Epson STYLUS COLOR 480 Service Manual

®

SERVICE MANUAL

Color Inkjet Printer

EPSON STYLUS COLOR 480

SEIJ00002

Notice

o All rights reserved. No p art of t his manual may be reprod uced, stored i n a ret rieval sy stem, or t ransmit ted in any form or by a ny means el ectroni c,

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

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

greatly appreciate being informed of them.

o The contents of this manual are subject to change witho ut notice.
o All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would

greatly appreciate being informed of them.

o 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.

Copyright © 2000 SEIKO EPSON CORPORA TION. Printed in Japan.

PRECAUTIONS

Precautionary notations throughout the text are categorized relative to 1)Personal injury and 2) damage to equipment.
DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing

procedures preceded by DANGER Headings.

WARNING Signals a precaution which, if ignored, could result in damage to equipment.
The precautionary measures itemized below should always be observed when performing repair/maintenance procedures.

DANGER

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

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

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

WARNING

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

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

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

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

About This Manual

This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPSON Stylus Photo 720 / Stylus
Photo EX3. The instructions and procedures includ ed herein are intended for t he experienced repair te chni cians, and attention should be given to the preca uti ons on
the preceding page.

Contents

This manual consists of six chapters and Appendix.

CHAPTER 1.PRODUCT DESCRIPTIONS

Provides a general overview and specifications of the product.

CHAPTER 2.OPERATING PRINCIPLES

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

CHAPTER 3.TROUBLESHOOTING

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

CHAPTER 4.DISASSEMBLY AND ASSEMBLY

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

CHAPTER 5.ADJUSTMENTS

Provides Epson-approved methods for adjustment.

CHAPTER 6.MAINTENANCE

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

APPENDIXProvides the following additional information for

reference:

• Connector pin assignments

• Electric circuit boards components layout

• Exploded diagram

• Electrical circuit boards schematics

Symbols Used in This Manual

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

W ARNING

CAUTION

CHECK

POINT

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

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

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

Revision Status

Revision Issued Date Description

Rev. A May, 11 2000 First Release

Product Description

Overview....................................................................................................... 10

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

Basic Specification ....................................... ...... ....... ...... ....... ...... ................ 11

Printing Specification............................................................................... 11

Paper Specification ................................................................................. 12

Printable Area.......... ...... ...... ....... ...... ....... ...... ....... ...... ....... ...................... 15

PG Adjust Lever ...................................................................................... 16

Ink Cartridge............................................................................................ 17

Input Data Buffer ..................................................................................... 18

Electric Specification ............................................................................... 18

Reliability................................................................................................. 18

Safety Approvals ..................................................................................... 18

Acoustic Noise......................................................................................... 18

CE Marking (for 220V - 240V) ................................................................. 19

Environmental Conditions ....................................................................... 19

Interface Specification .................................................................................. 21

IEEE-1284 Parallel I/F (Forward Channel).............................................. 21

IEEE-1284 Parallel I/F (Reverse Channel).............................................. 22

EEE1284.4 Protocol................................................................................ 24

Miscellanea ............................................................................................. 25

Receive Data Buffer Full Operation ..............................................................25

Panel-less control & Status Indication..................................................... 25

Error Indication on Status Monitor 3 ......................................................... ....25

Status Monitor 3 function .............................................................................27

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

Physical Specification................................................................................... 29

Consumables and Options ........................................................................... 30

Operating Principles

Overview....................................................................................................... 32

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

Printhead................................................................................................. 33

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

Printing Method .............................................................................................34

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

Paper Feeding Mechanism ..................................................................... 36

Paper Loading Mechanism (ASF Unit).................................................... 37

Ink System Mechanism ........................................................................... 40

Pump Unit & Wiper mechanism ....................................................................40

Capping Mechanism ......................................................................................41

Ink Sequence .......................................................................................... 41

Printing model ......................................................................................... 43

Eectrical Circuit Operating Principles........................................................... 44

C367 PSB/PSE board............................................................................. 44

C367MAIN-B Board ........................... ...... ....... ...... ....... ...... ....... ...... ....... . 46

Main elements ................................................................................................46

Printhead Driver Circuit .................................................................................47

PF Motor (PF/ PUMP/ ASF Motor) Driver Circuit .......................................48

CR Motor Driver Circuit ................................................................................ 48

Reset Circuit ..................................................................................................49

EEPROM Control Circuit ..............................................................................49

Sensor Circuit .............................................................................. ...... ............50

Troubleshooting

Overview ...................................................................................................... 52

Unit Level Troubleshooting........................................................................... 56

Disassembly and Assembly

Overview ...................................................................................................... 68

Precautions ............................................................................................. 68

Tools ....................................................................................................... 69

Work Completion Check ......................................................................... 70

Disassembly................................................................................................. 71

Housing removal ......................... ....... ...... ....... ...... ....... ...... ....... ...... ....... . 72

Printhead removal........... ...... ...... ....... ...... ....... ...... .................................. 73

CR motor removal................................................................................... 75

Circuit board removal.............................................................................. 76

Waste drain ink pad unit removal............................................................ 79

PF motor removal.................................................................................... 80

LD Roller removal ................................................................................... 81

HP/PE/IC Sensor removal....................................................................... 84

Ink system unit removal (Cap & Pump unit )........................................... 86

Paper Eject Roller removal ..................................................................... 88

Paper feed roller removal........................................................................ 90

CR unit removal....................................................................................... 92

Disassembling ASF frame unit......... ....... ...... ....... ................................... 95

Adjustment

Overview....................................................................................................... 99

Required Adjustment............................................................................... 99

Adjustment Program feature ................................................................. 100

Adjustment Program Installation Procedure.......................................... 101

Adjustment Program Initial Setting menu.............................................. 102

Sequential Repair Service Program feature............................................... 103

Feature.................................................................................................. 103

Printhead removal ................................................................................. 105

Printhead replacement .......................................................................... 107

Main board replacement........................................................................ 110

CR unit replacement or removal............................................................ 114

CR motor replacement or removal ........................................................ 114

Printer mechanism replacement............................................................ 115

Waste ink pad replacement.................................................................. 115

Individual service adjustment program feature........................................... 116

Get status function ................................................................................ 116

Head cleaning function.......................................................................... 116

Initial ink charge function....................................................................... 116

Protection counter check/reset.............................................................. 116

EEPROM check function....................................................................... 117

Refurbishment for DOA......................................................................... 118

A4 Check pattern................................................................................... 119

EEPROM Address Map ........................................................................ 130

Component Layout........ ....... ...... ...... ....... ...... ....... ...... ....... ...... ....... ...... ...... 133

Exploded Diagram...................................................................................... 135

Parts List .................................................................................................... 140

Electrical Circuits........................................................................................ 143

Maintenance

Overview..................................................................................................... 121

Cleaning................................................................................................ 121

Service Maintenance........... ....... ...... ....... ...... ....... ...... ........................... 122

Lubrication............................................................................................. 123

Appendix

Connector Summary................................................................................... 128

Major Component Unit .......................................................................... 128

PRODUCT DESCRIPTION

CHAPTER

EPSON Stylus COLOR 480 Revision A

1.1 Overview

Stylus Color 480 is developed newly for th e low end pro duct and realize a high qu ali ty
graphic printing with the low price.

1.1.1 Features

Major features of this printer are as follows;

o High quality color printing

n

720dpi (H) x 720 dpi(V) dpi printing.

n

MACH technology (4 color printing. YMCK)

n

Micro wave, Super micro wave printing

n

Multi-Shot & Variable dot printing

o Control panel less

Host computer controls the printer.

o Built in I/F

n

IEEE-1284 parall el
Windows exclusive printer.

o Small, space-saving
o Built-in auto sheet feeder

n

Holds 100 cut-sheets (65g/m2)

n

Holds 10 envelopes

n

Holds 10 transparency films

n

Holds 30 special paper

Figure 1-1. External View

Product Description Overview 10

EPSON Stylus COLOR 480 Revision A

1.2 Basic Specification

1.2.1 Printing Specification

PRINTING METHOD

On demand i nk jet

o

NOZZLE CONFIGURATION

Black: 48 nozzles x 1 row

o
o Color: 45 nozzles x 1 row

15 nozzle is assigned for each 3 colors in the one row.
(Cyan, Mag enta, Yellow)

#B48

#Y15

2.2578(32/360")

PRINTING DIRECTION

o Bi-direction with logic s eeking

PRINTING SPEED

o Character mode: Refer to the table below

Table 1-1. Character mode: black only

Character pitch

10CPI LQ 80column 20IPS

Character

Quality

Printable

Columns

o Raster graphics mode: Refer to the table below.

Table 1-2. Printing Speed (Raster Graphics Mode)

Horizontal
Resolution

480 dpi 8.26 inch 3968 14.1 IPS B lack mode
360 dpi 8.26 inch 2976 20 IPS -­720 dpi 8.26 inch 5952 20 IPS --

Printable

Area

Available Dot CR Speed Notes

CR Speed

17

#Y1

#C 15

#M 15

#M 1

CHARACTER SPECIFICATION

Character code: None. International character sets is not available. Only following

o

characters are available.

n ASCII 37 characters + Space code + One Symbol

Alphabet A-Z (Code 41H-5AH)

0.21117 (1/120")

#B1

#C 1

unit: mm

Figure 1-2. Nozzle Configuration (Seen from the Back of the Head)

Number 0-9 (Code 30H-39H)
SPACE (Code 20H)
Symbol # (Code 23H)

n Typeface

Bit map LQ font: EPSON Courier 10CPI

Product Description Basic Specification 11

EPSON Stylus COLOR 480 Revision A

CONTROL CODE

o ESC/P for Stylus Color 480

EPSON Remote command

o

PAPER FEED SPECIFICATION

o Feeding Method: Friction feed with ASF
o Paper Path: Cut sheet ASF (Top entry - Front out)

o

Line Interval: Programmable by 1/6 inch or 1/360 inch

o Paper Feed Speed:

271.9ms 10 ms (10.16 mm (2/5 inch) at paper feed)

1.67inch/sec (at continuous paper feed)

1.2.2 Paper Specification

CUT SHEET

Size:

n

A4 (210 x 297 mm)
Letter (216 x 279 mm)
B5 (182 x 257 mm)
Legal (216 x 356 mm)
Statement (139.7mm x 215.9mm)
Executive (190.5 x 254 mm)

n

Thickness (plain paper):

0.08mm to 0.11mm(0.003 to 0.004”)

n

Weight:

2

64g/m

to 90g/m2 (17lb to 24lb / 55 to 78 kg)

n

Paper quality:
Exclusive paper, Bond paper, Plain paper, recycled paper

n

ASF hopper available capacity
100 sheets

CAUTION

n No wrinkled, scuffing, torn or folded paper be used.
n No curled paper more than 5mm be used.

Product Description Basic Specification 12

EPSON Stylus COLOR 480 Revision A

TRANSPARENCY, GLOSSY PAPER

Size

n

A4 (210mm x 297mm)
Letter (216mm x 279mm)

n

Thickness

0.075mm to 0.085mm

n

Quality
Exclusive paper

n

ASF hopper available capacity
1sheet

NOTE: Transparency printing is available only in the normal temperature

ENVELOPE

Size:

n

No.10 (241.3 mm x 104.8 mm)
DL (220 mm x 110 mm)
C6 (162 mm x 114 mm)
4”x 6”(220m m x 132mm)

CAUTION

INDEX CARD

n

n

n

n Use above mentioned paper at normal temperature.

(temperature = 15 to 25%, humidity = 40 to 60% RH)

n No wrinkled, scuffing, torn or folded paper be used.
n No curled paper more than 5mm be used.
n No paper with glue on flap be used.
n No double envelops nor with window envelops be used.
n Do not print on the back.

Size
A6 Index card (105mm x 148mm)
A5 Index card (148mm x 219mm)
5 x 8” Index Card (127mm x 203mm)
10 x 8” Index card (127mm x 203mm )

Thickness
Less than 0.23mm

ASF hopper available capacity
30sheets

n

Thickness

0.16mm to 0.52mm

n

Weight
45g/m2 to 75g/m2

n

Quality
Bond paper, Plain paper, Air mail

n

ASF hopper available capacity
10sheets

NOTE: * Envelope printing is available only in the normal temperature.

* Keep the longer side of the envelope horizontally at setting.

Product Description Basic Specification 13

EPSON Stylus COLOR 480 Revision A

n

SPECIAL PAPER

Paper type: EPSON exclusive paper

n

Photo Quality Ink Jet Paper
A4 (210 x 297 mm)
A6 (105 x 148 mm)*
B5 (182 x 257mm)
Letter (216 x 279 mm)
Legal (216 x 356 mm)
5 x 8” (127 x 203 mm)*1
8 x10” (100 x 148 mm)*1

n

360 dpi Ink Jet Paper
A4 (210 x 297 mm)
Letter (216 x 279 mm)

n

Transparencies *2)
A4 (210 x 297 mm)
Letter (216 x 279 mm)

n

Photo Quality Glossy Film*2)
A4 (210 x 297 mm)
A6 (105 x 148 mm)*1
Letter (216 x 279 mm)

NOTE: *1): Set the enclosed loading support sheet as the last sheet in the ASF.

Iron-ON Transfe r Paper
A4 (210 x 297 mm)
Letter (216 x 279 mm)

n

Matte Paper
A4 (210 x 297 mm)
Letter (216 x 279 mm)

n

High Quality Normal Paper
A4 (210 x 297 mm)

*2): Set the plain paper as the last sheet in the ASF.

CAUTION

Use above mentioned paper at normal temperature.
(temperature = 15 to 25%, humidity = 40 to 60% RH)

n

Photo Paper (PP2)
A4 (210 x 297 mm)
Letter (216 x 279 mm)
Photo quality card 2 (100 x 148 mm)*1
Panorama (210 x 594 mm)
4” x 6”(113.6 x 175.4)
100mm x 150mm
200mm x 300mm

n

Photo Sticker
A4 (210 x 297 mm)
A6 (105 x 148 mm)
8 “x 10” (100 x 148 mm)*1

Product Description Basic Specification 14

EPSON Stylus COLOR 480 Revision A

1.2.3 Printable Area

LM

CUT SHEET

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

RM

Table 1-3. Printable Area for Cut Sheet

Paper Size

A4 210mm 297mm 3mm

Letter 216mm 279mm 3mm

B5 182mm 257mm 3mm

Legal 216mm 356mm 3mm

Statement 139.7mm 215.9mm 3mm

Executive 190.5mm 254mm 3mm

Paper

Width

Paper

Length

LM/RM/TMBK Bottom

Margin(*1)

14 mm or more

than 3 mm

14 mm or more

than 3 mm

14 mm or more

than 3 mm

14 mm or more

than 3 mm

14 mm or more

than 3 mm

14 mm or more

than 3 mm

NOTE: *1): Bottom margin can be set up to 3mm at minimum when the paper

length is designated with “ESC(S” command.) However, the printing
quality is not guaranteed in the area ranging from 3mm to 14mm, from
the form lower end. When the paper length is not designated, the bottom
margin must be wider than 14 mm.

Color Bottom

Margin

(*1,*2)

21mm or more

than 3mm

21mm or more

than 3mm

21mm or more

than 3mm

21mm or more

than 3mm

21mm or more

than 3mm

21mm or more

than 3mm

TM

Printable area

n

PL

BM

Figure 1-3. Printable Area

*2): Bottom margin for color printing can be set up 3mm at minimum
when the paper length is designated with “ESC(S” command.). However,
guaranteed print area of color printing is narrow than BK
(monochrome)printing. This is due to the each color nozzles is assigned
in the one row nozzle s.

Product Description Basic Specification 15

EPSON Stylus COLOR 480 Revision A

ENVELOP (PRINTABLE AREA)

Refer to the following table.

LM

RM

Table 1-4. Printable area for Envelop

BK

Paper Size

#10 241mm 104.8 mm 28mm 3mm

DL 216mm 279mm 7mm 3mm

C6 182mm 257mm 3mm 3mm

Paper

Width

Paper

Length

LM RM/TM

Bottom

Margin(*1

)

14 mm or
more than

3 mm

14 mm or
more than

3 mm

14 mm or
more than

3 mm

Bottom
Margin

21mm or

more than

21mm or

more than

21mm or

more than

NOTE: *1): Bottom margin can be set up to 3mm at minimum when the paper

length is designated with “ESC(S” command.) However, the printing
quality is not guaranteed in the area ranging from 3mm to 14mm, from
the form lower end. When the paper length is not designated, the bottom
margin must be wider than 14 mm.

*2): Bottom margin for color printing can be set up 3mm at minimum
when the paper length is designated with “ESC(S” command.). However,
guaranteed print area of color printing is narrow than BK
(monochrome)printing. This is due to the each color nozzles is assigned
in the one row nozzle s.

Color

(*1,*2)

3mm

3mm

3mm

TM

Printable area

BM

Figure 1-4. Printable area for Envelop

1.2.4 PG Adjust Lever

Unlike other products, this printer dose not have the PG (Platen Gap) adjust lever in the
printer mechanism. So, the Platen Gap value can not be changed according to the paper
thickness.

Product Description Basic Specification 16

EPSON Stylus COLOR 480 Revision A

1.2.5 Ink Cartridge

INK CARTRIDGE (BLACK)

Type: Exclusive cartridge

o
o Color: Black
o Print capacity: 270 pages/A4 (ISO/IEC 10561 Letter Pattern at 360dpi)
o Ink life: 2 years from production date
o Storage temperature:

n

-30°C to 60°C
Being transported, within 120 hours at 60

n

-30°C to 40°C
Packing storage, within a month at 40

n

-20°C to 40°C
Mounted on the printer, within a month at 40

o Dimension: 19.8mm (W) x 52.7 mm (D) x 38.5mm (H)

°

C, within a month at 40°C

°

C

°

C

COLOR INK CARTRIDGE

Type: Exclusive car tridge

o
o Color: Magenta, Cyan, Yellow
o Print capacity: 150 pages/A4 (360dpi, 5% duty each color)
o Ink life: 2 years from production date
o Storage temperature:

n

-30°C to 60°C
Being transported, within 120 hours at 60

n

-30°C to 40°C
Packing storage, within a month at 40

n

-20°C to 40°C
Mounted on the printer, within a month at 40

°

C, within a month at 40°C

°

C

°

C

o Dimension: 42.9mm (W) x 52.7 mm (D) x 38.5mm (H)

52.7

51.2

52.7

19.8

38.5

18.3

51.2

42.9

41.4

38.5

Figure 1-6. Color Ink Cartridge

Figure 1-5. Black Ink Cartridge

Product Description Basic Specification 17

EPSON Stylus COLOR 480 Revision A

1.2.6 Input Data Buffer

o Buffer: 16Kbytes

1.2.7 Electric Specification

120V VERSION

Rated voltage: AC 120V

o
o Input voltage range: AC 99 -132V
o Rated frequency range: 50 - 60Hz
o Input frequency range: 49.5-60.5 Hz
o Rated current: 0.4A(Max 0.5A)
o Power consumption: Approx. 21W (ISO/IEI 10561 Letter pattern)

Approx. 5W in Standby mode
Energy star compliant

o Insulation Resistance: 10 M ohms min.

(between AC line and chassis, DC 500V)

o Dielectric Strength: AC 1000 V rms. 1 minute or

AC 1200 V rms 1 second
(between AC line and chassis)

o Leak Current: less than 0.25mA(input:100V/50Hz)

less than 0.75mA(input: 138V/60Hz)

o Power consumption: Approx. 21W (ISO/IEI 10561 Letter pattern)

Approx. 5.5W in standby mode
Energy star compliant

o Insulation Resistance: 10 M ohms min.

(between AC line and chassis, DC 500V)

o Dielectric Strength: AC 1500 V rms. 1 minute
o Leak Current : less than 0.75mA (input: 276V/60Hz)

1.2.8 Reliability

o Total print volume: : 10000 pages (A4.Letter) (except ESP,EIO,EPC)

: 20000 pages (A4, Letter) (ESP, EIO,EPC)

o Printhead Life: 4000 million dots/nozzle

.

1.2.9 Safety Approvals

120V VERSION

Safeties standards: UL1950 with D3

o

CSA C22.2 No.950 with D3

o EMI: FCC part15 subpart B class B

CSA C108.8 class B

220V -240V VERSION

220 - 240V VERSION

Rated voltage: AC 220 - 240V

o
o Input voltage range: AC 198 -264V
o Rated frequency range: 50 - 60Hz
o Input frequency range: 49.5-60.5 Hz

Safety standards: EN60950(VDE)

o

EN55022 (CISPR Pub.22) Class B

o EMI: EN55022 (CISPR Pub.22) Class B

1.2.10 Acoustic Noise

o Level Approx. 45dB(A) (According to ISO 7779)

o Rated current: 0.2A (Max. 0.3A)

Product Description Basic Specification 18

EPSON Stylus COLOR 480 Revision A

1.2.11 CE Marking (for 220V - 240V)

o Low Voltage Directive 73/23/eec : ENN60950
o EMC Directive 89/336/EEC : EN55022 Class B

: EN61000-3-2
: EN610000-3-3
: EN50082-1

IEC801-2
IEC801-3
IEC801 -4

1.2.12 Environmental Conditions

TEMPERATURE

Operating: 10 to 35°C (Refer to Figure 1-7)

o
o Non-operating: -20 to 60°C (with shipment container)

1 month at 40
120hours at 60

HUMIDITY

°C

°C

(%)

80

55

20

10 27 35

Figure 1-7. Environmental Condition

RESISTANCE TO SHOCK

Operating: 1 G, within 1ms (operating)

o

(”C)

tmphumid

Operating: 20 to 80% RH

o

without condensation, Refer to Figure 1-7

o Non-operating: 2G, within 2ms (with shipment container)

o Non-operating: 5 to 85% RH

without condensation, with shipment container

The environmental condition should be within the range shown in the figure below.

RESISTANCE TO VIBRATION

Operating: 0.15G

o
o Non-operating: 0.50G (with shipment container)

Product Description Basic Specification 19

EPSON Stylus COLOR 480 Revision A

CAUTION

n When non-operating, make sure the printhead is capped.
n When transporting, make sure the printhead is capped and keep

the ink cartridge mounted on the printer.

n Under the power OFF condition, if the printhead is not capped,

turn ON the printer after installing the ink cartridge, and turn
off the printer after the capping has completed.

n If the printer kept under -40

inside the ink cartridge will be frozen.
It takes 3 hours at 25
use.

°

C

°

C

, the ink inside the printhead and

to recover once frozen ink to be ready for

Product Description Basic Specification 20

EPSON Stylus COLOR 480 Revision A

1.3 Interface Specification

This printer has IEEE-1284 parallel interface and USB interface as standard.

1.3.1 IEEE-1284 Parallel I/F (Forward Channel)

Forward channel is the mode to transfer the ordinary printing command to the printer
side from the PC side.

Table 1-5. Parallel I/F Specification (F-Channel)

Item Specification

Transmission mode 8bit parallel
Synchronization By STROBE pulse supplied from the external
Handshaking By BUSY and ACKNLG signal
Signal Level TTL level (IEEE-1284-Level 1 device )
Adaptable connector 36 pin 57-3036 0 ( a mphenol) or equivalent

NOTE: I/F cable is recommended to be in minimum length.

The connector pin assignment is des cribed below . For these s i gnals descri bed in the
table, use the twist pair wire and connect the return side to the signal GND.

Table 1-6. Connector Pin Assignment and Signals (F-Channel)

Pin No.

1 19 -STROBE PC

Return

GND Pin

Signal

Name

From Function Description

The strobe pulse for the printer to read data.
Pulse width requires min. 0.5µs (500ns).
High at normal condition. Receives data after
shifting Low.

Table 1-6. Connector Pin Assignment and Signals (F-Channel)

Pin No.

11 29 BUSY Printer

12 28 PE Printer A high signal indicates paper-out error.

13 28 SLCT Printer

14 30 -AFXT PC Not used.

31 30 -INIT PC

32 29 -ERROR PC A low signal indicates printer error condition.

18 - Logic H -Printer

35 - +5V Printer

17 -

16, 33
19-30

15, 34 - NC - Not used.

36 30 -SLIN - Not used.

Return

GND Pin

- GND - Signal GND.

Signal

Name

Chassis

GND

From Function Description

A high signal indicates that the printer cannot
receive data. The signal becomes high under
the condition below;

-Receiving data.

-Error.

-Other I/F receiving data.

Always at high level. Pulled up to +5V via

1.0KΩ resistor.

The printer is initialized by the width of min.
50µs Low pulse input.

Always at high level. Pulled up to +5V via

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

1.0KΩ resistor.

- Printer chassis GND.

2-9 20-27 Data1-8 PC

10 28 -ACKNLG Printer

The DATA 1 through DATA8 signals
represent data bits 1-8, respectively.

A low signal indicates the printer can accept
data. Pulse width is 0.5 (default) or can be set
at 2µs.

Product Description Interface Specification 21

EPSON Stylus COLOR 480 Revision A

1.3.2 IEEE-1284 Parallel I/F (Reverse Channel)

Reverse channel is used to transfer the information data from the printer side to the PC
side.

Table 1-7. Parallel I/F Specification (R-Channel)

Item Specification

Transmission mode IEEE-1284 nibble mode
Synchronization Comply with the IEEE-1284 specification
Handshaking Comply with the IEEE-1284 specification
Logic Level TTL level (I EEE-1284-Le vel 1 device)
Data trans. timing Comply with the IEEE-1284 specification
Extensibility request data The printer responds affirmatively when the extensibility request

values are 00H or 04H;
00H: Request Nibble Mode Reverse Channel Transfer.
04H: Request Device ID;
Return Data Using Nibble Mode Reverse Channel Transfer

o Device ID

The printer sends following device ID string when it is requested.
[00H] [5AH]
MFG: EPSON;
CMD: ESCPL2, BDC, D4;(*1)
MDL: Stylus[SP]COLOR[SP]480;
CLS: PRINTER;
DES: EPSON[SP]Stylus[SP]COLOR[SP] 480;

(*1): When the D4 mode (IEEE1284.4) is OFF, printer reply as follows.
CMD: ESCPL2,BDC

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

MDL value depends on the EEPROM setting. Refer to Appendix.

The connector pin assignment is described in the table below. For these signals
described in the table, use the twist pair wire and connect the return side to the signal
GND.

Table 1-8. Connector Pin Assignment and Signals (F-Channel)

Pin No.

2-9 20-27 Data1-8 PC

10 28 PtrClk Printer Printer clock signal.

11 29

12 28

13 28

14 30 HostBusy PC Host busy signal.
31 30 -INIT PC Not used.

32 29

18 - Logic H Printer Pulled up to +5V via 3.9K ohm resistor.
35 - +5V Printer Pulled up to +5V via 3.3 K ohm resistor.
17 - Chassis - Printer chassis GND.

16, 33

19-30

15, 34 - NC - Not used.

36 30 1284-Active PC 1284 active signal.

Return

GND Pin

1 19 HostClk PC Host clock signal.

- GND - Signal GND

Signal Name From Function Description

The DATA 1 through DATA8 signals
represent data bits 1-8 respectively.

PtrBusy/

DataBit-3,7

AckDataReq/

DataBit-2,6

Xflag/DataBit-

1,5

-DataAvail/
DataBit-0,4

Printer

Printer

Printer

Printer

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

Acknowledge data req uest signal and
reverse channel transfer data bit 2 or 6.

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

Data available signal and reverse channel
transfer data bit 0 or 4.

Product Description Interface Specification 22

EPSON Stylus COLOR 480 Revision A

Following lists “Notes” when using the parallel interface.

o “Return GND pin” in the table means twist pair return and is connected to the

signal GND level.
For each signal, use the twist pair wire and connect the return side.
Also, these cables are shielded wires and it is effective means to connect to each
chassis GND in the center machine and printer for electrostatic noise.

o Refer to the timing chart for transmission timing of each signals.
o Do not perform data transmission ignoring -ACK or BUSY signals. (Perform the

data transmission after confirming that either -ACK or BUSY signal is Low)

o It is possible to perform the printing test including interface circuit without using

external equipment when 8-bit data signal (2-9 pin) is set to appropriate character
code (against GND, Open=”1”, Short=”0”) and connect then forcefully to -ACK
and -STRB. However, to perform this, “I/F selection” of EEPROM must be set to
“Auto”. Also, IEEE-1284.4 packet mode must be set Off.

The figure below shows the timing chart of the parallel interface.

DATA

/STROBE

BUSY

/ACKNLG

Data byte n Data byte n+1

t

hold

t

setup

t

ready

t

stb

t

busy

t

reply

t

ack

t

next

t

nbusy

timechart

Figure 1-8. IEEE1284 Timing Chart

Table 1-9. IEEE1284 Timing Chart

Parameter Minimum Maximum

tsetup 500ns --

thold 500ns ---

tstb 500ns ---

tready 0 ---

tbusy 0 ---

tt-out (*1) --- 120ns

tt-in (*2) --- 200ns

treply 0 ---

tack 500ns 10us

tnbusy 0 ---

tnext 0 ---

(1*): Rise and fall time of every output signals.
(*2): Rise and fall time of every input signals.

On the above timing chart, T
transmission speed below.

Table 1-10. t

Parallel I/F Mode Typical Time

High speed 2 µs

Normal speed 4 µs

rated period is varies depend on the Parallel I/F data

ack

Typical time of T

act

ack

Product Description Interface Specification 23

EPSON Stylus COLOR 480 Revision A

1.3.3 EEE1284.4 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 command with
another device at the same time across a single point-to-point link. The protocol is not,
however. a device control language. It dose 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
IEEE1284.4.
Three function modes of IEEE1284.4 protocol, “On”, “Off” and “Auto” are available
for Parallel I/F, and the setting is defined based on the data stored in the value in
EEPROM address 25<H>.

o On

Communication in IEEE1284.4 packet mode is starte d by receiving a magic s tring
(1284.4 synchronous commands). Until a magic string is received, other
commands are discarded. In this setting, the printer can not communicate with
DOS or Windows 3.X environment.

o Off

Communication is carried out in the conventional mode. A magnetic string
(1284.4 synchronous commands) is discarded. And only IEEE1284 nibble
protocol is available.

o Auto

Communication is carried out in the conventional mode until a magic string
(1284.4 synchronous commands) is received. By receiving a magic string,
communication in IEEE1284.4 packet mode is started. If the printer dose not
receive a magic string, the printer communicates the PC by IEEE1284 nibble
mode.

The factory setting for IEEE1284.4 mode is “ON”. But, after complete the initial ink
charge operation, the setting of the EEPROM is set to “AUTO”. The change in this
setting will be effective when the power is back on after the initial ink charge
operation.

Product Description Interface Specification 24

EPSON Stylus COLOR 480 Revision A

1.3.4 Miscellanea

1.3.4.1 Receive Data Buffer Full Operation

Generally, hosts abandon data transfer to peripherals when a peripheral is in busy state
for dozens of seconds continuously. In order to prevent the long busy status, printer
start receive the data every 1 secon d when the reset of the input buf fer become less than
several hundreds of byt es. The printer will be in busy state continuously when the input
buffer finally gets full. This operation is not IEEE 1284.4 protocol

.

1.3.5 Panel-less control & Status Indication

On this product, the control panel is not assembled in. So, Printer driver utility (STM39
allows to control the printer operation instead of the Control panel and indicates the
printer status include the several errors.

1.3.5.1 Error Indication on Status Monitor 3

Following printer status is displayed in the STM3 (Status monitor 3).

o Ink End/Low Error

When the printer is in the ink end or low condition, the STM3 displays the status.
If the “How to” button is clicked, the Ink Cartridge Replacement Utility runs and it
reads the ink cartridge replacement procedure step by step.

Figure 1-9. Ink low error indication

Figure 1-10. Ink out error indication

Product Description Interface Specification 25

EPSON Stylus COLOR 480 Revision A

o

Paper out Error

When the paper is not loaded correctly from the ASF to the PF roller, this error is
displayed on t he STM3.

Fatal Error

o

When the general error has occurred, this error is displayed on the STM3.
For example, circuit damage, motor damage...etc.

Figure 1-11. Paper out error indication

Paper jam error

o

When the paper is jammed between the PE sensor and the Paper eject roller, this
error indication is displayed on the STM3.

Figure 1-12. Paper jam error indication

Figure 1-13. Fatal Error indication

Maintenance Error

o

When the waste ink counter reaches to the specific counter value, this error is
displayed on the STM3.

Figure 1-14. Maintenance Error indication

Product Description Interface Specification 26

EPSON Stylus COLOR 480 Revision A

o

Communication Error

When the printer can no t communicate with PC, this message is displayed on the
STM3.

1.3.5.2 Status Monitor 3 function

STM3 in the Printer driver utility allows to perform the following functions.

o Nozzle Check Pattern printing

The printer prints the nozzle check pattern and the 6 digits code of the
firmware version & 6 digits code of the CPU Mask version.

o Head cleaning
o Bi-d adjustment patter printing
o Print head alignment adjustment
o Cancel the Paper out error

When the paper is not loaded correctly, STM3 (status monitor 3) display the

following message and the Paper Error can be canceled by clicking the

Figure 1-15. Communication error indication

“Continue” button in the STM3.

“Paper is not loaded correctly. Reload the paper, then click the “Continue”

button. Click “Cancel” to stop any print jobs.”

o Cancel the Paper jam error

When the paper is jammed, STM3 display the following message and printer
attempt to eject the Jammed paper by clicking the “EJECT” button.
“Paper is jammed”. Click the “Eject” button to eject any jammed paper.
If paper is still jammed inside the printer, click the “Stop” button, open the
printer cover and remove the paper. Then close the printer cover and click
the “Reset” button.
Moreover, if the “Stop” button is clicked, the printing is stopped and the
“Reset” button is displayed. If once the “Reset” button is clicked, the printer
setting is reset.

o Ink Cartridge Exch ange utility

According to the procedure displayed, I/C can be replaced. In this function,
CR moves to the I/C replacement position automatically and turn back to the
home position after setting the I/C in the CR unit. This function is always
available, not only Ink end or low condition.

o Printer Setup utility

This utility instructs the printer set up procedure (I/C setting procedure) and
print the nozzle check patter and head cleaning. Additionally, printhead
alignment pattern is printed and allow the user to adjust the bi-d printing
alignment.

Product Description Interface Specification 27

EPSON Stylus COLOR 480 Revision A

1.3.6 Initialization

The printer have 3 types of initialization. The initialization operations executed by each
initialization method are described below.

HARDWARE INITIALIZATION

This printer initializes itself when it is turned power on or printer recognized the Reset
command (D4 command). On this initialization, following actions are performed.

n

Initialize printer mechanism

n

Clear the input data buffer

n

Clear the print buffer

n

Set default values

SOFTWARE INITIALIZATION

Initialization command, “ESC@” also initializes the printer.
On this initialization, following actions are performed.

n

Clear the print buffer

n

Set default values

POWER ON INITIALIZATION EXCEPT I/F

This printer initializes itself when the printer receive the IEEE1284.4 reset command
or the Parallel I/F cable is disconnected /connected.
On this initialization, following actions are performed.

n

Initialize printer mechanism

n

Clears the input data buffer

n

Clears the print buffer

n

Sets default values except I/F setting.

Product Description Interface Specification 28

EPSON Stylus COLOR 480 Revision A

1.4 Physical Specification

DIMENSIONS

Stylus Color 480: 431 mm (W) x 311mm (D) x 271mm (H) (Printing)

n

(

311mm

271mm

431mm

Figure 1-16. Stylus Color 480 Dimensions

WEIGHT

Stylus Color 480: 3 .0k g (without the ink cartridges)

n

Product Description Physical Specification 29

EPSON Stylus COLOR 480 Revision A

1.5 Consumables and Options

CONSUMABLE

The consumable for this printer are following;

Table 1-11. Consumables

Classification No. Name

Consumables

S020187 Ink Cartridge (bla ck )
S020193 Ink Cartridge (color)

ENCLOSED PARTS

The following parts are enclosed in the Production.

Table 1-12. Enclosed parts

Enclosed Parts Quantity

User’s manual 1 (paper + CD-ROM)

Driver DISK 1(CD-ROM)\
Black ink cartridge 1
Color Ink cartridge 1

Power Code 1(220-240V version only) *1

NOTE: *1: On the 100-120V versi on p roduct , t h e pow er cable i s so lder ed on t he

PS board directly.

Product Description Consumables and Options 30

OPERATING PRINCIPLES

CHAPTER

EPSON Stylus COLOR 480 Revision A

2.1 Overview

This section describes the operating principles of the printer mechanism and electrical
circuit boards. The Stylus COLOR 480 has only the following two circuit boards and
dose not have control panel:

o

Main board: C367MAIN-B (or C367MAIN) *1

o

Power supply board: C367 PSB/PSE

NOTE: *1): C367MAIN board is used for the product in the first mass

production an d it w ill b e cha nged t o C 367 MAIN-B board at an earl y
date. The major difference is that C367MAIN-B has one chip CPU
which include the ASCI function. This section describes the operation
principle of C367MAIN-B.

2.1.1 Printer Mechanism

The printer mechanism for Stylus COLOR 480 is designed newly. But, the basic
component of the printer mechanism is same as previous product.
This printer consists of Print Head, Carriage Mechanism, Paper Feeding Mechanism,
Paper Loading Mechanism, Ink System (Pump Mechanism, Cap Mechanism, and
Carriage Lock Mechanism).

Like other EPSON ink jet printers, the Stylus COLOR 480 is equipped with two
stepping motors; one for ASF, Paper feeding/ Pump mechanism, and one for CR
mechanism. ASF unit uses rear entry front eject system. This ASF unit is also des igned
newly and single LD roller loads the paper to the printer mechanism.

For cap assembly, Stylus COLOR 480 uses valveless mechanism; new design for this
model.

Paper Eject Roller

Star Wheel Roller

CR unit

Cap Assembly

CR lock lever

PF Roller

CR Timing belt

HP/PE/IC Sensor

LD Roller

Paper feed back plate

Paper separation pad

ASF Hopper Spring

Clutch mechanism

PF Motor

Pump Assembly

CR Motor

Figure 2-1. Printer Mechanism block diagram

Operating Principles Overview 32

EPSON Stylus COLOR 480 Revision A

2.1.2 Printhead

The printhead uses a new developed U-CHIPS head and Stylus COLOR 480 can
perform multiple shot printing and variable printing. Printhead nozzle configuration is
as follows.

n

48 nozzles x 1 row: Black (nozzle pitch of the row: 1/120 inch)

n

45 nozzles x 1 row: Color (nozzle pitch of the row: 1/120 inch)
In the one row for the color, 15 nozzles are assigned for each yellow, magenta,
cyan color)

The basic operating principles of the printhead, which plays a major role in printing,
are the same as previous models; on-demand method which uses PZT (Piezo Electric
Element). In order to uniform the amount of ejecting ink, the printhead has its own
head ID (6 digits for this printhead) which adjust PZT voltage drive features.
The printhead stores the head ID to EEPROM and generates appropriate PZT drive
voltage to prevent amount of ink from varying by printheads.

Following explains printhead basic components.

o PZT

PZT is an abbreviation of Piezo Electric Element. Certain amount of voltage
expands and contracts PTZ. The dri ve wave generated o n MAIN board driv es PZT
and PZT pushes the top cavity which has ink stored to disc harge the ink fr om each
nozzle on the nozzle plate.

Nozzle Plate

Head Driver Board

Ink Cartridge

PZT

Needle

Filter

Cavity

Figure 2-2. Printhead Sectional Drawing

o Ink Cavity

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

o Nozzle Plate

The board with nozzle holes on the printhead surface is called Nozzle Plate.

o Filter

When the ink cartridge is installed, if any dirt or dust around th e cartridge needle is
absorbed into the head, there is a great possibility of causing nozzle clog and
disturbance of ink flow, and finally causing alignment failure and dot missing. To
prevent this problem, a filter is set below the cartridge needle, wh ere ink is filtered.

Operating Principles Overview 33

EPSON Stylus COLOR 480 Revision A

2.1.2.1 Printing Process

This section explains the process in which the printheads of On- Demand inkj et printers
eject ink from each nozzle.

1. Normal State:

When no printing signal is sent from PC, or no PZT drive voltage is applied, PZT
does not change shape, therefore PZT does not squeeze the cavity. Ink pressure
inside the cavity is kept normal. (Refer to Figure 2-3.)

2) Ejecting State:

When the print signal is output from the C367MAIN-B board, IC (Nozzle
Selector) located on the printhead unit latches data once by 1-byte unit. An
appropriate PZT latched by the nozzle selector is pushed into the cavity by the
common voltage applied from the main board. By this operation, ink stored in the
cavity spurts out from nozzles.(Refer to Figure 2.1.2.2.)

Ink Path

Nozzle

PZT

Ink Cavity

Nozzle plate

2.1.2.2 Printing Method

For print dot system, Stylus COLOR 480 has the following two kinds of printing
modes.

n

Multiple shot printing

n

Variable dot printing

The above two printing modes are automatically selected depending on the media and
the resolution setting of the printer driver. The following explains each printing mode.

o Multiple shot printing

This printing mode is developed to improve the print quality on plain paper or
transparencies in low resolution. The multiple shot printing mode uses normal dot
and the number of dot shots varies from 1 shot to maximum 4 shots depending on
the print data to enable sharp image output even in a low resolution.

o Variable dot printing

This printing mode is developed to improve the print quality on exclusive paper.
This mode is basically the same as variable dot printing mode used on other
products /; micro dot, middle dot, and large dot compose this mode. Print dot size
varies according to print data and this mode enables even sharper im age ou tput o n
exclusive paper.

PZT drive voltage

Figure 2-3. Printhead printing process

Operating Principles Overview 34

EPSON Stylus COLOR 480 Revision A

2.1.3 Carriage Mechanism

The carriage mechanism consists of Carriage motor (CR motor), Carriage unit
(including printhead), CR timing belt, CR guide shaft, CR guide frame, CR home &
I/C detector (HP/PE/IC sensor) etc. The carriage mechanism moves the carriage back
and forth according to the dr ive from the carriage motor. Th e following steppi ng motor
is mounted to drive CR mechanism. (See the table below.)

Table 2-1. Carriage Motor Specification

Items Specifications

Type 4-Phase/ 48-Pole PM Stepping motor
Drive Voltage +42 V +/ - 5% (DRV IC voltage)
Coil Resistance 10.8 Ω +/ - 10% (per phase at 25 degree)
Inductance 15 mH +/ - 20%(1KH 1VmA)
Drive Method Bi-Polar drive
Driver IC LB1845

The drive from CR motor is transferred to the CR unit via CR timing belt. And the CR
home position is detected with the HP/PE/IC sensor. This sensor is available as CR HP
detector only in the HP (home position) detection sequence & pump operation
sequence. (not available in the paper feeding sequ ence fo r the C R HP detector becaus e
it is used for only PE sensor during the paper feeding sequence.) Moreover, unlike the
previous products, this printer dose not have the PG adjustment mechanism (1.7mm).

CR home position is detected with the HP/PE/IC sensor and the d etection plate molded
in the CR unit as following figure. When the CR home position is detected with this
sensor, HIGH signal is output to the CPU.

HP/IC detection Lever

CR HP detection plate

Low signal

Right side view

CR HP detection plate

HP/IC detection Lever

High signal

Figure 2-5. CR home position

Unlike the previous products, I/C detection sensor is not built in the CR unit.
The I/C is detected with the HP/PE/IC sensor and the detection plate mo lded on the I/C
cover as following figure. The I/C installation condition is monitored only when the
CR unit moves to the I/C detection position (HP detection sequence). So, this sensor
function is not available in the paper feeding sequence. When the I/C is not installed
into the CR unit, HIGH signal is output to the CPU.

HP/IC detection Lever

Right side view

CR unit

HP/PE/ICSensor

CR Guide shaft

CR Motor

CR Timing belt

I/C dete ction plate

HP/IC detection Lever

I/C detection plate

Figure 2-6. I/C detection position (

Low signal High signal

Figure 2-4. Carriage Mechanism (Top view)

Operating Principles Overview 35

EPSON Stylus COLOR 480 Revision A

2.1.4 Paper Feeding Mechanism

The paper feeding mechanism consists of Paper feed motor (PF motor), PF roller,
Paper eject roller, Star wheel roller, and so on. The paper feeding mechanism feeds
paper loaded from ASF using the PF roller and Paper Eject Roller & Star wheel roller.
For this mechanism, the PF motor mentioned in the right Table 2-2 is used on this
product.

The drive of the PF motor is transfer to the PF roller and the Paper Eject Roller as
following Figure 2-7. Following shows you how to transfer the PF motor drive to the
PF roller and the Paper Eject Roller.

o PF motor drive transmission path

PF Motor Pinion Gear (CW)

9.6, 33.6(CW)

→

Spur Gear 15 (PF roller)(CCW) → Spur Gear 34.2 (CW)

(CCW)

Top view

HP/PE/IC Sensor

→

Combinatio n Gear 8.4, 21.6 (CCW) → Combination Gear

→

Spur gear 15

Right side view

PF Motor

Paper Guide

Roller

Star Wheel

Combination

Gear 12.6, 18.4

Spur Gear 15

(PF Roller)

Spur Gear 34.2

Table 2-2. PF Motor Specifications

Item Description

Motor type 4-Phase/ 48-Pole PM Stepping motor
Drive voltage +42 V +/ - 5% (DRV IC voltage)
Coil Resistance 10 Ω +/ - 10% (per ph ase)
Inductance 10.5 mH +/ - 20%(1kH 1Vrms)
Driving method Bi-Polar drive
Driver IC LB1845

Non paper

Spur Gear 35.2

HP/PE/IC

Sensor

Change

Lever

Combination
Gear 22.4, 32

Feeding Paper

PE Sensor Lever

Paper

Combination Gear 11.2, 32.4

Paper Eject RollerPaper Feed Roller

Spur Gear 15.2

Spur Gear 15

Combination Gear 9.6,33.6

PF Pinion Gear

Combination Gear 8.4, 21.6

Low signal High signal

Figure 2-7. Paper Feeding Mechanism

Paper loaded from ASF is advanced by the following roller.

o Paper feed roller & Paper guide roller (assembled on the Top Frame) → Paper

eject roller & Star wheel roller (assembled on the Paper eject frame).

Additionally, the top & end of the paper is detected with the HP/PE/IC sensor.
In case the PE sensor dose not detect the paper in the paper loading sequence, the
printer detects the “Paper out error”. If the paper is detected after complete the paper
eject sequence, the printer detects the “Paper jam error”.

Operating Principles Overview 36

EPSON Stylus COLOR 480 Revision A

2.1.5 Paper Loading Mechanism (ASF Unit)

Transfer the PF motor drive to LD roller

The Paper loading mechanism is positioned at the printer rear. The Paper loading
mechanism loads paper at the ASF unit and feeds paper to the PF roller.

This ASF unit was designed newly for this product and consists of LD roller, Pad
holder (Paper return plate), ASF Frame, Hopper, and so on.
For the major feature of this ASF unit, ASF HP sensor is not used and the single LD
roller is built in the ASF unit.
Drive sent from the PF motor is always transmitted to the ASF unit side. But, the
Change lever and the Clutch mechanism switch ON/OFF the PF motor drive to the LD
roller with the motor rotational direction.

Drive from the PF motor is transmitted to the ASF unit as described below:

o Switch the PF motor drive to ASF unit side

PF Motor pinion gear rotates CCW direction with a specific st eps
Gear 8.4, 21.6 (CW)
rotates (CCW)

→ Combination Gear 11.2, 32.4 (CCW) → Change Lever

→ Release the Clutch mechanism lock position

Following Figure 2-8 shows you the switching path for PF motor drive to ASF unit
side.

Top View

Spur Gear 35.2

Right side view

→ Combination

Combination
Gear 22.4, 32

o

PF Motor pinion gear rotates CW direction

→ Combination Gear 11.2, 32.4 (CW)→ Change Lever rotates (CW) →

Combination Gear 22.4, 32 (CCW)

→ Spur Gear 35.2(CW) (include the clutch

mechanism) → LD roller (CW).

Following Figure 2-9 shows the PF motor drive transmission path to the LD roller unit
built in the ASF unit. The LD roller is assembled on the same shaft that the Spur gear

35.2 is assembled.

Top View

Change Lever

→ Combination Gear 8.4, 21.6 (CCW)

Right side view

Spur Gear 35.2

Combination

Gear 8.4, 21.6

PF pinion gear

Combination

Gear 11.2, 32.4

Combination
Gear 22.4, 32

Figure 2-9. PF motor drive transmission path

Change Lever

When the PF motor torque is switched to the ASF unit side by the clutch mechanism,
the function of the ASF mechanism varies depending on the rotational direction of the
PF motor, as shown in the table below.

Combination

Combination

Gear 8.4, 21.6

PF pinion gear

Gear 11.2, 32.4

Figure 2-8. Switch the PF motor drive to ASF unit side

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

Directions Corresponding Functions

Clockwise (*1)
Counterclockwise (*1)

• Picks up and loads paper

• Release the DE lever & Clutch mech anism

(*1): The PF Motor rotational direction = seen from the right side of the printer.

Operating Principles Overview 37

EPSON Stylus COLOR 480 Revision A

o

Clutch Mechanism

Unlike the previous products, this product dose not have a ASF HP sensor.
Instead of the ASF HP sensor, Change lever and the Clutch mechanism are used to
detect the ASF home position. Following figures describe the mechanism.

NOTE:

The Clutch gear is molded on
the back side of the Spur gear

35.2 such as Combination gear.

Spur gear 35.2

Change Lever

Clutch lever

Step1

Clutch gear

Figure 2-10. Disengage & Clutch mechanism

The Clutch mechanism transmits the PF motor drive to the LD roller shaft only when
the Clutch gear rotates CW direction after the Change lever releases the Clut ch lever. If
the Clutch gear rotates CCW direction, the PF motor drive is not transmitted to the LD
roller. This is due to the combination of the shape of the Clutch gear and the Clutch
lock tooth su ch as described on the figure.

1. When the paper is advanced with the PF roller, the Change lever is set on the Clutch
lever and the Clutch is pushed down as above Step1’s figure. As the result, the Clutch
gear (*1) is released from the Cluck lock tooth and the drive from the PF motor is not
transmitted to the LD roller shaft.

Clutch

Step2

Tension spring 0.143

Clutch lock tooth

Step3

LD roller shaft

o Paper Return Plate (Pad holder)

Unlike the previous products, The Paper return plate is built in the ASF frame instead
of the Paper return lever. The Paper separation pad is also stacked on the plate.
It works with the spring force of the Torsion spring 28.9 (mounted in the ASF frame)
as following figure.

LD roller

Paper Return

Plate

Hopper

2. When the PF pinion gear rotates CCW direction in the above Step2’s figure, the
Change lever moves to the left direction with the CCW rotation of Combination gear

11.2, 32.4. The Clutch turns back to the engagement position by the tension force of
the Tension spring 0.143 and the Clutch gear is engaged with the Clutch lock tooth as
above Step2’s cente r figur e.

ASF frame

Torsion spring 28.8

Figure 2-11. Paper Return Plate

Compression spring 2.67

3. When the PF pinion gear rotates CW direction in the above Step3’s figure, the Change
lever moves to the right direction with the CW rotation of the Combination gear 11.2,

32.4. And the drive from the PF motor is transmitted to the LD roller shaft via Clutch
gear and Clutch lock tooth.

The Paper return plate is set to return the paper to the paper stand-by position in the
ASF unit when the ASF unit is in the standby mode. When the paper is fed with the
LD roller, the Paper return plate is stored in the ASF frame by the LD roller.

4. The LD roller shaft rotates about 360 degree and the Change lever push the Clutch
lever and the PF motor drive is interrupted. This position is the ASF home position.

Operating Principles Overview 38

EPSON Stylus COLOR 480 Revision A

.

Following figures show you the ASF paper loading sequence and the operation of the
each mechanism.

When the paper is advanced with
the PF roller, Change lever push
down the Clutch lever as right
figure and the Clutch lock tooth is
disengaged from the Clutch gear.
As the result, the drive from the PF
motor is interrupted and the LD
roller dose not rotate.
This position is the ASF home
position.
The Paper return plate is set to
avoid that the paper is slipped
down from the paper set position.

The PF motor pinion gear rotates
CW direction and the drive from the
PF motor is transmitted to the ASF
LD roller shaft through the Clutch
lock tooth and the Clutch gear.
The ASF hopper release lever rotates
with the ASF LD roller and release
the ASF Hopper. The ASF hopper is
pushed with the Compression spring

2.67 and the paper is picked up with
the ASF LD roller.

LD roller

LD roller shaft

Paper return plate

Clutch lever

PF motor pinion

gear CW rotation

ASF Hopper
release lever

Step 1

Change lever

Step 3

Clutch gear

Clutch lock tooth

Clutch

LD roller shaft

Hopper

Compression

spring 2.67

Printer front si de

PF motor pinion

gear CCW rotation

ASF Frame

Step 2

Tension spring 0.143

Step 4

Paper return plate

When the paper is loaded (pick up) from
the ASF unit, the Change lever moves to
the printer front side with the CCW
rotation of the PF motor pinion gear and
releases the Clutch lever. As the result,
the Clutch turns back to the engagement
position by the tension force of the
Tension spring 0.143.
And the Clutch lock tooth is engaged
with the Clutch gear as right figure.

The ASF LD roller rotates CW direction
moreover and the Paper return plate is
stored under the ASF frame.
The paper is advanced up to the PF roller
and the ASF LD roller & the clutch rotate
to the “Step1” position. The Clutch lever
is locked with the Change lever.
The drive from the PF motor is
interrupted and the drive is transmitted to
the PF roller side.

PF motor pinion

gear CW rotation

ASF hopper
release lever

PF motor pinion

gear CW rotation

Figure 2-12. ASF Paper Loading Sequence

Operating Principles Overview 39

EPSON Stylus COLOR 480 Revision A

2.1.6 Ink System Mechanism

Ink system mechanism consists of pump unit (include the CR lock lever) and capping
mechanism. Ink system mechanism drives the pump unit that presses cap to the
printhead and ejects ink from ink cartridge, head cavity and cap to the waste ink pad.

2.1.6.1 Pump Unit & Wiper mechanism

The pump unit is driven by PF motor. PF motor drive is always transmitted to the paper
feeding mechanism and pump unit through the following gears. Refer to the Figure
2-14.

PF Motor Pini on Gear (CW)

9.6, 33.6 (CW) → Spur Gear 15 (PF Roller Gear) (CCW) → Spur Gear 34.2 (CW) →

gear 15 (CCW)

→ Combination Gear 12.6, 18.4 (CW)→ Spur Gear 15.2 (CCW)

(Pump unit)

The Pump unit and Wiper mechanism drives according to the PF motor rotational
direction, as shown in the right table.

→ Combination Gear 8.4, 21.6 (CCW) → Combination Gear

Spur

Table 2-4. PF motor rotational direction & Ink System Mechanism

Directions Functions

• Sets the wiper.

Counterclockwise (*1)

• Absorbs ink by the pump unit

• Set the CR lock lever

Clockwise (*1)

• Resets the wiper.

(*1): The PF Motor rotational direction = seen from the right side of the printer.
Following figure shows the overview of the pump mechanism operation.

Figure 2-13. Pump mechanism

PF Motor

Spur Gear 15

(PF Roller)

Spur Gear 34.2

Combination Gear 9.6, 33.6

Paper Guide

Roller

PF Pinion Gear

Combination Gear 8.4, 21.6

Wiper

CR lock lever

Pump unit

Cap unit

Combination

Gear 12.6, 18.4

Spur Gear 15.2

(Pump unit)

Star Wheel

Spur gear 15

Figure 2-14. PF motor drive transmission path to the Pump unit

Operating Principles Overview 40

EPSON Stylus COLOR 480 Revision A

2.1.6.2 Capping Mechanism

The capping mechanism covers the p rintheads with the cap holder to p revent the nozzle
from increasing viscosity when the printer is in stand-by mode or when the printer is
off. This product has valveless cap system. Air valve function used for the previous
models pumps and ejects ink only inside the cap by absorbing ink with the valve open.
By opening the Air valve, the negative pressure is decreased and only the ink inside the
cap is ejected. (the ink is not absorbed from Ink cartridge or head cavity.)
But, valveless cap system, this operation is done out side of the capping area.
The CR moves to left side of the Cap assembly and the pump abs orbs the in k inside the
cap.

Viewed from front side

CR unit

Slider cap

Printhead

Cap

Slide up

Waste Ink tube

2.1.7 Ink Sequence

o Initial ink charge

After the product is purchased and the printer is turned on for the first time, the
printer must be performed the initial ink charge and charges ink inside the head
cavity. When the initial ink charge is completed properly, the printer releases the
flag inside the EEPROM and no initial ink charge will be performed next time the
power is turned on. Stylus COLOR 480 takes 110 seconds to complete the initial
ink charge sequence and consume about half of the brand-new black ink cartridge.

o Manual Cleaning

Unlike the previous models, the manual CL is available only though the utility
included in the printer driver because this printer dose not have control panel.
Stylus COLOR 480 provides three types of manual cleaning to clean air bubbled
or clogged ink with viscosity or foreign substances.
The following manual CL sequences can be executed by the utility included in the
printer driver.

n

CL1

- Ink absorption
Black Ink: 0.21ml, Color Ink: 0.21ml

-Wiping operation
Wipes nozzle plate by the rubber part on the right half of the wiper.

-Flashing operation
Prevents color from mixing. Stabilizes ink surface inside the nozzle.

n

Figure 2-15. Cap Mechanism

CL1’

- Ink absorption
Black Ink:1.02ml, Color Ink: 1.02ml

-Wiping operation
Wipes nozzle plate by the rubber part on the right half of the wiper.

-Flashing operation
Prevents color from mixing. Stabilizes ink surface inside the nozzle.

Operating Principles Overview 41

EPSON Stylus COLOR 480 Revision A

n

CL2

o Flashing

- Ink absorption
Black Ink: 0.51ml, Color Ink: 0.51ml

-Wiping operation
Wipes nozzle plate by the rubber part on the right half of the wiper.

-Flashing operation
Prevents color from mixing. Stabilizes ink surface inside the nozzle.

The above mentioned manual CL is executed by performing nozzle check pattern and
manual CL alternately. The cleaning order is CL1
Like the previous products, CL1 is selected automatically and performed in case any
print check is not executed between each manual C L. Additionally, if the manual CL is
performed with over 5 pages printing cycle, CL1 is always selected and performed.

Additionally, if either black or color I/C is ink low or end condition, any manual
cleaning is prohibited and it is displayed on the STM3.

→ CL1’→ CL2→ CL1.

o Timer Cleaning

Unlike the previous product, this printer dose not have Timer IC andLithium battery
which is used for the backup power source for Timer IC. So, this printer manages the
printer off period or cleaning cycle by using the following method.

The printer driver sends the time command to the printer every D4 command
transportation. The time command is generated based on the PC’s timer and it consists
of year and month, date, hour, minutes, second. As soon as the printer receives the
time command from the printer driver, it is compared with the latest cleaning time
which is stored in the 6A<H>, 6B<H> address of the EEPROM. And if the timer
cleaning period is over the specific period, the printer perform the timer cleaning
automatically and store the time command in the 6A<H>,6B<H> address of the
EEPROM. In case the timer cleaning period is not over the specific period, the time
command is not stored in the EEPROM and it is abandoned. Maximum 0.48ml of the
ink is consumed in the Timer cleaning. (0.24ml of each black and color ink is
consumed.)

This printer performs the following two kinds of the Flashing for the following
purpose.

n

Periodical Flashing
This is due to avoid the increment of both ink’s viscosity in the printhead nozzle
during the continuous printing and the specific small amount of the ink is ejected
in the cap based on the periodical flashing timer.

n

Periodical large amount Flashing
This is due to avoid the increment of black ink’s viscosity in the printhead nozzle
during the continuous printing and large amount of the ink is ejected in the cap
based on the periodical large mount flashing timer.

Operating Principles Overview 42

EPSON Stylus COLOR 480 Revision A

2.1.8 Printing mode

The print resolution and printing method are determined automatically by setting the
media type and print quality (It is able to set by slider bar) in the printer driver as
following table. Following table show you the detail setting in the “Auto” mode.

Print media Slide bar Resolution Print mode

Table 2-6. Printing mode for Black mode

High

Speed*1

Micro
weave

Dot size*2

Table 2-5. Printing mode for Color mode

Print media Slide bar Resolution Print mode

Speed 120 x 120 Economy ON OFF ND-3dot

Plain paper

360 dpi Ink jet
paper

Photo Quality
ink jet paper

Matte Paper-
Heavyweight

Photo paper

Photo Quality
Glossy Film

Ink Jet
transparencies

Default 360 x 360 Normal 360 ON ON MSD2

Quality 720 x 720 Photo 720 ON ON VSD 6pl

N/A 360 x 360 Normal 360 OFF ON MSD2

Default 360 x 720 Fine 360 OFF ON MSD2

Quality 720 x 720 Photo 720 OFF ON VSD 6pl

Default 360 x 720 Fine 360 OFF ON MSD2

Quality 720 x 720 Photo 720 OFF ON VSD 6pl

Default 360 x 720 Fine 360 OFF ON MSD2

Quality 720 x 720 Photo 720 OFF ON VSD 6pl

N/A 720 x 720 Photo 720 OFF ON VSD 6pl

N/A 360 x 360 Normal 360 OFF ON MSD2

High

Speed*1

Micro
weave

Dot size*2

Speed 120 x 120 Economy ON OFF ND-3dot

Plain paper

360 dpi Ink jet
paper

Photo Quality
ink jet paper

Matte Paper-
Heavyweight

Photo paper

Photo Quality
Glossy Film

Ink Jet
transparencies

Default 480 x 240 Normal 240 ON ON MSD1

Quality 360 x 720 Fine 360 ON ON MSD2

N/A 360 x 360 Normal 360 OFF ON MSD2

Default 360 x 720 Fine 360 OFF ON MSD2

Quality 720 x 720 Photo 720 OFF ON VSD 6pl

Default 360 x 720 Fine 360 OFF ON MSD2

Quality 720 x 720 Photo 720 OFF ON VSD 6pl

Default 360 x 720 Fine 360 OFF ON MSD2

Quality 720 x 720 Photo 720 OFF ON VSD 6pl

N/A 720 x 720 Photo 720 OFF ON VSD 6pl

N/A 360 x 360 Normal 360 OFF ON MSD2

NOTE: *1: High speed means Bi-directional printing.

*2: ND means Normal dot. MS means Multi Shot Dot.
VSD means Variable Shot dot.

NOTE: *1: High speed means Bi-directional printing.

*2: ND means Normal dot. MS means Multi Shot Dot.
VSD means Variable Shot dot.

Operating Principles Overview 43

EPSON Stylus COLOR 480 Revision A

2.2 Electrical Circuit Operating Principles

The electric circuit of the Stylus COLOR 480 consists of the following boards.

o Main board: C367MAIN-B Board (C367MAIN Board*1)
o Power supply board: C367 PSB/PSE Board

NOTE: C367MAIN board is used for the product in the first mass production

and it will be changed to C367MAIN-B board at an early date.
The major difference is that C367MAIN-B has one chip CPU which
include the ASCI function. This section describes the operation
principle of C367MAIN-B

This section provides op erating princip les o f C367MAIN-B B oard and C367 PSB /PSE
Board. Refer to Figure 2-16 for the major connection of the each boards and their
roles.

Printer M echanism

CR M otor

C367 M AIN-B Board

PF M otor

H ead D river Board

2.2.1 C367 PSB/PSE board

The power supply boards of Stylus COLOR 4 80 us e a R CC (R ingin g Chalk Conv erter)
circuit, which generates +42VDC for drive line and +5VDC for logic line to drive the
printer. The application of the output voltage is described below.

Table 2-7. Application of the DC Voltages

Voltage Application

• Motors (CR Motor, PF Motor)

+42VDC

+5VDC

This printer dose not have the Power SW. So, the printer is turned on when the AC
cable is connected to the AC inlet. If the AC cable is disconnected from the AC inlet,
this power supply circuit supply 5 voltage for approximately 70us to keep the logic
circuit.

AC voltage input from AC inlet first goes through filter circuit that removes high
frequency components and is then converted to DC voltage via the rectifier circuit and
the smoothing circuit. DC voltage is then lead to the switching circuit and FET Q1
preforms the switching operation. By the switching operation of the primary circuit,
+42VDC is generated and stabilized at the secondary circuit. This +42VDC generated
by the secondary circuit is converted to +5VDC by the chopping regulator IC of the
secondary circuit.

• Printhead com m on voltage

• Printhead nozzle sel ector 42V drive voltage

• C367MAIN control circuit logic

•Sensor

H P /P E /IC S e n s o r

+5VD C

+42V D C

C367 PSB/PSE
Board

Figure 2-16. Electric Circuit

Operating Principles Electrical Circuit Operating Principles 44

EPSON Stylus COLOR 480 Revision A

+42V D C over
c u rre n t p r o te c tio n

D51

AC Input

+42 V D C

IC 5 1

+5V R egulator

F51

R 92,R 93,Q 91,ZD 51

+42V D C Line
C onstant C ontrol

C51

C11

O ver Current
Protection

F1

+5 VD C

Sm oothing
Circuit

TRANS(T1)

Sm oothing
Circuit

ZD53

ZD52,87

+42V D C Line
O ver V oltage
L im ita tio n

Q1

M a in S w itc h in g
Circuit

F ilt e r C ir c iu t

L1

+5VD C Line
O ver V oltage
L im ita tio n

Full W ave
R ectifier circuit

DB1

PC1

Photo
C oupler

Q2,Q3

Abnormal
Feed back circuit

o +42Vline over voltage protection circuit:

The output voltage line is monitored by ZD52,ZD87. If the output level of the
voltage level of +42DC line exceeds +48V, this circuit stops the operation of the
switching FET Q1 via PC1,Q82,Q83 and prevent s high voltage from applie d to the
secondary side

o +42Vline over current protection circuit:

The output voltage is monitored by the F51. When the abnormal current is
detected by F51, F51 is fused and cut off the +42V line output to the Main board

o +5V line constant voltage control circuit/+5V line over current protection circuit:

The output level of the +5VDC line voltage is monitored by the regulator IC51. If
abnormal voltage is detected, the information is fed back to the internal
comparator.

o +5V line over voltage protection circuit:

The output voltage level of the +5V line is monitored by ZD53.
If the output level of the voltage level of +5DC line exceeds +7V, this circuit
stops the operation of the switching FET via PC1,Q82,Q83and prevents high
voltage from applied to the secondary side.

Figure 2-17. C301PSB/PSE Board Block Diagram

The C367 PSB/PSE board has the various control circuits to stop voltage output if a
malfunction occurs on the power supply board or the main board while the printer
mechanism is on duty. Following explains each control and protection circuit.

o +42V line constant voltage control circuit:

The output level of +42V line is monitored by a R92, R93,Q91,ZD51.
When + 42V line reaches about 42.5V, ZD51 has a continuity with and PC1 start
the operation via Q91. Consequently, Q1 switching operation is controlled by this
circuit to stabilize the 42V line.

Operating Principles Electrical Circuit Operating Principles 45

EPSON Stylus COLOR 480 Revision A

2.2.2 C367MAIN-B Board

The printer mechanism is controlled by C367MAIN-B. On this MAIN board, 3.3V
regulator IC is not mounted and all IC is driven with 5.0 V.
See Figure for the C367MAIN-B board block diagram.

P-ROM 4M
(IC 3 )

CR2

Address

Data

E01A 14N A
CPU (IC 1)

D-RAM 1M
(IC 4 )

R e s e t IC
(IC 6 )

EEPRO M
(IC 5 )

M o t o r D r iv e r
(IC 8 )

M o t o r D r iv e r
(IC 9 )

Comm on Driver
( IC 7 )

P a r a lle l I/F IC
(IC 1 0 )

Q 1 & Q 2

CN 1

CN 2

C N 3

CN4

C N 6 P a r a lle l I/F

H P /P E /IC S e n

CR M otor

PF M otor

Head

2.2.2.1 Main elements

Table 2-8 shows the function of the each main elements on C367MAIN-B.

Table 2-8. Main Elements

IC Location Function

CPU
E01A14NA

IC1

PROM IC3

RAM IC4 Bus= 16 bit, 1Mbit DRAM

AT93C46 IC5

LA5623M IC6

E09A17RA IC7

LB1845 IC8 CR motor drive IC
LB1845 IC9 PF motor drive IC

16bit CPU mounted on the MAIN board is driven by
clock frequency 24MHz and controls the printer.

• Capacity 4MB, Bus= 16 bit

• Program for CPU

1kbit EEPROM

• Default value setting

• Parameter backup
Reset IC

• For +5V; reset when +4.2V is detected

• For +42V, reset when +33.2 is detected
Head drive control HIC

• Generates head common voltage.

74LS07 IC10 IEEE1284 paral lel I/F transceiver IC.

Figure 2-18. Block Diagram for the C367MAIN-B Board

Following shows you the major characteristic of this main board.

o Timer IC & Lithium battery are not mounted

Unlike the previous products, the Timer IC and the Lithium battery are not
mounted on the Main board. So, this product perform the Power-on cleaning or
Timer cleaning based on the time command which is sent from the printer driver.
As for the detail, refer to the 2.1.7 Ink Sequence.

o D-RAM

1Mbit D-RAM is mounted on the Main board.

o One CPU controls the all function on the main board.

Operating Principles Electrical Circuit Operating Principles 46

EPSON Stylus COLOR 480 Revision A

Head common driver circuit

2.2.2.2 Printhead Driver Circuit

The printhead drive circuit consists of the following two components:

n Head common driver circuit

(Common driver IC7 & Wave amplifier transistor Q1, Q2)

n Nozzle selector IC on the printhead driver board.

The common driver (IC7) generates a reference drive waveform according to the
output signals from the CPU (IC1). The reference drive waveform is amplified by the
transistors Q1 and Q2 and then transferred to the nozzle selector IC on the printhead
circuit board. Print data is converted to serial data by the CPU and then sent to the
nozzle selector IC on the printhead circuit board. Based on the serial data, the nozzle
selector IC determines the nozzles to be actuated. The selected nozzles are driven by
the drive waveforms generated by the common driver. See Figure 2-19 for the
printhead driver circuit block diagram.

+42V

+5V

13

CN4

VDD

16

VHV

15

COM

14

GND2

3

GND

5

GND

7

GND

9

GND

N o z z le S e le c o r IC
IR 2 C 9 6 F

4

LAT

12

SI1

10

SI2

6

SCK

5

NCHG

2

CH

11

SP

1

THM

H ead D rive
P u ls e

HW A0
HW A1
HW A2
HW A3

IC 1
E01A 14NA

HW CLK1
HW CLK2
HW FLR
HW RST
HW SDATA
HW SCLK
HW SLAT

HW LAT

HNCHG

HS01
HS02
HCLK

HCH
HSP
AN0

F1

28

47

AO

46

27

A1

26

45

A2

25

43

A3

IC 7
Commom
Driver IC

3

40

CLK1

4

39

CLK2

5

38

FLOOR

6

37

RST

29

48

DATA
DCLK

30

49

E

1

41

25
30
28
27
26

24
29
22

VCC45
VC C 45_2

NPNB

PNPB

22
23

20
18

FB

16

o

The reference head drive waveform is genera ted in the common driver ( IC7) based
on the following 11 signal lin es output from the CPU (I C1); A0-A3, CLK1, CLK2,
FLOOR, RST, DATA, DCLK, and E.
Based on the DATA signal output from the CPU (IC1), the original data for the
head drive waveform is written in the memory in the common driver (IC7).
The addresses for the written data are determined by the A0 - A3 signals, and, of
among, data used to determine the waveform angles is selected and appropriate
head driver waveform is generated. Generated head drive waveform is transferred
to nozzle selector IC on the head driver board and applied to the nozzle PZT
specified by nozzle selector IC.

o Head nozzle selector circuit

Printing data are allocated to the two rows, the number of the head nozzle rows,
and converted into serial data by the CPU (IC1). Then the converted data is
transferred to the nozzle selector IC through the two signal lines (SI0 to SI2).
Data transmission from the CPU to the nozzle selector synchronizes with the SCK
clock signal and the LAT signal. Referring to the transferred data, nozzles to be
activated are selected, and the PZTs of the selected nozzles are driven by the drive
waveform output from the head common driver.

Figure 2-19. Printhead Driver Circuit

Operating Principles Electrical Circuit Operating Principles 47

EPSON Stylus COLOR 480 Revision A

2.2.2.3 PF Motor (PF/ PUMP/ ASF Motor) Driver Circuit

The motor driver IC (IC9) on the MAIN board drives PF motor. This product uses 4­phase 48-pole hybrid typ e step pi ng mot or and performs constant current bi -p olar drive.

CPU (IC1) converts PF motor phase control signal to LB1845 micro step drive form
and outputs to motor driver IC (IC9) LB1845 from port 12, 17. Based on this signal,
IC9 determines the phase mode.

The current value on each phase is deter mined by CP U (IC1) and outputs from p ort 13,
14, 15, 16, to driver IC (IC9). Motor dr i ver IC generate s motor dri ver wavef orm bas ed
on these input signals and controls the motor. If the printer dose not receive any data
from PC for 5 minutes, CPU set the motor drive current to 0 via port 13, 14,15,16 and
the motor drive is turned off to save the power consumption.

22

23

21

20

24

19

25

18

26

17

27

16

2

3

13

12

LB 1845
(IC 9 )

I0 1

I1 1

I0 2

I1 2

ENABLE1

ENABLE2

PH1

PH2

VREF1

VREF2

RC1

RC2

SEN1

E1

SEN2

E2

OUT1A

OUT1B

OUT2A

OUT2B

CN3

A

A/

1

3

7

6

Rotor

2

B

9

B/

4

8

E01A14NA
(IC 1 )

PFIA2

PFIA3

PFIB2

PFIB3

PFPHAA

PFPHAB

P F V 2

14

13

15

16

12

17

7

2.2.2.4 CR Motor Driver Circuit

The motor driver IC (IC8) on the MAIN board drives PF motor. This product uses 4­phase 48-pole hybr id type stepping motor and perfo rms con sta nt cu rrent bi-polar drive.

CPU (IC1) converts PF motor phase control signal to LB1845 micro step drive form
and outputs to mot or dr iv er I C (IC8) LB1845 from por t 13 9, 1 44. Based on this signal,
IC8 determines the phase mode.

The current value on each phase is determined by CPU (IC1) and outputs from port
140, 141, 142, 143, to driver IC (IC8). Motor driver IC generates motor driver
waveform based on these input signals and controls the motor. If the printer dose not
receive any data from PC for 5 minutes, CPU set the motor drive current to 0 via port
140, 141,142,143 and the motor drive is turned off to save the power consumption.

22

23

21

20

24

19

25

18

26

17

27

16

2

3

13

12

LB 1845
(IC 8 )

I0 1

I1 1

I0 2

I1 2

ENABLE1

ENABLE2

PH1

PH2

VREF1

VREF2

RC1

RC2

SEN1

E1

SEN2

E2

OUT1A

OUT1B

OUT2A

OUT2B

CN2

A

A/

1

3

7

6

Rotor

2

B

9

B/

4

8

E01A 14N A
(IC 1 )

CRIA2

CRIA3

CRIB2

CRIB3

CRPHAA

CRPHAB

M T V 2

141

140

142

143

139

144

3

Figure 2-20. PF Motor Driver Circuit Block Diagram

Figure 2-21. CR Motor Driver Circuit Block Diagram

Operating Principles Electrical Circuit Operating Principles 48

EPSON Stylus COLOR 480 Revision A

2.2.2.5 Reset Circuit

Reset circuits consist of the rest IC (IC6). Reset circuits are mounted on the MAIN
board to monitor the two voltages: +5V for the logic line and +42V for the drive line.
When each circuit detects abnormality on the corresponding line, it outputs a reset
signal to reset CPU (IC1). This function is necessary to prevent the printer from
operating abnormally. This IC monitors both +5V and +45 lines but can reset them
independently. The res et circuits ou tputs reset signal when +5V line becomes 4.2V or
lower or +42V line becomes 33.2V or lower.

Unlike the previous products, the timer IC is not built in the reset IC and the Lithium
battery also is not equipped on the main board.

.

+42V

IC 6
LA 5623M -TE-L

1

NC1

2

IN

3

NC2

4

GND

MRES

VCC

OUT1

OUT2

+5V

IC 1
E01A 14N A

8

7

6

5

128

129

130

P85

NMI

XRESET

2.2.2.6 EEPROM Control Circuit

Since EEPROM is nonvolatile memory, it keeps written information if the printer
power is turned off. When the printer is turned ON, CPU (IC1) reads data from
EEPROM (IC5) and when the power is turned OFF it stores data to EEPROM.

Information stored in EEPROM is listed below.

n

Various ink counter (I/C consumption counter, waste pad counter, etc.)

n

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

See Table 7-7, “EEPROM Address Map,” on page 130 that provides detailed
information on the values stored in EEPROM.

135

134

133

132

E01A 14N A
(IC 1 )

ECS

ECK

EDI

EDO

+5V

A T 93C 46
(IC 5 )

8

VCC

7

NC

6

ORG

5

GND

CS

SK

DO

DI

1

2

3

4

Figure 2-23. EEPROM Circuit Diagram

Figure 2-22. Reset Circuit Block Diagram

Main signal lines are explained below;

n

OUT1: Interrupt signal

n

OUT2: Reset line

n

IN: +42V line monitoring line

n

VCC: +5V line monitoring line

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

n

CS: Chip selection signal

n

CK: Data synchronism clock pulse

n

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

n

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

Operating Principles Electrical Circuit Operating Principles 49

EPSON Stylus COLOR 480 Revision A

2.2.2.7 Sensor Circuit

C367MAIN-B is equipped with the following two sensors to detect the status of the
printer. Unlike the previous product, ASF HP sensor is not equipped on the ASF and
the ASF HP is determined with the clutch mechanism (2.1.4 Paper Feeding
Mechanism).

o HP/PE/IC Sensor

This sensor uses photo interrupter method and detects the following three status.
The photo interrupt component and two detection levers consists of this sensor.

n

CR home position
The CR home position is detected on the right edge of the CR shaft with the HP/
PE/IC sensor during the power on sequence. In case the CR home position is
detected in the power on sequence, this sensor outputs HIGH signal to the CPU.
When the LOW signal is output to the CPU in the detection position, the CR unit
is out of home position.

n

.Ink cartridge installation condition.
When the printer is powered on, the CR unit moves to the left side with the
specific steps. And in case the plate molded on the Ink cartridge cover push the
sensor detection lever, the sensor detects that the ink cartridge is not installed in
the CR unit and outputs HIGH signal.
When the ink cartridge is installed in the CR unit, the plate molded on the ink
cartridge cover dose not contacts with the sensor detection lever and the LOW
signal is outputs to the CPU. The Ink cartridge installation condition is mon itored
in the ink cartridge replacement sequence also.

The block diagram for the sensor circuit is shown below
:

IC 1
E01A 14N A

+5V

+5V

+5V

SW HPPE

AN0

32

22

Figure 2-24. Sensor Circuit Diagram

1

HPPV

3

GND

2

HPPE

1

GND

T H M

CN1

H P /P E /IC S e n s o r

CN4

Head FFC

n

Paper Top & End position
When the Paper is in the paper path, this sensor outputs the HIGH signal.
When the Paper is not in the paper path, this sensor outputs the LOW signal.
This status is always monitored during the printer is in the power on status with
this sensor.

o Thermistor (THM)

The thermistor is attached directly on the printhead driver board. It monitors the
temperature around the printhead and determines the proper head drive voltage
according to the ink viscosity that varies by the temperature. This information is
fed back to the CPU analog port. When the temperature rises, the head drive
circuit lowers the drive voltage: When the temperature lowers, the head drive
circuit rises the drive voltage.

Operating Principles Electrical Circuit Operating Principles 50

TROUBLESHOOTING

CHAPTER

EPSON Stylus COLOR 480 Revision A

3.1 Overview

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

START

Unit level Troubleshooting

Unit repair

Assemble & Adjustment

END

Table 3-1. Motor, Coil Resistance

Motor Location Check Point Resistance

CR Motor CN2

PF Motor CN3

Pin 1 and 3
Pin 2 and 4

Pin 1 and 3
Pin 2 and 4

10.8 Ohms

°C/ phase)

(at 25
10 Ohms ±10%

(at 25

°C/ phase)

Table 3-2. Sensor Check Point

Sensor Nam e Check Po i nt Signal Level Switch Mode

Off

• Out of HP range

• No paper

• Detect the I/C
On

• Within HP range

• Detect the paper

• Not detects the I/C

HP/PE/IC Sensor CN1/Pin 1 and 2

Thermistor
(THM)

TH1 (on the Head
driver board)

Less than 0.7V

More than 2.4V

Analog signal 10 K (at 24

± 10%

°C)

Figure 3-1. Troubleshooting Flowchart

Troubleshooting Overview 52

EPSON Stylus COLOR 480 Revision A

Table 3-3. Error Indication

Condition Status Monitor 3 Indication

• No Paper

• Paper is not
loaded correctly

Figure 3-2. Paper is not loaded correctly

• Paper Jam

Figure 3-3. Paper Jam

Generic

Remedy

1) Reload the
paper, then
click the
“Continue”
button.

2) If you want
cancel the print
job, click the
“Cancel”
button.

1) Click the
“Eject” button
to eject any
jammed paper.

2) If the paper
is still jammed
inside the
printer, click
the “Stop”
button to
cancel the print
job. Then,
open the
printer cover
and remove the
jammed paper.

Table 3-4. Error indication

Condition Status Monitor 3 Indication

• Ink Out

Figure 3-4. Ink out

• Ink Low

Figure 3-5. Ink low

NOTE: If this error is indicated on the

monitor, you can continue the
printing until the I/C becomes ink
out condition. However, the head
cleaning operation can not be
done so that the remaining ink is
low condition. Refer to Figure 3-6
on the next page.

Generic
Remedy

1) Click the
“How to”
button and
replace the I/C
by following
the procedure.

1) Click the
“How to”
button and
replace the I/C
by following
the procedure.

Troubleshooting Overview 53

EPSON Stylus COLOR 480 Revision A

Table 3-5. Error indication

Condition Status Monitor 3 Indication

• Head cleaning
can not be
completed.

Figure 3-6. Head cleaning caution

• Head alig n ment
(bi-d) was not
performed.

Figure 3-7. Print head alignment was

not performed

NOTE: This error message is indicated

only this adjustment was not
performed in the Set up utility.
Once, this adjustment is
performed, this indication is not
indicated again.

Generic

Remedy

Click “Yes”
button and
replace the
I/C by
following the
procedure.

Use the Print
head alignment
utility on the
printer driver
utility menu to
align the print
head.

Table 3-6. Error indication

Condition Status Monitor 3 Indication

• Communication
Error

Figure 3-8. Communication error

• General Error

Figure 3-9. General error

Generic
Remedy

1) Check the
correct printer
driver is
selected in the
printer setting.

2) Check the
parallel I/F
cable is
connected
correctly.

3) Disconnect
the AC cable
and connect it
again.

Motors or
circuit boards
may be broken.
Find out the
failure parts by
referring to the
“Unit level
troubleshootin
g”.

Troubleshooting Overview 54

EPSON Stylus COLOR 480 Revision A

Table 3-7. Error Indication

Condition Status Monitor 3 Indication

• Waste Ink pad
overflow Error.

Figure 3-10. Waste Ink Error

Generic

Remedy

Replace the
Waste drain
ink pad with
new one and
reset the Waste
drain ink pad
counter
(Protection
counter A) by
using the
Service
Adjustment
program.

Troubleshooting Overview 55

EPSON Stylus COLOR 480 Revision A

3.2 Unit Level Troubleshooting

You can identify the troubles, using the checklist in this section and then find defective
parts. When you find out defective parts, replace them by referring the Chapter 4
“Disassembling.”
In your repair activity, connect the printer to your PC and check the Status monitor 3
by identify the trouble because this printer dose not have control panel. Based on the
Status monitor 3 indication or phenomenon, check the printer more detail by referring
the corresponding check table.

Table 3-8. Symptoms and possible cause

Symptom Possible Cause Check table

• The friction of the LD roller is lowere d due
to the paper dust.

Paper out error indication on
STM3 (Paper is not loaded
correctly)

Paper jam error indication
on STM3

Multiple papers are always
loaded.

Paper is always loaded
without any print job

• The clutch mechanism is broken.

• Tension spring 0.143 come off in the clutch
mechanism.

• Compression sprin g 0.98 comes off.

• Tip of Change lever has any damage.

•PF motor is broken

• Star wheel assembly is not assembled on
the Paper eject frame.

• The Spur gear 15 is not assembled
correctly

• The paper guide front is not assembled
correctly or has any damage.

• The PE detection lever dose not move
smoothly

• The paper return plate dose not work
correctly.

• The Change lever is broken in the Cl utch
mechanism.

Table 3-9
Table 3-10
Table 3-11

Table 3-12
Table 3-13
Table 3-14

Table 3-15

Table 3-16

Table 3-8. Symptoms and possible cause (continued)

Symptom Possible Cause Chec k table

General error indication on
the STM3

Communication error on the
STM3

Any error indication is not
displayed. But, the paper is
not ejected completely.
Paper jam dose not occu r .

Dot missing occur and it is
not recovered with CL

Print quality is not good

• Vertical banding

• Horizontal banding

• Printing is blurred

• Ink stains the paper

• HP/IC sensor lever or PE sensor lever dos e
not move smoothly.

• HP/PE/IC sensor is defective.

• CR motor is defective.

• PF motor is defective

• Main board is def ective.

• Printer Housing dose not secured with
screw on -the printer mechanism

• The main board is defective

• The power supply board is defective.

• The parallel cable dose not su pp ort the bi­directional trans p ortation.

• The suitable print driver is not insta lled into
the PC.

• Paper ejec t r ol l e r ge a r is di s e ng aged from
the pump’s gears.

• The Paper eject frame is not assembled in
the Paper eject frame.

• Pump unit dose not absorb the ink from the
printhead.

• Cap unit dose not stick on the sur face o f the
printhead completely.

• The printhead is broken

• The head FFC has any damage.

• The main board is defective.

• The accuracy of the CR motor is lowered.

• The lack of the lubricant around the CR
unit.

• The both I/C is not held in the CR unit
securely.

• The Paper eject frame is deformed.

• Any foreign material is sticking around the
printhead.

• Paper feed accuracy is lowered.

• Printer driver setting is not suitable.

• Paper path has ink stain somewhere.

Table 3-17
Table 3-18
Table 3-19

Figure 3-20

Figure 3-21

Figure 3-22
Figure 3-23
Figure 3-24

Table 3-25
Table 3-26
Table 3-27

Troubleshooting Unit Level Troubleshooting 56

EPSON Stylus COLOR 480 Revision A

If the problem fits to the detail phenomenon in the table, make sure the check point and
repair the product following the corresponding remedy mentioned in the table when
you find the defective parts in the check point.

Table 3-9. Paper out error indication on STM3

Paper out error indication on STM3

Step

Detail phenomenon Check point Remedy

No.

ASF LD roller attempt
to load the paper.

1

But, paper is not
loaded at all. The LD
roller seems slipping.

• Check the surface of
the LD roller if the
micro pearl or severe
smear is adhered.

LD roller

If it is no problem,
proceed the next step

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

N on-adhesive Area

C L S heet

Adhesive Area

This side down

(U s e a p o s t c a rd
fo r th e b a s e s h e e t.)

Staplers

C loth m oistened
w ith alcohol

Step

Detail phenomenon Check point Remedy

No.

ASF LD roller dose not
attempt to load the
paper. But, the PF
motor and the Spur
gear 35.2 is rotating.

2

Spur gear 35.2

ASF LD roller dose not
attempt to load the
paper. But, the PF

3

motor and the Spur
gear 35.2 is rotating.

Table 3-10. Paper out error indication on STM3

Paper out error indication on STM3

• Check if the clutch
tooth is broken.

Clutch tooth

If it is no problem,
proceed the next step.

1. Check if the tension

spring 0.143 com e s of f
in the Clutch
mechanism.

Tension spring

0.143

• Replace the clutch
mechanism with new
one.

1. Se the tension spring

0.143 in the clutch
mechanism.

• If the problem is not
solved, replace the LD
roller with new one.

2. Set the Compression
spring 0.98 in the
Change lever.

Troubleshooting Unit Level Troubleshooting 57

EPSON Stylus COLOR 480 Revision A

Table 3-11. Paper out error indication on STM3

Paper out error indication on STM3

Step

Detail phenomenon Check point Remedy

No.

When the print data is
sent to the printer, ASF
LD roller continue to
load the paper even if
the first paper is loaded

4

to the PF roller and th e
paper is ejected while
the ASF hopper is
flapping.

When the printer is
turned on, AS F hopper

5

dose not ope r ate at all
in the power on
sequence

1. Check if the tip of the
Change lever has any
damage.

Change lever

comp. spring 0.98

2. Check i f the

Compression spring

0.98 comes off from
the Change lever

If it is no problem,
proceed the ne xt st ep.

1. Check if the PF motor
connector is connected
to the CN3.

2. Check if the PF motor

coil resistance is about
7ohm by using tester
Refer to Table 3-1.

1. Replace the Change

2. Set the Compression

1. Connect th e PF motor

2. Replace the PF motor

3. If the problem is not

lever with new one.

spring 0.98 in the
Change lever.

connector to the CN3 on
the Main board.

with new one.

solved, replace the Main
board with new one.

Table 3-12. Paper jam error indication on STM3

Paper Jam error indication on STM3

Step

Detail phenomenon Check point Remedy

No.

Paper is not ejected
completely and

1

jammed around the
Paper eject frame.

2 Ditto

• Check if the star wheel
assembly is assembled
in the Paper eject
frame.

Star wheel assy

If it is no problem,
proceed the next step

• Check if the Paper
eject roller is rotating
correctly.

Paper eject r oller

Spur gear 15

If it is no problem,
proceed the next step

• Remove the jammed

• Set the tip of the Spur

paper and assemble the
Star wheel assembly in
the Paper eject frame
completely.
If the hook portion of the
Star wheel assembly is
broken, replace the Star
wheel assembly with
new one.

gear 15 to the protrusion
of the Pump unit and
assemble it correctly.

Troubleshooting Unit Level Troubleshooting 58

EPSON Stylus COLOR 480 Revision A

g

Table 3-13. Paper jam error indication on STM3

Table 3-14. Paper jam error indication on STM3

Paper Jam error indication on STM3

Step

Detail phenomenon Check point Remedy

No.

The paper is jammed

3

around the Front paper
guide.

Paper is loaded
correctly from ASF.

But, after complete the
print job, paper jam
indicated on the screen
without any paper jam.

4

If you send the ne w
print job in this
condition, the General
error is indicated on
the screen.,

1. Check if the Front
paper guide is floating
from the assemble
position.

2. Check if there is any

damage around the
rear edge of the each
rib on the Front paper
guide.

Front paper guide

If it is no problem,
proceed the ne xt st ep

• Check if the Torsion

spring 0.22 comes off
on the both PE sensor
lever.

Tension sprin

0.22

PE sensor lever

1. Assemble the Front

2. Replace the Front paper

• If the Torsion spring

• If it is no problem,

paper guide front to the
suitable portion and
confirm the PF grou nding
spring is securing the
Front paper guide.

PF grounding spring

Front Paper guide

guide with new one.

0.22 is not set on the
correct position, set it
correctly. If any paper
dust is placed around the
PE sensor lever, remove
it

proceed the next step

Paper Jam error indication on STM3

Step

Detail phenomenon Check point Remedy

No.

When the paper is
loaded from the ASF
and ejected without
any printing. After
eject the paper,
paper eject sequence

5

is continued.
If any print job is

sent to the printer,
General error is

1. Check if the CN1
connector cable for HP/
PE/IC sensor cable is
disconnected on the
Main board or senso r.

2. Check if the HP/PE/IC

sensor operates
correctly by using the
tester. Refer to Table
3-2.

1. Connect the CN1

2. Replace the HP/PE/IC

3. If the problem is not

displayed on the
STM.

connector cable to the
CN1 on the Main board.

sensor with new one.

solved, replace the Main
board with new one.

Troubleshooting Unit Level Troubleshooting 59

EPSON Stylus COLOR 480 Revision A

Table 3-15. Multiple papers are always loaded

Multiple papers are always loaded.

Step

Detail phenomenon Check point Remedy

No.

Any error indication is
not displayed on the

1

monitor. But, multiple
papers are always
loaded from ASF.

Check if the Paper return
plate is operating
correctly in the AS F
when the paper is loaded.

• Assemble the torsion
spring 28.9 in the ASF
frame.

Torsion spring 28 .9

.

Table 3-16. Paper is always loaded without any print job

Paper is always loaded without any print job

Step

Detail phenomenon Check point Remedy

No.

Paper is always loaded
from ASF without any
print job.

ASF hopper
continue to flapping
when the printer is
turned on.

1

1. Check if the tip of the
Change lever has any
damage.

Change lever

comp. spring 0.98

2. Check if the

Compression spring

0.98 comes off from
the Change lever

1. .Replace the Change
lever with new one.

2. Set the Compression

spring 0.98 in the
Change lever.

Troubleshooting Unit Level Troubleshooting 60

EPSON Stylus COLOR 480 Revision A

g

Table 3-17. General Error indication on the STM3

General Error indication on the STM3

Step

Detail phenomenon Check point Remedy

No.

When the printer is
turned on, the printer

1

continue the paper
eject sequence even if
the paper is not in the
paper path.

1. Check if the Torsion
spring 0.22 comes off
on the both HP/IC
sensor lever.

HP/IC sensor lever

Torsion spring

0.22

2. Check if the Torsion

spring 0.22 comes off
on the both PE sensor
lever.

Tension sprin

0.22

1. Set the Torsion spring

2. Set the Torsion spring

0.22 on the HP/IC sensor
lever.

0.22 on the PE sensor
lever.

Table 3-18. General Error indication on the STM3

General Error indication on the STM3

Step

Detail phenomenon Check point Remedy

No.

When the printer is
turned on, the CR unit

2

dose not move at all in
the power on sequence.

When the printer is
turned on, PF roller

3

dose not rotate at all in
the power on sequence.

1. Check if the CR
motor connector is
connected CN2 on the
Main board.

2. Check if the coil

resistance of the CR
motor is about 7. 8ohm
by using the tester.
Refer to Table 3-1.

1. Check if the PF motor
connector is connecte d
to the CN3.

2. Check if the PF motor

coil resistance is about
7ohm by using tester

1. Connect the CR moto r

2. Replace the CR motor

3. If the problem is not

1. Connect the PF mo to r

2. Replace the PF motor

3. If the problem is not

connector to the CN2 on
the Main boa rd.

with new one.

solved, replace the Main
board with new one.

connector to the CN3 on
the Main boa rd.

with new one.

solved, replace the Main
board with new one.

PE sensor lever

3. Check if the CN1
connector cable is
connected on the CN1
on the Main board or
sensor.

4. Check if the HP/PE
sensor work correctly
by using the tester.
Refer to Table 3-2

3. Connect the CN1
connector cable to the
CN1 on the Main board.

4. Replace the HP/PE/IC
sensor with ne w one .

5. If the problem is not
solved, replace the Main
board with new one.

Troubleshooting Unit Level Troubleshooting 61

EPSON Stylus COLOR 480 Revision A

Table 3-19. General Error indication on the STM3

General Error indication on the STM3

Step

Detail phenomenon Check point Remedy

No.

When the printer is
turned on, it sounds
strange noise and the

4

CR unit is stopped
around the CR lock
lever.

1. Check if the Top
housing is secured with
the fixing screw at the
front side.

Top housing

2. Check if the Change

lever is placed to the
printer front side.

Change lever

3. Check if the PF motor

is operated. Check the
CN3 connector and the
coil resistance for PF
motor.

4. If the CR lock lever is

not released even if the
PF motor rotate in the
power on sequence,
check if one of th e
gears has any damage
in the PF motor torque
transportation path.
Refer to Figure 2-14.

1. Secure the Housing

2. Turn back the Chan ge

3. Connect th e PF motor

4. Change the damaged

5. If the problem is not

fixing screw at the printer
front side.

lever to the printer back
side with the tweezer or
small screw driver.

cable to CN3 on the
Main board.
Replace the PF motor
with new one.

gear with new one.

solved, replace the Main
board with new one.

Table 3-20. Communication error on the STM3

Communication Error on the STM3

Step

Detail phenomenon Check point Remedy

No.

When the printer is

1

turned on, printer dose
not operate at all.

When the printer is
turned on, power on
sequence is operated
correctly. But, when

2

any print job is sent to
printer,
communication error is
indicated on the
monitor.

1. Check if neither CR
motor nor PF motor
work at all wh en the
printer is turned on.

1. Check if the Parallel
I/F cable supports the
bi-directional
transportation.

2. Chec k if the PC

support bi-directional
communication.

3. Chec k if SC480

printer dr iver is used
for the print job.

4. Check if th e i ncorrect

model name is stored
in the 02<H> address
of the EEPROM in the
Main board.

5. Check if scan monitor

is installed in the PC
and it is active.

1. Replace the PS board

2. If the problem is not

1. Replace the Parallel I/C

2. Change the setting of

3. Install the SC480 printer

4. Write down 01<H> data

5. Close the scan mon itor

6. If the problem is not

with new one.

solved, replace the main
board with new one.

cable with the suitable
one.

Bi-d communication in
the BIOS of the PC.

driver in the PC.

into the 02<H> address
of the EEPOM by using
the Dump.exe prog ram.

in the Windows task ba r
or overwrite the latest
ESCPCSCAN.DLL.

solved, replace the main
board with new one.

Troubleshooting Unit Level Troubleshooting 62

EPSON Stylus COLOR 480 Revision A

Table 3-21. Paper is not ejected completely without any error indication

Table 3-22. Dot missing occur and it is not recovered with CL

Paper is not ejected completely without any error indication

Step

Detail phenomenon Check point Remedy

No.

1. Check if the Paper

1. Assemble the Spur gear
eject roller rotate when
the paper is ejected.

Printing is normal.
But, the paper is not
ejected completely a nd

1

the bottom area stay
around the Paper eject
frame.

2. Check if the Paper
eject frame is secured
with the three fixing
screws to the Main

2. Secure the Paper eject

frame.

Paper eject frame

15 to the protrusion on the
pump unit.

Spur gear 15

frame witt the two fixing
screws to the Main
frame.

Dot missing occur and it is not recovered with CL

Step

Detail phenomenon Check point Remedy

No.

1. Check if ink is ejected
to the waste ink pad via
pump unit in the CL

1. If ink is not ejected at all

.

sequence.

2. Check if there is any

2. Remove the foreign
foreign material
around the seal rubber
parts on the cap
assembly.

In the CL sequence,
the pump unit seems
work correctly. But,
ink is not ejected to the
waste ink pad at all.

1

Moreover, any ink is
not absorbed from the
head to the cap.

Cap seal rubber

parts

3. Check if any damage
is observed arou nd the
seal rubber parts on

3. Replac e th e Cap

the cap assembly.

to the waste ink pad in the
CL sequence, proceed the
following check point 2).

material around the seal
rubber parts.

assembly with new one.

4. Check if the two
compression spring
are assembled in the

4. Set the Compression
spring into the Cap
assembly.

Cap assembly
correctly.

Compression

spring

Troubleshooting Unit Level Troubleshooting 63

EPSON Stylus COLOR 480 Revision A

Table 3-23. Dot missing occur and it is not recovered with CL

Table 3-24. Dot missing occur and it is not recovered with CL

Step

No.

1

Dot missing and it is not recovered with CL

Detail phenomenon Check point Remedy

5) Check if the Pump
tube is connected to
the bottom of the Cap

5) Connect the Pump tube
to the bottom of the Cap
assembly deeply.

assembly correctly

Pump tube

Cap assy.

connection point

6) Pump unit may coil the
pump tube insid e th e u nit.
In this case, pull out the
coiled tube from the
pump unit carefully.
After that, connect the
pump tube to the Cap
assembly after placing
the tube correctly.

Tube

In the CL sequence,
the pump unit seems
work correctly. But,
any ink is not ejected
to waste ink pad.

Moreover, any ink is
not absorbed from the
head to the cap.

6) Check if the pump tube
has a little slack
between the Cap
assembly and the pump
unit when the Cap
assembly is slide up
completely.

Dot missing occur and it is not recovered with CL

Step

Detail phenomenon Check point Remedy

No.

In the CL sequence,
ink is ejected to the
Waste ink pad (this
means pump unit &
cap unit are working

2

correctly). But, the dot
missing is not solved at
the specific nozzles
even if the several CLs

1. Check if the segment
in the nozzle check
patter is reduced every
CL & Nozzle check
pattern printing.

2. Check if any damage

is observed on the
Head FFC.

1. Replace the I/C with

2. Replace the Head FFC

3. Replace th e printhead

are performed.
In the CL sequence,

ink is ejected to the
Waste ink pad. But, dot
missing is occurred on

3

all nozzle in the

1. Check if the Head
FFC is connected to the
CN4 on the Main board
or Head FFC.

1. Connect the Head FFC

2. Replace the Printhead
printing and is not
solved in the several

3. Replace the Main board
CLs.

new one in the I/C
replacement sequence.

with the new one.

with new one.

securely to the CN4 on
the Main board or
Printhead.

with new one.

with new one.

Pump unit

7) If the problem is not
solved, replace the Pump
unit with new one.

Troubleshooting Unit Level Troubleshooting 64

EPSON Stylus COLOR 480 Revision A

.

Table 3-25. Print quality is not good

Table 3-26. Print quality is not good

Print quality is not good

Step

Detail phenomenon Check point Remedy

No.

1. Check if each

1. Perform the CL and
segment is printed
correctly in the nozzle
check pattern.

2. Clean the surface of the

2. Check if the surface of
the CR guide shaft
dose not have any
sever stain.

Vertical banding is
appeared against the
CR movement
direction. And it looks
like uneven printing.

3. Check if the surface of
the CR sliding portion
on the Paper eject
frame has enough oil.

3. Clean the surface of t he

1

CR movement

direction

G26 lubrication

4. Check if the CR guide

4. Reassemble the CR

shaft is assembled in
the correct portion
securely.

5. Check if the surface of

5. Replace the CR guide

the CR guide shaft is
flat.

6. Check if the surface

6. Replace the Paper ej ect

of the Paper eject
frame is flat.

check the nozzle check
pattern.

CR guide shaft with the
dry soft cloth and
lubricate G-55 inside the
CR guide shaft. Refer to
Figure 6-4.

CR sliding portion on the
Paper eject frame and
lubricate specific amou nt
of the G-26.
Refer to Figure 6-8.

guide shaft into the
mounting slat on the
both side frame and
secure it with Rod
spring. Figure 4-49 and
Figure 4-50.

shaft with new one.

frame with new one.

Print quality is not good

Step

Detail phenomenon Check point Remedy

No.

7) Check if the rubber

7. Stick the rubber parts

parts are stuck inside the
I/C cover.

1 Ditto

8) Replace the following
parts.

•CR motor

• CR timing belt

• Compression spring 15.7

1. Check if each segment

1. Perform the CL and
is printed correctly in
the nozzle check
pattern.

2. Check if the suitable

2. Use the suitable paper

paper is used

Micro banding appears
horizontally against the
paper feeding direction
and it appears with the
same width.

according to the
printer driver setting.

3. Chec k if the Paper
feed roller is dirty.

4. Check if the following
parts do not have any

3. Clean the surfa ce of t he

4. Replace the damaged

damage.

2

CR movement

direction

• Combination gear 8.4,

21.6

• Combination gear

9.6,33.6

• Spur gear 35.4.

• Spur gear 15

5. Replace the Printhead

inside the I/C cover.

check the nozzle check
pattern. by using the
Adjustment program.

according to the printer
driver setting.

PR roller carefully with
the soft bru sh

parts with new one.

with new one.

Troubleshooting Unit Level Troubleshooting 65

EPSON Stylus COLOR 480 Revision A

d

Table 3-27. Print quality is not good

Print quality is not good

Step

Detail phenomenon Check point Remedy

No.

1. Check if the suitable
paper is used according
to the printer driver

3

Printing is blurred.

setting.

2. Check i f the correct

head ID is stored in the
EEPROM by using the
Adjustment progra m.

1. Use the suitable paper
according to the driver
setting.

2. Input 6 digits code of

the head ID into the
EEPROM by using the
Adjustment program.

4 Ink stains the paper

1. Check if the following
parts are stained with
ink.

• Upper paper driven

roller

• PF roller

• Paper guide front

• Paper eject roller.

2. Check if there is some

ink drops around the
backside of the
printhead.

3. If the bottom area of

the printed paper has
ink stain, check if the
Paper eject frame is
secured with three
screws.

4. If the bottom area of

the printed paper has
ink stain, check if the
Paper eject frame is
bent upward.

1. Clean the ink stained
parts with soft cloth

2. Wipe off the ink drop

with the soft cloth
carefully.

3. Secure the screws fixing

the Paper eject frame.

4. Replace the Paper eject

frame with new one.

Troubleshooting Unit Level Troubleshooting 66

DISASSEMBLY AND ASSEMBLY

CHAPTER

EPSON Stylus COLOR 480 Revision A

4.1 Overview

This section describes procedures for disassembling the main components of the Stylus
COLOR 480. Unless otherwise specified, disassembly units or components can be
reassembled by reversing the disassembly procedure. Things, if not strictly observed, that
could result in injury or loss of life are described under the heading “Warning”. Precautions
for any disassembly or assembly procedures are described under the heading “CAUTION”.
Chips for disassembling procedures are described under the heading “CHECK POINT”.
If the assembling procedure is different from the reversed procedure of the disassembling,
the procedure is described under the heading “REASSEMBLY”.
Any adjustments required after disassembling the units are described under the heading
“ADJUSTMENT REQUIRED”. When you have to remove any units or parts that are not
described in this chapter, refer to the exploded diagrams in the appendix.

Read precautions described in the next section before starting.

4.1.1 Precautions

See the precautions given under the handling “WARNING” and “CAUTION” in the
following column when disasse mblin g or assem blin g EPS ON Stylus C OLO R 480 .

W ARNING

n Disconnect the power cable before disassembling or assembling

the printer.

n 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.

n If ink comes into contact with your skin, wash it off with soap and

water. If irritation occurs, contact a physician.

n A lithium battery is installed on the main board of this printer. Be

sure to observe the following instructions when serving the
battery:

1. 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.

2. Do not heat the battery or put it near fire.

3. 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.)

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

5. Do not dismantle the battery. (The g as inside the battery m ay hurt your
throat. Leakage, burning or explosion may also be resulted.)

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

n Danger of explosion if the battery is incorrectly replaced. Replace

only with the same or equivalent type recommended by the
manufacture. Dispose the used batteries according to
government’s law and regul ation s .

Disassembly and Assembly Overview 68

EPSON Stylus COLOR 480 Revision A

4.1.2 Tools

CAUTION

CAUTION

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

n Never remove the ink cartridge from the carriage unless this

manual specifies to do so.

n When transporting the printer after installing the ink cartridge,

be sure to pack the printer for transportation without removing
the ink cartridge.

n Use only recommended tools for disassembling, assembling or

adjusting the printer.

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

details.)

n Make the specified adjustments when you disassemble the printer.

(See Chapter 5 for details.)

n 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;

1. Once the ink cartridge mounted on the prin ter is remo ved, air co mes in
and creates bubbles in the cartridge. These bubbles clog ink path and
cause printing malfunction.

2. 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.

n Because of the reasons above, make sure to return the printer to

the user with a new ink cartridge installed.

Use only specified tools to avoid damaging the printer.

Name Supplier Parts No.

Phillips Screw Driver (No.1) EPSON B743800100
Phillips Screw Driver (No.2) EPSON B743800200
Nipper EPSON B740500100
Tweezers EPSON B741000100

Disassembly and Assembly Overview 69

EPSON Stylus COLOR 480 Revision A

4.1.3 Work Completion Check

If any service is made to the printer, use the checklist shown below to co nfirm all works are
completed properly and the printer is ready to be returned to the user.

Table 4-1. Work Completion Check

Classifi-

cation

Main Unit

Adjustment

Item Check Point Status

Self-test Is the operation normal?

On-line Test Is the printing successful?

Printhead

Carriage
Mechanism

Paper Feeding
Mechanism

Specified
Adjustment

Is ink discharged normally from
all the nozzles?

Does it move smoothly?

Is there any abnormal noise
during its operation?

Is there any dirt or foreign
objects on the CR Guide Shaft?

Is the CR Motor at the correct
temperature?
(Not too heated?)

Is paper advanced smoothly?

• No paper jamming?

• No paper skew?

• No multiple feeding?

• No abnormal noise?

Is the PF Motor at correct
temperature?

Is the paper path free of any
obstructions?

Are all the adjustment done
correctly?

o Checked
o Not necessary

o Checked
o Not necessary

o Checked
o Not necessary

o Checked
o Not necessary

o Checked
o Not necessary

o Checked
o Not necessary

o Checked
o Not necessary

o Checked
o Not necessary

o Checked
o Not necessary

o Checked
o Not necessary

o Checked
o Not necessary

Table 4-1. Work Completion Check (continued)

Classifi-

cation

Lubrication

Function ROM Version Version:

Packing

Others

Item Check Point Status

Are all the lubrication made at

Specified
Lubrication

Ink Cartridge

Protective
Materials

Attachments,
Accessories

the specified points?
Is the amount of lubrication

correct?

Are the ink cartridges installed
correctly?

Have all relevant protective
materials been attached to the
printer?

Have all the relevant items been
included in the package?

o Checked
o Not necessary

o Checked
o Not necessary

o Checked
o Not necessary

o Checked
o Not necessary

o Checked
o Not necessary

o Checked
o Not necessary

Disassembly and Assembly Overview 70

EPSON Stylus COLOR 480 Revision A

U p p e r H o u s i n g
r e m o v a l

P r i n t h e a d r e m o v a l

C R M o t o r
r e m o v a l

C i r c u i t b o a r d
r e m o v a l

W a s t e D r a i n I n k
P a d u n i t r e m o v a l

M a i n B o a r d u n i t
r e m o v a l

P S B o a r d u n i t
r e m o v a l

P F M o t o r r e m o v a l

I n k S y s t e m u n i t
r e m o v a l

C a p u n i t r e m o v a l

P u m p u n i t r e m o v a l

L D R o l l e r r e m o v a l

H P / P E / I C S e n s o r
r e m o v a l

R e m o v i n g t h e
L D R o l l e r u n i t

R e m o v i n g t h e
P a p e r E j e c t R o l l e r

R e m o v i n g t h e
P F R o l l e r u n i t

C R u n i t r e m o v a l

A S F f r a m e u n i t
d i s a s s e m b l i n g

4.2 Disassembly

The flowchart below shows step-by-step disassembly procedures. When disassembling
each unit, refer to the page number shown in the figure.

Page 72

Page 73

Page 86

Page 86

Page 75

Page 86

Page 76

Page 76

Figure 4-1. Disassembling Flowchart

Page 79

Page 76Page 80

Page 81

Page 81

Page 88

Page 90

Page 92

Page 95

Page 84

Disassembly and Asse mbly Disassembly 71

EPSON Stylus COLOR 480 Revision A

4.2.1 Housing removal

1. Open the printer cover and remove 2 screws (C.B.P-TITE R 3x6 R/Uc screw) at the
printer front side.

C.B.T-TITE R 3X6 R/Uc

Figure 4-2. Removing 2screws for Housing

2. Remove 2 screws (C.BS. 3x6 F/Zn screw) at the back of the printer and remove the
Housing.

n Tightening Torque for screw

• C.B.P-TITE R3x6 R/Uc screw for housing front side: 6 +/- 1kgf.cm

• C.B.S 3x6 F/Zn screw for housing back side : 6+/- 1kgf.cm

C.B.S 3X6 F/Zn screws

Figure 4-3. Removing 2scews for Housing

Disassembly and Asse mbly Disassembly 72

EPSON Stylus COLOR 480 Revision A

4.2.2 Printhead removal

1. Remove the Housing from the printer. (Section 4.2.1 Housing removal)

2. Open the Cover cartridge and remove the both black and color ink cartridges.

3. Release the Printhead FFC from the cable holder in the left side of the CR unit.

4. Remove one screw (C.B.P.-TITE 3 x 6 F/Zn) tightening th e Printhead at the left side of
the CR unit.

C.B.P-TIT E 3X 6 F/Zn

Head FFC

Figure 4-4. Removing the Printhead’s FFC

5. Remove the Printhead from the CR unit taking the following step.

6. Disconnect the Printhead’s FFC from the connector on the Printhead.]

CHECK

POINT

n Place the Printhead’s FFC in the cable holder by the four

portions indicated in the following Figure4-6.

n Make sure that the Head Grounding Plate is installed to the

carriage correctly. Refer to Figure 4-7.

n Make sure that two holes of the Printhead correctly fit in the

installing position pins. Figure 4-7.

Step2

Step1

Figure 4-6. Placing the Printhead’s FFC

Figure 4-5. Removing the one screw tightening the Printhead

Disassembly and Asse mbly Disassembly 73

EPSON Stylus COLOR 480 Revision A

Head installing position pins

Head grounding plate

Figure 4-7.

Printhead installing the position pin & the grounding plate.

n Tightening Torque for screw

• C.B.P-TITE 3x8 screw for printhead: 6+/1kgf.cm

ADJUSTMENT

REQUIRED

When the Printhead is replaced with a new one, following
adjustments must be performed in the order below:

1. Initial ink charge

2. Printhead ID input

3. Bi-d adjustment
When the Printhead is removed and reinstalled, only the following

adjustment is required.

1. Head cleaning

2. Bi-d adjustment

Disassembly and Asse mbly Disassembly 74

EPSON Stylus COLOR 480 Revision A

4.2.3 CR motor removal

1. Remove the Housing from the printer. (Section 4.2.1 Housing removal)

2. Move the CR unit from the CR home position to around the center position.

3. Push the CR motor from the right to left to slack the CR timing belt.

4. Take off the CR timing belt from the Pinion gear of the CR motor.

CR Timing belt

Step 1

Step 2

Figure 4-8. Taking off the CR timing belt.

5. Remove the Compression spring 15.7 and Holder reinforcement plate between the CR
motor holder and the protrusion on the Main frame with the tweezers.

Compression spring 15.7

7. Remove the CR motor from the Printer mechanism taking the following step:

- Slide the CR motor to right side. (Step2)

- Slide the CR motor to backward to take off the fixing part placing the right side of
the CR motor. (Step3)

- Slide the CR motor to the left side to take off the fixing part placing the left side of
the fixing part. (Step 4).

3

4

2

1

Figure 4-10. Removing the CR motor

8. Take the CR motor’s cable out from the cable hook in the Waste drain ink pad unit.

9. Disconnect the CR motor connector cable from the CN2 on the Main board with
tweezers.

ADJUSTMENT

REQUIRED

n The Gap adjustment (Bi-d adjustment) is required when the CR

motor is removed or replaced.

n Connect the CR motor connector cable to the CN2 on the Main

Holder Reinforcement Plate

board. Use of tweezers or pincers is recommended to facilitate
the job, since the CN2 is not located near the rear edge of the
Main board.

n Make sure to set the Holder reinforcement plate with the

Compression spring 15.7. Refer to Figure4-9.

Figure 4-9. Remove the Compression spring 15.7Compression spring 15.7

6. Slide the CR motor holder along with the CR motor to the left side

Disassembly and Asse mbly Disassembly 75

EPSON Stylus COLOR 480 Revision A

4.2.4 Circuit board removal

1. Remove the Housing from the printer. (Section 4.2.1 Housing removal)

2. Remove four screws (C.B.S. 3x6, F/Zn) sec uring the Circuit board unit at the front
side of the Printer mechanism.

C.B.S. 3x6 F/Zn

Figure 4-11. Removing four screws at the printer front side

3. Remove four screws (C.B.S.3x6, F/Zn) securing the Circuit board unit at the back side
of the Printer mechanism and remove two screws (C.B.S. 3x6, F/Zn) securing the
Circuit board unit at the right side (viewed from back side).

4. Holding the Left hous ing ligh tly, p ull down the Circ uit board unit. T hen dis connect th e
following four cables from the corresponding connectors on the Main board.

n

CR motor connector cable : CN2

n

PF motor connector cable : CN3

n

Printhead FFC : CN4

n

HP/PE/IC sensor cable : CN1

5. Remove the following screws securing each circuit board to the Shield plate. Figure
Figure 4-13.

n

C364 MAIN/B : Remove five screws.
C.B.S. 3x6, F/Zn (Red circled screws) : 3pcs (for Main board)
C.P. 3x6, F/Zn (Yellow circled screws) : 2pcs (for Parallel I/F) connector)

n

C364PSB/E : Remove five screws.
C.B.S, 3x6, F/Zn (Yellow circled screws) : 3pcs (for PS board)
C.B.S-TITE R, 3x6, F/UC (Red circled screw) : 1pcs (for PS board)
C.B.(O),4x5, F/ZG for 120V (Green circled screw):1pcs (for Earth terminal)
Hexagon nut, Normal M4(Green circled) :1pcs (for Earth terminal)
(C.B.S Screw 3x6, F/Zn for 220V (Green circled screw): 1pcs (for Earth
terminal))

NOTE: 110V type of the PS board dose not have earth wire.

C.B.S. 3X6 F/zn

Refer to the Figure 4-13

C364 MAIN Board

C364 PSE/PSE board

Figure 4-12. Removing six screws at the printer back side & right side

Figure 4-13. Remove the screw securing each circuit board.

Disassembly and Asse mbly Disassembly 76

EPSON Stylus COLOR 480 Revision A

ADJUSTMENT

REQUIRED

When replacing the Main board with a new one, perform the
following service items.

n Before removing the Main board, connect the parallel I/F

Cable and try to read out the following data by using the
Adjustment program. If this operation succeeds, replace the
Main board and write the read out data to the new Main board
through the Adjustment program . Refer to xxxxx.

1) I/C Ink consumption counter.

2) Waste ink drain pad counter.

3) Printhead ID input.

4) Gap adjustment (Bi-d adjustment)
In case the above mentioned data are not able to be read out from

the defective Main board, perform the following service items.

n Replace the both ink cartridges with a brand new one.
n Replace the Waste ink drain pad with a new one.
n Input the Printhead ID.
n Adjust the Bi-d alignment.

n Since the cable between C364 MAIN board and C364 PSB/E

board are directly soldered, take the following steps when
replacing only one circuit board in the service activity.

1. Take off the cable on the Main board by removing the solder by
heating it with the soldering iron.

2. Replace the defective circuit board with new one.

3. Insert the tip of the cable into the soldering hole of the ASP Main
board and solder it securely.

n Tightening Torque for screw

• C.B.S. 3x6 F/Zn screw for PS board : 6+/- 1kgf.cm

• C.B.S TITE R 3x6,F/Uc screw for PS board : 6+/- 1kgf.cm

• C.B.S. 3x6 F/Zn screw for Main board : 6+/- 1kgf.cm

• C.P. 3x6,F.Zn screw for Parallel I/F connector : 6+/- 1kgf.cm

• C.B.S. 3x6 F/Zn screw for Circuit unit : 6+/- 1kgf.cm

• C.B.(O) 4x5, F/ZG screw for Earth cable : 11+/-1kgf.cm

CHECK

POINT

When replacing or removing the PS board, be sure to use the
following suitable screw to secure the PS board.

C.B.S-TITE R, 3x6, F/UC

Figure 4-14. PS board fixing screws.

Install a new cartridge before sending back the printer to the

n

user, since the ink cartridge once taken out can not be used
again.

n Installation of I/C must be carried out by I/C replacement

sequence. Otherwise, ink may not eject properly.

Refer to the xxxxx

Disassembly and Asse mbly Disassembly 77

EPSON Stylus COLOR 480 Revision A

CHECK

POINT

n Check the Earth terminal and wire position. Refer to the

following figure. The earth wire for 120V must be placed back
side of the Heat sinker HT1. And the earth wire for 220V must be
placed in front of the Heat sinker HT1 as following figure.

Earth terminal

120v Type

Heat sinker

Earth terminal

220V Type

Heat sinker

Figure 4-15. Earth terminal and wire position

Disassembly and Asse mbly Disassembly 78

EPSON Stylus COLOR 480 Revision A

4.2.5 Waste drain ink pad unit removal

1. Remove the Housing from the printer. (Section 4.2.1 Housing removal)

2. Remove one screw (C.B.P TITE 3x8 F/Zn screw) on the front right side of the printer.
(viewed from front side)

C.B.T TITE 3x8 F/Zn screw

Figure 4-16. Removing one screw securing the Waste ink pad unit

3. Remove one screw (C.B.P. TITE 3x8 F/Zn screw) and take three cables off from the
cable hook in the Waste drain ink pad unit as shown in the following figure.

.

CHECK

POINT

n After assembling the Waste drain ink pad unit, be sure to set the

following three cables in the cable hook in the Waste drain ink
pad unit. Refer to the Figure 4-17.

n When assembling the Waste drain ink pad unit, be sure to set the

tip of the waste ink tube in the suitable position of the Waste
drain ink pad. Refer to the Figure 4-18

Waste drain ink pad

Pump unit

Ink tube

Figure 4-18. Drain ink tube setting position

Peel off the adhesive tape

C.B.S. TITE 3X8 F/Zn scre w

ADJUSTMENT

REQUIRED

When the Waste drain ink pad is replaced with a new one,
following service item is required.

n Waste drain ink counter reset operation. Refer to (xxxxx)

n Tightening torque for screw

• C.B.P. TITE 3x8 screw for Waste drain ink pad unit : 9+/1 kgf.cm

Cable holder

Figure 4-17. Removing one screws & cables at the back side of the printer

4. Remove the Waste drain ink pad unit from the printer

Disassembly and Asse mbly Disassembly 79

EPSON Stylus COLOR 480 Revision A

4.2.6 PF motor removal

1. Remove the Housing from the printer. (Section 4.2.1 Housing removal)

2. Remove the Waste drain ink pad unit from the printer. (Section 4.2.5 Waste drain ink
pad unit removal)

3. Remove two screws (C.B.S. 3x6,F/Zn screw) securing the PF motor to the Ink system
frame.

C.B.S 3x6 F/Zn screws

CR motor

n Since the CN 3 is not located near the rear edge of the Main

board, it is easier to use the tweezers or pincers to connect the
cable to the CN3.

n Tightening torque for screw

• C.B.S. 3x6 F/Zn screw for PF motor : 9+/1 kgf.cm

Figure 4-19. Removing two screws securing the PF motor

4. Disconnect the connector cable for PF motor from CN3 on the Main board and take the
cable off from the hook on the Waste drain ink pad.

5. Remove the PF motor from the right frame.

CHECK

POINT

Be sure that the PF motor cable is placed to the backward. Refer to
the Figure 4-19.

Disassembly and Asse mbly Disassembly 80

EPSON Stylus COLOR 480 Revision A

4.2.7 LD Roller removal

1. Remove the Housing from the printer. (Section 4.2.1 Housing removal)

2. Take the Head FFC off from the Head FFC holder located along the LD roller shaft
holder.

Head FFC holder

LD roller shaft hol d er

Figure 4-20. Taking Head FFC out from the FFC holder

3. Remove two screws (C.B.S. 3x6, F/Zn screw) securing the LD roller holder to the
Main frame.

4. Push the two hooks of the LD roller shaft holder as shown in the following figure.

5. Pull the LD roller shaft holder unit upward from the Main frame.

Two hooks for LD roller holder

Figure 4-22. Pushing two hooks of the LD roller shaft holder

6. Remove the LD roller along with the Clutch mechanism from the LD roller shaft
holder unit.

LD Roller shaft holder unit

C.B.S 3X6 F/Zn screws

Clutch mechanism

LD Roller

Figure 4-23. Removing the LD roller with Clutch mechanism.

Figure 4-21. Removing two screws securing the LD roller holder

Disassembly and Asse mbly Disassembly 81

EPSON Stylus COLOR 480 Revision A

CAUTION

n Do not damage the tooth of the Spur gear 35.2 and the

Combination gear 11.2, 35.2 when assembling the LD roller shaft
holder unit.

Spur gear 35.2

Combination gear 11.2, 35.2

Figure 4-24.

Combination Gear 11.2, 35.2 and Spur Gear 35.2

n Before assembling the LD roller shaft, make sure that the round

hole of the Clutch is set on the protrusion on the LD roller shaft
as shown in the following figure.

round hole on the Clutch

Protrusion on the LD roller shaft

Figure 4-25. Assembling the Clutch

Assemble the LD roller shaft holder unit to the printer

n

mechanism in the following procedure.

1) Set the tip of the Change lever to the printer front side.

Change lever

Figure 4-26. LD Roller shaft holder assembling

procedure (1)

Disassembly and Asse mbly Disassembly 82

EPSON Stylus COLOR 480 Revision A

2) Assemble the LD roller sh aft holder unit while storing the
Paper return plate into the ASF frame.

Paper return plate

Figure 4-27. LD Roller shaft holder assembling

procedure (2)

n

Fasten the LD roller shaft holder with two C.B.S 3x6 F/Zn
screws in the order indicated in the following figure.

1

2

Figure 4- 28. Fastening the LD roller shaft hold er

Tightening torque for screw

n
n C.B.S. 3x6 F/Zn screw for LD roller shaft holder unit : 9+/1 kgf.cm

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4.2.8 HP/PE/IC Sensor removal

n

1. Remove the Housing from the printer. (Section 4.2.1 Housing removal)

2. Remove the LD roller from the LD roller shaft holder. (Section 4.2.7 LD Roller
removal)

3. Remove HP/IC detection lever from the LD roller shaft holder and disconnect the cable
from the sensor connector.

HP/IC detection lever

HP/PE/IC sensor

CHECK

POINT

Tor

Make sure that the Torsion spring 0.22 is hung to the following
suitable position.

Torsion spring 0.22

PE sensor lever

Figure 4-31. Torsion spring 0.22 for PE sensor lever

HP/IC sensor lever

Figure 4-29. Removing the HP/IC detection lever

4. Release the two fixing hooks for the sensor from the LD roller shaft holder and remove
the sensor.

Two fixing hooks

Torsion spring 0.22

Figure 4-32. Torsion spring 0.22 for HP/IC sensor lever

Figure 4-30. Releasing two fixing hooks for the sensor

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CHECK

POINT

n Make sure that the HP/PE/IC sensor cable is placed to the

suitable groove on the LD roller shaft holder.

HP/PE/IC sensor cable

HP/PE/IC sensor

Figure 4-33. Sensor cable placing position (1)

HP/PE/IC sensor cable

Figure 4-34. Sensor cable placing position (2)

n

Make sure that the each sensor lever turn back smoothly by
moving it after the sensor was assembled to the LD roller shaft
holder.

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4.2.9 Ink system unit removal (Cap & Pump unit )

1. Remove the Housing from the printer. (Section 4.2.1 Housing removal)

2. Remove the Waste drain ink pad from the printer. (Section 4.2.5 Waste drain ink pad
unit removal)

3. Remove three screws (C.B.S. 3x6, F/Zn screw: 2pcs, C.B.S. TITE 3x6, R, F/Uc screw:
1pcs) securing the Ink system frame and the Cap assembly to the frame.

C.B.S TITE 3X6, R,F/Uc screw

C.B.S. 3X6 F/Zn screws

CAUTION

n Since the compression spring is included in the Pump assembly,

watch out for the spring and the gear that pop out from the unit
when the Pump assembly is removed from the Ink system unit.

n When replacing the cleaner head built in the Pump assembly, be

careful of the following points.

1) Do not touch the cleaner head with your bare hands. Ware
gloves or use tweezers.

2) Do not smear the head cleaner with oil or grease.

n When installing the Cleaner head, set the rubber side (black side)

facing toward the right side of the frame.

n When installing the Cleaner head, set the two square cut offs on

the Cleaner head into the two hooks on the Ink system.

Cleaner head

Figure 4-35. Removing three screws securing the Ink system

4. Remove the Ink system unit (Cap & Pump unit) carefully along with the PF motor &
Ink system frame.

n When replacing the Cap Assembly, do not touch the sealing

rubber portion of the Cap Assembly.

hook & cut off

n The component parts in the Pump Assembly are not individually

CAUTION

When the Ink system unit is removed, be careful that the gears do
not come off from each shaft on the Ink system frame.

supplied as ASP. So please replace the whole Pump Assembly
when replacing the Pump Assembly.

n Be careful not to crush or leave any stress on the ink tube

connecting the pump assembly and the cap assembly.

5. Release one hook for Cap assembly on the Ink system frame and take the Cap
assembly out from the Ink system frame.

6. Disconnect the waste drain ink tube carefully from the bottom of the Cap assembly.

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CHECK

POINT

n Make sure that all gears are set in each gear shaft on the Ink

system frame. The Combinati on gear 9.6, 33.6 must be set firs t on
the Ink system frame.

Combination gear 9.6, 33.6

Combination gear

8.4,21.6

Spur gear 34.2

Combination gear

12.6, 18.4

Spur gear 15.2

Figure 4-36. Gear engagement on the Ink system frame

n

Make sure that the ink tube is placed along the following
position.

Cap assembly

n Tightening torque for screw

• C.B.S. 3x6 F/Zn screw for Ink system frame & Cap assy.: 9+/1 kgf.cm

• C.B.S. TITE 3x6 F/Uc screw for Ink system frame : 9+/-1 kgf.cm

Pump unit

Ink tube

Figure 4-37. Ink tube placing position

After installing the Pump Assembly, ensure that the cleaner

n

parts move back and forth by rotating the Gear.

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4.2.10 Paper Eject Roller removal

1. Remove the Housing from the printer. (Section 4.2.1 Housing removal)

2. Remove three screws (C.B.S. 3x6, F/Zn screw,:2pcs, C.B.S, 3x5,F/CU screw) securing
the Front frame to the Main frame.

C.B.S. 3X5, F/CU screw

C.B.S 3X6, F/Zn screw

Figure 4-38. Removing the Front frame

3. Lift up the right side of the Front frame and slide it to the left side a little bit and then
remove it.

CAUTION

When removing the Front frame, if the CR unit is out of the CR
home position, the nozzle surface of the Printhead may come in
contact with Paper guide front as soon as the Front frame is
removed. This is because the CR unit is held with this frame.
Therefore, be sure to set the CR unit in the CR home position
before removing the Front frame. Otherwise, the dot missing
problem may occur.

4. Slide the Paper eject roller carefully to the left side and remove the P aper eject roller to
the forwar d.

Paper eject roller

Step2

Step1

Figure 4-39. Slide the Paper eject roller

CAUTION

Do not damage the tooth of the Spur Gear 15, EJ, with the round
hole on the Main frame.

Paper eject roller

Spur Gear 15, EJ

.

Figure 4-40. Spur Gear 15, EJ

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ADJUSTMENT

REQUIRED

n When you replace the Frame front, make sure to lubricate the

specific amount of G26 to the Frame front. Refer to the Chapter
6 Figure6-8.

n When you replace the Paper eject roller with new one, make sure

to lubricate the specific amount of G26 to the Spur gear 15, EJ.
Refer to the Chapter 6 Figure6-10.

n Assemble the Paper eject roller in the following procedure.

1. Set the Spur Gear 15, EJ to the cut out hole in the Main frame.

2. Set the narrow portions of the shaft in the Paper eject roller to the
shaft guide holders on the Front paper guide.

3. Slide the Paper eject roller to the right side carefully and engage the
gear with the Combination gear 12.6, 18.4 and the Spur gear 34.2.

n When you assemble the Front frame to the Printer mechanism,

set the CR unit to the left side and assemble the Front frame
from the right side. Be careful not damage the CR lock lever.

n Fasten the Front frame with C.B.S. Screw 3x6, F/Zn in the order

of 1,2,3.

2

3

1

n Tightening torque for screw

• C.B.S. 3x6 F/Zn screw for Front frame : 9+/-1 kgf.cm

• C.B.S. 3x5 F/Uc screw for Front frame : 9+/-1 kgf.cm

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4.2.11 Paper feed roller removal

1. Remove the Housing from the printer. (Section 4.2.1 Housing removal)

2. Remove the Paper Eject roller. (Section 4.2.10 Paper Eject Roll er removal)

3. Release the PF grounding spring from the Main frame.

PF grounding spring

Figure 4-41. Releasing the PF grounding spring

4. Set the CR unit to the home position.

5. Release one hook located on the left edge of the Front paper guide.

6. Lift up the left edge of the Front paper guide while slanting the Front paper guide by
pulling up its front edge, and then slide the Front paper guide to the left side after
releasing the right hook on the Front paper guide.

Step1

Step1

Paper guide front

Step2

Figure 4-43. Remove the Front paper guide.

7. Fit the protrusions of the Left PF roller bushing to the notches in the frames as shown
in the following figure and remove the PF roller fasten spacer with tweezer.

Left PF roller bushing

1

2

PF roller fasten spacer

hook

Front paper guide

Figure 4-44.

Fit the protrusions of the Left PF roller bushing to each notches

Figure 4-42. Release two hooks of the Front paper guide

8. Slide the Left PF roller bushing to right side as above figure Step 2.

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EPSON Stylus COLOR 480 Revision A

9. Fit the protrusions of the Right PF roller bushing to th e notches in the frames as shown
in the following figure

Right PF roller bushing

Figure 4-45. Fit the protrusions of the Left PF roller bushing to each

notches

10. Slide the PF roller to the left side along with the both PF roller bushings and remove
the PF roller from the printer mechanism.

CHECK

POINT

n After assemble the PF roller, make sure that the dowel of the

both left and right PF roller bushing holder fit in the cut hole of
both frames.

n After assemble the Front paper guide to the printer mechanism,

make sure that the hooks and t he dowel pins on the Front paper
guide is set to the fitting positions secure. Slide the Front paper
guide to the right side by pushing it and make sure that the right
hook on the Front paper guide is locked to the frame securely.
If the Front paper guide is not fixed securely to the suitable
position, it may cause the paper jam problem.

Right hook

Two dowel pins

Figure 4-46. Front paper guide assembling notice

ADJUSTMENT

REQUIRED

n When you replace the PF roller with new one, be sure to

lubricate a specific amount of G-26 between the Left PF roller
bushing holder and the left edge of the PF roller. Refer to
Chapter 6 Figure6-5.

n When you assemble the Paper guide front to the Printer

mechanism, set the CR unit to the home position and assemble
the Paper guide front.

n When you assemble the Front frame to the Printer mechanism,

set the CR unit to the left side and assemble the Front frame
from the right side. Be careful not damage the CR lock lever.

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4.2.12 CR unit removal

1. Remove the Housing from the printer. (Section 4.2.1 Housing removal)

2. Take the CR timing belt off the CR pinion gear by pushing the CR motor to the left.

CR timing belt

4. Release two CR guide shaft rod springs from the both hooks on the left and right sides
of the Main frame.

Left CR guide shaft rod spring

Figure 4-47. Taking the CR timing belt off

3. Release the Printhead FFC from the cable holders on the LD roller shaft holder.
And disconnect the Printhead FFC from the connector CN4 on the Main board.

Figure 4-48. Taking Printhead FFC off

Figure 4-49. Release Left Rod spring for CR shaft

Right CR guide shaft rod spring

Figure 4-50. Release Right Rod spring for CR shaft

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5. Pull the left edge of the CR guide shaft upward to align it with the round cutout
portion. Then, holding the CR unit by hand , rem ove the C R gu ide shaft by slidin g it to
left or right.

CHECK

POINT

n Unlike the previous products, the oil pad is not built in the CR

unit.

n Make sure that the tips of the CR guide shaft rod springs are set

in the holes in the Main frame.

n Make sure that the CR guide shaft rod springs are correctly set

in the suitable position. Refer to Figure 4-49,Figure 4-50.

n If you disassemble the CR unit after removing the CR unit from

the printer, make sure that the CR Grounding plate is assembled
in the suitable position in the CR unit. Refer to Figure 4-52.

n .Make sure that the CR slider is assembled on the CR unit.

CR guide shaft

CR Grounding plate

Figure 4-51. Removing the CR guide shaft

CAUTION

Remove the CR guide shaft while holding the CR unit by hand. If
you remove the CR guide shaft without holding the CR unit, the
nozzle surface of the Printhead may come in contact with the
Paper guide front, which causes the dot missing problem.

CR slider

Figure 4-52. Grounding plate assembling position

If you remove the Printhead from the CR unit, make sure that

n

the Head grounding plate is set in the CR unit. Refer to
Figure4-7.

n Make sure that the groove on the CR guide shaft must be set to

the left side.

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CHECK

POINT

ADJUSTMENT

REQUIRED

n If the CR unit is disassembled or replaced with a new one, make

sure that the CR timing belt is set in the assembling groove
correctly as following figure.

Assembling groove

CR timing belt

Figure 4-53. CR timing belt setting position

n When you replace the CR unit with a new one, lubricate it with

the suitable amount of the G-55 grease by the specified position.
Refer to Chapter 6 Figure 6-4.

n When you replace the CR Pulley shaft with new one, lubricate it

with the suitable amount of G-26 grease by the specific position.
Refer to Chapter 6 Figure6-6.

n When removing or replacing the CR unit with a new one, adjust

the Gap (Bi-d). Refer to xxx

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4.2.13 Disassembling ASF frame unit

1. Remove the Housing from the printer. (Section 4.2.1 Housing removal)

2. Remove the LD roller shaft holder unit (Section 4.2.7 LD Roller removal)

3. Remove two screws (C.B.S.-TITE (P4), 3x6, F/Zn screw, C.B.S. Screw 3x6,F/Zn +
Plain washer 3.2 x1x 7,F/Zn) securing the ASF frame unit and remove the ASF frame
unit from the printer mechanism.

C.B.S TITE(P4), 3X6, F/Zn screw

ASF Frame unit

C.B.S. Screw 3x6, F/Zn

Plain washer 3.2x1x7,F/Zn

Figure 4-54. Removing the screws securing the ASF frame

4. Remove the following gears from the ASF frame.

n

Combination gear 11.2, 32.4

Change lever unit

Combination gear 11.2, 32.4

Combination gear 22.4, 32

Figure 4-55. Removing the Gears from ASF frame unit

5. Remove the Compression Spring 2.67 located between the ASF Frame and the Hopper,
and remove the Hopper from the ASF frame.

ASF Hopper

Compression spring 2.67

n

Combination gear 22.4, 32

n

Change lever unit

ASF Frame

Figure 4-56. Removing the Compression spring 2.67

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6. Remove the Torsion spring 25.7 from the bottom of the ASF frame and the Pad holder
(Paper return plate).

CHECK

POINT

n Make sure that the each tip of the Torsion spring 25.7 is set in the

slot of the Pad holder and ASF frame. Refer to Figure 4-57.

n Make sure that the Pad holder moves smoothly after assembling

it to the ASF frame.

n Make sure the change lever setting position. Refer to following

figure.

Torsion spring 25.7

ASF Frame

Figure 4-57. Removing the Torsion spring 25.7

7. Remove the Pad holder (Paper return plate) from the ASF frame.

Pad holder

ASF Frame

Figure 4-59. Change lever setting position

Figure 4-58. Removing the Pad holder (Paper return plate)

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.

n When you replace the ASF frame or Hopper with the new one,

make sure to lubricate the specific amount of G26 into the groove
on ASF frame. Refer to Figure 6-7 & Figure6-9 in the Chapter 6.

n Fasten the ASF unit C.B.S. TITE (P4) 3x6,F/Zn screw (left s crew

in the following figure), Plain washer 3.2x1x7,F/Zn & C.B.S
3x6,F/Zn screw (right screw in the following figure) in the order
of followi n g figure.

1

Figure 4-60. ASF fixing screws fastening order

Tightening torque for screw

n

• C.B.S. 3x6 F/Zn screw for ASF : 9+/-1 kgf.cm
(right screw in above figure)

• C.B.S. TITE(P4) 3x6, F/Zn screw for ASF : 9+/-1kgf.cm
(left screw in above figure)

2

Disassembly and Asse mbly Disassembly 97

ADJUSTMENT

CHAPTER

EPSON Stylus COLOR 480 Revision A

5.1 Overview

This section describes the procedure for adjustments required when the printer is
disassembled and assembled for repair or service.

5.1.1 Required Adjustment

Table 5-1 lists all the necessary adjustments for this printer. If any serv ice listed in this
table is carried out, all adjustments corresponding to that service item should be
performed to ensure proper operation of the printer.

Table 5-1. Required Adjustment

Performance Priority 1 2 3 4

Replacing parts/Service item

Replacing the Main Board. NA
Replacing the printhead unit.
Replacing the CR motor. NA NA
Replacing or removing the CR

assembly.

Initial Ink

Charge

Q R S NA

NA NA

Head ID

Setting

QRNA

Bi-D

Adjustment

Q NA

Q NA

Ink pad

Counter

reset

This section describes the detailed procedures of each adjustment by Adjustment
Program.

In this printer, it is necessary to set the adjusting information for each printer
mechanism in order to maintain consistent printing function and quality, eliminating
differences of each printer mechanism’s characteristics. Therefore, in case that the
combination of the printer mechanism and main board changes or the print head is
replaced during the repair service, you must set and sav e the corr ect information to the
MAIN board, using the exclusive adjustment program.

This section describes the detailed procedures of each adjustment by Adjustment
Program.

W ARNING

In case any parts is removed and assembled on the repair product
while running the Adjustment program, turn off the printer certainly.

Replacing the Waste drain ink
pad

NA NA

NA

Q

NOTE: “¡”: Required Adjustment. The number in the circle shows the

required adjustment order.
“NA”: Not applicable.

NOTE: Following adjustments are not required on this product.

- Platen G ap adjustment

- Head Angular adjustme nt .

- USB ID input

NOTE: When the Main board is replaced with new one, you may have to

replace the following parts also in case the EEPROM parameter back
up function is not available on the defective main board.
* Waste drain ink pad
* Both Black & Color Ink Cartridge

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EPSON Stylus COLOR 480 Revision A

5.1.2 Adjustment Program feature

This adjustment program is exclusive for Windows: the OS that allows operation of
this program is Windows 95/98. The following shows programs included in this
program.

CHECK

POINT

This adjustment program is composed of following two main programs.

n This adjustment program oper ates only under Windows 95/98:

This program does not operate under DOS o r Windows 3.X, NT.

n This adjustment program automatically install the appropriate

program according to your OS.

n Perform this adjustment program using parallel I/F port.

o Individual service adjustment program

This program provides you the adjustment item individually as same as the
previous adjustment program. The available functions are as following table.

Table 5-2. Individual service adjustment program

No. Main Menu Service

1Adjustment

2 Maintenance

Protection counter check / reset

3 A4 check patt ern print A4 check pattern print

The user interface of the main menu on this program is shown below.

Head ID input

Bi-d adjustment

Head cleaning

Initial ink charge

Refurbishment for DOA

EEPROM check / write

Figure 5-1. Individual service adjustment program main menu

Adjustment Overview 100