right of the yellow lines below.



The highlighted area of the upper frame (below) hooks around the outside of the lower frame.

Remove two CBP 3x6

screws.

Disassembly & Assembly Disassembly Procedures 93

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EPSON Stylus Scan 2000 Revision A

CAUTION

ADJUSTMENT

REQUIRED

4.2.5 Disassembling the Printer Mechanism



This section explains procedures for disassembling the major parts or units of the printer mechanism.

4.2.5.1 Removing th e Printhead

1. Remove the upper cover as described in Section 4.2.1.4.

2. Remove the upper frame as described in “Removing the upper frame” on page 92.

Since the ink cartridge once taken out can not be used again, be sure to install a new ink cartridge when you return the printer to the user.



When you return the printer to the user, be sure to pack the printer for transportation with a new ink cartridge installed and the carriage in the home position when the printer is turned on.

3. Rotate the flat gear 73.6 towards yourself (front) to release the carriage lock mechanism. Then move the carriage to the left edge.

4. Fully open the blue plastic cover for the black ink cartridge and squeeze the bottom of the cover to release it from the ink cartridge holder. Turn it slightly so the knob at the end of the cover releases from the carriage.

5. Move the carriage to the HP and repeat for the color ink cartridge cover.

6. Remove the carriage FFC and FFC guide as shown in Figure 4-6 on the next page.

7. Remove the tension spring 49.

8. Remove one screw (CBP 3x6) and twist the fastener to pull it out the hole on the right side.

9. Remove the printhead from the carriage.



CHECK

PO INT

See Figure 4-7 on the next page to make sure that the grounding plate is installed correctly. (There are 2 pins to determine the location.)



When installing the printhead, make sure that the location pin on the carriage side is placed in the notch of the printhead. See Figure 4-7.

When you replace the printhead, perform the following adjustments (Refer to Chapter 5 for more details.):

1. Initial ink charge (Refer to Chapter 5/Section 5.2.2.3)

2. Head Voltage ID Input (Refer to Chapter 5/Section 5.2.2.7.)

3. Head Angular Adjustment (Refer to Chapter 5/Section

5.2.2.8.)

4. Bi-D Adjustment (Chapter 5 /Section 5.2.2.9)

Disassembly & Assembly Disassembly Procedures 94

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EPSON Stylus Scan 2000 Revision A

Step 9. Remove

the printhead.

Step 6.

Remove

the FFC

and FFC

guide.

Fastener

Step 8. Remove one CBP

3x6 screw

and the

fastener.

Make sure that

this pin is in the

cut-out section

of the printhead.

This part of the

grounding plate

should be

touching the CR

shaft receiver.

Make sure that

the carriage

knobs come

through these

holes.

Carriage Assembly

Step 7.

Remove the

tension spr ing

Note: There are no

actuators on the printhead.

located here.

Figure 4-6. Removing the Printhead

Nozzle Selector has been enclosed into head.

Figure 4-7. Installing the Printhead

Disassembly & Assembly Disassembly Procedures 95

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EPSON Stylus Scan 2000 Revision A

CHECK

PO INT

4.2.5.2 Removing th e PF Motor Assembly

1. Remove the housing as described in Section 4.2.1.1, Section 4.2.1.2, and Section 4.2.1.4.

2. Remove the waste ink tank as described in Section 4.2.2.1.

3. Remove an E-ring, a C-ring, and the following gears. (See Figure 4-8, "Removing the PF Motor Assembly" below for reference.)



Combination gear 12.4, 28



Gear 36



Gear 73.6

CAUTION

Spur gear

23.2

Combination gear 16,40.8

Spur gear 26.4

Gear 73.6 is a precision gear and you must replace the gear anytime you touch the teeth or bend it.

Gear 34

4. Remove the circuit board tray as described in “Removing the Circuit Board Tray” on page 84, and remove the PF motor cable from connector CN8.

5. Tilt the Stylus Scan so you can see the bottom and cut the plastic tie band that secures the PF motor cable.

6. Remove 3 hexagon nuts with the M3 wrench on the left side frame and slide the PF motor pinion gear toward the front of the Stylus Scan where you can remove it through the large hole.

When reinstalling the PF motor, keep the following in mind.



Be careful of the direction of the cable from the PF motor assembly.



Tie a plastic tie band around the PF motor cable; see step 5 above.



Be very careful of the grooves in the gears during disassembly and assembly.

Compression

Spring 0.9

Gear 73.6

Combination Gear 16, 21.6

Hexagon Nuts

Slide forward to remove

the PF Motor

Gear 36

E-Ring

Combination Gear

12.4, 28 with C-ring

Figure 4-8. Removing the PF Motor Assembly

Disassembly & Assembly Disassembly Procedures 96

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EPSON Stylus Scan 2000 Revision A

4.2.5.3 Removing the CR Motor Assembly

1. Remove the housing. (Refer to Section 4.2.1)

2. Pull out the circuit board tray as described in “Removing the Circuit Board Tray” on page 84, and disconnect the CR motor cable from CN7.

3. Rotate Gear 73.6 to release the carriage lock mechanism, and then move the carriage to the center.

4. Loosen the timing belt by pushing the driven pulley holder to the inside of the side frame, and remove the timing belt from the pulley on the CR motor.

5. Remove two screws (CBS 3x6) and remove the CR motor assembly.

CHECK

PO INT

When reinstalling the timing belt, make sure the driven pulley assembly fits tightly in the angled slots in the driven pulley holder. (Refer to Figure 4-9.)

Driven Pulley

Compression Spring 19.6

Assembly

Timing

Belt

Two CBS 3x6

screws

Connector

behind

frame

Make sure that protrusions of CR frame are in the holes of

frame when installing the CR motor assembly.

Figure 4-10. Removing and Installing the CR Motor Assembly

To the out s i de

of the frame

To the inside of

the frame

Driven Pulley

Holder

Figure 4-9. Removing the Timing Belt

Disassembly & Assembly Disassembly Procedures 97

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EPSON Stylus Scan 2000 Revision A

4.2.5.4 Removing the ASF Assembly

1. Remove the housing. (Refer to Section 4.2.1.)

2. Release the fixed hook from the inside of the printer mechanism and carefully but forcefully remove Gear 34 from the roller shaft in the ASF assembly.

3. Remove the cables from the cable hook on the printer mechanism and the hook on the ASF assembly.

4. Remove two screws (one CBS Sems R2 3x6 with p lain washer and one CR shaft installation screw).

5. With one hand move the paper depressor to the left and up, and with the other hand remove the ASF assembly, releasing the protrusion on the left side of the ASF assembly from the hole in the frame.



CHECK

PO INT

When installing the ASF assembly, make sure that the frame and ASF assembly are attached each other without any space between them.



Screws for ASF assembly should be used at the following positions. (Viewing from the back of the printer)

- Right: CR shaft installation screw

- Left: Screw (CBS, Sems R2; with a plain washer)

CBS Sems screw

with a washer

Make sure that the

protrusion in the ASF

Assembly are in these holes

on the frame when installing

the ASF assembly.

Move the paper

depressor up and

out of the way.

CR Shaft

Installation Screw

Gear 34

ASF

protrusion

Figure 4-11. Removing the ASF Assembly

Disassembly & Assembly Disassembly Procedures 98

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EPSON Stylus Scan 2000 Revision A

4.2.5.5 Disassembling the ASF Roller Assembly

1. Remove the ASF assembly. (Refer to Section 4.2.5.4.)

2. Remove the brake lever, releasing one leg of the torsion spring 41.2 from the hook of the ASF frame.

3. Remove the shaft-fixing bushing from the right side of the LD roller shaft and the release hopper lever.

Hopper Assembly

4. Move the left paper feed assembly to the center and remove the cam fixing bushing (white plastic) attached to the left side of LD roller shaft.

5. Push the LD roller shaft to the left and remove the left shaft fixing bushing after releasing its hook.

6. Holding the hopper assembly by hand, remove the cam part of hopper assembly from the right holes of ASF frame.

7. Holding the hopper assembly by hand, remove the cam part of hopper assembly from the right holes of ASF frame.

See the next section for details on disassembling the paper-feed roller assemblies.



CHECK

PO INT

During disassembly and assembly of the hopper assembly, do not let grease from the cam parts touch an y other parts. Wipe off any grease transferred to other parts.



Be careful of the direction of the hopper lever release when installing it.



Make sure that the right and left shaft-fixing bushings are fully installed and do not slip off.



During assembly, attach the cam fixing bushing after installing the LD roller shaft to the ASF frame.



When installing the right and left paper feed roller assemblies to the LD roller shaft, the black paper feed roller assembly goes on the right side and the standard EPSON color one goes on the left side.

Brake Lever

Left Shaft

Fixing

Cam Fixing

Bushing

(EPSON standard

color side)

Paper Feed Roller

Assemblies

Torsion Spring

41.2

(Black

side)

LD Roller Shaft

ASF Frame

Release

Hopper

Lever

Right Shaft Fixi

Bushing

Figure 4-12. Disassembly of ASF Assembly

Disassembly & Assembly Disassembly Procedures 99

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EPSON Stylus Scan 2000 Revision A

4.2.5.5.1 Removing the Right and Left LD Roller Assemblies

1. Disassemble the ASF assembly and remove the paper feed roller assembly and hopper assembly from the ASF assembly. (Refer to Section 4.2.5.4.)

2. Take out the right and left compression springs 1.66 from the back of the hopper assembly.

3. Pull out the cam part of the hopper assembly from the hole located on the frame of the right LD roller assembly,

4. Pull out the LD roller shaft. The paper feed roller assembly and hopper assembly should be disconnected by now.

5. Release the hook of LD roller assembly at the shaft hole of the paper feed roller assembly. Also, release the fixed hook of the cover roller LD and remove the LD roller assembly.



CHECK

PO INT

When installing the LD roller assembly, make sure that the hooks are hung on the paper feed assembly.



During assembly, when setting the compression spring

1.66 to the spring installation position in the paper feed assembly, hang both ends of the spring on the hooks temporarily. Also, do not forget to release the hooks of these springs from the holes located on the back of paper feed assembly by rotating the spring. (Refer to the figure below.)

LD Roller Cover (Right and Left)

Paper Feed Holder

Sheet

LD Roller Assembly

(Right and Left)

Paper Feed Assembly

(Right and Left)

During assembly, set the compression

spring 1.66 so that both ends are

compressed behind the hooks as shown

here. Then release the hooks once installed.

Compression Spring 1.66

Figure 4-13. Disassembly of Paper Feed Roller Assembly

Disassembly & Assembly Disassembly Procedures 100

Epson Stylus Scan 2000 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

PRODUCT DESCRIPTION

1.1 Features

1.2 General Specifications

1.2.1 Local copy

1.2.2 Scan area

1.2.3 Print area

1.2.4 Printer

1.2.5 Scanner

1.2.6 Common

1.3 Interfaces

1.3.1 Printer interface

1.3.2 Scanner interfaces

1.4 Control Panel

1.4.1 Buttons

1.4.2 Control panel indicates the printer’s condition

1.4.3 Initialization

1.5 Stylus Scan Errors

1.6 Physical Characteristics

1.6.1 Dimensions

1.6.2 Weight

1.6.3 External view

OPERATING PRINCIPLES

2.1 General

2.2 Printer Mechanism Operation

2.2.1 Printing Mechanism

2.2.2 Printing Process

2.2.3 Carriage Mechanism

2.2.4 Paper Feeding Mechanism

2.2.5 Ink System

2.2.6 Pump, Carriage Lock, Head Cleaner Mechanism

2.3 Scanner Mechanism Operation

2.3.1 Mechanism

2.4 Local and PC-Centric Copy Principles

2.4.1 Local copy process

2.4.2 PC-Centric copy process

2.5 Electrical Circuit Operating Principles

2.5.1 B101 PSB/PSE Board

2.5.2 B101 MAIN Board

TROUBLESHOOTING

3.1 Unit Level Troubleshooting

3.1.1 Printer/Scanner does not operate at power on

3.1.2 Error is detected

3.1.3 Failure occurs during printing

3.1.4 Printer does not feed paper correctly

3.1.5 Control panel operation is abnormal

3.2 Repair of the Printer Mechanism

3.3 Troubleshooting the Scanner

3.3.1 Scanner Troubleshooting Flowcharts

3.3.2 Scanner troubleshooting check points

3.4 Troubleshooting the Motors and Sensors

DISASSEMBLY & ASSEMBLY

4.1 Overview

Precautions for Disassembling the Printer

4.1.2 Tools

4.1.3 Screw Numbering System and Specifications

4.1.4 Service Checks After Repair

4.2 Disassembly Procedures

4.2.1 Removing the Housing

4.2.2 Removal of printer consumables

4.2.3 Removing the Circuit Board Tray

4.2.4 Removing the Scanner Mechanism

4.2.5 Disassembling the Printer Mechanism