Epson Scan 2500 User Manual

Download

SERVICE MANUAL

All-in-one printer, scanner, and copier

EPSON STYLUS Scan 2500

SEIJ99007

EPSON STYLUS Scan 2500 Revision A

Notice:



electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION. The contents of this manual are subject to change without notice.



All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be de tected, SEIKO EP SON



would greatly appreciate being inform ed of them. The above not withstanding SEIKO EPSON CORPORATION can assume no responsibility for any errors in this manual or the consequences



thereof.

EPSON is a registered trademark of SEIKO EPSON CORPORATION.

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

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

EPSON STYLUS Scan 2500 Revision A

PRECAUTIONS

There are caut io nary notes throughout the text to help you avoid personal injury or equipment damage.

W ARNING

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

Always observe the measures listed below when performing repair or maintenance procedures.

CAUTION

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

WARNING

1. Always disconnect the product from both the power source and host computer before performing any maintenance or repair procedure.

2. No work should be performed on the unit by persons unfamiliar with basic safety measures dictated for all electronics technicians in their line of work.

3. In performing testing described in 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 the power supply and other electronic components.

CAUTION

1. Repairs on E PSON products should be performed only by an EPSON-certified repair technician.

2. Make certain that the source voltage is the same as the rated voltage listed on the serial number/rating plate. If the EPSON product has a primary AC rating different from the 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 befor e rem o ving or replacing printed circuit boards and/or individual chips.

4. To protect sensitive microprocessors and circuitry, use static discharge equipment, such as anti-static wrist straps, when accessing internal components.

5. Replace malfunctioning components only with those components recommended by the manufacturer; introduction of second-source ICs or other nonapproved components may damage the product and void any applicable EPSON warranty.

EPSON STYLUS Scan 2500 Revision A

PREFACE

This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPSON STYLUS Scan 2500. The instructions and procedures included herein are intended for the experienced repair technicians, and attention should be given to the precautions on the preceding page. The chapters are organized as follows:

CHAPTER 1. “Prod uct Description”

Provides a gener al ov ervie w and specif icat ion s of the pro duc t.

CHAPTE R 2. “Operating Princ ip les”

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 ass em bling the product.

CHAPTER 5. “Adjustm ent”

Provides Epson-approved methods for adjustment.

CHAPTER 6. “Maintenance”

Provides prevent i ve m aintenance pro c edu re s and th e list s of Epsonapproved 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

EPSON STYLUS Scan 2500 Revision A

Revision St at us

Revision Issued Date Description

Revision A October 5, 1999 First release

EPSON STYLUS Scan 2500 Revision A

Contents

Product Description

Features....................................................................................................... 10

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

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

Scan area................................................................................................ 11

Print area................................................................................................ 12

Printing................................................................................................... 13

Input data buffer.................................................................................... 13

Control codes......................................................................................... 13

Paper feed.............................................................................................. 13

Paper....................................................................................................... 14

Ink ........................................................................................................... 15

Scanner........................................................................................................ 16

Common...................................................................................................... 17

Electrical specifications......................................................................... 17

Safety, E MC..... ......... .......... .................................................................... 18

Environmental conditions..................................................................... 18

Resistance to electric noise .................................................................. 19

Reliability................................................................................................ 19

Acoustic noise........................................................................................ 19

Interfaces..................................................................................................... 20

Printer In te rface........................ ............................................................. 20

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

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

Buttons................................................................................................... 24

Indicators and LCD Display................................................................... 27

Initialization............................................................................................ 28

Settings Menu ............................................................................................. 29

Stylus Scan Errors...................................................................................... 30

Options........................................................................................................ 31

Local Copy.............................................................................................. 31

Scanning................................................................................................ 31

Physical Ch a r acteristics ............ ......... .......... ......... .......... ........................... 32

Dimensions............................................................................................ 32

Weight.................................................................................................... 32

Operating Principles

General........................................................................................................ 34

Printer Mechanism Operation................................................................... 34

Printing Mechanism.............................................................................. 35

Printing Process..................................................................................... 37

Carriage Mechanism and Motor .......................................................... 38

Paper Feeding Mechani sm................ .......... .......................... ............... 40

Ink System ............................................................................................. 46

Pump, Carriage Lock, Head Cleaner Mechanism................................ 46

Cap Mechanism...... ......... ........................................... ........................... 49

Scanner Principles...................................................................................... 50

Carriage Unit.......................................................................................... 50

Carriage Operation................................................................................ 51

Local and PC Copy Principles.................................................................... 52

Local copy process................................................................................ 52

PC copy process .................................................................................... 53

Electrical Circuit Operating Principles ...................................................... 54

B102 PSB/PSE Board............................................................................. 55

B102 MAIN Board................. .......................................... ....................... 57

Troubleshooting

Unit Level Troubleshooting....................................................................... 61

Printer/Scanner does not operate at power on................................... 62

Error is detected.................................................................................... 63

Failure occurs during printing........... .......... ......... .......................... ...... 63

Printer does not feed paper corr ectly .................................................. 64

Control pa nel operation is abnorm a l................. ......... .......... ......... ...... 64

EPSON STYLUS Scan 2500 Revision A

Printer Related T roubleshooting............... ..... .............. .............. ..... .......... 6 5

Scanner Troubleshooting.......................................................................... 69

Troubleshooting Motors and Sensors...................................................... 73

Disassembly & Assembly

Overview..................................................................................................... 75

Precautions for Disassembling the Printer.......................................... 75

Tools....................................................................................................... 77

Specification for Screws ....................................................................... 77

Service Checks After Repair............ .... .... ......... .... .... . .... .... ......... .... . .... . 79

Disassembly Procedures............................................................................ 81

Removing the Housing............................................................................... 82

Removing the rear cover ...................................................................... 82

Removing the top cover........................................................................ 83

Removing the control panel assembly ................................................ 83

Removing the side covers.................................................................... 84

Removing the scanner support frame ................................................. 84

Removing the paper eject assembly.................................................... 85

Removing the power supply board upper frame ............................... 86

Removal of the B102 PSB/PSE Board.................................................. 87

Removing the printer mechanism ....................................................... 88

Removal of the Circuit Board Tray ............................................................ 90

Removal of the Printer Consumables ....................................................... 91

Removing the waste ink pads .............................................................. 92

Removing the cleaning assembly (Pump and Cap)............................ 93

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

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

Removing the PF Motor Assembly ...................................................... 97

Removing the CR Motor Assembly...................................................... 98

Removing the ASF Assembly............................................................... 99

Removing the Carriage Assembly ..................................................... 103

Removing the PF Roller Assembly..................................................... 105

Removing the PE Paper Detector Assembly ..................................... 107

Removing the HP Detector ................................................................. 108

Disassembly of the Scanner Mechanism ............................................... 108

Removing the scanner........................................................................ 109

Removing the scanner motor............................................................. 111

Adjustment

Required Adjus tmen t s......... .......... .......................................................... 113

Adjustment Tools Required................................................................ 114

Printer Adjustment................................................................................... 114

Printer hardware adjustments............................................................ 114

Using the Service-Adjustment Program................................................. 116

Installing the program ........................................................................ 116

Openning the Start-up menu ............................................................. 117

Initial Ink Charge Operation................................................................ 122

Bi-D Adjustment.................................................................................. 122

Head Cleaning Operation ................................................................... 123

Head Voltage ID Input......................................................................... 124

Head Angular Adjustment.................................................................. 124

Ink draining.......................................................................................... 126

Scanner Adjustment................................................................................. 126

Maintenance

Overview................................................................................................... 129

Cleaning............................................................................................... 129

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

Appendix

Connector.................................................................................................. 141

Board Connector Summary................................................................ 142

Connector Pin Assignment................................................................. 143

EEPROM Address Map............................................................................. 146

Exploded Diagrams.................................................................................. 152

Parts List.................................................................................................... 162

Component Layouts................................................................................. 167

Circuit Diagrams....................................................................................... 172

PRODUCT DESCRIPTION

CHAPTER

EPSON Stylus Scan 2500 Revision A

1.1 Features

The following specifications apply to the EPSON Stylus Scan 2500.

High qu ality local copy Three color copy modes Normal, Fine, and Photo “Photo quality copy by Photo paper” enabled Two B/W copy modes Normal, Fine

High speed local copy Normal B/W copy mode Max. 2.4 PPM (using “Memo” pattern) Normal color copy mode Max. 1.2 PPM (using “DTP” pattern)

Local copy settings from the control panel Enlargement 50~200% Multiple copies 1~20 copies Brightness -2 ~ 2 (five steps) Copy size protection Letter/Half Letter/5 x 8”

A4/B5/A6 (Copy size protection prevents the printhead from firing ink onto the platen in cases where the paper size loaded in the printer does not match the selected paper size.)

PC Copy settings (determined from software application) Auto Photo Fine Auto Enlarge Auto Layout Background reduction

Installed functions are the same as or equival ent to the EPSON Stylus Color 740 and the GT-7000.

Small footprint 212 x 517 x 414 mm (HWD) m ac hine only

300 x 517 x 575 mm (HWD) parts extended

1.2 General Specifications

1.2.1 Local copy

1. Local copy

Table 1-1. Local Copy Specifications

Mode

Normal 300x300 Gray 360x360 Off Normal Bi-D Normal

B/W

Fine 600x300 Gray 720x720 On Variable Bi-D Normal

Normal 300x300

Color

Fine 600x600

Photo 600x600

Output mode = data from the scanner ASIC to the printer

Scan

res.

2. Enlargement: Default 100%

3. Brightness -2 (Darkest) ~ 0 (Default) ~ +2 (Lighte st) ( increments of one)

4. Multiple Copies 1~20 copies (one page at a time when using the ADF)

5. Copy size Max. copy size 216 x 297mm (8.5 x 11.7inches)

Output

mode

Full

color

Full

color

Full

color

res.

360x360 Off Normal Bi-D Normal

720x720 On Variable Bi-D Normal

720x720 On Vari able Uni-D Photo

Micro

Weave

Dot Size

Head

seq.

Enlargement 120, 141, 200% Reduction 50, 70, 80, 93% (not continuous)

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

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

Letter/Half Letter/5x8” (Letter size version)

Media

Product Description Features 10

EPSON Stylus Scan 2500 Revision A

6. Printing paper size Normal paper A4/Letter/A5/Executive Half letter/B5/A6/Index card 5x8”/8 x10”/Post card/Legal

Photo paper A4/ Letter/4x5”/Post card

1.2.2 Scan area

Starting scan

position (1st bit)

Scanning Area

Document

edge (scale

edge)

Document

size

A4 210mm 297mm

Letter 216mm 279mm

(width)PL(length)

Table 1-2. Scan Area

(left)

at least

3mm

at least

3mm

(right)

at least

3mm

at least

3mm

(top)

at least

3mm

at least

3mm

(bottom)

at least

3mm

at least

3mm

Figure 1-1. Scan Area

Product Description General Specifications 11

EPSON Stylus Scan 2500 Revision A

1.2.3 Print area

Paper feed direction

Printable Area

Table 1-3. Print Area

Document 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 12

EPSON Stylus Scan 2500 Revision A

1.2.4 Printing

Print method Drop On Demand ink jet

Nozzle configuration monochrome 144 nozzles (48 x 3 staggered)

color 48 nozzles each (cyan, m agenta, yellow)

Print direction Bi-direction with lo gi c seeking

Print speed & printable columns

Table 1-4. Character code

Character pitch Printable columns LQ speed

10 CPI (Pica) 80 200 CPS

Table 1-5. Raster Graphics 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

1.2.5 Input data buffer

1.2.6 Control codes

ESC/P Raster Epson Remote Command

1.2.7 Paper feed

1. Feeding method Friction feed with ASF

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

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

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

4.5 inch/sec. fast/continuous

64Kbytes

Product Description General Specifications 13

EPSON Stylus Scan 2500 Revision A

1.2.8 Pape r

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

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 suppor ted at n ormal

temperature.

Envelopes

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

thickness: 0.16~0.52mm (0.006~0.02”)

~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”)

Printable Area

Figure 1-3. Printable Area for Envelopes

Envelope printing is only supported at normal temperature.

Load long edge first.

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 m m (0.12”) 3 mm (0.12”) 3 mm (0.12”) 14 mm (0.55”)

Left Margin

(min.)

Right Margin

(min.)

Top Margin

(min.)

Bottom Margin

(min.)

weight: 45g/m

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

quality: Plain paper, bond paper, Air mail

Index cards

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

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”)

thickness: less than 0.23mm (0.0091”)

Product Description General Specifications 14

EPSON Stylus Scan 2500 Revision A

38.5

42.9

52.7

1.2.9 Ink

1. Ink cartridge (black) Type: Exclusive cartridge Color: Black Print capacity: 900 pages/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°)

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°)

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

38.5

Figure 1-5. Color Ink Cartridge

Figure 1-4. Black Ink Cartridge

NOTE: Ink cartridges are consumable prod ucts and cannot by any

means be refilled. Do not use cartridges that have passed their expiration d ate. Ink will freeze at less than -4°C but can be used after thawing for three hours at room temperature.

Product Description General Specifications 15

EPSON Stylus Scan 2500 Revision A

1.3 Scanner

Product type Flat-bed color image scanner Sub scan method Movement of scan head Photoelectric device Color CCD line sensor Max. scan area 8.5 x 11.7” (216 x 297mm) Max. effective pixels 5100 x 7020 pixels (600dpi) Scan resolution main = 600dpi

sub = 1200dpi

Output resolution 50~4800 dpi (1dpi increments)

(4800 dpi at 200% reaches the limitation of maximum 16,368 pixels at 9600 dpi for main scan)

Scan speed (600dpi, Draft mode)

Color = 8.1msec/line

Monochrome (bi-level) = 2.7msec/line Color separation By the CCD color filter Command level ESC/I - B7 Zoom 50~200% (1% increments)

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 Option TPU (for GT-7000)

ADF (for GT-7000)

Pixel depth 8 bits/pixel/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

Product Description Scanner 16

EPSON Stylus Scan 2500 Revision A

1.4 Common

1.4.1 Electrical specifications

Rated voltage AC 100~120V

AC 220~240V

Input voltage AC 100~120V

AC 220~240V ±10%

Rated current 0.7A (AC 100~120V

0.4A (AC 220~240V ±10% model) Rated frequency range 50~60 Hz Input frequency range 49.5~60.5 Hz Power consumption Approx. 32W during Local-copy printing

Ω

Insulation resistance 10M

Dialectic strength AC 1.5kV, 1min

at 500V DC

(between AC line and chassis)

±10%

±10% model)

1.4.2 Safety , EMC

Safety UL1950 (UL)

CSA C22.2 No. 950 (CSA) EN60950 (VDE) IEC950 (ROSTEST, PSB)

EMC FCC Part15 Subpart B Class B

CSA C108.8 Class B AS/NZS3548 Class B CISPR Pub22 Class B CNS13438 Class B

CE Marking

Low voltage directive 73/23/EEC EN60950 EMC Directive 89/336/EEC EN55022 Class B

EN61000-3-2 EN61000-3-3 EN50082-1 IEC 801-2/801-3/801-4

Product Description Common 17

EPSON Stylus Scan 2500 Revision A

1.4.3 Environmental conditions

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

-20~60°C (non-operatin g, 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)

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

2 G, within two ms (non-operating, in packaging)

Resistance to vibration 0.15G (operating)

0.50G (non-operating, in packaging)

80 70

Humidity (%)

40 30

1.4.4 Resistance to electric noise

Static electricity panel - 10kV

metal - 7kV/150pF, 150

Ω

1.4.5 Reliability

Total print volume 60,000 pages (A4, Letter) Printhead life 4 billion dots/nozzle Scan head MCBF 30,000 cycles

1.4.6 Acoustic noise

Level Approx. 46 dB (local copy with no ADF)

Approx. 50 dB (local copy with ADF) (According to ISO7779)

10 27 30 35 4020

Temperature (°C)

Figure 1-6. Humidity and Temperature

Product Description Common 18

EPSON Stylus Scan 2500 Revision A

1.5 Interfaces

This section is divided into printer and scanner interface specifications. See the following section for printer interface details or see “Scanner interfaces” on pag e22 for scanner interface details.

1.5.1 Printer Interface

PARALLEL

BUSY signal is set h i g h b e fore setting either -ERROR low or P E hig h , and held high until all these signals return to th eir inactive state.

BUSY signal is at high level in the following cases:

During data entry (see data transmission timing)

When input data buffer is full

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

During printer error (see -ERROR signal)

When the parallel interface is not selected

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

Printer hardware error (fatal error)

Paper-out error

Paper-jam error

Ink-out error

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

1. Specification

Packet Refer to the IEEE-1284 Standard for Data Delivery

and Logical Channels for IEEE Std. 1284.4 Interface (Draft D1.50)

Refer to the IEEE-1284 specification 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

Refer to the IEEE-1284 specification

3. Data transmission timing

Refer to the IEEE-1284 specification

4. Extensibility Request:

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

00H Request nibble mode reverse channel transfer

04H Request Device ID;

Return data using nibble mode reverse channel transfer

Device ID:

The printer sends the following device ID string when requested.

IEEE 1284.4 is enabled,

[00H][5EH] MFG:EPSON; CMD:ESCPL2,BDC,D4,SPC; MDL:Stylus[SP]Scan[SP]2500; CLS:PRINTER DES:EPSON[SP]Stylus[SP]Scan[SP]2500;

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

(2)MDL value depends on the EEPROM setting.

Transmission mode 8 bit parallel, IEEE-1284 compatibility/nibble mode Synchronization Refer to the IEEE-1284 specification Handshaking Refer to the IEEE-1284 specification

Product Description Interfaces 19

EPSON Stylus Scan 2500 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 1-7. USB Confi guration

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-OUT OF HOSTS

Generally, hosts abandon data transfer to peripherals when a peripheral is continuously in the busy state for dozens of seconds. 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.

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 the idle state, the parallel interface goes into the ready state. Be aware that an interrupt signal such as the -INIT sig nal only takes affect on the parallel interface when the parallel interface is selected.

Pin #4Pin #3

Figure 1-7. USB Pin Configuration

Product Description Interfaces 20

EPSON Stylus Scan 2500 Revision A

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 point-to-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 communi c ation and data that received it by the time it is able to take synchronization by magic string (1284.4 synchronous comm ands) is d i s carded.

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

1.5.2 Scanner interfaces

PARALLEL

1. Specification Transmission mode 8 bit parallel, IEEE-1284 compatibility/nibble mode Synchronization Refer to the IEEE-1284 specification Handshaking Refer to the IEEE-1284 specification Packet Refer to the IEEE-1284 Standard for Data Delivery

and Logical Channels for IEEE Std. 1284.4 Interface (Draft D1.50)

Refer to the IEEE-1284 specification 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

Refer to the IEEE-1284 specification

3. Data transmission timing

Refer to the IEEE-1284 specification

Product Description Interfaces 21

EPSON Stylus Scan 2500 Revision A



USB

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

Any items not included in this manual and/or the user’s guide shall be in

scanner does not support vendor specific requests.

compliance with the Universal Serial Bus Specification Revision 1.0



Configuration - the scanner supports the following configurations

Table 1-8. Scanner Configuration for USB

Element Description

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

Device

Configuration

Protocol: Vendor-specific Vendor ID: 0x04B8 (Seiko Epson Corp.) Product ID: 0x0106 Number of possible configurations: 1

Num ber of int e rfaces supported by th i s c onfiguration: 1 Characteristi cs : Self-powered ( Rem ote w ake- up feature not

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

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

Interface

Endpoint

String Descriptor

endpoint 0):2 Class: Vendor specif ic

Subclass: Vendor speci fic Protocol: Vendor specific

Bulk IN transfer Max. da ta tran sfer size : 6 4 byte s

Bulk OUT transfer Max. da ta tran sfer size : 6 4 byte s

Language ID: English, US 1: iManufacturer “EPSON” 2: iProduct “Scanner Stylus Scan 2500”

Product Description Interfaces 22

EPSON Stylus Scan 2500 Revision A

1.6 Control Panel

Load/

Print out Size

Eject

Cleaner

Scan

button

1.6.1 Buttons

Table 1-9. Button functions

Button Function

Load/Eject

(pushed within

two* seconds)

Load/Eject

(pushed for two*

seconds)

Cleaning

(pushed for two*

seconds)

Cleaning

(pushed within

two* seconds)

• Loads or ejects paper

• I f the carriage is at the ink car tridge in stallation p osition, returns the carriage back to the home position.

• Starts the ink cartridge replacement sequence (not available during printing. Shifts the carria ge to the ink cartridg e replacement position.

• Starts the printhead cleaning cycle.

• If the printer is in the “Ink Low” or “Ink Out” or “No Ink Cartridge” condition, starts the ink cartridge replacement sequence.

• If the carriage is at the ink cartridge replacement position, returns the carriage f ro m the in k cartrid ge re placement position to the home position.

button

Darker/

Lighter

Reduce/

Enlarge

Quality

button

Copies

LCD Panel

Hold for

Return

Item

B&W/Color

button

Figure 1-8. Control Panel

Button Function

Load/Eject

Cleaning

Button Function

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

Cleaning

(hold for ten

seconds)

Copy

button

Stop/Clear

button

Error

indicator

Operate

indicator

Table 1-10. Power-on functions

Prints a sta tus sheet that includes fi rmware ver s ion, 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, normal initialization begins.

Table 1-11. Special settings mode

Resets the waste ink overflow counter

* The user’s guide states three seconds.

Product Description Control Panel 23

EPSON Stylus Scan 2500 Revision A

Warm up

COPY BUTTON

Before performing a local-copy operation, you should understand how the LCD and control panel buttons work. The LCD displays:



Copy status



Copy settings



Stylus Scan error messages and maintenance status



Miscellaneous settings not directly related to copying

1. Copy status While waiting for a copy job, the current copy settings are displayed.

Example: (default)

LCD

Button

100% B&W Normal 1

Reduce/

Quality

Enlarge

B&W/

Color

Number of

copies

Figure 1-9. LCD and Button Relationship

2. Copy settings Allows you to make the following copy settings.



Quality

3. Status Displays the current Stylus Scan condition. Example:

Scanner lamp is warming up

4. Miscellaneous settings Allows users to print or change the following Demo pattern Status sheet Bottom margin

Paper size category (metric or US) Language code Set factory default

Table 1-12. Copy button functions

Button Function Notes

Operate

Stop/Clear

Copy

B&W/Color

• Sets Local Copy Mode as the default; same as printer reset.

• Stops the current copy job and ejects the paper during copying.

• Clears number of copies setting (returns to “1”)

• Clears settings and returns settings to their default values.

• Starts copying (default =

• Selects Color copy or Black & white copy

B & W 100% Normal 1)



Reduce/Enlarge



Paper size



Brightness



Number of copies

Product Description Control Panel 24

EPSON Stylus Scan 2500 Revision A

Table 1-12. Copy button functions (cont.)

Button Function Notes

Sets copy quality

•B&W

Normal

Fine

Quality

Multiple

copies

Enlarge/

Reduce

Printout Size

• Color

Normal

Fine Photo

Note: When Photo is s electe d, the LCD displ ays “ Load Photo Paper”.

•B&W

-20

• Color

-20

Increments by “1”, and increment speed increases if held for more than one second.

• 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 onl y (100%) activated (default) Second or more time = cycles through the following.

93% > 80% > 70% > 50% 200% > 141% > 120%

Sets the size of the printed paper during Local Copy mode; A size area = A4 Letter size area = Letter

/B5/A6

/Half Letter /5x8”

Resets to 1 if Stop/ Clear button is pressed.

Table 1-13. Settings Menu

Button Function LCD

Hold Quality + B&W buttons

Quality B&W/ Color

Copies +/-

Copy

Change modes Copy<-> Settings Menu

Change menu in Settings Menu mode

Executes menu or selects item

for three seconds

Menu Mode

After two seconds

BottomMargin:14/3mm

Cycles through the menus below:

BottomMargin:14/3mm

PaperSize: Metric/US

Lang: Eng Ger Fr Ital Span

Set Factory Default

Status Sheet Print

Lang: Eng Ger Fr Ital Span

Press copy to change to next

Lang: Eng Ger Fr Ital Span

Port

Brightness

Sets the brightness level from -2>0 of “1”.

>+2 in increments

Product Description Control Panel 25

EPSON Stylus Scan 2500 Revision A

1.6.2 Indicators and LCD Display

Table 1-14. LCD display and LED indicators

Scanner

Status

Scanner fatal error

Printer fatal error

Maintenance reque s t (waste ink pads full)

ADF paper jam S - On ADF Jam Printer paper

jam ADF cover

open Printer paper

out Black Ink end/

No ink cartridge

Color Ink end/ No ink cartridge

Ink ca r t r idge change mode

Maintenance cover open

Black ink level low

Printer

Copy

S - On Scanner Error

P - On Printer Error

P - On Call Service

P - Flashing Printer Jam

S - Flashing ADF Cover Open

P - Flashing Printer Paper Out

P - Flashing Black Ink Out

P - Flashing Color Ink Out

P Flashing - Replace Cartridge

S Flashing - Maint. Cover Open

P- -

Indicators

Display message

Operate Error

Black Ink Low (displays alternately with regular message)

Table 1-14. LCD display and LED indicators (cont.)

Scanner

Status

Color In k level low

Scanner lamp warming up

Ink ch arging P Flashing - Warm Up

Scanning S F la s hing -

Printing P Flashing -

Copying C Flashing -

Power on (all) On -

Initialize EEPROM and reset timer IC

This order of items in this table is from high to low priority. “-” = no change/does not matter

Printer

Copy

P- -

S Flashing - Warm Up

P - - EEPROM Reset

Indicators

Display message

Operate Error

Color Ink Low (displays alternately with regular message)

Scanning [xxx] (xxx=I/F)

Printing [xxx] (xxx=I/F)

Following messages alternate:

A message = (current copy settings)

B message = Now Copying x/y (x=current document number, y = total number of copies)

Power on (for two seconds and then changes to Copy Mode (default))

Product Description Control Panel 26

EPSON Stylus Scan 2500 Revision A

1.6.3 Initialization

PRINTER INITIALIZATION

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 actions are performed.

Initialize printer mechanism



Clear input data buffer



Clear print buffer



Set default values



2. Operator initialization The printer initializes when turned on within ten seconds of being turned

off, or when the printer recognizes the -INIT signal (negative pulse) from the parallel interface. When the printer initializes, the following actions are performed.

Cap the printhead



Operation

Power on Valid Valid

Panel Reset

Initialize by command

STOP Valid -

CLEAR - Valid

Operat

Valid Valid

StandbyController

ing

Table 1-15. 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

Eject paper



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 actions are performed.

Clear print buffer



Set default values



Product Description Control Panel 27

EPSON Stylus Scan 2500 Revision A

SCANNER INITIALIZATION

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.

1.7 Settings Menu

Enter the settings menu mode by holding down the Quality and B&W/Color buttons. Settings are saved when the power is turned off.

Table 1-16. Settings Menu

Button Function LCD

Hold Quality + B&W buttons for three

Quality B&W/ Color

Copies +/-

Copy

Change modes Copy<-> Settings Menu

Change menu in Settings Menu mode

Executes menu or selects item

seconds

Menu Mode

After two seconds

BottomMargin:14/3mm

Cycles through the menus below:

BottomMargin:14/3mm

PaperSize:Metric/US

Lang:Eng Ger Fr Ital Span Port

Set Factory Default

Status Sheet Print

Lang: Eng Ger Fr Ital Span Port

Press copy to change to next

Lang: Ger Fr Ital Span Port Eng

Clear input/output data buffer



Set default values



Product Description Settings Menu 28

EPSON Stylus Scan 2500 Revision A

MENUS

1. Bottom Margin Determines the default bottom margin of 14mm or 3mm.

2. Paper Size category Determines which paper size category is enabled; metric or US Metric = A4/B5/A6 US = Letter/Half Letter/5x8”

3. Language Determines which language is us ed to display LC D mes sa ges; English/German/French/Italian/Spanish /P o rtuguese

4. Set Factory Default Determines parameters for factory default settings. Factory default settings:

Copy mode = Refer to “Buttons” on pag e24

Settings Menu mode = 14mm bottom margin The Paper Size and Language parameters are saved as defaults when power is turned off.

5. Status sheet Prints the following settings: Bottom margin Paper size category Language

1.8 Stylus Scan Errors

PRINTER-SPECIFIC ERRORS

Table 1-17. Printer-SPECIFIC errors

Error Cause Solution

When one or more ink cartridges are almost empty, the printer enters the

Ink out

Paper out

Paper jam

No ink cartridge

Call Service

low-ink state and continues printing. When the cartridge is completely empty, the printer indicates an ink-out error and stops printing.

If the printer f ails t o prop erly l oad paper , it indicates a paper-out error.

If the printer fails to prope rly eject pap er, it indicates a paper jam.

If the printer detects that one of the ink cartridges i s not installe d, 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.

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 and reset the waste ink counter with the adjustment program. See Chapter 5 for details.

Turn off the Stylus

Fatal error

A carriage control or CG access error has occurred.

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

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 29

EPSON Stylus Scan 2500 Revision A

SCANNER-SPECIFIC ERRORS

Table 1-18. Scanner-SPECIFIC errors

Error Cause Solution

Fatal error

ADF paper jam

Command error

ADF cover open

Maintenance cover open

• The lamp is broken.

• Stylus Scan turned on before the tran sportation screw w as removed.

• System breakdown.

ADF fails to eject the document.

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.

ADF cover open Close the cover.

Maintenance cover open Close the cover.

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

(Disposition) Turn off the lamp and stop

operation. Set bit 7 of the status byte.

After removing the document, turn the Stylus Scan off and back on, or send the ESC @ command. Parallel I/F init: active pulse

(Disposition) Turn off the lamp and stop

operation. Set bit 7 of the status byte.

Send a correct command to clea r th e e rror.

1.9 Options

The optional Auto Document Feeder and optional Transparency Unit designed for use with the GT-7000 scanner may also be used with the EPSON Stylus Scan 2500 under the following restrictions.

1.9.1 Local Copy

ADF

If a document is loaded in the ADF tray, the Stylus Scan loads and scans that document. If a document remains on the document glass, a copy is not produced normally. Even if multiple copies are selected, the Stylus Scan ignores this setting and produces only one copy per document sheet.

TPU

The TPU cannot be used in Local Copy mode. The Stylus Scan ignores the TPU in this mode.

1.9.2 Scanning

ADF

Same as the GT-7000.

TPU

If the Stylus Scan receives transparency scanning commands, it will turn on the TPU lamp and scan the transparency after the warm-up period. The Stylus Scan ignores the ADF in this mode. After scanning, the TPU lamp remains on until the TPU is turned off or until the Stylus Scan receives reflective document scanning commands.

If the Stylus Scan receives reflective document scanning commands, it will scan the document normally.

Product Description Options 30

EPSON Stylus Scan 2500 Revision A

1.10 Physical Characteristics

1.10.1 Dimensio ns

212 x 517 x 413mm (HWD) (not including, extended parts, rubber parts, and the ASF projection)

1.10.2 Weigh t

Approximately 12Kg

Product Description Physical Characteristics 31

EPSON Stylus Scan 2500 Revision A

Product Description Physical Characteristics 32

OPERATING PRINCIPLES

CHAPTER

EPSON Stylus Scan 2500 Revision A

2.1 General

The main components of the EPSON Stylus Scan 2500 are the printer mechanism, scanner mechanism, and the following circuit boards

Main: B102 Main Board Power Supply: B102 PSB/PSE Board Panel: B102 PNL Board

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 2500 does not have an exclusive mechanism to switch from paper feeding to pumping and back. Ins t e a d , thi s cont r o l is done by th e r otatio n a l direct i o n o f t he paper feed/ pump motor and also depends on the position of the carriage.

The printhead combines the black and CMY heads in on e unit. The following indicate the nozzle configurations of these 3 models.

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



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



Motor Types and Corresponding Functions

Motor Type Function

CR Motor Stepping Used to drive the carriage. page 38

• Drives the ASF to feed paper into paper path

• Drives paper feed rollers at variable

PF Mot or Stepping

speeds

• Drives the CR Lock lever (as described on page44)

• Drives pump unit to absorb ink

For det a ils

see

page 40

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

Operating Principles General 34

EPSON Stylus Scan 2500 Revision A

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

CR guide shaft

Disengage

flag

PF roller

PG lever

73.6 Gear/Precision Gear

ASF

sensor

Detector

wheel

shaft

rollers

PE sensor

Carriage HP

sensor flag

Carriage HP

sensor

CR Motor

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 printh e ad a nd carriage are described below.

PZT



PZT is an abbrevi ation of P iez o Electric Element. The print sign al is sent from the MAIN board to the PZT via the driver circuit on the printhead the ink stored in the cavity out through the nozzle. This process is described in more detail on the next page.

Ink c avi ty



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 bott om surface of the printhead which contains nozzle ho l e s 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 i s absorb ed into the inside of the printhead, there i s a large possibility that the nozzles will clog. Clogged nozzles can be detected by alignment failure and dot-missing problems. To prevent these k inds of pr oblems, a filter is se t below the cartridge needle and ink flows through the filter on its way to the ink cavity.

unit. Then, the appropriate PZT squeezes the cavity, forcing

Figure 2-1. Printer Mechanism Block Diagram

Operating Principles Printer Mechanism Operation 35

EPSON Stylus Scan 2500 Revision A

Nozzle selector

Board

Ink Out

sensor

actuators

Needle

Ink cartridge

PZT

(Piezo)

unit

Filter

Nozzle

plate

Figure 2-2.



Ink Out sensor actuators (x2) The Ink Out sensors (x2) detects whether or not an ink cartridge is installed according to the position of the Ink Out sensor actuator. When a cartridge is installed, the actuator is pushed down, which turns the shaft that is connected to the actuator. The flag at the other end of the shaft activates the Ink Out sensor when the cartridge is fully in place.

See the next page for more details on the nozzle selector board and the ink ejecting process.

Printhead

Ink cavity

Sectional Drawing

Operating Principles Printer Mechanism Operation 36

EPSON Stylus Scan 2500 Revision A

2.2.2 Printing Process

The following figures show sectional drawings of the printhead in the normal and ejecting states.

1. Normal State: When no print signal is output, the PZT is in the normal, standby, state.

Ink course

Piezo unit

Nozzles

Figure 2-3. Printhead Normal State

Cavity

Nozzle plate

surface

2. Ejecting State: 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.

Figure 2-4. Printhead Ejecting State

Operating Principles Printer Mechanism Operation 37

EPSON Stylus Scan 2500 Revision A

Rotor

2.2.3 Carriage Mechanism and Motor

The carriage mechani sm moves the carriage back an d 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 4Double 1-2 phase drives. This stepping motor 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.

Carriage Mo to r Sp ecifications

Items Description

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

Internal coil resistance Control method Bi-Polar Drive

Phase drive 2-2, 1-2, 2-Double 1-2, and 4-Double 1-2

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

Phase drive

CR Motor Control for 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 38

EPSON Stylus Scan 2500 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 p aper 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 adjustment 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 39

EPSON Stylus Scan 2500 Revision A

Rotor

2.2.4 Paper Feeding Mechanism

The pape r fee ding proce s s begin s at the ASF, conti nu es th r ou gh th e PF roller, and ends at the paper eject roller (and star-wheel gea r).

The ASF unit, which is common with the Stylus C OLOR 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 2500, a four-phase hybr id typ e pulse motor is used in the PF motor as a motive pow e r 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 mech anis m wh ic h i s ne ce ss ar y f or pr int h ead cle an in g. By usi ng th is pul s e 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 specificat ions.

Figure 2-7. PF Motor Internal Circuit Diagram

Motor Control for Each Mode

PF Motor Specifications

Item Description

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

Coil Resistance Control method Bi-Polar Drive

Phase drive 1-2, 2-2, Double 1-2, 2-Double 1-2

7.8 Ohms ± 10%(per 1 phase under 25°C environment)

Phase drive

Phase Drive Inch/pulse mm/pulse

2-2 1/720 0.035

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 PF rollers and paper eject rollers a s

1-2 1/1440 0.018

Double 1-2 1/2880 0.0088 2-Double 1-2 1/5760 0. 0044

described below.



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

→ Gear 73.6 → PF rollers

Operating Principles Printer Mechanism Operation 40

EPSON Stylus Scan 2500 Revision A

To the eject rollers:



PF motor pinion gear (CCW rotation) (13.5, 308)

NOTE: Above CCW rotation is mentioned viewing from the PF motor pinion

gear side.

→ Spur gear (28) → Paper eject rollers

Figure 2-8 sh ow s a paper feeding mechanism block diagram, whi ch includes the parts along the PF motor drive-transmission paths.

Gear

73.6

→ Gear 73.6 → Combination gear

PF Roller

Combination Gear13.5,30.8

Paper Eject Roller

PF motor

Gear 28

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 se nt from th e ASF/Pump mot or to the ASF unit v i a the disengage mechanism is used for the following operation.

Operating Principles Printer Mechanism Operation 41

EPSON Stylus Scan 2500 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 mechanis m to provide accurate and consistent paper feeding. This mechanism prevents a sheet of paper from falling from the paper set position into 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 turns 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 p aper 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 pred etermined number of seconds in step 4,

the L D r oller and t he pape r return lever automatically return to the standby state.

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

Operating Principles Printer Mechanism Operation 42

EPSON Stylus Scan 2500 Revision A

SMALLER TRAILING-EDGE MARGIN

Like the Stylus COLOR 740, this m odel 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 minimum margin of 14mm has been reduced to only 3mm.

Old Feeding

Method

Paper

New Feeding

Method (from

COLOR 740)

Star wheel

Assembly

Eject rolle rs

Moved to a 5 degree angle

Printhead Support roller

Platen

3mm bottom margin

may contact printhead

This area remains

stable

PF roller

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

Operating Principles Printer Mechanism Operation 43

EPSON Stylus Scan 2500 Revision A

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, “PF Motor Specifications,” on page 40 for motor specifications.

The PF motor controls the CR lock mechanism as well as the PF mechanism depen ding on th e d ir ection of the PF mo tor rot a tion. The CR lock me c hanism is located at the right end of the paper eject roller.

Top view

Pump Planetary

Right-side view

Lever

Carriage

Bushing 6

CR Lock

Lever

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), the CR Lock Lever is set under the Paper Eject Frame. But the CR Lock lever rises up and locks the carriage when th e P F mot or rotates CW.

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

→

Gear 73.6

CR Lock Lever

→

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 operations.

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 he ad 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 b een off. The printer selects and performs the appropriate cleaning operation according to the length of time it has been off.

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 a nd then e nters the sta ndb y mode. However, if no paper is in th e paper path when th e Lo ad /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 44

EPSON Stylus Scan 2500 Revision A

PAPER PICK-UP OPERATION

When the Load/Eject switch is pressed or printing order is input, 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

Spur 23.2/ASF

roller

transmission

gear

Combination

gear 16,40.8

Gear 73.6

Paper pickup

trigger lever

Combination G

16,21.6/Platen roller

transmission gear

Figure 2-12. Paper Pickup Mechanism

Gear 36/

Eject roll e r

drive gear

Combination

G 12.4,28/

Eject roller

transmission

gear

PF motor

pinion gear

Operating Principles Printer Mechanism Operation 45

EPSON Stylus Scan 2500 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 2500 has no engage/ disengage mechanism, mean in g the pump and platen are always at work when the PF motor operates. T he figu res below show printhead positions when the ink system and various ink-pumping sequences are performed.

Ejec t ro ller

drive gear

PF roller drive

gear

Figure 2-14. Major Ink Sequence Positions on Carriage

Printable Area

2976 d o t s ( 360-dpi)

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

Eject roller

transmission

gear

Carriage lock

lever

Cleaner blade

PF (pump)

motor pinion

gear

Pump roller

Figure 2-13. Ink System Mechanism

2.2.6 Pump, Carr iage Lock, Head Cleaner Mechanism

In the EPSON Stylus Scan 2500, 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 absorbed if the carriage is in the false-absorption position. Figure 2-13 shows process of conveying motive power to the pump drive roller.

Cap unit

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 burde n ed , onl y Gear C a nd the pu mp roll er ro ta te and no more motive power is conveyed to the lever part.

Operating Principles Printer Mechanism Operation 46

EPSON Stylus Scan 2500 Revision A

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

Axis of

Paper

eject

roller

Gear C

Gear A

Gear B

Compression

spring

Pump drive

roller

operation.

Pump Motor Rotation and Function

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 car riage l ock

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 t h e PZT doe s not move.

Pump unit operation

Figure 2-15. Pump Mechanism Power Transmission Process

Operating Principles Printer Mechanism Operation 47

EPSON Stylus Scan 2500 Revision A

Counter-Clockwise

Revolution

Tube squeezed

Clockwise

Revolution

Tube released

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

Pumping modes

Pump Mode Revolutions Absorption

Low speed Regular absorp-

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

0.38rev/second 0.06ml/second

1.3 rev/second 0.2ml/second

Operating Principles Printer Mechanism Operation 48

EPSON Stylus Scan 2500 Revision A

2.2.7 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 rubb e r f rame of the cap surface u ntil the power is turned b ack on.

An absorber pad is spread in the cap and can hold a certain amount of ink which is absor bed from the he ad without drai ning 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 th e 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 abs orption are performed in Position B.

Position C

Position A Positions B and C

Carriage flag

Ink Eject Valve

Negative Pressure

Valve

Closed-

valve state

Open-valve

Frame

flag

state

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.

Figure 2-17. Cap mechanism and valve operation

Operating Principles Printer Mechanism Operation 49

EPSON Stylus Scan 2500 Revision A

2.3 Scanner Principles

This section explains the operating principles of the sc an ner mechanism. The scanner mechanism can be divided into the Carriage Unit and Carriage Operation.

2.3.1 Carriage Unit

The Carriage Unit is mainly composed of the CCD sensor board, inverter board, lamp (li ght source), mirror, and lens. (See Figure 2-18 and Fi g u re 2-19.)

Inverter Board: This board provides voltage to drive the lamp. Lamp: A white cold fluorescent lamp is used as the light

source.

Mirror and Lens: The light emitted to the document reaches the CCD

sensor after being reflected on some mirrors one after another. Instead of changing the light source to create R/G/B light component as many previous models did, the color CCD itself creates each R/G/B light component.

Figure 2-19. Mirror, Lens Mechanism

Figure 2-18. Carriage Unit Component

CCD Sensor Board: This board controls the Color CCD line sensor

(independent R,G,B) and drive circuit.When power is turned on and the LCD display shows "Warm up", the CCD sensor board is actually performing a standard white t e st.

Operating Principles Scanner Principles 50

EPSON Stylus Scan 2500 Revision A

2.3.2 Carriage Operation

Scanning is performed in the main scan direction (=1 line) by the CCD sensor and in the sub-scan direction (=several lines) by the carriage movement. (See Figure 2-20.)

The line-type, color CCD sensor can scan 1 line in main scan direction (parallel) to the carriage unit) by one time. When scanning next lines after the second line in sub-scan direction, CR driving moves the carriage unit, which has CCD sensor inside, and scan the other lines. The scanned data is sent to the control board. The scanned data for “n” lines and “n-1” line are processed consecutively.

Figure 2-20. Carriage Movement

The Carriage Unit slides in the sub-scan direction along the guide rail. For this sliding operation, the carriage motor drives th e timing belt attached to the carriage unit by conveying the driving force through the driven pulley and reduction gear. Sca nning start position is determined by C R HP sensor, whi ch is located on the control board. Since the stepping motor is used for CR motor, carriage head position is controlled under the open loop system.

Operating Principles Scanner Principles 51

EPSON Stylus Scan 2500 Revision A

2.4 Local and PC Copy Principles

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

Local C opy = Scan and print t he scanned document using only the

Stylus Scan processing power. Can be connected or not connected to a computer.

PC Copy = Scan, process the scanned document in the open

application, and print from the application.

Stylus Scan 2500 Local Copy

Mode Setting

B/W Normal 300 360x360 Normal Plain Paper

B/W Fine 600 720x720 Variable Plain Paper

Color Normal 300 360x360 Normal Plain Paper

Color Fine 600 720x720 Variable Plain Paper

Scan Res.

dpi

Print Res.

dpi

2.4.1 Loc al copy process

Scan > gamma curve > color matching table > print

1. The scanner scans at 300 or 600 dpi.

2. The image data is processed through the gamma curve to remove the background color of plain paper or photo paper. Unlike the Stylus Scan 2000, this image processing includes MicroWeave, halftones, and so on.

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

4. The printer prints at 360 x 360 or 720 x 720 dpi, and color is full color.

Dot Size Media

Original Doc.

Type

Text - Business doc.

Photo - Text & Photo

Text - Business doc.

Photo - Text & Photo

Background Color

Removal

Newspaper color

EPSON Photo Quality Inkjet paper color

Plain paper color

EPSON Photo Quality Inkjet paper color

Color Photo 600 720x720 Variable Photo Paper Photo only No color removal

Operating Principles Local and PC Copy Principles 52

EPSON Stylus Scan 2500 Revision A

AutoPhotoFine (similar to PhotoEnhance in the driver) is used to

2.4.2 PC copy process

PC Copy Settings

Mode Setting Scan Res. dpi Print Res. dpi Media

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.

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

OriginalColorCopy

Normal 240 Speed All Fine 360 Quality All

2.4.2.1 Normal PC copy

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

1. The scanner scans at 300 or 600 dp, 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.

3. The image is improved with the Auto Document Enhancement feature which:

2.4.2.2 Original color copy

Original color copy does not process or enhance the scanned data. This is useful in two cases

Scan > OriginalColorCopy > color matching table > print

1. The scanner scans at 300 or 600 dp, 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 color matching table is consulted to convert RGB to CMYK.

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

Sharpens edges

Smoothens characters

Removes moire (usually - see original color copy below) from

documents that were printed from ink jet printers - this prevents CMYK color meshes from doubling when the image is printed again from an ink jet printer

Operating Principles Local and PC Copy Principles 53

EPSON Stylus Scan 2500 Revision A

2.5 Electrical Circuit Operating Principles

EPSON Stylus Scan 2500 contains the following three electric circuit boards.

Electronic Boards for Stylus C olor 2500 are;

Main: B102 Main Board Power Supply: B102 PSB/PSE Board Panel: B102 PNL Board

Refer to Figure 2-21 for the major connection of the 3 boards and their roles.

AC Input

B102 PSB/ PSE Board

+12VDC

CR Motor

PF Motor

(Pump Motor)

+5V/

3.3V DC

+42V/

24VDC

B/CMY Ink

Out Sensor

B102 MAIN Board

CR HP

Sensor

Thermisto Printhead

B102

PNL

Ink End

and P-off

time

+5VDC

LED &

LCD

Scanner HP

Sensor

Maintenance Cover Se n s o r

Nozzle selector

Board

Option

+24VDC

Scanner Motor

CCD Sensor

+12VDC

Scanner

Figure 2-21. Electric Circuit of Stylus Color 2500

Operating Principles Electrical Circuit Operating Principles 54

EPSON Stylus Scan 2500 Revision A

2.5.1 B102 PSB/PSE Board

The power supply board for the EPSON Stylus Scan 2500 generates +42VDC to drive the motors, +24VDC to drive the scanner and option, +12VDC to power the lamp, and +5VDC/+3.3VDC to power the printer logic. The table below shows application of voltages generated by PSB/PSE board.

1. Even if power is turned off during the middle of a print job, since the driving power is turned off after the carriage goes back to the carriage lock position, the possibility of clogged ink nozzles is reduced.

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.

Application of DC Voltage

Voltage

+42VDC

+24VDC

+12VDC

+5VDC

Printer Scanner

• CR Motor

• PF/Pump Motor

• Printhead drive

Application

• Scanner Motor

• Option unit drive Inverter board

CCD sensor board

Common

Control cir cuit

Sensors (CR HP, PE, ASF)

Control panel

Printhead control

Option unit logic

Figure 2-22 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.

+3.3VDC Control circuit

Operating Principles Electrical Circuit Operating Principles 55

EPSON Stylus Scan 2500 Revision A

IC53

IC151

+12V

regulator

+3.3V

+3.3V regulator

+24V

IC52

+24V

regulator

D89D88

SECONDARY SIDE

+42V

IC51

+5V regulator

+42V line constant

control

Smoothing

circuit

C51,C52

D51

+5V

ZD52,87

+42VDC line over

voltage limitation

ZD51,ZD8 1-8 6

ZD42

ZD53

voltage limitation

ZD91

+24V line ov er

voltage lim it a tion

+24V lin e over

ZD91

+12V line ov er

voltage lim it a tion

voltag e limitati on

Power drop delay circuit

C57,Q82,

Q84

Power signal

from MAIN

board/power

switch

+5V line ov e r

PC1

Photo coupler

Transformer (T1)

C11

Smoothing

circuit

Main

switch-

Feedback

circuit

Q2,Q3,Q

AC input

Fuse

Filter circuit

F1 L1, R1,

C1-4

Full wave

rectifier circuit

DB1

31,IC1

PRIMARY SIDE

Figure 2-22. B101 PSB/PSE Board Block Diagram

Operating Principles Electrical Circuit Operating Principles 56

EPSON Stylus Scan 2500 Revision A

1. As long as the AC power cable 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 (depen d ing on the model) and steps the voltage down before sending it to the secondary side.

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

ground levels for the primary side (AC as well as DC) and secondary side (DC only) are different, so they will short if they come into contact. The photo coupler transmits signals via a photo emitter.

13. The feedback circuit 1) receives over-current information from the photo coupler by means of a photo receiver 2) monitors the transformer for over-current and 3) receives power-supply information/commands from the MAIN board and power switch. The feedback circuit changes 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 activates whenever the power is turned off. The thirty-second period is necessary to guarantee safe completion of the power-down sequence.

2.5.2 B102 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 2500.

9. The 24V, 12V, 5V, and 3.3V regulators control the flow of current so that only the rated voltage flows through each regulator. The input level fluctuates but the output is constant.

10. The 42V, 24V, 12V, 5V, and 3.3V line over-voltage limitation protectors monitor their individual lines for any voltage over the rated amount. If over-current 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 over-current, it reports the over-current to the photo coupler.

12. The photo coupler is one part of the over-current feedback system. A photo coupler is necessary because electrical current cannot cross the from the primary side to the secondary side and vice-versa; the absolute

Operating Principles Electrical Circuit Operating Principles 57

EPSON Stylus Scan 2500 Revision A

USB

USB hub

CN3

IC17

Local Copy Block

(See the B101 MAIN

Board schematic in

Chapter 7)

IC9

1284 I/F

1284 Transceiver

System & Scan ner

Block

(See the B101 MAIN

Board schematic in

Chapter 7)

1284

Buttons

Printer Block

(See the B101 MAIN

Board schematic in

Chapter 7)

CN1

CN15

LED/LCD

CN2

Option

Panel

Unit

Scan

Mechani

Mechanis

MAIN Board

CN10

PSB/PSE Board

Figure 2-23. B102 Main Board Block Diagram

Operating Principles Electrical Circuit Operating Principles 58

EPSON Stylus Scan 2500 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 as well as any installed options.

The Printer Block

The Printer Block is all the ICs that 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 Local Copy Block

The Local Copy Block receives scanned data from the System & Scanner Block, removes the background color of the paper according to the local copy setting, performs image processing to improve quality, converts color from RGB to CMYK using the color matching table, and sends the modified data to the Printer Block.

The USB hub

There are actuall y two USB interfaces (one f or ea ch 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 59

TROUBLESHOOTING

CHAPTER

EPSON Stylus Scan 2500 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 lis ts the symptoms of certain problems. Once the pro blem is identified, refer to th e f lowchart that corresponds to t h e 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 73.

Diagnose problem

Table 3-1, “Printer Con dition and Panel Status”

Table 3-2, “Symptoms and Problems”

Unit Level

Repair

Component

Level Repair

Printer Mechanism,

page 65

Service the:

Scanner

Mechanism,

page 69

Table 3-1. Printer Condition and Panel Stat us

Indicators

Error Status

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

Paper jam condition

No Ink cart ridge or Ink end (black)

No Ink cart ridge or Ink end (color)

Maintenanc e request

Fatal error Flash On On Flash

PowerInk out

(Black)

--- Off Off Flash

--- On --- ---

--- --- On ---

Flash Flash Flash Flash

Ink

Out

(Color)

Paper

Out

Recovery

Load paper by pressing the load/e je c t b ut to n .

Eliminate a paper then press the load/eject button.

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

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

Change the waste ink pads and reset the EEPROM.

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

Or go directly to

Motors and Sensors

on page 73

Reassembly = Chapter 4 Adjustment = Chapter 5

Figure 3-1. Troubleshooting Process Flowchart

Troubleshooting Unit Level Troubleshooting 61

EPSON Stylus Scan 2500 Revision A

Table 3-2. Symptoms and Problem s

Symptom Problem Flowchart No.

Printer does not operate at power on.

Error is detected E rror i s in dicate d by LE D indic ation. Flowchart 3-2

Failure occurs durin g prin ting.

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 3-3

Print quality is poor. No paper is fed.

Paper feed is irregular.

Flowchart 3-4

Paper jam occurs.

No response to button access. Flowchart 3-5

3.1.1 Pr i nter / S canner does no t 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

Replac e t he f us e, disconnect CN10 on MAIN board, and turn on power

Check the motors, printhead, and other components.

supply

Replace the power supply.

Did

the fuse burn

out again?

Yes

End

Flowchart 3-1.

Troubleshooting Unit Level Troubleshooting 62

EPSON Stylus Scan 2500 Revision A

3.1.2 Error is detected

Start

Check t he LCD message 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

4.5.1 on page 92.

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

Yes

Turn o ff th e Styl us 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 3-4.

3.1.3 Failure occurs during printing

Start

Print a self test.

Did it print

properly?

Yes

print quality

normal?

Yes

Perform cleaning.

Problem

solved?

Yes

Perfor m adjustment. See Section 5.2 on page

114.

Replace the ink cartridge and print self test.

Yes

Problem

solved?

Refer to Table 3-4.

MAIN

boar d cables

are OK?

Connect them.

Problem

solved?

Yes

Replace th e MAIN bo ard.

Yes

Refer to Table 3-4.

Problem

solved?

Yes

End

End End

End

Yes

Problem

solved?

Flowchart 3-2.

Flowchart 3-3.

Troubleshooting Unit Level Troubleshooting 63

EPSON Stylus Scan 2500 Revision A

Control

panel connected

correctly?

START

Connec t 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

No problem = replace

Paper

loaded correctly

in ASF?

PF roller

and platen

rotate?

YES

Remov e an y

obstruction in the paper

path if there is any.

Clean the roller of

paper path.

3.1.5 Control panel operation is abnormal

Check th e PF motor.

the MAIN board.

Is the

problem

solved?

YES

END

Refer to Table 3-4.

Flowchart 3-4.

END

Flowchart 3-5.

Troubleshooting Unit Level Troubleshooting 64

EPSON Stylus Scan 2500 Revision A

3.2 Printer Related Troubleshooting

This section provides instruction for repairing the printer 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. Printer-Specific errors

Error Cause Solution

When one or more ink cartridges are almost empty, the printer enters the

Ink out

low-ink state and continues printing. When the car tridge is completely empty, the printer indicat es an ink- out error and stops printing.

Install a new ink cartridge.

Paper out

Paper jam

No ink cartridge

Maintenance request

Fatal error

If the printer fail s to proper ly load p aper, it indicates a paper-out error.

If the printer fails to properly eject pape r, 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.

Load paper and press the Lo a d/Eject button.

Press th e L o a d/Ej ect button . If this d o es 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.

Troubleshooting Printer Related Troubleshooting 65

EPSON Stylus Scan 2500 Revision A

Table 3-4. Repair of the Printer Mechanis m

Symptom Condition Cause Check Point Solution

Abnormal pump mechanism operation

Ink is not absorbed or is poorly absorbed.

Abnormal c arriage operation.

Abnormal PF motor operation when the power is turn e d on.

Used ink does not go throug h the wa ste 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 drive the platen drive gear and check it if it rotates normally.

Check the inner coil resistance and see if there is a ny disconnection of t h e 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 is any substances or not.

Check the inner coil resistance and see if there is a ny disconnection of t h e coil.

Check whether the carriage moves smoothly when moved manually.

Check tension of the timing belt.

Check if there is any foreign substances in the car riag e 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 Printer Related Troubleshooting 66

EPSON Stylus Scan 2500 Revision A

Table 3-4. Repair of the Printer Mechanism (cont.)

Symptom Condition Cause Check Point Solution

Printing is not performed.

Abnormal pr inting

The carriage moves, but no printing is performed.

Only a particular dot causes abnormal printing.

Head FFC is out of connection.

The FFC is disconnected inside.

I/C is defective.

Head unit i s defective.

Print head surface is not clean.

(dot missing)

The h ea d unit is defective.

Capping absorber is touching the head surface.

Print head surface is not clean. (dot -m issing)

The head FFC is disconnected inside.

Check if the head FFC on the board or carri ag e 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 2or 3 times cleaning operation, replace the head unit and perform the self-test.

Perform the cleaning operation several times and check printing.

Check the head absorber visually.

Perform the cleaning operation several times and check printing.

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

Connect the FFC properly.

Replace I/C.

Replace the head unit.

Perform the cleaning.

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

Replace the head absorber if it is deformed.

Perform the cleaning.

A dot is not printed occasionally.

Black specks or dots.

The head FFC is out of connection.

The h ea d 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 h ea d unit is detective. Check connection with the head FFC.

Check if the head FFC on the board or carri ag e is connected surely.

Perform the cleaning operation several times and check printing.

Check if the head FFC on the board or carri ag e is connected surely.

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.

Troubleshooting Printer Related Troubleshooting 67

EPSON Stylus Scan 2500 Revision A

Table 3-4. Repair of the Printer Mechanism (cont.)

Symptom Condition Cause Check Point Solution

Abnormal pr inting (continued)

Abnormal paper feeding.

A vertical line is not aligned.

White line appears in the image data.

Paper is not fed.

Bi-directional alignment is not adjusted.

Head angle is not correct. Perform head angle adjustment. Refer to Chapter4.

Platen gap is not correct. Perform platen gap adjustment. Refer to Chapter4.

Dot shooting direction is tilted because head surface is not clean

I/C is defective.

Head unit i s defective.

Friction of the PF roller.

Abnormal operation of the hopper.

Malfunction of ASF drive change-over.

Friction of the PF roller.

Perform Bi-D adjustment. Refer to Chapter4.

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 when 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.

Perform the cleanin g 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.

Troubleshooting Printer Related Troubleshooting 68

EPSON Stylus Scan 2500 Revision A

Table 3-4. Repair of the Printer Mechanism (cont.)

Symptom Condition Cause Check Point Solution

Printer stops during initialization.

Fatal error appears.

ASF sensor is defective.

PE sensor is defective.

HP sensor is defective.

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

CR motor is defective. C heck the CR motor cable is connected.

PF motor is defective. Check if the PF motor cable is connected.

Check the signal level of the ASF sensor. (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.)

Replace ASF sensor.

Replace PE sensor.

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

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

Troubleshooting Printer Related Troubleshooting 69

EPSON Stylus Scan 2500 Revision A

3.3 Scanner Troubleshooting

This section describes troubleshooting from the abnormal phenomenon. You can isolate the faulty unit based on the abnormal phenomenon. See Table 3-6, “Service Level Troubleshooting Starts Here,” on page 69 to find the closest phenomenon and the corresponding table to refer to.

Table 3-5 . User-level S can n e r-Sp ecific errors

Error Cause Solution

Fatal error

ADF paper jam

Command error

ADF cover open

• The lamp is broken.

• Stylus Scan turned on before the tran sportation screw w as removed.

• System breakdown.

ADF fails to eject the document.

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.

ADF cover open Close the cover.

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

(Disposition) Turn off the lamp and stop

operation. Set bit 7 of the status byte.

After removing the document, turn the Stylus Scan off and back on, or send the ESC @ command. Parallel I/F init: active pulse

(Disposition) Turn off the lamp and stop

operation. Set bit 7 of the status byte.

Send a correct command to clea r th e e rror.

Table 3-6. Service Level Troubleshooting Starts Here

Phenomenon Description Ref, Table

• The Operate light on the control

Scanner does not operate with power on.

Fatal Error occurs and is not cle ared after turning off and back on the scanner.

Scanned image is unclear.

“Interface Error” is indicated.

“Option Error” occurs. Optional unit(ADF/TPU)

do not operate.

panel does not come on.

• Scanner does not operate the initialization.

• Carriage unit does not operate.

• Carriage unit crashes into the frame, and an error is indicated.

• The lamp does not light up.

--- Table 3-12

• SCSI Interface Error

• USB Interface Error

• Optional unit does not operate correctly.

Table 3-7. Power problems

Cause Step Checkpoint Finding Solution

Connector CN1 on the power board is disconnected.

Connector CN1 or CN2 on the power board disconnected.

Fuse on the power board has blown out.

Is the connector CN1 on the power

board disconnected?

Is the connector CN1 or CN2 on

the power board disconnected?

Has the fuse on

the power board blown out?

Yes

Yes Replace the fuse.

Connect CN1 properly.

Connect CN1 or 2 properly.

Table 3-7 Table 3-8

Table 3-9

Table 3-10

Table 3-11

Table 3-13 Table 3-14

Table 3-15

Maintenance cover open

Maintenance cover open Close the cover.

Troubleshooting Scanner Troubleshooting 70

EPSON Stylus Scan 2500 Revision A

Table 3-7. Power problems (cont.)

Cause Step Checkpoint Finding Solution

With the scanner On, check the voltage output

The power board.is broken.

Connector CN4 on the power board is disconnected.

The control board is broken.

level between pins 8/9(+) and

pins 6/7(-) on the power board. Is the voltage +5VDC?

Is the connector CN4 on the

control board disconnected?

6 --- ---

Yes

Table 3-8. Scanner does not initialize

Cause Step Checkpoint Finding Solution

Connector CN1 on the power board is disconnected.

Is the connector CN1 on the power

board disconnected?

Yes

Replace the power board.

Connect CN4 properly.

Replace the control board.

Connect CN1 properly.

Table 3-9. Carriage Unit does not operate

Cause Step Checkpoint Finding Sol ution

With the scanner power

Power board is broken.

Carriage Unit (or CR move mechanism) is brok en .

on, check the voltage output level between the

Pins 4/5(+) and Pins 6/7 (-) for CN101 on the power board. Is it +24VDC?

• With the scanner upper case removed, does CR motor move?

• With the CR moto r

removed, does the carriage unit move smoothly?

Replace the power board.

Check the carriage move mechanism and replace the corresponding parts or disassemble and assemble the part.

Troubleshooting Scanner Troubleshooting 71

EPSON Stylus Scan 2500 Revision A

Table 3-9. Carriage Unit does not operate (cont.)

Cause Step Checkpoint Finding Solution

Disconnect the connector CN6 on the control board, then using the tester,

CR Motor is broken

Control board is broken.

check the co il re sistance between Pin2 and 4 and between Pin1 and 3. Is the resistance of 2 points about 6.2

If any motor co il is shorted, check the CR motor drive circuit in the

order below.

1.)Set the te ster on O hms.

2.)Place the (-) lead of the tester on any of Pins 1,2, 3 or 4 for CN1 on the control hoard.

3.)Place the (+) lead of the tester on Pin 6/7 for CN4 on the control board.

With the scanner off, does the meter show “

4 --- ---

Ω?

∞

”?

Replace the CR motor.

Replace the power board.

Replace the control board.

Table 3-10. Carriage unit crashes into frame

Cause Step Checkpoint Finding Solution

Check the signal level.

• Check the signal/status level between

CR home position sens or is brok en.

C(+) and E(-) for PC2.

H(about 4.5V)/ when PC1-PC2 is closed.

L(0.3V)/when PC1

-PC2 is opened.

Table 3-11. The lamp does not light up.

Cause Step Checkpoint Finding Solution

Connector CN5 on the control board is disconnected.

Connector CN1 or CN2 on the CCD board disconnected.

Lamp is not connected properly on the inverter board.

Is the connector CN5

on the control board disconnected?

Is the connector CN1 or CN2 on the CCD

board disconnected?

Is the lamp connected properly

on the inverter board?

Yes

Replace the CR home position sensor(PC1/PC2) on the control board.

Connect CN5 properly.

Connect CN1 or 2 properly.

Connect the lamp properly.

Lamp is broken. 4

Inverter board is broken.

Control board is broken.

Does t he lamp li gh t after it is replaced?

Does it operate

properly after replacing it?

6 --- ---

Yes

Replace the lamp.

Replace the inverter board.

Replace the control board.

Troubleshooting Scanner Troubleshooting 72

EPSON Stylus Scan 2500 Revision A

Table 3-12. Poor image quality

Cause Step Checkpoint Finding Solution

Mirror in the carriage unit is dirty.

CCD sensor board is broken.

Control board is broken.

Is the image scanned clearly

after cleaning the mirror?

2 --- --

3--- ---

Table 3-13. SCSI Interface Error

Cause Step Checkpoint Finding Solution

Check the user’s

Terminator swit ch is set wrong.

SCSI setting is wrong.

SCSI cable is defective.

Control board is broken.

guide for the correct setting. Is

the se tting correct?

Check the user’s guide for the correct setting. Is

the se tting correct?

Replace the SCSI cable. Is the

operation normal?

4 --- ---

Yes

Clean the lamp surface.

Replace the CCD board.

Replace the control board.

Set the termi nato r correctly.

Set the SCSI correctly.

Replace the SCSI cable.

Replace the control board.

Table 3-14. Parallel Interface Error

Cause Step Checkpoint Finding Solution

On the Windows, go to “My

Host and O/S (Windows95/98) does not support the USB.

USB cable is broken.

Control board is broken.

Computer” perty”

Manager”, then, check if “Universal serial bus controller” is effective.

Replace the USB

3--- ---

cable. Is the

→

”Device

operation

normal?

”Pro

No Replace the host.

Yes

Table 3-15. Option unit malfunction

Cause Step Checkpoint Finding Solution

The cable of the optional unit is disconnected.

Control board is broken.

Optional unit is broken.

Is the connector CN1 on the

control board disconnected?

2 --- ---

+24V line:Lamp, Motor

+5V line:Sensor, logic circuit.

Yes

---

Replace the USB cable.

Replace the cont ro l boa rd.

Connect the CN1 properly.

Replace the cont ro l boa rd.

Replace the defective part of the optio nal unit.

Troubleshooting Scanner Troubleshooting 73

EPSON Stylus Scan 2500 Revision A

3.4 Troubleshooting Motors and Sensors

Table 3-16. Motor Resistance and Measurement Procedure

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 3-17. 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

Color Cartridge Sensor

Thermistor CN9/ Pins

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

CN9/Pins

2 & 19

Off: more than 2.4V

Analog data

Out of home position

Black cartridge instal le d

Color cartridge instal le d

Change the VH voltage of charge pulse for common driver circuit

10%

Troubleshooting Troubleshooting Motors and Sensors 74

DISASSEMBLY & ASSEMBLY

CHAPTER

EPSON Stylus Scan 2500 Revision A

W ARNING

4.1 Overview

This chapter describes procedures for disassembling the main components of the EPSON Stylus Scan 2500. 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 re quired after disas sembling 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 2500.

Precautions for Di sassembling th e Printer



Disconnect the power cable before disa ssembling 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 direction. (This may cause burning or explosion.)

Disassembly & Assembly Overview 75

EPSON Stylus Scan 2500 Revision A

CAUTION

W ARNING

CAUTION

Danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacture. Dispose the used batter ie s a cc or d in g to go vern m ent ’ s l aw a n d r egu l at i ons .

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. (See Chapter 5 for details.)



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;



Once the ink cartridge mounted 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.



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

Disassembly & Assembly Overview 76

EPSON Stylus Scan 2500 Revision A

4.1.2 Tools

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

Table 4-1. Tool List

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

4.1.3 Specification for Screws

Table 4-2 shows screw specifications. During assembly and disassembly, make sure that the specified types of screws are used at proper locations, referring to the table below. Note that the screw numbers described in the manual correspond to the numbers in the table.

Table 4-2. Screw Characteristics

Name Size

+Bind, S-tight (CBS)

+Bind, S-tight 3X10 +Bind, P-tight

(CBP) +Bind, P-tight 3X10 +Bind, P-tight 3X8 +Pan head

(CP) +Bind, S-tight,

Sem s R 2 (CBS Sems)

3X6

3X4

3X6

Disassembly & Assembly Overview 77

EPSON Stylus Scan 2500 Revision A

Table 4-3. Screw Types and Abbreviations

Top Side

1. Cross-re cessed 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/fla nge

4. Truss

4. Tapping

Disassembly & Assembly Overview 78

EPSON Stylus Scan 2500 Revision A

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 units

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 m o tor at t he co rrect tempe r ature

(not over heating)?

Is paper fed smoothly?

Does paper get jammed?

Does paper get skew during paper feeding?

Are papers multi fed?

Does the PF motor get overheated?

Abnormal noise during paper feeding?

Is the paper path clear of all obstructions?

Checked / VNot necessary

Disassembly & Assembly Overview 79

EPSON Stylus Scan 2500 Revision A

Table 4-4. Inspection Checklist for the Stylus Scan

Category Component Item to check Is Check Required?

Is the glass surface clean? Mechanism

Scanner unit

Adjustment Specified adjustment items Are adjusted conditions all right ?

Lubricant Specified l ubricate d item

Function

Carriage mechanism

Lamp

Printer ROM version Newest version: Scanner ROM version Newest version: Ink cartridges Are the ink cartridges installed correctly?

Does paper skew during loading or feeding

Any abnormal noise during movement?

Does the carriage move smoothly?

Any abnormal noise during movement?

Any dirt or obstacles around the shaft of gear

cover?

Is the CR m o tor at t he co rrect tempe r ature

(not over heating)?

Does the lamp turn on and successfully

perform white-reflective test near home

position?

Is lubrication applied to the specified

locations?

Is the quantity of lubrication adequate?

Checked / VNot necessary

Shipping

Others Attached items Are all attached items from users included?

Pads on bottom Are all five pads attached to the bottom? Protection conditions

during transport

Are all the pointed parts firmly fixed?

Checked / VNot necessary

Disassembly & Assembly Overview 80

EPSON Stylus Scan 2500 Revision A

4.2 Disassembly Procedures

The flowchart below shows procedures for disassembly.

Start

Removal of the

housing

Removal of the

Scanner Mechanism

Removal of the

circuit board tr a y

Removal of printer

consuma bl e s

Before servicing the Stylus Scan, perform these

CR home position

Rear cover

Scanner removal

B102 MAIN Board

B102 PSB/PSE

Board

Frame & paper

eject tray removal

operations as described in the User’s Guide.

Ink cartridge

removal

Top cover

Scanner frame

removal

Waste ink pads

Power off &

unplug

Control panel

Sens or a nd o pti on

I/F removal

Cleaning assembly

Side covers

Disassembly of the

Printer Mechanism

Printhead

removal

PF motor

CR Motor

CR HP sensor

removal

ASF removal

Paper edge

sensor removal

Shaft removal

ASF home

position sensor

Paper feed rollers

Disassembly & Assembly Disassembly Procedures 81

EPSON Stylus Scan 2500 Revision A

4.3 Removing the Housing

4.3.1 Removing the rear cover

1. Remove the paper stacker.

2. Remove four (CBS 3x6) screws.

3. Pull out the rear cover from the bottom.

Disassembly & Assembly Removing the Housing 82

EPSON Stylus Scan 2500 Revision A

CAUTION

4.3.2 Remov ing the top cover

1. Remove the rear cover as described above.

2. Remove the Document cover, the Maintenance cover, and the optional interface cover.

3. Move the scanner mechanism towards the middle of the Stylus Scan.

4. Remove three screws

Remove three CBS 3x6

screws.

5. Lift the top cover from the screw-side and slide it away from you so that the hooks clear the frame on the opposite side.

4.3.3 Removing the control panel assembly

The control panel assembly is replaced as one piece; there is no board-level repair.

1. Remove the rear cover and top cover as described in the two previous sections.

2. Remove two screws (CBS 3x10) and slightly pull out the control panel assembly.

3. Remove the FFC.

When re-inserting the FFC into the control panel board connector, make sure the FFC is fully inserted but do not use too much force. Also, the connector is difficult to see properly so it is easy to scrape or peel off the connecting strips at the end of the FFC. You need to check the strips at the end of the FFC for wear, folds, and tears every time you remove the FFC.

Disassembly & Assembly Removing the Housing 83

EPSON Stylus Scan 2500 Revision A

4.3.4 Removing the side covers

1. Remove the rear and top covers as described in “Removing the rear cover” on page 82 and “Removing the top cover” on page 83.

2. Remove two screws (CBS 3x6) securing the left-side cover and remove the cover by pulling out and up from the top.

Remove one screw

in front and one

4.3.5 Removing the scanner support frame

To access the printer mechanism, printer motors, waste ink pads, or the B102 Power Supply board, you need to remove the scanner support frame . You only need to remove the scanner from the scanner support frame when servicing the scanner mechanism.

1. Remove the rear cover and top cover as described in “Removing the Housing” on page 82.

2. Pull out the circuit board tray as described in “Removal of the Circuit Board Tray” on pag e90, and remove the scanner FFC (CN14). Also remove the CN11, CN12, and CN15 connectors.

3. Remove the side covers as described in “Removing the side covers” on page 84.

4. On the left side of the Stylus Scan pull the Scanner HP sensor cable, Maintenance-cover-open cable, and Option-interface cable through the clips and hole in the left-side frame.

Pull the cables out of the clips and out

through the other side of this hole.

CAUTION

Be very careful when removing or replacing the side covers. The hooks at the bottom are precisely positioned, and forcing them in or out can easily break them.

3. Repeat this process for the right-side cover after removing the paperthickness lever handle (blue).

Disassembly & Assembly Removing the Housing 84

EPSON Stylus Scan 2500 Revision A

Remove one screw on the

right side.

5. Remove five screws (CBS 3x6) securing the scanner support frame to the printer mechanism frame, and remove the scanner support frame.

Remove these five screws from the

scanner support plate.

Scanner HP sensor

4.3.6 Removing the paper eject assembly

scanner mechanism.

1. Remove the rear cover and top cover as described in “Removing the Housing” on page 82.

2. Remove the side covers as described in “Removing the side covers” on page 84.

3. Remove the scanner support frame as described in “Removing the scanner support frame” on pag e84.

4. Remove three screws (CBS 4x6)

Maintenance cover open

sensor

Option interface

Disassembly & Assembly Removing the Housing 85

EPSON Stylus Scan 2500 Revision A

4.3.7 Removing the power supply board upper frame

1. Remove the rear cover and top cover as described in “Removing the Housing” on page 82.

2. Remove the side covers as described in “Removing the side covers” on page 84.

3. Remove the scanner support frame as described in “Removing the scanner support frame” on pag e84.

4. Remove one connector for the AC cable, and one screw (CBS 3x6) and one spacer.

Remove two screws

on the left side.

NOTE: The picture a bove shows th e scanner home-position sensor

and maintena nc e cover ope n sensor cables still attached to the left side frame. You can either leave them as shown above or remove them along with the option connector cable as describe in attached to the side frame scanner support frame” on pag e84.

in “Removing the

Spacer and

connector

5. Carefully remove the paper eject assembly to avoid scratching the surface on any of the metal parts.

Disassembly & Assembly Removing the Housing 86

EPSON Stylus Scan 2500 Revision A

5. Remove one screw (CBS 3x6) securing the power-button board and one screw (CBS 4x6) securing the upper frame..

Cable protector

Remove two

screws.

6. Pull the upper frame a little to the center and front of the Stylus Scan. Remove the cable protector and cables. Remove the power board frame.

4.3.8 Removal of the B102 PSB/PSE Board

1. Remove the rear cover and top cover as described in “Removing the Housing” on page 82.

2. Remove the side covers as described in “Removing the side covers” on page 84.

3. Remove the scanner support frame as described in “Removing the scanner support frame” on pag e84.

4. Remove the paper eject assembly as described in “Removing the paper eject assembly” on page 85.

5. Remove the power supply board upper frame as described in “Removing the power supply board upper frame” on page 86.

6. Disconnect the power cable leading to the B 102 MAIN board, and remove three screws (CBS 3x6).

Remove one

connector and

three screws.

Disassembly & Assembly Removing the Housing 87

EPSON Stylus Scan 2500 Revision A

CHECK

PO INT

4.3.9 Removing the printer mechan ism

1. Remove the rear cover and top cover as described in “Removing the Housing” on pag e82.

2. Remove the side covers as described in “Removing the side covers” on page 84.

3. Remove one screw (CBS 3x6) from the right-side frame.

4. Remove two screws (CBS 4x6) and two spacers.

NOTE:

As shown in th e abov e photos, you do not have to remove the scanner frame or right-side frame to remove the printer mechansim.

When replacing the printer, you need to be careful about 1) the printer position on the base and 2) the spacer edge must be parallel to the printer frame.

Two screw s

and spacers

Disassembly & Assembly Removing the Housing 88

EPSON Stylus Scan 2500 Revision A

5. Remove three screws (CBS 4x6) and one screw (CBS 3x6). 6. Remove two screws (CBS 3x6) and lift the side panel from the bottom to

finally see the bare, naked printer mechanism.

Remove three screws.

Remove two screws.

Remove one screw.

Disassembly & Assembly Removing the Housing 89

EPSON Stylus Scan 2500 Revision A

CAUTION

CHECK

PO INT

4.4 Removal of the Circuit Board Tray

The plastic cable protectors are h eld i n place when the

Unlike the Stylus Scan 2000, the 2500 contains only the B102 MAIN board in the circuit board tray. See Section 4.7.1.2 for details on removing the B102 PSB/PSE board.

1. Remove the rear cover as described in “Removing the rear cover” on page 82.

2. Remove four CBS 3x6 screws securing the circuit board tray.

Remove four screws.

4. Remove ten connectors and three FFCs as follows.

T T T T

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 protectors, keep in mind that the protectors must be fully inserted so that the hooks properly attach to the tra y.

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

To the scanner: CN14, CN11, CN12, CN13 To the control panel: CN2 To the Power Supply board: CN10 To the printer: CN4, CN5, CN6, CN7, CN8, CN9

3. Pull out the tray slightly, and using a flat-tip screwdriver unhook the cable-protector clip hooks from the tray. Remove the clips from the tray.

Disassembly & Assembly Removal of the Circuit Board Tray 90

To the option interface: CN15

5. To remove the B102 MAIN board, remove

EPSON Stylus Scan 2500 Revision A

eight CBS 3x6 screws securing the board to the bottom of the tray

three CP 3x6 screws securing the connector interfaces.

4.5 Removal of the Printer Consumables

6. Remove the circuit board.

Disassembly & Assembly Removal of the Printer Consumables 91

EPSON Stylus Scan 2500 Revision A

CHECK

PO INT

4.5.1 Removing the waste ink pads

1. Remove the rear cover and top cover as described in “Removing the Housing” on pag e82.

2. Remove the scanner support frame as described in “Removal of the Circuit Board Tray” on page 90.

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

(CBP 3x8)

4. Remove the spacer on the left side of the tray and carefully pull the tray out and downward.

When re-installing the waste ink tank, make sure to secure the hooks on the left of the tray on top of the spacer.

5. Remove one screw (C BP 3x10) secu ring the waste ink tank cover, and then remove the cover.

6. Carefully remove the old waste ink pads so as not to get yourself or anyone/anything else dirty.

Spacer

Waste ink tank

Figure 4-1. Removing the waste ink tank

Disassembly & Assembly Removal of the Printer Consumables 92

EPSON Stylus Scan 2500 Revision A

CAUTION

4.5.2 Removing the cleaning assembly (Pump and Cap)

1. Remove the housing as described in “Removing the Housing” on page 82.

2. Remove the waste ink tank as described in “Removing the waste ink pads” on pag e92.

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

5. On the right side of frame, remove the hook holding the cap assembly and release two protrusions attached to the frame, lifting up the right side of cap assembly, then 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 4-2 on the next page.)

6. Remove two screws (CBP 3x8) securing the pump assembly to the frame. (Refer to Figure 4-2 on the next page.)

7. Release a hook s ecuring the pump assembly to the frame and remove the pump assembly, moving it toward the right. (Refer to Figure 4-2 on the next page.

Do not damage the rubber part (bla ck 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 print head, and may cause a malfunction in operation.

When 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.

Disassembly & Assembly Removal of the Printer Consumables 93

EPSON Stylus Scan 2500 Revision A

CHECK

PO INT

When reassembling the cleaning assembly, refer to the figu re below.

Since the spring is included among the gears in the pump assembly, b e care ful that the parts do not pop out during disassembly and assembly.

When as sembli ng the pr i nter, 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 Removal of the Printer Consumables 94

EPSON Stylus Scan 2500 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 4-2. Removing the Cap and Pump Assemblies

Disassembly & Assembly Removal of the Printer Consumables 95

EPSON Stylus Scan 2500 Revision A

CAUTION

ADJUSTM ENT

REQUIRED

4.6 Disassembling the Printer Mechanism

Since the ink cartridge once taken out can not be used again, be sure to install a new ink cartridge

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

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

4.6.1 Remov ing the Printhead Unit

cartridge installed and the carriage in the home position when the printer is turned on.

1. Remove the upper cover as described in Section 4.3.

2. Remove the upper frame as described in “Removing the scanner support frame” on pag e84.

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 4-3 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.

See the following pages for the figures below:

Figure 4-3, “Removing the Print Head” Figure 4-4, “Installing the Printhead”

CHECK

PO INT

Make sure that the earth board is installed to the carriage correctly. (There are 2 pins to determine the location.)

When you install the printhead to the carriage, make sure that the location pin on the carriage side is placed in the notch of the printhead.

When you replace the printhead unit, perform the following adjustmen t s (Refer to Chapter 5 for m ore details.):

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

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

5.2.2.7.)

3. Head Angular Adjustme nt ( Re fer t o Cha p ter 5/ Section 5.2.2.8.)

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

Disassembly & Assembly Disassembling the Printer Mechanism 96

EPSON Stylus Scan 2500 Revision A

Step 9. Remove

the printhead.

Printhead Unit

Step 6.

Remove

the FFC

and FFC

guide.

FFC

Fastener Head

Step 8. Remove one CBP

3x6 screw

and the

fastener.

Make sure that

this protrusion is

in the U ditch of

the print head

side.

This part should

be touching the

CR shaft receiver.

Make sure that

the protrusion of

the carriage fits

in this hole.

Carriage Assembly

Step 7.

Remove the

tension spring

Note: There are no

actuators on the printhead.

located here.

Figure 4-3. Removing the Print Head

Nozzle Selector has been enclosed into head.

Figure 4-4. Installing the Printhead

Disassembly & Assembly Disassembling the Printer Mechanism 97

EPSON Stylus Scan 2500 Revision A

CHECK

PO INT

4.6.2 Removing the PF Motor Assembly

1. Remove the housing as described in “Removing the Housing” on page 82.

2. Remove the waste ink tank. (Refer to Section 4.5.1.)

3. Remove the following gears located on the left side of the printer mechanism.

Combination gear 12.4, 28

Gear 36

Gear 73.6

CAUTION

Gear 73.6 is a pre cision gear and yet it is difficult to remove. Do not bend the gear and do not hold the gear by its edges. Doing so may cause the gea r paper feed operation to be slightly off. Remove the c-ring securing the gear with tweezers or a () driver, and gently pull the gear away. Try to only touch the knobs or edges on the inner or central part of the gear.ve it while holding the whole gear, slightly pulling it toward you.

NOTE: It may be a good idea to bring an extra gear with

you when performing on-site service.

Gear 34

Spur gear

23.2

Combination gear 16,40.8

Spur gear 26.4

Compression Spring 0.9

Gear 73.6

C-Ring

Combination Gear8, 14.4

Hexagon Nuts

Gear 36

Combination Spring 8.8, 21.8B102 MAIN

PRR Motor Assembly

Figure 4-5. Removing the PF Motor Assembly

4. Remove the circuit board tray as described in “Removal of the Circuit Board Tray” on pag e90, 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 di sasse mbling the PF motor assembly, pull the motor assembly out of the frame a little bit and remove it, sliding it into a larger hole in the frame. (See Figure 4-5.)

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

Do not damage or mar the grooves in the gears during the disassembly and assembly.

Disassembly & Assembly Disassembling the Printer Mechanism 98

EPSON Stylus Scan 2500 Revision A

4.6.3 Remov ing the CR Motor Assembly

1. Remove the housing. (Refer to Section 4.3)

2. Rotate the gear 73.6 toward you and release the carriage lock mechanism, then move the carriage to the center.

3. Pull out the circuit board tray as described in “Removal of the Circuit Board Tray” on pag e90, and disconnect the CR motor cable from CN7.

4. Loosen the timing belt by pushing the driven pulley holder 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

After installing the CR motor assembly, make sure that two protrusions on the motor bracket are aligned with the location holes in the frame. (Refer to Figure 4-7.)

Compression Spring 19.6

Driven Pulley Assembly

Timing Bell

(No.1)

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

frame when installing the CR motor assembly.

Figure 4-7. Removing and Installing the CR Motor Assembly

To the Exterior

of Side Frame

Driven Pulley

Holder

To the Interior of

Side Frame

Figure 4-6. Removing the Timing Belt

Disassembly & Assembly Disassembling the Printer Mechanism 99

Epson Scan 2500 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

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 Printing

1.2.5 Input data buffer

1.2.6 Control codes

1.2.7 Paper feed

1.2.8 Pape r

1.2.9 Ink

1.3 Scanner

1.4 Common

1.4.1 Electrical specifications

1.4.2 Safety , EMC

1.4.3 Environmental conditions

1.4.4 Resistance to electric noise

1.4.5 Reliability

1.4.6 Acoustic noise

1.5 Interfaces

1.5.1 Printer Interface

1.5.2 Scanner interfaces

1.6 Control Panel

1.6.1 Buttons

1.6.2 Indicators and LCD Display

1.6.3 Initialization

1.7 Settings Menu

1.8 Stylus Scan Errors

1.9 Options

1.9.1 Local Copy

1.9.2 Scanning

1.10 Physical Characteristics

1.10.1 Dimensio ns

1.10.2 Weigh t

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 and Motor

2.2.4 Paper Feeding Mechanism

2.2.5 Ink System

2.2.6 Pump, Carr iage Lock, Head Cleaner Mechanism

2.2.7 Cap Mechanism

2.3 Scanner Principles

2.3.1 Carriage Unit

2.3.2 Carriage Operation

2.4 Local and PC Copy Principles

2.4.1 Loc al copy process

2.4.2 PC copy process

2.5 Electrical Circuit Operating Principles

2.5.1 B102 PSB/PSE Board

2.5.2 B102 MAIN Board

TROUBLESHOOTING

3.1 Unit Level Troubleshooting

3.1.1 Pr i nter / S canner does no t 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 Printer Related Troubleshooting

3.3 Scanner Troubleshooting

3.4 Troubleshooting Motors and Sensors

DISASSEMBLY & ASSEMBLY

4.1 Overview

Precautions for Di sassembling th e Printer

4.1.2 Tools

4.1.3 Specification for Screws

4.1.4 Service Checks After Repair

4.2 Disassembly Procedures

4.3 Removing the Housing

4.3.1 Removing the rear cover

4.3.2 Remov ing the top cover

4.3.3 Removing the control panel assembly

4.3.4 Removing the side covers