Epson stylus iis 820 schematic

Download

EPSONTERMINALPRINTER

StylusTMCOLOR IIs&StylusTM820

SERVICEMANUAL

EPSON

4005245

NOTICE

The contents of this manual are subjects to change without notice. All efforts have been made to ensure the accuracy of the contents of this manual. However, should any errors

be detected, SEIKO EPSON would greatly appreciate being informed of them. The above notwithstanding SEIKO EPSON can assume no resoinsibility for any errors in this manual or the

consequence thereof. Epson and Epson’s ESC/P are registered trademark of Seiko Epson Corporation. General Notice: Other product names used herein are for identication purpose only and may be trademark of

their respective companies.

-i-

PRECAUTIONS

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

DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury.

Great caution should be exercised in performing procedures preceded by DANGER Headings.

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

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

DANGER

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

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

3. WHEN PERFORMING TESTING AS DCTATED 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 THATTHE 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 INTERNALCOMPONENTS.

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

-ii-

PREFACE

This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of Stylus Color IIs / Stylus 820. The instructions and procedures included herein are intended for the experience repair technician, and attention should be given to the precautions on the preceding page. The chapters are organized as follows:

CHAPTER 1. PRODUCT DESCRIPTION

Provides a general product overview, lists specifications, and illustrates the main components of the printer.

CHAPTER 2. OPERATING PRINCIPLES

Describes the theory of printer operation.

CHAPTER 3. DISASSEMBLY AND ASSEMBLY

Includes the step-by-step guide for product disassembly and assembly

CHAPTER 4. ADJUSTMENTS

Includes a step-by-step guide for adjustment.

CHAPTER 5. TROUBLESHOOTING

Provides Epson-approved techniques for adjustment.

CHAPTER 6. MAINTENANCE

Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.

APPENDIX

Describes connector pin assignments, circuit diagrams, circuit board component layout and exploded diagram.

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

-iv-

REVISION SHEET

Revision Issue Date Contents

Rev.-A August 25,1995 1st issue

-v-

CHAPTER 1. PRODUCT DESCRIPTION CHAPTER 2. OPERATION PRINCIPLES

CHAPTER 3 DISASSEMBLY AND ASSEMBLY CHAPTER 4. ADJUSTMENT

CHAPTER 5. TROUBLESHOOTING CHAPTER 6. MAINTENANCE APPENDIX

-vi-

Chapter 1 Operating Principles

Table of Contents

1.1 OVERVIEW 1-1

1.2 SPECIFICATIONS 1-1

1.2.1 PrintingSpecifications ......................................1-2

1.2.2 PaperHandlingSpecifications................................1-4

1.2.3 PaperSpecifications ........................................1-4

1.2.4 InkCartridgeSpecifications..................................1-6

1.2.5 ElectricalSpecifications.....................................1-7

1.2.6 EnvironmentalSpecifications.................................1-7

1.2.7 Reliability..................................................1-8

1.2.8 Safety Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

1.2.9 AcousticNoise.............................................1-8

1.2.10 PhysicalSpecifications.....................................1-8

1.3 INTERFACE SPECIFICATIONS 1-9

1.3.1 ParallelInterfaceSpecifications...............................1-9

1.4 OPERATION CONTROLS 1-11

1.4.1 ControlPanel .............................................1-11

1.4.2 PanelOperationandBuilt-inFunction.........................1-11

1.4.3 DefaultSettings...........................................1-14

1.4.3.1 Setting Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

1.4.3.2 Setting Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.4.4 ErrorConditions...........................................1-18

1.4.5 PrinterInitialization ........................................1-18

1.4.5.1 Hardware Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

1.4.5.2 Sofware Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

1.4.5.3 PanelInitialization...................................1-18

1.5 MAIN CONPONENTS 1-19

1.5.1 MainControlBoard(C160MainControlBoard) .................1-19

1.5.2 PowerSupplyBoard(C160PSB/PSEBoard)....................1-20

1.5.3 C160I/FBoard ............................................1-20

1.5.4 PrinterMechanism((M-4C10).................................1-21

1.5.5 Housing..................................................1-21

Rev. A 1-i

List of Figures

Figure1-1.ExteriorViewoftheStylusColorIIs(820).................. 1-1

Figure1-2.NozzleConfiguration................................... 1-2

Figure1-3.PrintableArea......................................... 1-4

Figure1-4.PaperSelectLever..................................... 1-5

Figure1-5.Temperature/HumidityRange........................... 1-7

Figure1-6.DataTransmissionTiming.............................. 1-9

Figure1-7.ControlPanelAppearance............................. 1-11

Figure 1-8. C160 Main Control Board Component Layout . . . . . . . . . . . . . 1-19

Figure1-9.C160PSB/PSEBoardComponentLayout ................ 1-20

Figure1-10.C160I/FBoardComponentLayout..................... 1-20

Figure1-11.M-4C10PrinterMechanism............................ 1-21

Figure1-12.Housing............................................ 1-21

List of Tables

Table1-1. PrintSpeedandPrintableColumn........................ 1-2

Table1-2.CharacterTables....................................... 1-3

Table1-3. PaperSpecifications ................................... 1-4

Table1-4. AdjustLeverSettings................................... 1-5

Table1-5. PaperSelectLeverSettings ............................. 1-5

Table1-6. BlackI/CSpecifications................................. 1-6

Table1-7. ColorI/CSpecifications................................. 1-6

Table1-8. RatedElectricalRanges................................. 1-7

Table1-9. AcceptableEnvironmentalConditions..................... 1-7

Table 1-10. Siganal and Connector Pin Assignment for Parallel I/F . . . . . 1-10

Table1-11. PanelOperation ..................................... 1-11

Table1-12. Built-inFunctionsonthePanel......................... 1-12

Table 1-13. Button Operations in Default Setting Mode. . . . . . . . . . . . . . . 1-12

Table1-14. ErrorIndicators...................................... 1-13

Table 1-15. Default Setting Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Table1-16. LanguageSelections................................. 1-15

Table1-17.FeatureSelections.................................... 1-16

Table1-18. CharacterTableSelection............................. 1-17

1-ii Rev. A

Stylus Color IIs / Stylus 820 Product Description

1.1 FEATURES

The Stylus Color IIs printer is a color ink jet dot matrix printer that comes with a 64-nozzle black printhead and a 60-nozzle CMY color printhead, either of which can be installed in the printer. The Stylus 820 version of the same printer comes standard with only the 64-nozzle black printhead; however, the CMY color printhead can be purchased as an optional upgrade. Whenever this manual mentions the Stylus Color IIs, its descriptions are equally applicable to the Stylus 820. The major printer features are:

❏ High-quality color print

-720 dpi printing

-720 dpi printing on plain paper

-720, 360 dpi printing on special coated paper (Use the monochrome head only with plain paper)

❏ High-speed print

-LQ 125 cps (monochrome head)

-LQ 170 cps (CMY head, using one-pass printing)

Note: The CMY head prints 360 dpi printing in three passes. ❏ Built-in auto sheet feeder

-Plain paper (Can be installed up to the hopper guide marker.)

-Transparency film (Can be installed up to the hopper guide marker.)

-Glossy paper (1-sheet only)

-Coated paper (Can be installed up to the hopper guide marker.)

-Envelopes (30 sheets)

-Postcards (30 sheets)

❏ Built-in I/F

-Parallel I/F only (8-bit parallel: IEEE P1284 mode)

❏ Easy setup

-No DIP switches

❏ 3 scalable fonts and 3 LQ fonts standard

-Roman T, Sans Serif H, Roman, Sans Serif (scalable)

-Roman, Sans Serif, Courier, Prestige, Script (LQ, bitmap)

❏ Character tables

-9 character tables (standard version)

-15 character tables (NLSP version)

❏ Low running cost The figure below shows the Stylus Color IIs.

Figure 1-1. Exterior Viewing of Stylus Color IIs(820)

Rev. A 1-1

Product Description Stylus Color IIs / Stylus 820

1.2 SPECIFICATIONS

This section provides statistics and other detailed information for the printer.

1.2.1 Printing Specifications

Print system: On-demand ink jet system Nozzle configuration:

64 nozzles (10 × 2+11× 4 standard ): monochrome 60 nozzles (20 × 3 standard): color

120 dpi

360 dpi

#19

#1 #1

#2 #2 #2

#19

#20

#19

#20 #20

(Row M) (Row C) (Row Y)

#59

#60

(A) (B) (C) (D) (E) (F)

#61

#64

#62

#63

Figure 1-2. Nozzle Configuration

Printing direction: Bidirectional with logic-seeking

Table 1-1. Print Speed and Printable Columns

Character

Pitch

10 cpi (Pica) 80 125 170 12 cpi (Elite) 96 150 204

15 cpi 120 188 255 17 cpi (Pica condensed) 136 214 290 20 cpi (Elite condensed) 160 250 340

Printable Columns

Printing Speed (cps)

Monochrome CMY

1-2 Rev. A

Stylus Color IIs / Stylus 820 Product Description

Character tables: Legal and 14 international sets

Table 1-2. Character Tables

Bitmap Fonts Scalable Fonts

Character Tables

Italic PC437 (U.S./Standard Europe) PC850 (Multilingual) PC860 (Portuguese)

Standard

NLSP

Fonts: Bitmap LQ fonts

PC861 (Icelandic) PC863 (Canadian-French) PC865 (Nordic) Abicomp BRASCII Italic PC437 (U.S./Standard Europe) PC850 (Multilingual) PC437 (Greek) PC852 (East Europe) PC853 (Turkish) PC855 (Cyrillic) PC857 (Turkish) PC866 (Russian) PC869 (Greek) MAZOWIA (Poland) Code MJK (Czecho/Slovakia) ISO 8859-7 (Latin/Greek) ISO Latin 1T (Turkish) Bulgaria (Bulgaria)

- EPSON Roman (10 cpi/12 cpi/15 cpi/Proportional)

- EPSON Sans Serif (10/12/15/Proportional)

- EPSON Courier (10/12/15)

EPSON Roman EPSON Sans Serif EPSON Courier

Supported Supported Supported

Supported Supported Not supported

EPSON Roman EPSON Sans Serif

EPSON Roman T EPSON Sans Serif H

Scalable fonts

- EPSON Roman 10.5 points, 8 ∼ 32 points (in units of 2 points)

- EPSON Sans Serif 10.5 points, 8 ∼ 32 points (in units of 2 points)

- EPSON Roman T 10.5 points, 8 ∼ 32 points (in units of 2 points)

- EPSON Sans Serif H 10.5 points, 8 ∼ 32 points (in units of 2 points)

Control codes: ESC/P 2 and expanded raster graphics codes Input data buffer: 0.5KB or 64KB

Rev. A 1-3

Product Description Stylus Color IIs / Stylus 820

1.2.2 Paper Handling Specifications

Feeding method: Friction feed paper is fed from the built-in auto sheet feeder (ASF). Line spacing: 1/6 inch feed or programmable in 1/360 inch minimum increments. Paper path: Cut sheets are fed from the built-in auto sheet feeder (ASF).

Top in and front out.

Feeding speed: 102 msec. (at 1/6-inch feed pitch).

1.2.3 Paper Specifications Table 1-3. Paper Specifications

Cut Sheets

Envelopes

Transparencies

A4 Letter Legal No. 10 DL

Width 210 mm 216 mm 216 mm 240 mm 220 mm

Length 297 mm 279 mm 358 mm 104 mm 110 mm

LM Left margin

RM Right margin

TM Top margin

BM Bottom margin

3 mm or more

14 mm or more

3 mm or more

14 mm or more

3 mm or more

14 mm or more

3 mm or more

14 mm or more

3 mm or more

14 mm or more

Figure 1-3. Printable Area

1-4 Rev. A

Paper In

Paper Out

Manual Feed

Auto Feed

Hopper

Paper Select Lever

Thicker Paper

Thinner Paper

Stylus Color IIs / Stylus 820 Product Description

The adjust lever on the upper case must be set to the proper position for the paper thickness, as shown in Table 1-4.

Table 1-4. Adjust Lever Settings

Lever Position Paper Paper Thickness

Front

(0 position)

Rear

(+ position)

Also the paper select lever on the upper case must be set to the proper position for the paper varieties shown in Table 1-5.

Normal position 0 mm

Table 1-5. Paper Select Lever Settings

Specifications for the Medium

PF Mode Cut Sheets

Thick paper (Rear) NO OK

ASF Feed

Thinner paper (Front) OK NO Thick paper (Rear) OK OK

Manual Feed

Thinner paper (Front) NO NO

Lever Position

0.62 mm

Envelopes

Postcards

Figure 1-4. Paper Select Lever

Note:

Rev. A 1-5

“OK” means paper can be used and “NO” means paper cannot.

Product Description Stylus Color IIs / Stylus 820

1.2.4 Ink Cartridge Specifications

Table 1-6. Black I/C Specifications

Item Specifications

Type Exclusive cartridge Color and Weight Ink Life High-quality ink produces 800 thousand characters Validity 2 years (sealed in package) / 6 months (out of package)

Storage Temperature

Dimensions

Approximately 54 g (internal ink weight is 36 g ± 0.5 g)

❏ –30 to 40° C(−22 ∼ 104° F) (Storage: a month or less at 40° C (104° F)) ❏ –20 to 40° C(−15 ∼ 104° F) (Transit: a month or less at 40° C (104° F)) ❏ –30 to 60° C(−22 ∼ 140° F) (Transit: 120 hours or less at 60° C (140° F))

30.0 (W) × 58.0 (D) × 38.5 ± 0.3 (H) mm

Table 1-7. Color I/C Specifications

Item Specifications

Type Exclusive cartridge Color and Weight Ink Life 100% solid pattern: A4 — 16 sheets / each color Validity 2 years (sealed in package) / 6 months (out of package)

Storage Temperature

Approximately 70 g (internal ink weight is 12.8 g ± 0.5 g)

Dimensions

42.9 (W) × 56.5 (D) × 38.5 ± 0.3 (H) mm

1-6 Rev. A

80%

55%

20%

Humidity (% RH)

Guaranteed Range

(Degrees)

10 27 35

Stylus Color IIs / Stylus 820 Product Description

1.2.5 Electrical Specifications Table 1-8. Rated Electrical Ranges

Specification 120 V Version 220 - 240 V Version

Rated voltage 120 VAC 220 - 240 VAC Input voltage range Rated frequency range Input frequency range

103.5 ∼ 132 V 198 ∼ 264 V 50 ∼ 60 Hz 50 ∼ 60 Hz

49.5 ∼ 60.5 Hz 49.5 ∼ 60.5 Hz

Rated current 0.5 A 0.3 A Power consumption

Insulation resistance

Dielectric strength

Approx. 13 W

(self-test with 10-cpi LQ characters)

10 MΩ, minimum

(applying 500 VDC between AC line

and chassis)

1000 VAC rms for 1 minute or

1200 VAC rms for 1 second

(between AC line and chassis)

(self-test with 10-cpi LQ characters)

(applying 500 VDC between AC line

(between AC line and chassis)

Approx. 13 W

10 MΩ, minimum

and chassis)

1500 VAC rms for 1 minute

1.2.6 Environmental Conditions Table 1-9. Acceptable Environmental Conditions

Condition Operating Non Operating

*1, 3

−20 ∼ 60° C (−4 ∼ 122° F) 5 ∼ 85% RH

Temperature Humidity

10 ∼ 35° C (50 ∼ 95° F)

20 ∼ 80% RH Shock resistance 1G (within 1 msec.) 2G (within 2 msec.) Vibration resistance 0.15 G 0.50 G

: For printer operation, conditions must be in the range shown in the figure below.

: These conditions are applicable when the printer is in its shipping container.

: Without condensation.

*2, 3

Figure 1-5. Temperature / Humidity Range

Rev. A 1-7

Product Description Stylus Color IIs / Stylus 820

1.2.7 Reliability

Total print volume: 25,000 pages (A4, letter) Printhead life: 500 million dots/nozzle (color and monochrome)

1.2.8 Safety Approvals

Safety standards: 120 V version: UL1950 with D3,

CSA C22.2 # 950 with D3

220-240 V version: EN 60950 (TÜV, SEMKO, DEMKO,

NEMKO, SETI)

Radio frequency interference (RFI): 120 V version: FCC Part 15 Subpart B Class B

220-240 V version: Vfg.243 (VDE0878 part 3, part 30)

EN55022 (CISPR PUB. 22) class B CSA C108.8

1.2.9 Acoustic Noise

Level: Approximately 45 dB (A) (Per ISO 7779)

1.2.10 Physical Specifications

Dimensions (W × D × H): 396.7 mm (W) × 205.6 mm (D) × 144.0 mm (H) Weight: About 3.9 kg (8.6 lb.), excluding head and ink cartridge

1-8 Rev. A

Stylus Color IIs / Stylus 820 Product Description

1.3 INTERFACE SPECIFICATIONS

The Stylus Color IIs is standard-equipped with an 8-bit parallel and serial interface.

1.3.1 Parallel Interface Specifications

Data format: 8-bit parallel Synchronization: By Handshaking: By BUSY and Signal level: TTL compatible level Adaptable connector: 36-pin 57-30360 (Amphenol) or equivalent

STROBE pulse synchronization

ACKNLG signals

BUSY

ACKNLG

5 µsec (min.)

DATA

STROBE

0.5 µsec (min.)

Figure 1-6. Data Transmission Timing

Data transmission timing: See Figure 1-6.

0 µsec(min.)

Note:

The Busy signal is active (HIGH) under the following conditions:

The

The PE signal is active (HIGH) under the following conditions:

Transition time (rise time and fall time) of every input signal must be less than 0.2 µs.

❏ During data reception (See Figure 1-6.) ❏ When the input buffer is full ❏ When the ❏ During initialization ❏ When the ❏ During the self-test mode ❏ During the demonstration mode ❏ During the default setting mode ❏ When a fatal error occurs

ERROR signal is active (LOW) under the following conditions:

❏ When a paper-out error occurs ❏ When a no ink cartridge error occurs ❏ When a fatal error occurs

❏ When a paper-out error occurs ❏ When a fatal error occurs

INIT input signal is active

ERROR or PE signal is active

Rev. A 1-9

Product Description Stylus Color IIs / Stylus 820

Table 1-10 shows the connector pin assignments and signal functions of the 8-bit parallel interface.

Table 1-10. Signal and Connector Pin Assignments for Parallel Interface

Pin No. Signal Name I/O* Description

STROBE pulse is used to read data from the host

The

2-9 DATA 1-8 I

11 BUSY O

STROBE I

ACKNLG O

computer. The pulse width must be 0.5 µs or more. Normally, it is HIGH, and data is latched with the rising edge of this signal.

DATA 1-8 are parallel data bits. When one of these signals is HIGH, the data bit is 1; when LOW, the data bit is 0. The most significant bit (MSB) is DATA 8. The signal state must be maintained for 0.5 µs on either side of the signal’s active edge.

ACKNLG is an acknowledge pulse with a width of approximately 10 µs. This signal goes LOW upon the

completion of data reception to indicate that the printer is ready to receive further data.

The BUSY signal informs the host computer of the printer’s status. When this signal is HIGH, the printer cannot accept any more data.

STROBE

12 PE O 13 SLCT O

32 35 +5 V —

17 CHASSIS — Chassis ground.

16 GND — Signal ground. 19-30 — — — 33,36 — — Not used.

15,18,34 — — —

AFXT I

INIT I

ERROR O

This signal indicates whether paper is available in the printer or not. A HIGH level indicates no paper.

Pulled up to +5 V through a 1.0 KΩ resistor in the printer. If this signal is set to LOW, the printer automatically performs

one line feed upon receipt of a CR (carriage return) code. The status of this signal is checked only at power on and initialization.

If this signal goes LOW, the printer is initialized. The pulse width of this signal must be 50 µs or more.

This signal goes LOW if the printer has a fatal error or runs out of paper.

Pulled up to +5 V through 1.0 KΩ resistor in the printer.

* The I/O column indicates the direction of the signal as viewed from the printer.

1-10 Rev. A

Stylus Color IIs / Stylus 820 Product Description

1.4 OPERATIONS

This section describes the basic operations of the printer.

1.4.1 Control Panel

The control panel for this printer has 3 non-lock-type push buttons, and 5 LED indicators for easy operation of the various printer functions.

Power

Error

Condensed

Economy

Alt

Load / Eject

Figure 1-7. Control Panel Appearance

1.4.2 Panel Operation and Built-in Function

You can activate the following modes by doing the procedure in table 1-11 and 1-12.

Table 1-11. Panel Operation

Button ^

Operations

Single Button Operations Combined with Alt Button Pressed and released Held down 3 seconds Pressed and released

Pause

Cleaning

Alt

Load/Eject

Pause

Rev. A 1-11

No function

Load/Eject

Pause

I/C or head unit

replacement

No function Economy/Condensed

Reset Cleaning

———

Product Description Stylus Color IIs / Stylus 820

Table 1-12. Built-in Functions on the Panel

Button Alt

Load/Eject Pause Alt + Load/Eject Load/Eject + Pause Pause + Alt Pause + Load/Eject + Pause Other combinations

Table 1-13. Button Operations in Default Setting Mode

Button Alt

Pause

Function

Demonstration printing Self-test Default setting mode (with printing) Non-smear printing Data dump mode (Hex mode) Default setting mode (without printing) Reset to the default settings Not available

Function

Move to the next item or menu Set item

1-12 Rev. A

Stylus Color IIs / Stylus 820 Product Description

Indicators

Power Error

Condensed Economy Pause

LED combinations See Table 1-14.

On when printer is on. Blinks during power on and off. On when printer encounters an error, such as ink end, paper out, paper

jam, etc. On when printer is in the condensed mode (50% or 80%). On when printer is in the economy mode. On when printer is paused.

Table 1-14. Error Indications

Printer Status

Pause Economy Condensed Panel reset accepted

Ink low (printable)

Ink out (unprintable)

Power On

On On On On Blinks

Indicators +

Error Condensed Economy Pause

———On — — On —

On On — —

Blinks On On On

(rapidly)

On — — On

———

Paper out Paper jam Head, I/C replacement Head, I/C not installed

(in replacement mode) Head, I/C not installed Carriage control error Maintenance request

On On On On

On On On

Off — — On Off — Blink On

Blinks — — Blinks

Blinks Off Off Blinks Blinks Blinks Off Blinks Blinks Blinks Blinks Blinks

Rev. A 1-13

Product Description Stylus Color IIs / Stylus 820

1.4.3 Default Settings

The printer can save some printer setting parameters that define its functions at initialization. You can change these parameters using the printer’s default setting mode.

1.4.3.1 Default Setting Items

You can use default setting mode to change settings listed in the table below. Activate default-setting mode by holding down the

turning on the printer.

Pause

or the

Pause

and

Alt

buttons (for default setting mode without printing) while

Table 1-15. Default Setting Items

Item

Character Tables

^ ^ ^

Typestyles

Selections

Standard Version +

Italic USA Italic France Italic Germany Italic UK Italic Denmark Italic Sweden

NLSP Version + Italic USA

Italic France Italic Germany Italic UK Italic Denmark Italic Sweden Italic Italy Italic Spain

Roman Sans Serif

Italic Italy Italic Spain

PC437 PC850 PC860 PC863

PC437 PC850 PC853 PC857 PC437 Greek PC855 PC866 PC852

Courier Roman T (PS) Sans Serif H (PS)

PC865 PC861 BRASCII Abicomp

^ ^

PC869 ISO 8859-7 ISO Latin 1T MAZOWIA Code MJK Bulgaria

10 CPI (10 CPI, Condensed off) 12 CPI (12 CPI, Condensed off)

Character Pitches

15 CPI (15 CPI, Condensed off)

17.1 CPI (10 CPI, Condensed on)

20 CP I(12 CPI, Condensed on) Proportional (PS, Condensed off)

Auto

Print Direction

Bidirectional

Uni-directional

Network I/F Mode

1-14 Rev. A

Off (Usual environment) On (Network environment)

Stylus Color IIs / Stylus 820 Product Description

Table 1-15. Default Setting Items (Continued)

Item

Auto line feed

Loading position

Thick paper

Note:

The underlined value is the factory setting.

Off On

8.5 mm 3 mm

Envelopes Index card (portrait)

Contents

1.4.3.2 Changing the Default Settings

To change the printer’s default settings:

Hold down the firmware version and describes how to select the language used to print messages. You can select a language by pressing the

Pause

button and turn on the printer. The printer outputs a sheet that shows the

Alt

button, and set it by pressing the

Pause

button. (See Table 1-16.)

Table 1-16. Language Selection

Error LED

Condensed

LED

Economy

LED

English

Francias

Deutsch

Italiano

Español

Press the prints a table showing how to change printer settings.

Press the by the to the next setting, and the three font LEDs change according to the selection.

4. After you set all values, turn the printer off to save the new settings.

Pause

Alt

Error,Condensed

button. The printer prints the current settings using the selected language. It also

button to advance through the setting menus. The current printer settings are indicated

, and

On Off Off

Off On Off

On On Off

Off Off On

On Off On

Economy

LEDs. Each time you press the

Pause

button, you advance

Rev. A 1-15

Product Description Stylus Color IIs / Stylus 820

Table 1-17. Feature Selections

Feature/ Menu

Character Table

Print Direction

^ ^ Network

I/F Mode ^ Auto Line

Feed ^ Loading

Position ^ Font ^ ^ ^ ^ Pitch ^ ^ ^ ^ ^ Thick Paper ^

Setting Value

Error

LED

On Off Off See Table 1-18. +

Off On Off

On On Off

Off Off On

On Off On

Off On On

On On On

Off Off Off

Condensed

LED

Economy

LED

Setting

Auto Blinks Off Off Bi-D Blinks On Off

Uni-D Blinks Off On

Off Blinks Off Off On Blinks On Off Off Blinks Off Off On Blinks On Off

3 mm Blinks Off Off

8.5 mm Blinks On Off Roman Blinks Off Off

Sans serif Blinks On Off

Courier Blinks Off On

Roman T Blinks On On

Sans serif H Off Blinks Off

10 CPI Blinks Off Off 12 CPI Blinks On Off 15 CPI Blinks Off On

17.1 CPI Blinks On On 20 CPI Off Blinks Off

Proportional On Blinks Off

Envelopes Blinks Off Off

Index cards Blinks On Off

Error

LED

Condensed

LED

Economy

LED

1-16 Rev. A

Stylus Color IIs / Stylus 820 Product Description

Table 1-18. Character Table Selection

Version

Common ^ ^ ^ ^ ^ ^ ^ ^ ^ Standard ^ ^ ^ ^ ^ NLSP ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^

Settings

Italic U.S.A. Blinks Off Off

Italic France Blinks On Off

Italic Germany Blinks Off On

Italic U.K. Blinks On On

Italic Denmark 1 Off Blinks Off

Italic Sweden On Blinks Off

Italic Italy Off Blinks On

Italic Spain 1 On Blinks On

PC437 Off Off Blinks PC850 On Off Blinks PC860 Off On Blinks PC863 On On Blinks PC865 Blinks Blinks Off PC861 Blinks Blinks On

BRASCII Off Blinks Blinks

Abicomp On Blinks Blinks

PC437 Greek Blinks Blinks Off

PC853 Off On Blinks PC855 Blinks Blinks Off PC852 On Blinks Blinks PC857 On On Blinks PC866 Off Blinks Blinks

PC869 Blinks Off Blinks MAZOWIA Off On On Code MJK On On On

ISO 8859-7 Blinks On Blinks

ISO Latin 1T Blinks Blinks Blinks

Bulgaria Off Off Off

Error LED

Condensed

LED

Economy

LED

Rev. A 1-17

Product Description Stylus Color IIs / Stylus 820

1.4.4 Error Conditions

The printer can detect various errors and indicate them with LEDs. Refer to Table 1-14.

1.4.5 Printer Initialization

There are three initialization methods: hardware initialization, software initialization, and panel initialization.

1.4.5.1 Hardware Initialization

Hardware initialization is performed by:

- Turning on the printer.

- Sending the parallel interface the (If the

INIT signal is active when the printer is turned on, hardware initialization is started when the INIT

signal becomes inactive.) When hardware initialization is performed:

- The printer mechanism is initialized.

- Input data buffer is cleared.

- Downloaded character definitions are cleared.

- Print buffer is cleared.

- Default values are set.

INIT signal.

1.4.5.2 Software Initialization

Software initialization is performed upon receipt of the control code ESC @. When software initialization is performed:

- The print buffer is cleared.

- Default values are set.

1.4.5.3 Panel Initialization

Panel initialization is performed by holding down the Alt button for 3 seconds. When the panel initialization is performed:

- The input data buffer is cleared.

- The print buffer is cleared.

- Default values are set.

1-18 Rev. A

CN1

CN2

CN3

CN4

CN5

CN6

CN7

CN8

SW3 SW2 SW1

CPU M3772051 (IC2)

E05B08 (IC1)

4M or 8M Bit PROM (IC3)

1M Bit PSRAM (IC4)

8M Bit CG-ROM (IC5)

Stylus Color IIs / Stylus 820 Product Description

1.5 MAIN COMPONENTS

The main components of the Stylus Color IIs are:

❏ Printer mechanism (M-4C10) ❏ Main control board (C160 MAIN Board) ❏ Power supply unit (C160 PSB/PSE Board) ❏ Control panel board (C160 I/F Board) ❏ Housing

1.5.1 Main Control Board (C160 MAIN Board)

The main control board (C160 MAIN Board) consists of an M37720 16-bit CPU, E05B08 gate array, a program ROM (4M), a PS-RAM (1M), a mask ROM (4M or 8M: If a 4M-bit program ROM is mounted on the board, an 8M-bit CG-ROM is mounted in location IC5, and if an 8M-bit program ROM is mounted on the board, there is no CG-ROM in location IC5.) and a 1K EEPROM. The reset IC (M51955 and PST 592) is equipped with both a logic system and a power system.

Note:

During servicing, when you replace the program ROM, always install an 8M-bit program ROM regardless of the components mounted on that particular board. When you do this, the CG-ROM in location IC5 is ignored.

Rev. A 1-19

Figure 1-8. C160 Main Control Board Component Layout

CN1

CN2

JAPAN version only (Serial I/F)

Product Description Stylus Color IIs / Stylus 820

1.5.2 Power Supply Board (C160 PSB/PSE Board)

The power supply board (C160 PSB/PSE Board) consists of an RCC switching regulator circuit. This board does not have a power switch connected to the secondary circuit like the Stylus Color series. Thus, if the printer is turned off, it cannot continue to operate in order to perform the head capping operation.

Q1 (FET)

C11

Power SW

Trans (T1)

Figure 1-9. C160 PSB/PSE Board Component Layout

1.5.3 Interface Board (C160 I/F Board)

Filter (L1)

CN2

Photo Coupler (PC1) Photo Coupler (PC2)

Fuse (F1)

CN1

Choke Cil (C1)

There is an exclusive interface board to receive/transmit print data between the host computer and printer.

Figure 1-10. C160 I/F Board Component Layout

1-20 Rev. A

Upper Case

Eject Paper Stacker

M4C10 Mechanism Space

Waste Ink Drain Tank

Stylus Color IIs / Stylus 820 Product Description

1.5.4 Printer Mechanism (M-4C10)

The M-4C10 printer mechanism is equipped with a replaceable 64-nozzle black printhead and 60-nozzle color (CMY) printhead, and it can print at a high resolution (720 dpi) using the special coated paper.

Figure 1-11. M-4C10 Printer Mechanism

1.5.5 Housing

The Stylus Color IIs housing consists of the printer cover, upper case, and lower case. Attached to the housing are the front paper support and ejected paper support with paper separator.

Figure 1-12. Housing Component Layout

Rev. A 1-21

Chapter 2 Operating Principles

Table of Contents

2.1 OVERVIEW 2-1

2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM 2-1

2.2.1 Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2.2.2 Printing Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

2.2.3 Carriage Drive Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.2.3.1 Platen Gap Adjust Laver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2.2.3.2 Paper Select Lever. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

2.2.4 Paper Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

2.2.5 Ink System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

2.2.6 Pump Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

2.2.7 Cap Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

2.2.8 Wiping Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

2.2.9 Carriage Lock Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

2.3 OPERATING PRINCIPLES OF THE ELECTRICAL CIRCUITS 2-17

2.3.1 Operating Principles of the Power Supply Circuit . . . . . . . . . . . . . . . 2-18

2.3.2 Operating Principles of the Main Control Circuit . . . . . . . . . . . . . . . . 2-20

2.3.2.1 Reset Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

2.3.2.2 Sensor Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

2.3.2.3 Carriage Motor Driver Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

2.3.2.4 Paper Feed Motor Driver Circuit . . . . . . . . . . . . . . . . . . . . . . . 2-25

2.3.2.5 Printhead Driver Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26

Rev. A 2-i

List of Figures

Figure 2-1. Printer Mechanism Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . 2-1

Figure 2-2. Structure of Printhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Figure 2-3. Principles of the Printing Operation . . . . . . . . . . . . . . . . . . . . . . 2-3

Figure 2-4. Dual Firing Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Figure 2-5. 720 dpi Printing for Stylus Color IIs (820) . . . . . . . . . . . . . . . . . . 2-5

Figure 2-6. Carriage Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Figure 2-7. PG Lever Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Figure 2-8. Paper Select Lever. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Figure 2-9. Paper Feed Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Figure 2-10. Ink System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Figure 2-11. Trigger Lever Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Figure 2-12. Pump Transmission Block Diagram . . . . . . . . . . . . . . . . . . . . 2-12

Figure 2-13. Trigger Lever Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Figure 2-14. Gear Transmission Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Figure 2-15. Pump Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Figure 2-16. Capping Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Figure 2-17. Wiping Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Figure 2-18. Carriage Lock Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Figure 2-19. Block Diagram of the Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Figure 2-20. Power Supply Circuit Block Diagram . . . . . . . . . . . . . . . . . . . 2-18

Figure 2-21. Main Control Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . 2-20

Figure 2-22. Reset Circuit Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

Figure 2-23. Sensor Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

Figure 2-24. Carriage Motor Drive Circuit Block Diagram. . . . . . . . . . . . . . 2-24

Figure 2-25. A2910 Internal Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 2-24

Figure 2-26. PF Motor Drive Circuit Block Diagram. . . . . . . . . . . . . . . . . . . 2-25

Figure 2-27. Head Drive Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . 2-26

Figure 2-28. Head Drive Wave-form for Normal Printing. . . . . . . . . . . . . . . 2-26

Figure 2-29. Printhead Electrical Pole Configuration . . . . . . . . . . . . . . . . . 2-27

List of Tables

Table 2-1. Differences Between Stylus Color and Stylus Color IIs

in Micro-Weave Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Table 2-2. Carriage Drive Motor Specifications. . . . . . . . . . . . . . . . . . . . . . . 2-6

Table 2-3. Drive Terms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Table 2-4. Platen Gap Adjust Lever Position. . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Table 2-5. Paper Select Lever Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Table 2-6. Paper Feed Drive Motor Specifications . . . . . . . . . . . . . . . . . . . 2-10

Table 2-7. Drive Terms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Table 2-8. Pump Mechanism Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Table 2-9. DC Voltage Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Table 2-10. Motor Drive Method (Clockwize Direction) . . . . . . . . . . . . . . . 2-23

Table 2-11. Connection Between Input and Output Signals . . . . . . . . . . . 2-23

Table 2-12. Connection Between Current Value and Input Signals . . . . . 2-24

Table 2-13. Motor Drive Method (Clockwize Direction) . . . . . . . . . . . . . . . 2-25

2-ii Rev. A

Rev. A 2-i

Printhead Unit

Platen Drive Mechanism

Paper Pickup Mechanism

Pump Drive Mechanism

Carriage Motor

Paper Feed Motor

Pickup Trigger Lever

Engage Trigger Lever

Stylus Color IIs / Stylus 820 Operating Principles

2.1 OVERVIEW

This section describes the operating principles for the printer mechanism and the circuits of the Stylus Color

IIs.

2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM

The Stylus Color IIs printer mechanism is composed of the printhead unit, paper feed mechanism, carriage

drive mechanism, pump mechanism, and various sensors. The figure below shows a functional block diagram

of the printer mechanism.

Figure 2-1. Printer Mechanism Block Diagram

Rev. A 2-1

Operating Principles Stylus Color IIs / Stylus 820

2.2.1 Printer Mechanism

The printer mechanism for this printer uses a drop-on-demand ink jet system similar to the system used on all other EPSON ink jet printers. However, the printhead in this system has been completely redesigned to make it more compact and ensure a high level of reliability. The figure below shows the structure of the printhead and ink supply system.

o Piezo When a drive pulse (voltage) is applied, this element pushes the vibration plate,

compressing the cavity for ink ejection from the nozzle.

o Cavity Ink supplied from the ink cartridge is stored in this space and is ejected from the nozzles

when the vibration plate compresses this area.

o Nozzles These eject ink against the paper’s surface in response to the application of the

print signal. There are 64 (black head) or 60 (color head) individual nozzles making up the printhead.

Sensor Actuator for Ink Cartridge

Cartridge Needle

Head Drive Board

Ink Filter

Ink Supply Tube

MLP Set Cavity Set Nozzle Plate

Figure 2-2. Structure of Print Head

Head Cover

2-2 Rev. A

Stylus Color IIs / Stylus 820 Operating Principles

Principles of the Printing Operation

The printhead operates in one of two modes to eject ink from each nozzle:

o Normal state

No electrical charge is applied to the MLP (Multi-Layer Piezoelectric) element attached to the back of the cavity, and pressure inside the cavity is kept at a constant level.

o Ejecting state

Nozzle Plate

(Normal State)

Piezo

Cavity

Ink Course

Nozzle

(Ejecting State)

Figure 2-3. Principles of the Printing Operation

The head data signal is applied to the specific nozzle control line to select the active nozzle for printing, and the MLP element is gradually charged by the drive voltage. By charging the MLP element, the vibration plate is bent to compress the cavity. Then, ink is ejected from the nozzle.

When the ink charge or printhead cleaning operation is performed, the ink in the cavity is vacuumed out with

the pump mechanism. During printing, on the other hand, ink is simultaneously supplied from the ink

cartridge and ejected from the nozzle, depending on the change in the volume of the cavity.

A thermistor is attached to the side of each printhead unit to monitor the temperature, because the viscosity of

ink varies, depending on the temperature. The detected temperature level is fed back to the printhead drive

voltage control circuit to change the timing of the Tc pulse.

Rev. A 2-3

Time

0.0435 ug

0.113 ug

Operating Principles Stylus Color IIs / Stylus 820

2.2.2 Printing Operations

Micro Weave Mode The Stylus Color IIs printer has a special printing mode, called “Micro Weave Printing Mode,” which

can be selected from the custom printer driver. Using micro weave printing can improve the output quality, because it eliminates banding that can sometimes occur in normal mode. In micro weave mode, paper feed is performed after each print pass, eliminating pitch variations that cause the banding. The table below shows the differences between the Stylus Color printer and the Stylus Color IIs printer in the micro weave mode.

Table 2-1. Differences Between Stylus Color and Stylus Color IIs

in Micro Weave Mode

Stylus Color Stylus Color IIs

o Using Nozzles

Black Head: Only Row A (# 16 is not available.) Color Head: All Rows (# 16 is not available.)

o Paper Feed Pitch

15/360 inch (in 360 dpi mode) 15/720 inch (in 720 dpi mode)

Normal Mode Normal printing mode is used for the black head at 360 dpi resolution on the custom printer driver.

This mode is specially designed to decrease banding lines when the printer uses black ink (a low-penetrable type).

o Using Nozzles

Black Head: Only Row C and Row D (# 61 and # 64 nozzles not available.) Color Head: All Rows )

o Paper Feed Pitch

20/360 inch (in 360 dpi mode) 20/720 inch (in 720 dpi mode)

Figure 2-4. Dual Firing Method

2-4 Rev. A

1/360"

1/720"

Stylus Color IIs / Stylus 820 Operating Principles

720 dpi Printing Mode

The Stylus Color IIs has a special printing mode, called “720 dpi Printing Mode,” which also can be

selected from the custom printer driver. In this mode, the printer prints dots as follows:

Figure 2-5. 720 dpi Printing for Stylus Color IIs

o Resolution in the horizontal direction: True 360 dpi o Resolution in the vertical direction: 720 dpi, staggered

Rev. A 2-5

Operating Principles Stylus Color IIs / Stylus 820

2.2.3 Carriage Drive Mechanism

The timing belt attached to the base of the carriage unit is driven by the carriage motor, which moves the carriage unit along the carriage guide shaft left to right, or vice versa. The carriage motor for this printer is a 4-phase, 48-pole, hybrid-type stepping motor mechanism, allowing the printer to stop the carriage or change carriage movement in any position. The position of the carriage is recognized by the home position sensor, and position information is fed back to the carriage drive control circuit. This carriage motor is driven by motor driver IC A72919 (See Section 2.3.2.3 for more information).

Table 2-2. Carriage Drive Motor Specifications

Item

Motor Type

Drive Voltage

Coil Resistance

Drive Frequency

Excitation Mode

Carriage Guide Shaft

Description

4-phase / 48-pole hybrid-type stepping motor +42 VDC ± 5%

22.0 Ω±7% 768 ~ 3264 PPS Constant current bi-polar drive, micro-step drive

Carriage Motor

Engage Off Lever

Paper Pickup Trigger

Engage On Lever

Carriage Home Position Sensor

Figure 2-6. Carriage Mechanism

2-6 Rev. A

Stylus Color IIs / Stylus 820 Operating Principles

Table 2-3. Drive Terms

CR Speed (cps)

SPD1 (170) SPD2 (125) SPD3 (20)

SPD41 (20) SPD5 (40) SPD6 (40) SPD7 (40)

Note:

Frequency

(pps)

3264 1W1-2 phase 88 (22) 2400 1W1-2 phase 88 (22)

384 1W1-2 phase 8 (2) 384 1W1-2 phase 8 (2) 768 1W1-2 phase 8 (2) 768 1W1-2 phase 8 (2) 768 1W1-2 phase 8 (2)

In the table above, 1 W1-2 phase means1⁄42-2 phase drive control. Values in parentheses ( ) are for the 2-2 phase.

Phase Drive Method

Acceleration/

Deceleration Step

Rev. A 2-7

0.1

<0> Position

<+> Position

PG Lever

Operating Principles Stylus Color IIs / Stylus 820

2.2.3.1 Platen Gap Adjust Lever

The platen gap adjust lever, which is attached to the left side of the printer mechanism, needs to be set to an appropriate position for the paper type. To change the platen gap (PG), put the printer in the pause state; then change the lever position from the <0> position to the <+> position.

Note:

If print quality is not a problem, you do not need to change the lever position even if the paper thickness is changed.

Table 2-4. Platen Gap Adjust Lever Position

Paper Type Lever Position

< 0 > position < + > position Vertical (+ 0.62 mm)

Horizontal (± 0 mm)

Figure 2-7. PG Lever Operation

2-8 Rev. A

Paper In

Paper Out

Manual Feed

Auto Feed

Hopper

ASF Sensor

PE Sensor

Paper Select Lever

Stylus Color IIs / Stylus 820 Operating Principles

2.2.3.2 Paper Select Lever

The paper select lever, which is attached to the upper case, needs to be set to an appropriate position for paper-feed reliability. Change the paper select lever before transmitting data from the host computer.

Figure 2-8. Paper Select Lever

Note: This operation changes paper pickup speed with the trigger switch on the ASF sensor. q Thinner paper: 1224 pps (Lever position: front)

q Thicker paper: 625 pps (Lever position: rear)

The table below shows the connection between the paper used and the lever position.

Table 2-5. Paper Select Lever Position

Paper Type and Feed Method

Lever

Position

q Thinner paper, manual feed Rear 1224

q Thinner paper, ASF feed Front 1224

q Thicker paper, manual feed Rear 1224

q Thicker paper, ASF feed Rear 625

PF Speed

(PPS)

Rev. A 2-9

Operating Principles Stylus Color IIs / Stylus 820

2.2.4 Paper Feed Mechanism

This printer’s paper feed mechanism can feed paper only from the built-in ASF (auto sheet feeder). The paper feed drive motor is a 2-phase, 96-pole, hybrid-type stepping motor that directly drives the paper feed mechanism (paper advancing operation, paper pickup operation). This motor also drives the pump mechanism, but only when the printer is in the cleaning state. The paper feed drive method is driven by only the 2-2 phase drive method.

Table 2-6. Paper Feed Drive Motor Specification

Item Description

Motor Type 2-phase, 96-pole, hybrid-type Drive Voltage Coil Resistance

+42 VDC ± 5%

21 Ω±1Ω Drive Frequency 500 ~ 1224 PPS Excitation Mode Open loop: 2-2 phase

Table 2-7. Drive Terms

Control Mode

Mode A 500 2-2 phase PF (small steps) Mode B 650 2-2 phase PF (color micro weave) Mode C 1224 2-2 phase PF Mode D 1224 2-2 phase ASF drive Mode E 650 2-2 phase Pump drive Mode F 500 2-2 phase Eliminates backlash

Frequency

(pps)

Drive Method Purpose

Pickup Roller Clutch

Pickup Trigger

Pickup Roller

Platen

Pump / PF Clutch

Push the Hopper Edge

Pickup Trigger

Pump On Trigger

Figure 2-9. Paper Feed Mechanism

2-10 Rev. A

Printhead

Capping Unit

Waste Ink Tube

Pump Roller

Pump On Lever

Pump Off Lever

Platen Roller Unit

PF (Pump) Motor

Ink Cartridge

Stylus Color IIs / Stylus 820 Operating Principles

2.2.5 Ink System

This printer’s ink system is composed of the following mechanisms:

o Ink cartridge o Pump mechanism o Cap mechanism o Waste ink drain tank o Wiping mechanism o Carriage lock mechanism

The figure below gives a diagram of the ink system.

Figure 2-10. Ink System Block Diagram

Rev. A 2-11

Sus Plate

Paper Pickup Trigger

Pump Off Trigger

Pump On Trigger

Sus Plate

Carriage Lever

Operating Principles Stylus Color IIs / Stylus 820

2.2.6 Pump Mechanism

The paper feed motor drives the pump mechanism when the transmission gear is moved to the position where the paper feed motor engages the pump mechanism gear trains, when the carriage unit is at the ink system home position. The figure below shows a block diagram of the pump mechanism.

Drive: Trigger Lever Set

Drive: Gear Transmission

Figure 2-12. Pump Transmission Block Diagram

Figure 2-11. Trigger Lever Set

2-12 Rev. A

Pump Off Trigger

Pump On Trigger

Return the pin to base position

To Pump Off State

Stylus Color IIs / Stylus 820 Operating Principles

Drive: Trigger Lever Reset

Sus Plate

Paper Pickup Trigger

Pump Off Trigger

Sus Plate

Figure 2-13. Trigger Lever Reset

Drive: Gear Transmission

Carriage Lever

Pump On Trigger

Figure 2-14. Gear Transmission Diagram

Rev. A 2-13

No Ink Draining

No Vacuuming

Ink Draining

Vacuuming

Pump Motor (CW): No Pumping

Pump Motor (CCW): Pumping

Operating Principles Stylus Color IIs / Stylus 820

Table 2-8. Pump Mechanism Operation

PF Motor Rotational Direction Operation

Clockwise (CW) Forward rotation

Counterclockwise (CCW) Backward rotation

The pump draws ink from the printhead nozzles and drains it to the waste ink drain tank. The printer performs this operation to eliminate dust or bubbles in the nozzles. Figure 2-11 illustrates pump operation. When the paper feed drive motor rotates CCW (backward), the pulley pumps in the wheel pump unit rotate in the direction of the arrow while squeezing the ink tube to push the ink inside the tube out to the waste ink drain tank.

o Absorption o False absorption o Drive transmission change

o Absorption o False absorption o Cleaner set o Drive transmission change

2-14 Rev. A

Figure 2-15. Pump Operation

Waste Ink Drain Tank

Cap

Air Tube

Air Valve

Hitting Flag

CR Hitting Flag

Stylus Color IIs / Stylus 820 Operating Principles

2.2.7 Cap Mechanism

The cap mechanism prevents printhead nozzles from drying and keeps bubbles from forming inside the nozzles while the printer is not in use. The printer performs this operation automatically when print data is not received. (However, since the power switch is in the primary circuit, it does not allow auto capping when the user turns the printer off during printing.)

Figure 2-16. Capping Operation

2.2.8 Wiping Mechanism

The wiping mechanism cleans the surface of the printhead nose when the printer is in the ink system sequence. The wiper drive lever transmits to the pump drive gear via the cam friction roller. A tension spring in the cam friction roller holds the suface of cam friction roller against the inside of the pump roller.

Lever

Wiper Blade

Internal Flag

Rev. A 2-15

Cam Friction Roller

Figure 2-17. Wiping Mechanism

Carriage Lock Position

Operating Principles Stylus Color IIs / Stylus 820

2.2.9 Carriage Lock Mechanism

The carriage lock mechanism locks the carriage unit when the printer is in the pause state or while it is not used. The Stylus Color IIs does not use an exclusive mechanism as the carriage lock. (The carriage lock position is on the engage / disengage rail as shown in the figure below.)

Figure 2-18. Carriage Lock Mechanism

Note:

For servicing, it is very difficult to move the carriage unit to the carriage lock position manually. Therefore, it is necessary to turn the printer on, set the carriage unit to the lock position, and then turn the printer off.

2-16 Rev. A

PF MOTOR (Pump Motor)

CR Motor

CR HP Sensor

PE Sensor

Thermistor

No Head Sensor

INK END Sensor (Firm Wear)

Head Drive Voltage Select (3-bit ID Code)

Mono./ Color Sensor

Power Drop Sensor

Printhead

100 VAC

Head Drive Board

ASF Sensor

RCC Power Supply Board (C160 PSB Board)

+5 VDC

+42 VDC

Main Control Board (C160 MAIN Board)

+5 VDC

+42 VDC

Stylus Color IIs / Stylus 820 Operating Principles

2.3 OPERATING PRINCIPLES OF THE CIRCUITS

The Stylus Color IIs contains the following circuit board units:

o C160 MAIN Board (main control circuit board) o C160 PSB/PSE Board (power supply circuit board) o C160 I/F (exclusive interface board)

In addition to the circuit boards above, part of the printhead drive circuit is built on a separate circuit board installed in the printhead unit; the printhead unit is attached directly to the carriage unit. The figure below shows a block diagram of the circuitry.

Rev. A 2-17

Figure 2-19. Block Diagram of the Circuits

Operating Principles Stylus Color IIs / Stylus 820

2.3.1 Operating Principles of the Power Supply Circuit

The power supply circuitry for this printer is provided either by the C160 PSB Board (120 VAC) or the C160 PSE Board (220-240 VAC). Both boards are identical in design and functionality, except for components in the primary circuit that accommodate the specified input voltage. The application of output voltages is summarized in the table below.

Table 2-9. DC Voltage Distribution

Voltage Application

+42 VDC

Motor drive (carriage and paper feed / pump) Printhead (through the drive voltage generation circuit)

C160 MAIN Board

+5 VDC

Sensors (home position, paper end, no ink cartridge, head thermistor, etc.) Control panel, head nozzle selector

The figure below shows a block diagram of the power supply circuit (C160 PSB/PSE). As opposed to Stylus Color series printers, the power switch for the Stylus Color IIs is in the primary circuit. Therefore, if the user turns off the printer during printing, the carriage unit stops without capping the nozzles.

Also, this board employs an RCC (ringing choke converter) switching system. This AC voltage is first input to the filter circuit for higher harmonics absorption, and then input to the rectification and smoothing circuit, converting it into a DC voltage. This DC voltage is then input to the switching circuit for the switching operation. Along with the switching operation on the primary side, +42 VDC is generated after passing through the +42 V line voltage-detection circuit. This +42 VDC output level is stabilized and also is input to the +5 VDC generation circuit (chopper IC) to generate a stable +5 VDC.

DB1 C11

Full-wave Rectifier

L1, R1 C1-C4

Filter Circuit

Fuse

Q2, Q3, IC1

Smoothing Circuit

Main SW Circuit

Feedback Circuit

PC1

PC2

Smoothing

Circuit

C51

A N S

Q81, Q82

Photocoupler

+42 V Constant Voltage Control Circuit

+5 V Creation Circuit (IC51)

Over Current Protection Circuit

+42 V Over Voltage Protection Circuit

ZD52, ZD87

+5 V Over Voltage Protection Circuit

ZD53, R81

+42 VDC

+5 VDC

Figure 2-20. Power Supply Circuit Block Diagram

2-18 Rev. A

Stylus Color IIs / Stylus 820 Operating Principles

1. +5 VDC line over voltage protection circuit The output voltage level of +5 V line is monitored by Zener diode ZD53. If the voltage level exceeds +6 V,

the status is fed back to the primary switching circuit through photocoupler PC1 to stop the +42 V generation.

2. +5 VDC line over voltage control circuit. The output current is monitored by a 2-pin detection port in IC51 and fed back to internal comparator; then

the +5 VDC is generated.

3. +42 VDC line over voltage protection circuit The output level is monitored by Zener diodes ZD52 and ZD87. If the voltage level exceeds +48 V,

photocoupler PC2 is activated; stopping primary switching circuit operation.

4. +42 VDC line constant voltage control circuit The output level of +42 VDC line is monitored by a detection circuit that consists of Zener diodes ZD51, 81,

82, 83, 84, 85, and 86. This circuit feeds back the output voltage level status through a photocoupler to the primary switching circuit to control the ON/OFF time of main switching FET Q1 for constant output voltage.

Rev. A 2-19

Operating Principles Stylus Color IIs / Stylus 820

2.3.2 Operating Principles of the Main Control Circuit

The main control circuit for this printer is the C160 MAIN Board, which is controlled by the 16-bit CPU M3772 (IC2), running at 16 MHz. This CPU has a unique architecture capable of handling data on the data bus at either an 8-bit or 16-bit bus width. Because of this, a 16-bit or 8-bit data bus width-type ROM is used on this board, increasing the internal processing speed. Additionally, auto refresh for the 1M PS-RAM is controlled by custom gate array E05B08 ( IC1).

Gate array E05B08 (IC1) manages printhead drive control, the parallel I/F, extension CG board, and the control panel. The gate array also manages the controls that create the 2-bit signal for the carriage or the paper feed motor. (The carriage and paper feed motors are controlled by current duty data with micro step control.) This board also is equipped with EEPROM 93C46 (IC10) to store certain parameters, such as the printer mechanism control parameters, default setting parameters, as well as the the value in the special counter used for printhead (ink management) protection.

Because this control board has no lithium battery that allows the printer to keep track of the amount of time that has elapsed since it was last used, there is no power on cleaning operation for this printer.

EEPROM

Reset IC for Power System

MACH Serial (Only JAPAN ver. )

PROM (4M)

(IC3)

(IC10) 93C46

(IC9)

M51955B

PS-RAM (1M) (IC4)

CE RFRSH

CPU M3772 (IC2)

CG-RAM (16M) (IC5)

OEOEOE

Panel

CG-ROM (8M) (IC6)

E05B08 (IC1)

CG-ROM (16M) (IC7)

(IC13)

PST592D

Reset IC for Logic System

To B

To A

CR/PF Drive Signal

Head Common Driver

and Nozzle Selector

From A

From B

C160 MAIN Control Board

Head Common Driver and Nozzle Selector Circuit

A2919 (IC12, 16)

CR/PF Drive Circuit

Printhead Unit

SED5629 (U1, U2)

IEEE-1284 Centronics

Mono 64 Nozzles

CMY 60 Nozzles

Figure 2-21. Main Control Circuit Block Diagram

2-20 Rev. A

+42 V

+5 V

INT0

CPU (IC2)

+5 V

PST592D (IC13)

E05B08 (IC1)

RESET

153

M51955B

(IC9)

PA8

Stylus Color IIs / Stylus 820 Operating Principles

2.3.2.1 Reset Circuits

The C160 MAIN Board contains 2 reset circuits: the +5 V monitor reset circuit and the +42 V monitor reset circuit. The +5 V monitor reset circuit checks the voltage level of the +5 V line, using reset IC PST592D (IC13), and outputs a reset signal to the E05B08 gate array (IC1) when the voltage level drops below +4.2 V. The +42 V monitor reset circuit checks the voltage level of the +42 V line, using reset IC M51955B (IC9), and outputs a reset signal to the CPU. A reset signal is generated when the voltage level drops below +40 V, and this causes a non-maskable interrupt (NMI).

Figrure 2-22. Reset Circuit Block Diagram

Rev. A 2-21

IC2 (CPU: M3772)

CR HP

CN8 (1-Pin)

CN7 (1-Pin)

CN9 (1-Pin)

ID1 ID2 ID3 ID4

CN4 5-pin

CN4 6-pin

CN4 7-pin

CN4 10-pin

96 95 94 97

M/C

CN4 19-pin

CN4 18-pin

99 98

AN PORT

Common Drive Circuit

Operating Principles Stylus Color IIs / Stylus 820

2.3.2.2 Sensor Circuits

The following sensor circuits enable the C162 MAIN Board to monitor printer mechanism status: HP sensor The photocoupler-type home position (HP) sensor is attached to the surface of the printer

mechanism to detect the carriage home position. A LOW level signal indicates the carriage is in home position.

PE sensor A mechanical switch-type paper end (PE) sensor is built into the printer mechanism to

determine whether there is paper in the printer or not. A LOW level signal indicates no

paper is loaded. CO sensor, The cartridge out (CO) sensor is mechnical switch attached to the head unit. Thermistor A thermistor is attached to the black or CMY printhead unit to monitor its temperature using

the thermistor’s resistance value (at 25° Cor77°F, approximately 10K Ω). The CPU

changes the printhead drive signal’s pulse width (PWM control) based on the temperature

level. M/C sensor The circuit pattern is decided as follows:

q Black head: LOW

q CMY head: HIGH When the printhead is installed in the carriage unit, the control board recognizes the current head automatically.

ID sensor There are four ID ports in the head unit. When the printer is turned on, the control circuit

decodes this ID data and outputs it automatically with the correct voltage. (During servicing, it is not necessary to install a resistor array onto the control board as with previous printers.)

ASF sensor If the user changes the paper select lever to manual feed mode, the ASF sensor monitors this

and changes the paper feed sequence.

Figure 2-23. Sensor Circuit Block Diagram

2-22 Rev. A

Stylus Color IIs / Stylus 820 Operating Principles

2.3.2.3 Carriage Motor Driver Circuit

Carriage motor driver IC A2919 (IC12) outputs a constant current to drive the carriage motor. Gate array E05B08 (IC1) decides the motor phase and speed, and then sends a signal to the carriage motor driver IC using a 2-bit signal transmission line. (In the Stylus Color printer, 4-bit serial data was transmitted from the gate array to the driver IC.)

The carriage motor is controlled using a 1W1-2 phase method. 1W1-2 phase is Stylus Color printer, the carriage motor was controlled using 2W1-2 phase.) The table below shows the motor drive method along with the micro steps.

⁄4the 2-2 phase. (In the

Table 2-10. Motor Drive Method (Clockwise Direction)

Step

^ +1/3 +1

Phase A Phase B

+2/3 +2/3

0+1 –1/3 +1 –2/3 +2/3

–1 +1/3 –1 0

–1 –1/3 –2/3 –2/3 –1/3 –1

0–1 +1/3 –1 +2/3 –2/3

^ ^ ^

Note: One feature of driver IC A2919 is that it can gain constant torque by small movements of the

carriage motor if 1/3 × 1TRIP (TRIP = established current). Therefore, the driver sequence reflects that coefficient in the above table.

Also, the phase drive signal uses only two ports of IC A2919. The table below shows the connection between the input and output signals.

+1 –1/3 +1 0 +1 +1/3

Table 2-11. Connection Between Input and Output Signals

Phase (Input Port) OUT A OUT B

H HL

LLH

Note:

As shown above, two output signals are decided by only one input signal.

Rev. A 2-23

Operating Principles Stylus Color IIs / Stylus 820

The figure below shows a block diagram of the carriage motor, and the Table 2-12 lists the connection between current control value and output current.

VREF2

I12

+5 V

VREF1

I02

IC1 (GA)

IC2 (CPU)

Phase A or /A

Phase B or /B

VREF0 VREF1 VREF2

P56 P57

BPTO0 BPTO1 BPTO2 BPT12

141 142 143

A2919

PHASE2

PHASE1

10 9

8 7 6 5

I11

I01

Figure 2-24. Carriage Motor Driver Circuit Block Diagram

Table 2-12. Connection between Current Value and Input Signal

I01 (I02)

I11 (I12) Output Current

L H L H

L 1 TRIP (100%)

L 2/3 TRIP (67%) H 1/3 TRIP (33%) H 0 (0%)

The micro step method is performed by PWM control in the driver IC, as shown below.

-`

`

A -A

Full Bridge Bi-poler

Phase 1 Phase 2

PWM1 PWM2

I11 I01

Frequency is decided by the external CR circuit.

B -B

Full Bridge Bi-poler

I12

I02

Vref

Output Waveform

Figure 2-25. A2919 Internal Block Diagram

2-24 Rev. A

23 17

RS (Current Monitor)

Stylus Color IIs / Stylus 820 Operating Principles

2.3.2.4 Paper Feed Motor Driver Circuit

The paper feed motor for this printer drives the following mechanisms:

o Paper feed mechanism o Paper pickup mechanism o Pump mechanism

Driver IC A2919 (IC16) drives the paper feed motor by constant current. Its principle of operation is the same as for the carriage motor driver circuit. (However, the drive method is different from the carriage motor’s.) Table 2-13 lists the motor drive method in the CW direction.

Table 2-13. Motor Drive Method (CW Direction)

Step Phase A Phase /A Phase B Phase /B

1 –+–+

Note: The figure below shows a circuit diagram for the paper feed motor and motor driver IC.

+––+

+–+–

–++–

Figure 2-26. PF Motor Driver Circuit Diagram

Rev. A 2-25

Operating Principles Stylus Color IIs / Stylus 820

2.3.2.5 Printhead Driver Circuit

The printhead driver circuit for this printer is composed of the following:

o Common driver circuit (trapezoidal drive pulse generation) o Head driver circuit (nozzle control built on the printhead)

SED5619D, the 64-bit thermal head driver in the head drive circuit on the carriage, is used as a nozzle selector to drive printhead nozzles selectively. Print data is converted into serial data by gate array E05B08 (IC1) and is output from port SO (pin 13) to the black and CMY head driver circuits. Head driver SED5619D latches head data when gate array E05B08 outputs the LATCH signal, and the latched data becomes 64-bit parallel data for the black head or 60-bit parallel data for the CMY head. One bit corresponds to each nozzle.

When data transfer and nozzle selection is complete, gate array E05B08 outputs the common drive pulses (CHG (MCHG) signal, DCHG1 signal, DCHG2 signal, DCHG3 signal) to the common driver circuit. The common driver circuit then generates the trapezoidal pulse and applies it to the printhead as a common drive pulse. Then, the nozzle selected by the head data is activated to eject ink.

Normal Mode

IC1 (GA)

IC2 (CPU)

HCLK LAT SI MCHG CCHG DCHG1 DCHG2 DCHG3 PWM

AN2 M/C

TH ID4 ID3 ID2 ID1 CO

132 139 131 138 137 133 134 135 136

76 99 97 94 95 96 73

Common Driver Circuit

Common

SED5619

64-bit data

Printhead

Figure 2-27. Head Driver Circuit Block Diagram

The normal mode for the Stylus Color IIs operates differently from the normal mode for other Stylus printers. The printer uses normal mode printing only when the user selects 360 dpi printing with the custom printer driver. (Refer to Section 2.2.2. ) The figure below shows the head drive waveform for normal mode.

Note:

If single firing is performed, printer outputs only wave # 1.

A: 1st charge, B: 1st hold, C: 1st discharge D: 2nd hold, E: 2nd discharge F: 3rd discharge, G: pause

Figure 2-28. Head Driver Waveform for Normal Mode

2-26 Rev. A

ID1

GND2 GND CLK

ID2

GND2

GND

IE ID4 CO

COM

M/C

LAT

COM ID3

GND

VDD

Stylus Color IIs / Stylus 820 Operating Principles

The electrical pole configuration on the printhead unit is as follows:

Figure 2-29. Printhead Electrical Pole Configuration

SI Signal: For transmitting 64-bit serial data to the SED5619D LAT: The latch trigger for 64-bit serial data in the driver IC (SED5619D) CLK: The standard trigger for driving serial transmission

Note:

Refer to Section 2.3.2.2 about the other signals.

Rev. A 2-27

Chapter 3 Disassembly and Assembly

Table of Contents

3.1 OVERVIEW 3-1

3.1.1 Precautions for Disassembling the Printer . . . . . . . . . . . . . . . . . . . . . . 3-1

3.2 DISASSEMBLY AND ASSEMBLY 3-2

3.2.1 Upper Case Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

3.2.2 C160 Main Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.2.3 C160 I/F Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

3.2.4 C160 PSB/PSE Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

3.2.5 M-4C10 Printer Mechanism Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

3.2.6 Printer Mechanism Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

3.2.6.1 Carriage Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

3.2.6.2 ASF Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

3.2.6.3 PE Sensor Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

3.2.6.4 Pick Up Roller Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

3.2.6.5 Carriage Home Position Sensor Removal . . . . . . . . . . . . . . . 3-10

3.2.6.6 Paper Feed Roller Unit Removal . . . . . . . . . . . . . . . . . . . . . . . 3-11

3.2.6.7 Carriage Motor Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

3.2.6.8 Head Cleaner Replacement Removal . . . . . . . . . . . . . . . . . . . 3-12

3.2.6.9 Pump Unit Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

3.2.6.10 Paper Feed Motor Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Rev. A 3-i

LIST OF FIGURES

Figure 3-1. Upper Housing Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Figure 3-2. C160 Main Control Board Removal . . . . . . . . . . . . . . . . . . . . . . . 3-3

Figure 3-3. ASF Sensor Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Figure 3-4. FFC Cable Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Figure 3-5.C160 I/F Board Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Figure 3-6. C160 PSB/PSE Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Figure 3-7. Printer Mechanism Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Figure 3-8. PG Lever and Tension Coil Removal . . . . . . . . . . . . . . . . . . . . . . 3-7

Figure 3-9. Parallelism Adjust Lever Removal. . . . . . . . . . . . . . . . . . . . . . . . 3-8

Figure 3-10. Carriage Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Figure 3-11. ASF Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Figure 3-12. PE Sensor Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Figure 3-13. Pick Up Roller Unit Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Figure 3-14. Carriage Home Position Sensor. . . . . . . . . . . . . . . . . . . . . . . . 3-10

Figure 3-15. Paper Feed Roller Unit Removal . . . . . . . . . . . . . . . . . . . . . . . 3-11

Figure 3-16. Carriage Motor Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Figure 3-17. Head Cleaner Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Figure 3-18. Cap Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Figure 3-19. Pump Unit Releasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Figure 3-20. Pump Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Figure 3-21. Paper Feed Motor Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Figure 3-22. Head Data Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

3-ii Rev. A

Stylus Color IIs / Stylus 820 Disassembly and Assembly

3.1 OVERVIEW

This section describes procedures for disassembling the main components of the printer. Unless otherwise specified, disassembled units or components can be reassembled by reversing the disassembly procedure. Therefore, no assembly procedures are included. Precautions for any disassembly or assembly procedure are described under the heading “Disassembly/Assembly Points.” Adjustments required after assembling the unit are described under the heading “Required Adjustments.”

3.1.1 Precautions for Disassembling the Printer

See the precautions below when disassembling the printer.

WARNING

oDisconnect the power cable before disassembling or assembling the printer. oWear goggles to protect your eyes from ink. If ink gets in your eye, flush it with fresh water

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

CAUSION 1

oUse only O9 oil when lubricating the carriage guide shaft.

CAUTION 2

oNever remove the ink cartridge from the carriage unless manual instructions specify to do so. oWhen transporting the printer after installing the ink cartridge, be sure to pack the printer for transportation without removing the ink cartridge.

oUse only recommended tools for disassembling, assembling, or adjusting the printer. oApply lubricants and adhesives as specified. (See Chapter 6.) oMake specified adjustments when you disassemble the printer. (See Chapter 4.)

3.2 DISASSEMBLY AND ASSEMBLY

This section consists of the subheads shown in the diagram below. See the exploded view of the printer in the Appendix, if necessary.

WARNING

Follow the precautions in Section 3.1.1 when disassembling the printer.

This section consists of the subheads shown in the diagram(next page).

Rev. A 3-1

Disassembly and Assembly Stylus Color IIs / Stylus 820

START

Upper Case Removal

3.2.1 Page 3-2

PE Sensor Removal

3.2.6.3 Page 3-9

Pickup Roller Removal

3.2.6.4 Page 3-10

Head Cleaner Replacement

3.2.6.8 Page 3-12

C160 Main Board Removal

3.2.2 Page 3-3

ASF Unit Removal

3.2.6.2

CRHP Sensor Removal

3.2.6.5 Page 3-10

3.2.6.9 Page 3-13

Page 3-9

Pump Unit Removal

C160 I/F Board Removal

3.2.3 Page 3-4

Carriage Unit Removal

3.2.6.1 Page 3-7

Paper Feed Roller Unit Removal

3.2.6.6 Page 3-11

Paper Feed Motor Removal

3.2.6.10 Page 3-14

C160 PS Board Removal

3.2.4 Page 3-5

M-4C10 Mechanism Removal

3.2.5 Page 3-6

3.2.1 Upper Case Removal

1.1.

Remove the sheet guide from main unit. Then remove 2 CBB (M4 × 11) screws securing the upper case to the bottom case.

Open the front cover; then remove 2 CBB (M4 × 11) screws securing the upper case to the bottom case.

3. Remove 1 small screw securing the ASF knob to the lever.

4. Remove the upper case by lifting the front side.

DISASSEMBLY/ASSEMBLY POINT

When you move the carriage unit manually to remove 1 screw(*), push it once toward the right, and move to the left side .

CBB(M4X11)

(*)

CBB(M4X11)

Small Screw

Figure 3-1. Upper Case Removal

3-2 Rev. A

CBB(M3x6)

Shield Plate

CN1

CN8

CN7

CN4

CN3

CN5

CN6

C160 Main Board

CN9

CBB(M3x6)

C160 PSB/PSE Board

ASF Sensor Holder

Stylus Color IIs / Stylus 820 Disassembly and Assembly

3.2.2 C160 MAIN Control Board and ASF Sensor Removal

1. Remove the upper case (see Section 3.2.1).

Remove 4CBB (M3×6) screws attaching the shield frame to the C160 MAIN Board.

3. Remove 7 connectors (CN1, CN8, CN7, CN4, CN3, CN5, CN6) on the main board. (Push CN6 down to release cable on main board.) Then remove the C160 Main Control Board.

4. Remove a CBB (M3x6) screw fixing a ASF Sensor holder to printer mechanism.

CAUTION

When you replace the C160 MAIN Board, reset the EEPROM and perform the required adjustments. (See Chapter 4.)

Figure 3-2. C160 Main Control Board Removal

Figure 3-3. ASF Sensor Removal

Rev. A 3-3

CBB(M3x10)

CPS(M3x10)

Grounding Plate

Disassembly and Assembly Stylus Color IIs / Stylus 820

Remove 3 CPS (M3×6) screws fixing the board frame to the mechanism and 1 CPS (M3x6) screw fixing the metal stay between the board frame and the side(right) frame. Then remove the metal stay.

Remove 2 CPS (M3×6) screws fixing the transpearency plate, then remove it.

7. Release the 3 hooks securing the FFC cable to the board frame then remove the board frame.

Metal stay

Transpearency plate

Figure 3-4. Board Frame and Metal Stay Removal

CPS(M3x6)

Board Frame

3.2.3 C160 I/F Board Removal

1. Remove the upper case (see Section 3.2.1).

Remove 2 CPS (M3×6) screws and 1 CBB (M3×10) securing the C106 I/F Board to the mechanism and bottom case.

3. Disconnect CN1 on this board; then remove it by lifting it up.

Figure 3-5. C160 I/F Board Removal

3-4 Rev. A

CPS(M3x6)

CBB(M3x10)

Big Screw

CBB(M3x10)

C160 PSB/PSE Board

Grounding Plate

Stylus Color IIs / Stylus 820 Disassembly and Assembly

3.2.4 C160 PSB/PSE Board Removal

1. Remove the upper case (see Section 3.2.1).

Remove 1 CBB (M3×10) screw securing the power supply board to the lower case, 1 CPS (M3×6) screw securing the board frame to the grounding plate, 1 CBB (M3x10) screw fixing the board frame and 1 big screw securing the board frame to the lower case via the grounding plate.

Figure 3-6. C160 PSB/PSE Board Removal

Rev. A 3-5

CBB(M3x11)

M-4C10 Printer Mechanism

Disassembly and Assembly Stylus Color IIs / Stylus 820

3.2.5 M-4C10 Printer Mechanism Removal

1. Remove the upper case (see Section 3.2.1).

2. Remove the C160 MAIN Board (see Section 3.2.2).

3. Remove the C160 I/F Board (see Section 3.2.3).

4. Remove the C160 power supply board (see Section 3.2.4).

Remove 4 CBB (M4x11) screws securing the printer mechanism to the lower case.

CAUTION

When you replace the printer mechanism, perform the required adjustments. (See Chapter 4.)

Figure 3-7. Printer Mechanism Removal

3-6 Rev. A

Stylus Color IIs / Stylus 820 Disassembly and Assembly

3.2.6 Printer Mechanism Disassembly

The procedures described in this section explain how to remove components within the printer mechanism.

3.2.6.1 Carriage Unit Removal

1. Remove the printer mechanism (see Section 3.2.6).

2. Remove the blue PG lever.

3. Remove the tension coil securing the parallelism bushing to the side frame.

CAUTION

Use only O9 oil when lubricating the carriage guide shaft.

PG Lever

Tension Spring

Figure 3-8. PG Lever and Tension Coil Removal

Rev. A 3-7

Parallelism Adjust Lever

Lever Knob

Disassembly and Assembly Stylus Color IIs / Stylus 820

4. Remove the parallelism adjust lever by rotating it toward front while pulling the lever knob.

Figure 3-9. Parallelism Adjust Lever Removal

5. Remove the timing belt while pressing the pulley holder; then remove the carriage unit along with the carriage guide shaft.

Pulley Holder

Figure 3-10. Carriage Unit Removal

3-8 Rev. A

ASF Unit

CAUTION

ASF Unit

PE Sensor Actuator

Stylus Color IIs / Stylus 820 Disassembly and Assembly

3.2.6.2 ASF Unit Removal

1. Remove the printer mechanism (see Section 3.2.5).

2. Press down the tab on the left side; then pull the ASF unit toward you.

3. Press the tab on the right side; then remove the ASF unit.

CAUTION

When you remove the ASF, be extremely careful of the PE sensor. Pull the top of the ASF unit toward the front of the mechanism to clear the PE sensor.

Figure 3-11. ASF Unit Removal

3.2.6.3 PE Sensor Removal

1. Remove the printer mechanism (see Section 3.2.5).

2. Remove the ASF unit (see Section 3.2.6.2).

3. Disconnect CN7 on the C160 MAIN Board, then remove the PE sensor.

PE Sensor Actuator

1-Screw

Figure 3-12. PE Sensor Remopval

Rev. A 3-9

Pick Up Roller Unit

Shaft Holder

Washer

Tension Spring

CPS(M3x6)

Carriage Home Position Sensor

Carriage Motor

Disassembly and Assembly Stylus Color IIs / Stylus 820

3.2.6.4 Pickup Roller Unit Removal

1. Remove the printer mechanism (see Section 3.2.5).

2. Remove the ASF unit (see Section 3.2.6.2).

3. Remove the PE sensor (see Section 3.2.6.3).

4. By rotating it, remove 1 shaft holder securing the roller shaft to the frame.

5. Remove the pickup roller unit, referring the following illustration.

Figure 3-13. Pick Up Roller Unit Removal

3.2.6.5 Carriage Home Position Sensor Removal

1. Remove the printer mechanism (see Section 3.2.5).

2. Disconnect the CN8 on the C160 MAIN Board.

Remove the 2 CPS (M3x6) screws securing the metal stay to the printer mechanism.

Figure 3-14. Carriage Home Position Sensor Removal

3-10 Rev. A

Paper Feed Roller Unit

Front Frame

CPS(M3x6)

Stylus Color IIs / Stylus 820 Disassembly and Assembly

3.2.6.6 Paper Feed Roller Unit Removal

1. Remove the printer mechanism (see Section 3.2.5).

2. Remove the carriage unit (see Section 3.2.6.1).

3. Remove the carriage home position sensor (see Section 3.2.6.5).

4. Remove the tension spring holding the tension roller assembly to the sub frame.

Remove 2 CPS (M3x6) screws securing the front frame to the printer mechanism.

6. Remove the paper feed roller unit.

Figure 3-15. Paper Feed Roller Unit Removal

3.2.6.7 Carriage Motor Removal

1. Remove the printer mechanism (see Section 3.2.5).

2. Remove the carriage unit (see Section 3.2.6.1).

3. Remove the carriage (CR) motor.

Note:

When you remove the CR motor, be sure to keep the washer on the CR motor gear.

CAUTION

When you remove or remount the CR motor, be careful of the post at both the top and bottom of the motor. If this post is broken, the motor will not seat correctly and can move during printing.

Carriage Motor

Motor Holder

Figure 3-16. Carriage Motor Removal

Rev. A 3-11

Head Cleaner

Hook

Platen

Disassembly and Assembly Stylus Color IIs / Stylus 820

3.2.6.8 Head Cleaner Replacement

1. Remove the printer mechanism (see Section 3.2.5).

2. Remove the front frame (see Section 3.2.6.6).

3. Use tweezers to unhook the head cleaner.

Figure 3-17. Head Cleaner Replacement

CAUTION

o Never touch the head cleaner with your bare hands. o When attaching the head cleaner, wear gloves and use clean tweezers to handle it.

3-12 Rev. A

White Tube

CPS(M3x6)

Black Holder

CPS(M3x12)

CPS(M3x8)

Hexagonal Screw

Tension Spring

Shift

Push

Stylus Color IIs / Stylus 820 Disassembly and Assembly

3.2.6.9 Cap Unit Removal

1. Remove the printer mechanism (see Section 3.2.5).

2. Remove the front frame (see Section 3.2.6.6).

3. Remove 1 CPS (M3x6) screw securing the cap unit to the lower frame.

Figure 3-18. Pump Unit Removal

4. Remove 1 CPS (M3x6) screw securing the black holder to the frame

5. Remove the white tube connecting the cap unit to the pump unit.(Be careful an ink leak when you remove this ink tube.)

Remove 3 screws — 1 CPS (M3x6), 1 CPS (M3x12), and 1 CPS (M3x8) — securing the pump unit to the main frame.

7. Release a tension spring securing the paper pick up trigger holder to the pump mechanism.

Notes:

1. When you remove the pump unit, be sure to keep the washer, located behind the pump.

2. When you remove the pump unit, do not lose the pin in the pin holder.

Figure 3-19. Pump Unit Releasing

Rev. A 3-13

HOLE

Pin Holder

Pump Unit

Disassembly and Assembly Stylus Color IIs / Stylus 820

Figure 3-20. Pin Position

3.2.6.10 Paper Feed Motor Removal

1. Remove the printer mechanism (see Section 3.2.5).

2. Remove the pump unit. (see Section 3.2.6.9).

Remove the 2 CBB (M3x10) screws securing the paper feed motor to the motor frame.

CBB(M3x10)

PF Motor

CBB(M3x10)

Pump Unit

Figure 3-21. Paper Feed Motor Removal

3-14 Rev. A

Chapter 4 Adjustment

Table of Contents

4.1 OVERVIEW 4-1

4.1.1 Destination Data Writing Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4.1.2 Bi-D (Bidirectional Printing) Alignment Adjustment . . . . . . . . . . . . . . . 4-3

4.1.3 Head Angle Adjustment (Black Head only) . . . . . . . . . . . . . . . . . . . . . . 4-5

4.1.4 Platen Gap Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

4.1.5 EEPROM Reset Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

List of Figures

Figure 4-1. Nozzle Confirmation Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Figure 4-2. Head Angle Pattern (Angle Correct) . . . . . . . . . . . . . . . . . . . . . . . 4-5

Figure 4-3. Head Angle Pattern (Angle Incorrect). . . . . . . . . . . . . . . . . . . . . . 4-5

Figure 4-4. Angle Lever Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Figure 4-5. PG Lever Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Figure 4-6. Confirmation Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

List of Tables

Table 4-1. Required Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Table 4-2. Gap and Adjustment Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Rev. A 4-i

Stylus Color IIs / Stylus 820 Adjustments

4.1 OVERVIEW

This section describes adjustments required when the printer is disassembled and assembled after repair.

WARNING

oAfter removing an ink cartridge, always install a new cartridge immediately. During adjustments and testing, use cartridges designed exclusively for service (Monochrome: 1023206, CMY: 1023207). oOnly adjust the black head angle when you perform the head angle adjustment.

Table 4-1. Required Adjustments

Service Performed Adjustment Needed

When replacing the M-4C10 Printer Mechanism

When replacing C160 MAIN Board

When replacing or disassembling the carriage unit

1. Bi-D Adjustment (see Section 4.1.2).

1. EEPROM Reset Operation (see Section 4.1.5).

2. Destination Data Registration (see Section 4.1.1).

2. Bi-D Alignment Adjustment (see Section 4.1.2).

1. Head Angle Adjustment (see Section 4.1.3).

2. Platen Gap Adjustment (see Section 4.1.4).

Rev. A 4-1

Adjustments Stylus Color IIs / Stylus 820

4.1.1 Destination Data Writing Operation

The setup value that specifies the printer destination (for character generation and panel default settings) is stored in the EEPROM on the C160 MAIN Board. Therefore, this setup value must be written into the EEPROM when the main board or EEPROM chip is replaced.

CAUTION

Before writing the destination data writing, set the interface to parallel.

1. Connect the PC to the target printer using a parallel interface cable and turn the printer on.

2. Execute BASIC on the PC, and run the program HUDSON.BAS. You see the following menu:

Stylus / MJ Program H90E00E ***** Model *****

1. Stylus Color IIs

2. Stylus 820

3. MJ-500C

7. END

3. When the main menu appears, choose the product name by typing 1 or 2 and Enter.

4. You see the following menu.

Stylus / MJ Program H90E00E ***** Customer *****

1. EAI, EAI (Latin America), EAL, ESP, ETT

2. EUL, EDG, EFS, EIS, EIB, EUL (North Europe), EUL (Middle East), EHK

3. [EDG (NLSP)]

4. Russia Slect Menu ?

5. Select your country.

6. If you have completed all your selections, turn off the printer.

Note:

It is not necessary to turn off the printer if you want to perform the other adjustments.

4-2 Rev. A

Stylus Color IIs / Stylus 820 Adjustments

4.1.2 Bi-D (Bidirectional Printing) Alignment Adjustment

Bidirectional alignment is required when the printer mechanism, main board, or printhead (board) is replaced. Performing this adjustment determines a compensation value to rectify any deviation in the print position. This deviation could be caused by the different print speeds, which are due to tolerances in the mechanical components, or to differences in print timing between odd-numbered lines and even-numbered lines in bidirectional printing. The printer stores the compensation data in the EEPROM on the C160 MAIN Board and refers to this data when performing bidirectional printing.

1. Perform steps 1 to 5 in Section 4.1.1. Then you see the following menu:

Stylus Program * H90E00E Model : Stylus Color IIs Customer : EAI, EAI (Latin America), EAL, ESP, ETT

1. Ink discharge (Black)

2. Ink discharge (Color)

3. Head Angle Adjustment

4. Bi-D Adjustment (Bi-d Center -15)

5. A4 check pattern (Black)

6. A4 check pattern (Color)

7. Envelope

8. Index Card / Post Card

0. Change Customer & Model / END

13. BLACK Ink Counter Reset

14. COLOR Ink Counter Reset Select Menu ?

2. Choose “Bi-D Adjustment” by typing 4 and ENTER. You see the following menu:

BLACK head ———- 1 COLOR head ———- 2

Select Menu ?

3. Choose the type of head currently installed on the main unit. The printer prints the Bi-D pattern with the current value. (The next value will automatically appear.) Also, the display will change as shown below:

INPUT ADJUST N0. (IF OK INPUT Y & RETURN) ?

ADJUST RANGE (from -36 to 36)

Note:

You also can find any clogged nozzle by printing the sample pattern below.

1-pin

64-pin

Figue 4-1. Nozzle Configuration Pattern

Rev. A 4-3

Adjustments Stylus Color IIs / Stylus 820

4. If the sample print does not vertically align both odd- and even-numbered lines, enter a compensation

value in the range from −36 to +36. o Positive compensation value: Shifts the 2nd line to the left

o Negative compensation value: Shifts the 2nd line to the right When the sample print becomes vertically aligned for both lines, press Y and ENTER; this returns you

to the main menu.

6. Choose “END” by typing 0 and ENTER. The initial message appears on the display. If you have completed all the adjustments you want to make, turn off the printer.

Note:

It is not necessary to turn off the printer if you want to perform the other adjustments.

4-4 Rev. A

Stylus Color IIs / Stylus 820 Adjustments

4.1.3 Head Gap Adjustment (Black and Color Head)

The head gap adjustment is required when the printer mechanism, main board, or printhead (board) is replaced or diassembled. This adjustment calibrates the head drive timing between the black and color head. If this adjustment is not made, the vertical alignment will not be completed.

Note:

1. Perform steps 1 to 5 in Section 4.1.1. Then you see the following menu:

Use only a black head unit when you perform the head angle adjustment. Also, use only a normal plain paper, because the type of black ink is using the slow penetration type.

Stylus Program * H90E00E Model : Stylus Color IIs Customer : EAI, EAI (Latin America), EAL, ESP, ETT

1. Ink discharge (Black)

2. Ink discharge (Color)

3. Head Angle Adjustment

4. Bi-D Adjustment (Bi-d Center -15)

5. A4 check pattern (Black)

6. A4 check pattern (Color)

7. Envelope

8. Index Card / Post Card

0. Change Customer & Model / END

13. BLACK Ink Counter Reset

14. COLOR Ink Counter Reset Select Menu ?

2. Choose “Head Angle Adjustment” by typing 3 and ENTER. Then the printer prints an angle adjustment check pattern. If the head angle is correct you see the following angle adjustment pattern.

Figure 4-2. Head Angle Pattern (Angle Correct)

3. If the angle adjustment is incorrect, you see a pattern similar to the one below. If this is the case, go to step 4.

Figure 4-3. Head Angle Pattern (Angle Incorrect)

Rev. A 4-5

Angle Lever

Front

Rear

Front

Black

Adjustments Stylus Color IIs / Stylus 820

4. Change the angle lever, referring to the description below.

Figure 4-4. Angle Lever Operation

Note:

You can change the angle lever without removing the upper case.

5. To confirm the head angle, then press the space key to print the modified pattern. If you want to continue adjusting the head angle, press the space key after you change the angle lever. When the head angle becomes correct, press the Y key to return to main menu.

4-6 Rev. A

Front Frame

Carriage Flag

Head

Thickness Gauge

Stylus Color IIs / Stylus 820 Adjustments

4.1.4 Platen Gap Adjustment

This adjustment is required when the carriage unit is removed from the main unit or replaced. Adjust the distance between the printhead nose and the paper surface to 1.18 mm.

1. Remove the upper case, and place a thickness gauge (commercially available) on the paper guide plate at the adjustment position on the left side of the printer , as shown in the figure below:

2. Move the carriage unit manually onto the thickness gauge.

1.18 mm 1.18 mm

Figure 4-5. PG Lever Operation

Table 4-1. Gap and Adjustment Direction

Gap between Head Nose

and Gauge Surface

Too narrow Clockwise (CW) Counterclockwise (CCW)

Too wide Counterclockwise (CCW) Clockwise (CW)

3. Rotate the parallelism adjustment bushing, attached to the left and right ends of the carriage guide shaft until the black or color printhead contacts the thickness gauge.

4. After placing the printheads against the gauge surface, verify the gap between the carriage flag and the front frame. (See Figure 4-6.)

Move

Left Bushing

Move

Right Bushing

Rev. A 4-7

Figure 4-6. Confirmation Method

Adjustments Stylus Color IIs / Stylus 820

4.1.5 EEPROM Reset Procedure

This operation is required when the C160 MAIN Board is replaced, when the waste ink drain pad is replaced, or to recover from printer malfunction. There are two reset methods for this printer. (Reset All and Reset Maintenance Error Only)

Reset All

1. Turn printer power on while pressing the ALT and Load / Eject buttons.

2. Hold down the Load / Eject button for 10 seconds.

Note:

3. Press the Pause button. Then printer starts initialization automatically.

Reset Maintenance Error Only

1. Turn printer power on while pressing the ALT and Load / Eject buttons.

2. Hold down the Load / Eject button for 10 seconds.

Note:

3. Press the Alt button. Then printer starts initialization automatically.

The Pause and Economy LEDs start to blink when printer accepts the reset mode. If the Pause and Economy LEDs do not start to blink, return to step 1.

4-8 Rev. A

Chapter 5 Troubleshooting

Table of Contents

5.1 OVERVIEW 5-1

5.2 Repair the Power Supply Board 5-3

5.3 Repair the C160 Main Board 5-4

5.4 Repair of PRINTER MECHANISM (M-4C10) 5-6

LIST OF FIGURES

Figure 5-1. Troubleshooting Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Figure 5-2. Main Flow-Chart for Recover a Dot-missing . . . . . . . . . . . . . . . . 5-8

Figure 5-3. 360-DPI Check Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

Figure 5-4. Standard of Dot-missing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10

Figure 5-5. The Bent part on the Cap Rubber . . . . . . . . . . . . . . . . . . . . . . . . 5-11

LIST OF TABLES

Table 5-1. Motor Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Table 5-2. Sensor Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Table 5-3. Repair of the C160 PSB/PSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Table 5-4. Repair of the C160 Main. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

Table 5-5. Repair of the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Table 5-6. Ink Cartridge Exclusive for the Service Side. . . . . . . . . . . . . . . . . 5-7

Table 5-7. Repair of the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Rev. A 5-i

Stylus Color IIs / Stylus 820 Troubleshooting

5.1 OVERVIEW

This section describes troubleshooting at the unit level and for abnormal printing(missing-aligned dots). The EPSON Stylus Color IIs/Stylus 820 uses a new print head that is different than the previous Stylus Color print head. Because of its designs, indicating that the cartridge is low or out of ink. If you remove or even partially remove a cartridge unit before it is out of ink, air invades the print head nozzle(s) and the ink cartridge. Once air bubbles clog the nozzle(s), they are very difficult to eliminate. Refer to Section 5.5 to attempt to clear clogged nozzle(s).

Caution

The ink out sensor on the printer is monitoed by the firmweare counter. If you replace an ink cartridge before it ink sensor is activated, you must clear the EEPROM first.

START

Electric Circuit Repair (Section 5.1.1)

Power Supply Board Repair (Section 5.1.1.2)

Control Board Repair (Section 5.1.1.2)

Figure 5-1. Trouble Shooting Construction

M-4C10 Mechanism Repair (Section 5.1.2)

I/C Repair (Section 5.1.3.1)

END

Dot-missing Repair (Section 5.1.3)

Table 5-1. Motor Resistances

Tool Repair (Section 5.1.3.2)

Motor Resistance Range Temperature

CR Motor

PF Motor

22 Ω±7% At 25 °C (77 °F) 21 Ω ± 1 Ω At 25 °C (77 °F)

Rev. A 5-1

Troubleshooting Stylus Color IIs / Stylus 820

Table 5-2. Sensor Status

Sensor Point Signal Level Status

PE Sensor

CO Sensor

M/C Sensor

HP Sensor

ID1 - ID4

ASF Sensor

CN7

Pin 1 (PE) to Pin 2

(GND)

CN4

Pin 3 (CO) to

Pin 8 (GND)

CN4

Pin 19 (M/C) to

Pin 8 (GND)

CN8

Pin 1 (HP) to

Pin 2 (GND)

CN4

Pin10,15,16,17

(ID1,2,3,4)

Pin 2 (GND)

CN9

Pin 1 (ASF) to

Pin 2(GND)

H (5 V) Paper exists L (GND) No paper (paper end) L (GND) Cartridge exists

H (5 V) No cartridge L (GND) Color cartridge exists

H (5 V) Black cartidge exists

L At home position (HP) H Out of HP

4-bit

combination

L Manual feed mode H Auto feed mode

Program ROM desides the proper voltage in the firmwear table. (15-pattern)

5-2 Rev. A

T1 is open. Check T1 coils using the tester. Replace T1.

Q1 is broken. Check the wave-form at the drain of Q1. Replace Q1.

Q2 or Q3 is broken.

Check the wave-form at the drain of Q2 and Q3.

Replace Q2 or Q3.

Check the wave-form at 3-pin of PC1. Replace PC1.PC1 is

broken.

+5V is dead. L4962 is

broken.

Check the oscillation at 5-pin of IC51. Replace IC51.

Check the output wave-form at 7-pin of IC51.

Replace IC51.

Sympton Condition Cause Checkpoints Solution

Printer does not operate at all.

+35V line is dead.

F1 is open. Check the F1. Replace F1.

Table5-3. Repair of the C160 PSB / PSE

Stylus Color IIs / Stylus 820 Troubleshooting

5.2 Unit-Repair - C160 Power Supply Board

This section describes how to repair the C160 power supply board and main board. The table below provides various symptoms, likely causes, and check points. The checkpoints refer to waveforms, resistances, and other values to check to evaluate the operation of each component.

Rev. A 5-3

Phenomenon Condition Cause Checkpoints Solution

It does not operate at all.

CPU does not operate.

Reset circuit does not operate.

Check the wave-form at either pin 1 and 4(GND).

Replace IC13.

Table 5-4. Repair of C160 MAIN

CRU1 or IC2 is defective.

Does wave-form of CRU1 is correct? (at either pin 37 and 38 of CPU)

Correct : replace IC2. Incorrect : replace CRU1.

CRU2 or IC1 is defective.

Does wave-form of CRU2 is correct? (Refer to above wave-form.)

Correct : replace IC1. Incorrect : replace CRU2.

Gate array does not operate.

Check the wave-form at the pin (52,54,56,57,58).

Replace IC1.OE signal does not output.

Gate array does not operate.

Check the wave-form at the pin 3 of QM3.

Does PWM wave-form is correct? (Check the pin at 140.)

Replace IC1.Self-test

printing does not abnormal.

PWM signal does not output.

Common driver circuit does not operate.

Tr does not operate.

Replace a defective element.(QM1,2,3,4, 5,6,7,8 or Q1,7,8.)

Troubleshooting Stylus Color IIs / Stylus 820

5.3 Unit Repair - C160 Main Control Board

This section describes the problems related to the main controller board (C160 MAIN). The table below provides various symptoms, likely causes, and checkpoints. The checkpoints refer to waveforms, resistance, and other values to be checked to evaluate the operation of each component.

5-4 Rev. A

Stylus Color IIs / Stylus 820 Troubleshooting

Table 5-4. Repair of C160 MAIN(Cont.)

SolutionPhenomenon Condition Cause Checkpoints

Carriage does not operate normally.

PF motor does not operate normally.

Drive pulse does not output.

CPU is defective.

IC12 is defective.

CPU is defective.

Does the wave-form correct? (Check pin either at 9 and 10.)

Does the wave-form correct? (Check pin at 17,20 and 14,23.)

Does the wave-form correct? (Check pin either at 3 and 4.)

Replace CPU.

Correct : replace motor. Incorrect : repalce IC12.

Replace CPU.

IC16 is defective.

Does the wave-form correct? (Check pin at 17,20 and 14,23.)

Correct : replace motor. Incorrect : repalce IC12.

Rev. A 5-5

Troubleshooting Stylus Color IIs / Stylus 820

5.4 Repair of PRINTER MECHANISM (M-4C10)

Any problems related to the printer mechanism should be repaired according to the troubleshooting procedures in Table 5-7.

Table 5-5. Repair of the Printer Mechanism

Symptom Condition Cause Checkpoint Solution

The pump mechanism does not operate.

The carriage motor does not rotate.

The PF motor fails to rotate at power on.

Used ink does not go through the used ink tube during the cleaning operation.

The carriage motor fails to rotate at power on.

PF motor is defective.

Carriage flag is defective.

The tube is not properly connected to the cap.

The ink tube is damaged.

The cap is defective.

The pump is defective.

The printhead is defective.

PG value is incoorect.

CRHP sensor is defective.

The carriage motor is defective.

Measure the coil resistance of the CR motor. 21 Ω±1Ω

Check the flag on the back of the carriage unit.

Check that the tube is properly connected to the cap.

Check the ink tube visually. Check for any defective

part. Replace the pump to see if

this causes the ink to be absorbed normally.

Replace the printhead to see if this causes the ink to be absorbed normally.

Check the PG value. (1.18 mm ± 1/100)

Check voltage reaction at pin 1 on CN8.

Measure the coil resistance of the CR motor. 22 Ω±7%

Remove any foreign substance.

Replace the carriage unit.

Insert the tube properly.

Replace the tube.

Replace the head cap.

Replace the pump unit.

Replace the printhead.

Remove any foreign substances.

Replace CRHP.

Replace the carriage motor.

The pulley is

The carriage does not operate normally at power on (after the carriage has been manually centered prior to power on).

5-6 Rev. A

The carriage motor rotates, but the carriage does not move.

The carriage moves slightly and then stops.

defective.

The timing belt is defective.

Carriage movement is not smooth.

Check for broken or worn pulley.

Check that the timing belt is properly inserted into the bottom of the carriage.

Check the timing belt for any damage.

Check whether the carriage moves smoothly when moved manually.

Check tension of the timing belt.

Replace the driven pulley.

Reinsert the timing belt.

Replace the timing belt.

Clean and lubricate the carriage.

Adjust tension of the timing belt.

Stylus Color IIs / Stylus 820 Troubleshooting

5.5 Dot missing Trouble shooting Guide

This section describes how to recover the clogged nozzle when you receive the dot-missing printer. Since the print head of this printer is the new system, it is very difficut to eliminate the invaded air bubble from the print head unit or the ink cartridge so that, never use again if you remove once a ink cartridge from the main unit. Also, we prepair the special ink cartridge exclusive for your service side. Please refer to the under table for low price ink cartridge.

Table 5-6. Ink Cartridge exclusive for the service side

Ink Cartridge Code

Black ink cartridge 1023206 Color Ink cartridge 1023207

Note: Please read throughly under the cautions before you start to repair.

WARNING 1

Do not re-use a removed ink cartridge when you return the printer to your user.

WARNING 2

Since the ink end sensor is counted by the firmwear counter, it is a possibility that the life of brand-new ink cartridge can not be guranteed if you reuse the removed ink cartridge so that, perform the EEPROM reset after replace the ink cartridge.

WARNING 3

There are two reset methods for clear the EEPROM . Select a proper method referring the Section 4.1.5.

Rev. A 5-7

Troubleshooting Stylus Color IIs / Stylus 820

5.5.1 How to recover the dot-missing with the brand-new ink cartridge

The under flow-chart shows the way of the recovering a clogged nozzle with the ink cartridge. The section that is indicated the out of each items shows the additional explanation when you want to help a detail contents.

Start

Refer to Section 5.5.1.1.

Perforn the 360 DPI printing.

Does the printing normal?

Refer to Section 5.5.1.3.

Refer to Section 5.5.1.1.

Perform the CL operation for 2 or 3 times.

Perforn the 360 DPI printing.

Printing is recovered?

Replace to new ink cartridge.

Printing is recovered?

Refer to Section 5.5.1.2.

Yes

Refer to Section 4.1.3.

Refer to Section 4.1.2.

Yes

Printing is recovered?

Refer to Section 5.5.1.4.

Does the head angle correct?

Perform the head angle adjustment.

Perform the Bi-D adjustment.

Refer to Section 5.5.1.5.

Perform the initila ink charge with the program.

Refer to Section 4.1.2.

Perform the Bi-D adjustment.

Perform the EEPROM reset & replace a waste ink drain pad.

Replace to new ink cartridge.

Refer to Section 5.5.1.5. Perform the initila ink charge

with the program.

Refer to Section 4.1.5.

END

Perforn the 360 DPI printing.

Refer to Section 5.5.1.1.

Perforn the 360 DPI printing.

Refer to Section 5.5.1.1.

Perforn the 360 DPI printing.

Refer to Section 5.5.1.4.

Does the head angle correct?

Yes

Printing is recovered?

Yes

Refer to Section 4.1.5.

Perform the EEPROM reset & replace a waste ink drain pad.

Refer to Section 5.5.1.6.

Replace to new print head.

Replace to new ink cartridge.

Refer to Section 4.1.3.

Yes

Perform the head angle adjustment.

Refer to Section 4.1.2.

Perform the Bi-D adjustment.

END

Figure 5-2. Main Flow-Chart for Recover a Dot-missing

5-8 Rev. A

Stylus Color IIs / Stylus 820 Troubleshooting

5.5.1.1 How to Perform the 360-DPI Printing

It is possible to confirm the any problems with the 360-DPI check pattern printing. Also, if you receive the white banding problem, you can confirm the wrong condition quickly. Please perform the proper repir referring under explanations.

[Step 1] Connect the host computer to the printer with the printer cable. [Step 2] Insert the paper to the hopper and load a paper. [Step 3] Run the GWBASIC on the host computer, then execute the program. The file name is

“HUDSON.BAS”.

[Step 4] The initila menu will be appeared on the display.

STYLUS / MJ Program : H90E00E ***** Model *****

1. STYLUS COLOR IIs

2. STYLUS 820

3. MJ-500C

7. END Select Menu ? “_”

[Step 5] Select option 1 or 2 depending on the market. (Never select option 3.) [Step 6] The next menu will be appeared on the display.

STYLUS / MJ Program : H90E00E ***** Customer *****

1. EAI, EAI (Latin America), EAL, ESP, ETT

2. EUL, EDG, EIS, EIB,EUL(North Europe), EUL (Middle EAST), EHK

3. [ EDG(NLSP) ]

4. Russia Select Menu ? “_”

[Step 7] Select your country umber. you can register the CG table and the panel default set at this time.

Then the adjustment menu will be appeared on the display.

STYLUS Program : H90E00E Model : STYLUS COLORIIs(STYLUS 820) Customer : EAI, EAI Latin, ——-, etc.

1. Ink discharge (BLACK)

2. Ink discharge (COLOR)

3. Head Angular Adjustment

4. Bi-D Adjustment (Bi-D center -15)

5. A4 check pattern (BLACK)

6. A4 check pattern (COLOR)

7. Envelop

8. Index card/Post card

0. Change Customer & Model / END

13. BLACK Ink Counter Reset

14. COLOR Ink Counter Reset

Select Menu ? “_”

Rev. A 5-9

Troubleshooting Stylus Color IIs / Stylus 820

[Step 8] Select the option 5 or option 6 depending on your printer head. Then the display indicates the “MC

No. ? ”_"

[Step 9] Press the return key. Then the printer automatically prints a check pattern.

First, the TOF line is printed, then the 360-DPI full duty pattern will be appeared.

2.BETA(With the black head)

3.BETA(With the color head)

Figure 5-3. 360-DPI Check Pattern

Note: Select the correct value on the display because both pattern and color are different depending on

the head units.

[Step 10] We can imagin the miss-alignment or the dot-missing if the above pattern has a white banding or

the smear part, so that advance to next step (Section 5.5.1.2) on the main flow-chart.

5.5.1.2 Standard of “ Does the printing normal?”

If the 360-DPI printing pattern has a under problem, advance to next step (Section 5.5.1.3)

There is a hollow place.

Smear part

There is a projection part.

White banding

Figure 5-4. Standard of Dot-missing

5-10 Rev. A

Stylus Color IIs / Stylus 820 Troubleshooting

5.5.1.3 Performing the CL operation for 2 ~ 3 times

This section describes the cleaning operation if you find a print missing on the 360-DPI check pattern. You need a confirmation either the CL opeartion is correctly performed or not in this function..

[Step 1] Remove the upper case. (See the Section 3.2.1.) [Step 2] Perform the CL operation. (Under the puase state, pressing the Pause button while you pressing

the Alt button.)

[Step 3] Attention the waste ink drain tube either the ink is correctly supplied or not. If an ink is not

correctly supplied, check the under items before you advance to next step on the main flow-chart.

Note:

Cap rubber surface

Bent part

Sponge

Figure 5-5. The Bent part on the Cap rubber

If you can not find a any problems about the pump unit system or the above contents, there is a possibility that an ink inside the ink cartridge has already emptied in spite of any counter values, so that it is necessary to replace to brand-new ink cartridge when you can not find any problems. Also, if user perform the removing or installing with the same ink cartridge, it will not recover the dot-missing every time you perform the CL operation, because the constructure of the print head is very complexity as compair to previous head system. Therefore, replace to brand-new ink cartridge at this time.

Rev. A 5-11

Troubleshooting Stylus Color IIs / Stylus 820

5.5.1.4 Does the Head angle correct?

This section describes either the head angle condition is correct or not. Refer to Section 4.1.3 in the acrual adjustment.

[Step 1] Perform the head angle adjustment. (Refer to Section 4.1.3.) Note: If the head angle condition is wrong, white or color banding problem will be appeared on the

graphic pattern.

5.5.1.5 Perform the initila ink charge with the program

A clogged nozzle will be recovered with a large quantity of an ink by performing the initial ink charge operation.

[Step 1] Perform the Step 1 to Step 7 in the Section 5.5.1.1. [Step 2] Press either the option 1 or option 2 depending on the print heads, then the next message (“Now

Ink discharge”) appears on the display. Note 1: Select a correct option with referring the current print head unit. Note 2: There is a EEPROM all reset routine in the end of this option, so that, it is necessary to replace the

waste ink drain pad if you perform this initial ink charge operation.

5.5.1.6 Replace to new ink cartridge

It is necessary to replace the print head unit if you can not recover a alogged nozzle by performing the initial ink charge, CL operation and replacing the new ink cartridge. If you replace to new ink cartridge, do not re-use a removed ink cartridge again.

5-12 Rev. A

Chapter 6 Maintenance

Table of Contents

6.1 PREVENTIVE MAINTENANCE 6-1

6.1.1 PrintheadCleaning..........................................6-1

6.1.2 WasteInkDrainTankReplacement............................6-1

6.2 LUBRICATION AND ADHESIVE 6-2

LIST OF FIGURES

Figure6-1.LubricationPointsandAdhesivePoints ...................6-3

LIST OF TABLES

Table6-1.RecommendedLubricants................................6-3

Table6-2.LubricationPoints ......................................6-4

Table6-3.AdhesivePoints........................................6-4

Rev. A 6-i

Stylus Color IIs / Stylus 820 Maintenance

6.1 PREVENTIVE MAINTENANCE

This printer must be lubricated only O9 when you need a lubrication for carriage guide shaft. If you lubricate with another oil, it could permanently damage the print head unit.. Although this printer requires no specific maintenance on a regular basis, recommends that you clean the following thoroughly whenever you get a chance.:

❏ Outer case

Use a soft, clean cloth, dampened with mild detergent, if necessary.

❏ Auto sheet feeder

If the inside of the auto sheet feeder is dirty (dusty), carefully brush away all dust and dirt using a soft brush. If the pickup roller of the sheet feeder is dirty, clean its surface with a soft, clean cloth.

❏ Inside the printer

If you notice any dust or dirt that has accumulated inside the printer when you open the outer case for repair, remove all dust and dirt using a small vacuum cleaner designed for such purposes.

Warning

❏ Use only O9 oil when lubricationg the carriage guide shaft. If you lubricate with another oil, it could permanently damage the print head unit. ❏ Never use paint thinner, trichloroethyylene, or ketone-based solvents for cleaning. These chemicals can damage the components the printer.

❏ Do not use a hard or abrasive brush for cleaning. ❏ Be careful not to damage the components of the printer when using a vacuum cleaner.

6.1.1 Printhead Cleaning

If print quality deteriorates, clean the printhead using the built-in printhead cleaning function. The printer also has an automatic printhead cleaning cycle to ensure proper nozzle operation for ink ejection and to preserve the printhead in the best condition. Because of the automatic cleaning cycle, you need to perform this manual printhead cleaning operation only if print quality declines. Performing the cleaning more often wastes ink.

1. Turn the printer on and press the Pause button to pause the printer. Make sure that the PAUSE LED is on.

2. Hold down the Alt button and press the Load/Eject button to clean the printhead.

When the printer accepts the panel switch operation, the PAUSE LED flashes during the cleaning cycle. When the cleaning completes, the PAUSE LED stops flashing and returns to PAUSE mode.

6.1.2 Waste Ink Drain Tank Replacement

The printer counts the total amount of ink drained to the waste ink tank, and this information is stored in the EEPROM on the main board (Protect counter A) for ink system operation management. If the value of this counter reaches a predetermined value, the printer displays an error (“Waste ink tank overflow,” see Chapter 1, Section 1.4.1, Error Conditions, Table 1-14). When this error is displayed, replace the waste ink drain pad and reset the protect counter.

1. Open the upper case and remove the waste ink drain pad from the compartment in the lower case. Insert fresh ink pad and reassemble the printer.

2. Turn the printer while holding down the Alt and Pause buttons.

3. Then holding dawn the Load/Eject for 10-seconds.

4. If printer accepts the reset mode, the Pause and Economy LED starts to brinks. And if printer can not accept, return to step 1.

5. Under this condition, press the Alt button, then initialize operation will be automatically perforemed. (For detail, refer to Section 4.1.5.)

Rev. A 6-1

Maintenance Stylus Color IIs / Stylus 820

6.1.3 Lubrication and Adhesives

The printer must be lubricated properly when it is disassembled for component replacement, or if mechanical noise exceeds a certain level. EPSON recommends only the lubricants listed in table below for this printer. They have been tested extensively and found to comply with the requirements of this printer mechanism. Figure 6-1 shows the lubrication points.

Warning

❏Use only O9 oil when lubricationg the carriage guide shaft. If you lubricate with another oil, it could permanently damage the print head unit.

Table 6-1. Recommended Lubricants

Type Name Quantity Part No. Availability

Oil

Grease

Adhesive NEJI LOCK #2 (G) 1000 g B730200200 E

Note: E = EPSON Exclusive product (not commercially available)

O-9 TBD TBD E

O-5 40 cc 1010513 E G-20 40 gm B700000001 E G-36 40 gm B703600001 E

Table 6-2. Lubrication Points

Ref. No. Lubrication Point Name/Quantity

(1) Oil pad on the carriage G-9 (1-3 mg) (2) Pick up roller hole on the Pump unit G-36 (1-3 mg) (3) Bothsidesoftheplatenunit G-36(1-3mg) (4) Pump transmission gear (Black color) G-36 (1-3 mg) (5) Clutch mechanism (Between PF and pump) G-36 (1-3 mg) (6) Left shaft on the paper feed roller unit G-36 (1-3 mg) (7) E-ring on the paper feed roller unit (Right side) G-36 (1-3 mg) (8) Pump transmission gear surface G-36 (1-3 mg) (9) Rail surface on the paper select lever G-36 (1-3 mg)

Table 6-2. Adhesive Points

Ref. No. Adhesive Point Name/Quantity

(1) A part of timing belt securing on the carraige unit #2 (G) (1-3 mg)

CAUTION

❏Do not apply too much lubricant, as it may stain the printer or cause a malfunction of

the mechanism.

6-2 Rev. A

Epson stylus iis 820 schematic

Specifications and Main Features

Frequently Asked Questions

User Manual

PRECAUTIONS

REVISION SHEET

TABLE OF CONTENTS

1.2 SPECIFICATIONS

3.2 DISASSEMBLY AND ASSEMBLY 3-2