Canon MultiPASS C3000 Service Manual

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MultiPASS C3000

SERVICE MANUAL

Canon

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Disclaimer

This electronic version of the MultiPASS C3000 Service Manual was known to be accurate at the time of publication. Every effort has been made to reduce any technical inaccuracies, typographical errors, omissions, etc., in this publication. Canon Computer Systems, Inc. and Canon Inc. are not responsible for any damage resulting from these errors.

This electronic service manual was produced with the consent of Canon Inc. for the purpose of training and personal use only. Other use of the information contained herein is strictly prohibited.

This publication is copyrighted with all rights reserved. Under the copyright laws, this manual may not be copied, reproduced or translated into another language, in whole or in part, without the written consent of Canon Inc.

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Application

This manual has been issued by Canon Inc. for qualified persons to learn technical theory, installation, maintenance, and repair of products. This manual covers all localities where the products are sold. For this reason, there may be information in this manual that does not apply to your locality.

Corrections

This manual may contain technical inaccuracies or typographical errors due to improvements or changes in products. When changes occur in applicable products or in the content of this manual, Canon will release technical information as the need arises. In the event of major changes in the contents of this manual over a long or short period, Canon will issue a new editions of this manual.

The following paragraph does not apply to any countries where such provisions are inconsistent with local law.

Trademarks

The product names and company names described in this manual are the registered trademarks of the individual companies.

This manual is copyrighted with all rights reserved. Under the copyright laws, this manual may not be copied, reproduced or translated into another language, in whole or in part, without the written consent of Canon Inc..

5-1 Hakusan 7-Chome, T oride-city, Ibaraki 302, Japan

DTP System

This manual was produced on an Apple Macintosh®personal computer, final pages were printed on Canon SUPER LASER SHOT B406 PS. All graphics were produced with Aldus FreeHand

All documents and all page layouts were created with QuarkXPress

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I. MEANING OF MARKS

The marks used in this manual have the following meanings.

Mark Meaning

States a precaution to be taken to prevent danger to personnel, damage to the product, or damage to electronic components by discharge of static electricity. for example.

States a precaution to be taken to prevent damage to electronic components by electrostatic discharge.

Informs you of fire-related cautions.

Informs you that the plug must be removed from the power outlet before starting an operation.

Gives useful information to understand descriptions.

Indicates sections to be read to obtain more detailed information.

NOTE

REFERENCE

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II. ABOUT THIS MANUAL

This manual is divided into five parts, and contains information required for servicing the product.

Part 1: Facsimile

This section describes the facsimile function of the respective product.

Part 2: Printer

This section describes the printer function of the respective product.

Each of the above parts is further divided into the following four chapters:

Chapter 1: General Description

This part explains product specifications and the how to service the unit safely. It is very important, so please read it.

Chapter 2: Technical Reference

This part explains the technical theory of the product.

Chapter 3: Maintenance and Service

This part explains how to maintain the products for adjustment and troubleshooting and service operations and service switches.

Chapter 4: Appendix

This part explains the informations of the optional products and user data flow.

• For more details of user operations and user reports, see the separate volume of

USER'S GUIDE

• Procedure for assembly/disassembly and greasing points are not given in this manual. See the illustrations in the separate volume of

PARTS CATALOG

• Detailed description of each SSSW/parameter is not given in this manual except the new SSSWs/parameters added to this model. See

G3 Facsimile Service Data Handbook (supplied separately)

for details

them.

• See the

G3 Facsimile Error Code List (Rev.1, supplied separately)

for details of

the error codes not shown in this manual.

• Detailed description of connector Locations and Signal Descriptions in not given in this manual. See the

Circuit Diagram

for details them.

REFERENCE

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III. REVISION HISTORY

REVISION CONTENT

0 Original

III

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IV. TABLE OF CONTENTS

Part 1: Facsimile

Page

Chapter 1: General Description

1 - 1 1. FEATURES 1 - 1 1.1 Overview 1 - 2 2. SPECIFICATIONS 1 - 2 2.1 General Specification 1 - 2 2.2 Communication Specification 1 - 3 2.3 Scanner Specification 1 - 5 2.4 Printer Specification 1 - 7 2.5 Copy Specification 1 - 8 2.6 Function 1 -11 3. OVERVIEW 1 -11 3.1 External View 1 -14 3.2 Operation Panel 1 -17 3.3 Consumables 1 -17 3.3.1 BJ cartridge and ink cartridge and BJ cartridge container 1 -19 3.3.2 Print media 1 -21 4. DIMENSIONS 1 -22 5. SAFETY & PRECAUTIONS 1 -22 5.1 Personal Hazards 1 -24 5.1.1 Electrical shock 1 -24 5.1.2 High-temperature parts 1 -25 5.1.3 Fire hazards 1 -25 5.1.4 Moving parts 1 -25 5.1.5 Preventing ink stains 1 -26 5.2 General Cautions 1 -26 5.2.1 Unit cautions 1 -31 5.2.2 BJ cartridge cautions 1 -39 5.2.3 Ink cartridge cautions 1 -41 5.3 Servicing Cautions 1 -41 5.3.1 Damage from static charge 1 -41 5.3.2 Scanner unit 1 -42 5.3.3 Print assembly 1 -44 5.3.4 Paper feed section 1 -44 5.3.5 Control boards 1 -45 5.3.6 Opening the upper cover 1 -46 5.4 Data-related precautions 1 -47 5.4.1 Data in the image storage memory (DRAM) 1 -48 5.4.2 Data in the control processing memory (SRAM) 1 -49 5.4.3 Data in the EEPROM 1 -51 5.4.4 SCNT board replacement precautions

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1 -52 5.4.5 Data initialization through service operation 1 -53 5.5 Protective Mechanism 1 -53 5.5.1 Data battery backup function 1 -53 5.5.2 BJ cartridge maintenance features 1 -54 5.5.3 Heat protection mechanism 1 -54 5.5.4 Overcurrent protection 1 -55 5.5.5 Lightning protection 1 -55 5.5.6 Power leakage protection 1 -56 6. QUALIFICATION REQUIRED FOR INSTALLATION WORK

Chapter 2: Technical Reference

2 - 1 1. COMPONENT LAYOUT 2 - 3 2. SCANNER MECHANISM 2 - 8 3. PAPER SUPPLY MECHANISM 2 -13 4. PRINTER SECTION 2 -20 5. BJ CARTRIDGE 2 -20 5.1 Structure 2 -23 5.2 BJ Head Driver Block Diagram 2 -25 5.3 Printing Signal 2 -27 6. ELECTRIC CIRCUIT 2 -27 6.1 Component Block Diagram 2 -28 6.2 Circuit Board Components 2 -31 6.3 Flow of Image Signals 2 -33 7. COMMUNICATION SYSTEM OPERATIONS 2 -33 7.1 FAX/TEL Switching 2 -33 7.1.1 Settings 2 -33 7.1.2 Parameters 2 -34 7.2 Answering Machine Connection 2 -34 7.2.1 Settings 2 -34 7.2.2 Parameters 2 -35 8. NEW FUNCTION

Chapter 3: Maintenance & Service

3 - 1 1. MAINTENANCE LIST 3 - 1 1.1 Consumables 3 - 1 1.2 Cleaning 3 - 2 1.3 Periodic Inspection 3 - 2 1.4 Periodic Replacement Parts 3 - 2 1.5 Adjustment Items 3 - 3 1.6 General Tools 3 - 3 1.7 Special Tools 3 - 4 2. HOW TO CLEAN PARTS 3 - 4 2.1 Main Unit Outer Covers

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3 - 4 2.2 Separation Roller 3 - 4 2.3 Separation Guide 3 - 4 2.4 Glass Window (contact sensor) 3 - 4 2.5 Printer Platen 3 - 6 3. ADJUSTMENT 3 - 6 3.1 Shading Data Adjustment 3 - 7 3.2 Vertical Alignment Correction 3 -10 3.3 Head Gap Adjustment 3 -14 4. TROUBLESHOOTING 3 -14 4.1 Troubleshooting Index 3 -15 4.2 Errors Shown on the Display 3 -15 4.2.1 User error message 3 -19 4.2.2 Error codes 3 -26 4.3 Errors not Shown on the Display 3 -26 4.3.1 General errors 3 -27 4.3.2 Printing problem 3 -29 4.3.3 Scanning problem 3 -31 5. SERVICE SWITCHES 3 -31 5.1 Hardware Switches 3 -31 5.2 Service Data Setting 3 -31 5.2.1 Service data overview 3 -32 5.2.2 Service data registration/setting method 3 -33 5.2.3 Service data setting 3 -40 5.2.4 Explanation of service data 3 -41 5.2.5 New SSSW's/parameters added to this model 3 -43 6. TEST FUNCTIONS 3 -43 6.1 User Test Print Functions 3 -43 6.1.1 Nozzle check 3 -44 6.2 Service Test Functions 3 -44 6.2.1 Test mode overview 3 -45 6.2.2 Test mode flowchart 3 -46 6.2.3 D-RAM tests 3 -46 6.2.4 CS tests 3 -47 6.2.5 PRINT test 3 -49 6.2.6 Modem and NCU tests 3 -52 6.2.7 Faculty tests 3 -57 7. SERVICE REPORT 3 -57 7.1 Report Output Function 3 -57 7.1.1 User report output functions 3 -59 7.1.2 Service report output functions 3 -67 8. WIRING DIAGRAM 3 -67 8.1 Wiring Diagram 3 -68 8.2 Connector Name and Signal Descriptions

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Chapter 4: Appendix

4 - 1 1. INSTALLATION 4 - 1 1.1 Setting Up 4 - 1 1.2 Checking Operations 4 - 2 2. USER DATA FLOW 4 - 2 2.1 USER DATA FLOW (by Operation Panel) 4 - 3 2.2 USER DATA FLOW (by MultiPASS Desktop Manager) 4 - 8 2.3 SPECIAL MODE FLOW (by Operation Panel) 4 -10 4. MAKER CODE

INDEX

VII

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Part 2: Printer

Chapter 1: General Description

1 - 1 1. FEATURES 1 - 2 2. SPECIFICATIONS 1 - 2 2.1 Basic Specifications 1 - 5 2.2 Interface Specifications 1 -10 3. OVERVIEW 1 -10 3.1 Interface Connector 1 -11 3.2 Printer Operation Panel 1 -12 4. SAFETY & PRECAUTIONS 1 -12 4.1 Personal Hazards 1 -12 4.2 General Cautions 1 -12 4.2.1 Connecting the interface cable 1 -12 4.2.2 Data lost when power cord is pulled out 1 -12 4.2.3 Data reset 1 -13 5. RESTRICTIONS

Chapter 2: Technical Reference

2 - 1 1. THEORY OF OPERATIONS 2 - 1 2.1 Outline 2 - 2 2.2 Mechanical Overview 2 - 3 2.3 Data Flow 2 - 4 2.4 Printing 2 - 5 2.5 Circuit Overview 2 - 5 2.5.1 Printer circuit 2 - 7 2.6 720 dpi Printing/Smoothing Feature 2 - 7 2.6.1 Canon extension mode 2 - 7 2.6.2 Emulation mode 2 - 8 2.7 Printing Modes 2 - 8 2.7.1 Printing mode 2 - 8 2.7.2 Photoprint mode 2 -10 2.8 Optimum Printing Direction Control 2 -10 2.9 Ink Smear Control 2 -11 2.10 Bi-Centronics Interface 2 -11 2.10.1Functions 2 -12 2.10.2Structure

Chapter 3: Maintenance & Service

3 - 1 1. MAINTENANCE LIST 3 - 1 2. HOW TO CLEAN PARTS 3 - 1 3. ADJUSTMENT 3 - 2 4. TROUBLESHOOTING 3 - 2 4.1 Errors Shown on the Display

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3 - 2 4.1.1 User error message 3 - 2 4.1.2 Error codes 3 - 3 4.2 Errors not Shown on the Display 3 - 5 5. SERVICE OPERATION FUNCTION 3 - 5 5.1 Report Output Function 3 - 5 5.2 Service Data 3 - 5 5.3 Test Functions 3 - 5 5.3.1 User test functions 3 - 6 5.3.2 Hexadecimal dump list 3 - 7 6. WIRING DIAGRAM 3 - 7 6.1 Wiring Diagram 3 - 7 6.2 Connector Location and Signal Description 3 - 7 6.2.1 SCNT board

Chapter 4: Appendix

4 - 1 1. INSTALLATION 4 - 2 1.1 Choosing a Location for Printer 4 - 3 1.2 Connecting the Printer to the Computer

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V. ILLUSTRATION INDEX

Part 1: Facsimile

Page

Chapter 1: General Description

1 - 4 Figure 1- 1 Scanning Range 1 - 6 Figure 1- 2 Printing Range 1 -11 Figure 1- 3 External View (1) 1 -12 Figure 1- 4 External View (2) 1 -14 Figure 1- 5 Operation Panel (1) 1 -15 Figure 1- 6 Operation Panel (2) 1 -16 Figure 1- 7 Operation Panel (3) 1 -17 Figure 1- 8 Consumables (1) 1 -18 Figure 1- 9 Consumables (2) 1 -19 Figure 1-10 Print Media (1) 1 -20 Figure 1-11 Print Media (2) 1 -21 Figure 1-12 Dimensions 1 -22 Figure 1-13 Personnel Hazards (1) 1 -23 Figure 1-14 Personnel Hazards (2) 1 -37 Figure 1-15 Unpacking the BJ Cartridge 1 -38 Figure 1-16 Ink Path Cartridge 1 -39 Figure 1-17 Removing Cartridge Cap 1 -40 Figure 1-18 Ink Outlet 1 -42 Figure 1-19 Print Assembly Precautions 1 -45 Figure 1-20 Opening the Upper Cover 1 -46 Figure 1-21 Memory IC and Backed up Devices 1 -50 Figure 1-22 Waste Ink Absorber 1 -52 Figure 1-23 All Clear

Chapter 2: Technical Reference

2 - 1 Figure 2- 1 Mechanical Layout 2 - 2 Figure 2- 2 Electrical System Layout 2 - 3 Figure 2- 3 Document Feed Section 2 - 5 Figure 2- 4 Document Separation 2 - 7 Figure 2- 5 Contact Sensor 2 - 8 Figure 2- 6 Paper Feed Section 2 -10 Figure 2- 7 Paper Feed Motor Drive Switching 2 -11 Figure 2- 8 Paper Separation Mechanism 2 -13 Figure 2- 9 Printer Section 2 -15 Figure 2-10 Purge Unit 2 -15 Figure 2-11 Pump Operation State Detection 2 -18 Figure 2-12 Ink Empty Detection 2 -20 Figure 2-13 Nozzle Arrangement 2 -21 Figure 2-14 Black BJ Cartridge Structure

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2 -21 Figure 2-15 Color BJ Cartridge Structure 2 -22 Figure 2-16 Photo BJ Cartridge Structure 2 -24 Figure 2-17 BJ Head Driver Block Diagram (Black BJ Cartridge) 2 -24 Figure 2-18 BJ Head Driver Block Diagram (Color BJ Cartridge) 2 -25 Figure 2-19 Printing Sequence (Black BJ Cartridge/HQ Mode) 2 -26 Figure 2-20 Printing Signals (HQ Mode) 2 -27 Figure 2-21 Block Diagram 2 -31 Figure 2-22 G3 Transmission Image Signal Flow 2 -32 Figure 2-23 G3 Reception Image Signal Flow

Chapter 3: Maintenance & Service

3 - 5 Figure 3- 1 Cleaning Location 3 - 6 Figure 3- 2 Shading Data Adjustment Operation 1 3 - 6 Figure 3- 3 Shading Data Adjustment Operation 2 3 - 7 Figure 3- 4 Printing the Test Pattern 3 - 7 Figure 3- 5 Test Pattern Sample 3 - 8 Figure 3- 6 Correct Test Pattern 3 - 8 Figure 3- 7 Sample Test Pattern with Vertical Misalignment 3 - 9 Figure 3- 8 Vertical Line Misalignment Correction Procedure 3 -10 Figure 3- 9 Headgap 3 -11 Figure 3-10 Adjustment Preparation 3 -12 Figure 3-11 Head Gap Adjustment (1) 3 -13 Figure 3-12 Head Gap Adjustment (2) 3 -19 Figure 3-13 Service Error Code Display 3 -27 Figure 3-14 Paper Feed Motor/Carriage Motor/Document Feed Motor Connector 3 -28 Figure 3-15 Defective Pattern (Sample) 3 -32 Figure 3-16 Service Data Setting Method 3 -33 Figure 3-17 Service Data (page 1) 3 -34 Figure 3-18 Service Data (page 2) 3 -35 Figure 3-19 Service Data (page 3) 3 -37 Figure 3-20 Service Data (page 4) 3 -38 Figure 3-21 Service Data (page 5) 3 -39 Figure 3-22 Service Data (page 6) 3 -40 Figure 3-23 Bit Switch Display 3 -40 Figure 3-24 How to Read Bit Switch Tables 3 -43 Figure 3-25 Nozzle Check Pattern 3 -45 Figure 3-26 Test Mode 3 -46 Figure 3-27 D-RAM Test 3 -47 Figure 3-28 Print Test Pattern Check 3 -48 Figure 3-29 Print Pattern Sample 3 -51 Figure 3-30 CNG and DTMF Signal Reception Tests 3 -53 Figure 3-31 Sensor Tests 3 -55 Figure 3-32 Operation Panel

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3 -58 Figure 3-33 Memory Clear List 3 -60 Figure 3-34 System Data List (page 1 ~ page 4) 3 -61 Figure 3-35 System Data List (page 5 ~ page 6) 3 -62 Figure 3-36 System Dump List (1/2) 3 -64 Figure 3-37 System Dump List (2/2) 3 -65 Figure 3-38 Service Error Tx Report 3 -66 Figure 3-39 Service Error Activity Report (receiving) 3 -67 Figure 3-40 Wiring Diagram

Chapter 4: Appendix

4 - 2 Figure 4- 1 User Menu Settings (1/6) 4 - 3 Figure 4- 2 User Menu Settings (2/6) 4 - 4 Figure 4- 3 User Menu Settings (3/6) 4 - 5 Figure 4- 4 User Menu Settings (4/6) 4 - 6 Figure 4- 5 User Menu Settings (5/6) 4 - 7 Figure 4- 6 User Menu Settings (6/6) 4 - 8 Figure 4- 7 Special Mode Settings 4 -10 Figure 4- 8 Maker Code

XII

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Part 2: Printer

Page

Chapter 1: General Description

1 - 4 Figure 1- 1 Printing Range 1 - 6 Figure 1- 2 Signal Circuits 1 - 9 Figure 1- 3 Interface Timing 1 -10 Figure 1- 4 Interface Connector

Chapter 2: Technical Reference

2 - 1 Figure 2- 1 Printer Outline 2 - 3 Figure 2- 2 Data Flow (image) 2 - 4 Figure 2- 3 Character Printing 2 - 5 Figure 2- 4 Printer Circuit Block Diagram 2 - 7 Figure 2- 5 720 dpi Printing/Smoothing Feature 2 -13 Figure 2- 6 Nibble Mode Facsimile to Host Data Transfer 2 - 9 Table 2- 1 Printing Modes and Heating Method

Chapter 3: Maintenance & Service

3 - 6 Figure 3- 1 Hexadecimal Dump Print (Sample) 3 - 7 Figure 3- 3 SCNT Board

Chapter 4: Appendix

4 - 2 Figure 4- 1 Location for the Printer 4 - 3 Figure 4- 2 Connecting the Interface Cable

XIII

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MultiPASS C3000

Service Manual

Part 1: Facsimile

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1. FEATURES

1.1 Overview

This product is a G3 transreceiving facsimile based on the ITU-T recommendation. It can be used in telephone networks. *: This mark indicates new function.

Excellent print quality

The high-performance print head offers 360 × 360 dot per inch (dpi) resolution for text and graphics.

Automatic switching between fax and voice calls

Fax/telephone switching allows you to receive fax messages and normal phone calls on a single line.

BJ cartridge REFER TO PAGE 2-20.

The BC-20 and BC-21 BJ cartridges provide excellent print quality for crisp, clean-looking documents.

Convenient paper handling

The paper tray holds up to 100 sheets of plain letter, legal, or A4 paper, and the automatic document feeder can hold up to 20 letter-size, A4-size or 10 legal-size pages.

Simple maintenance

The replaceable ink cartridge contains the ink and the print head. When it runs out of ink, simply replace it.

Ink detection function REFER TO PAGE 2-18.

This model has a new ink detection function. After each received page is printed, ink is ejected in front of a photosensor, so that the machine can detect whether there is ink remaining or not.

Chapter 1: General Description

1-1

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2. SPECIFICATIONS

2.1.General Specification

Type Desktop Body colour Art gray Power source 98 ~ 132V AC, 48 ~ 62 Hz, Power consumption standby 6.5W / Max. 47 W (when 100% black copy) Usage environment. 50.0°F ~ 90.5°F (10°C ~ 32.5°C), 20%~85% RH, 532 ~ 760

mmHg (709 ~ 1013 hPa) Horizontal ±3° or less

Operating noise Measured in accordance with ISO standards

Standby :35 dB(A) or less Operating :47dB(A) or less

Dimensions (W ✕ D ✕ H) 15.75" × 14.2" × 7.75" (400 mm × 361 × 197 mm)

(Not including Trays)

Weight 13.23 lbs (6.0 kg) Including trays

2.2 Communication Specification

Applicable lines PSTN (Public Switched Telephone Network)

PBX (Private Branch eXchange)

Applicable Services DRPD Handset None Transmission method Half-duplex Transmission control protocol ITU-T T30 binary protocol/ECM protocol Modulation method

G3 image signals ITU-T V.27ter (2.4k, 4.8k bps)

ITU-T V.29 (7.2k, 9.6k bps) ITU-T V.33 (12k, 14.4k bps) ITU-T V.17 (TC7.2k, TC9.6k, 12k, 14.4k bps)

G3 procedure signals ITU-T V.21 (No.2) (300bps)

(With automatic fallback function)

Coding ITU-T T.4 Coding method (MH, MR)

ITU-T T.6 Coding method (MMR)

Error correction ITU-T T30 (ECM) Canon express protocol (CEP) None

Part 1: Facsimile

1-2

Page 20

Time required for transmission protocol

Pre-message Post-message Post-message

Protocol *

Mode (between pages) (after pages)

Standard/Fine approx.12 sec. approx.4 sec. approx.3.5 sec.

*1 Time from when other facsimile is connected to the line until image transmission begins. *2 Post-message (between pages): Time from after one document has been sent until

transmission of the next document starts if several pages are transmitted.

*3 Post-message (after last pages): Time from after image transmission is completed until

line is switched from facsimile to telephone.

Minimum transmission time 10 msec (MH,MR), 0 msec (MMR) Transmission output level from 0 to -15 dBm Receive input level from -3 to -43 dBm Modem IC R144EFXL

2.3 Scanner Specification

Type Sheets ADF capacity Max. 20 sheets (A4/Letter)

Max. 10 sheets (Legal)

Effective scanning width Letter/Legal 8.42" (214 mm)

A4 8.19" (208 mm)

Scanning method Contact sensor scanning method Scanning line density

Horizontal: 8 dot/mm (203.2 dpi) Vertical: Standard 3.85 line/mm (97.79 dpi)

Fine 7.7 line/mm (195.58 dpi)

Scanning speed Binary (200 dpi) 10 msec./line

Binary (300, 400 dpi) 5 msec./line 256 gray scales (200 dpi) 10 msec./line 256 gray scales (300, 400 dpi) 20 msec./line

Scanner gray scales 8 bit, 256 gray scales TWAIN Yes Image modes Halftone (PHOTO mode) Scanning density adjustment 3 density level (PC assisted) Halftone (fax and copy) 64-gradation error diffusion system (UHQ-6.5) Prescan None

Chapter 1: General Description

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Scanning range

Sheet dimensions (W × L)

Maximum 8.50" × 39.3" (216 mm × 1000 mm) Minimum 3.5" × 2.5" (88.9 mm × 63.5 mm) Thickness

multiple pages: 0.002" ~ 0.005" (0.06 mm ~ 0.13 mm)

40~90 g/m2

Item A4 Letter Legal

➀ Effective scanning width 8.09"~8.18" 8.33"~8.42" 8.33"~8.42"

(205.5~208 mm) (211.5~214 mm) (211.5~214 mm)

➁ Effective scanning length 11.54" 10.84" 13.84"

(290.0~296 mm) (272.4~278.4 mm) (348.6~354.6 mm)

➂ Left margin 0.04" ±0.14" 0.08" ±0.14" 0.08" ±0.14"

(1.0 mm ±3.5 mm) (2.0 mm ±3.5 mm) (2.0 mm ±3.5 mm)

➃ Right margin 0.04" ±0.14" 0.04" ±0.14" 0.04" ±0.14"

(1.0 mm ±3.5 mm) (1.0 mm ±3.5 mm) (1.0 mm ±3.5 mm)

➄ Top margin 0.08" ±0.08" 0.08" ±0.08" 0.08" ±0.08"

(2.0 mm ±2.0 mm) (2.0 mm ±2.0 mm) (2.0 mm ±2.0 mm)

➅ Bottom margin 0.08" ±0.08" 0.08" ±0.08" 0.08" ±0.08"

(2.0 mm ±2.0 mm) (2.0 mm ±2.0 mm) (2.0 mm ±2.0 mm)

Units are inches with mm shown in parentheses.

Document scanning width “A4/LTR” is set in service data #1 SSSW SW06, bit4.

Part 1: Facsimile

1-4

Figure 1-1 Scanning Range

NOTE

Document leading edge

➀

➃➂

SCANNING DROP OUT RANGE

SCANNING RANGE

Document trailing edge

➄

➁

➅

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2.4 Printer Specification

Printing method Bubble-jet ink on-demand BJ Cartridge

Products name BC-20 Black BJ cartridge/BC-21 Color BJ cartridge/BC-22

Photo Color BJ cartridge Product code F45-0561/F45-0571/F45-1141 Print head 128 nozzles/136 nozzles (Y:24, M:24, C:24, Bk:64)/136 nozzles Ink cartridge (Ink tank) None/BCI-21 Color or BCI-21 Black/None Valid period 1 year/half a year (since the seal was opened)/1 year Storage conditions Temperature 32.0°F ~ 95.0°F (0°C ~ 35°C)

Humidity35% ~ 85% RH

Ink Cartridge

Products name BCI-21 Black Ink Cartridge/BCI-21 Color Ink Cartridge Product code F47-0731/F47-0741 Ink contains 9 ml/5 ml each of YMC

Ink detection Yes (Directly detects ink ejection ) Printing speed Approx. 5 pages/minute (in case of character print) Printing resolution 360 dpi × 360 dpi (Normal print)

180 dpi × 180 dpi (Economy print*) *Printing in a checkered pattern without printing vertical and horizontal adjacent dots.

Paper output tray stacking Approx. 50 sheets (when using the recommended paper)

Approx. 20 sheets (when raised output guides)

Paper tray

Paper supply method ASF (Auto Sheet Feeder) Number of paper tray 1tray : Legal/Letter/A4 (Universal ) Paper capacity Max. 0.40" (10 mm) thickness

plain paper (Approx. 100 sheets)

3. OVERVIEW

3.1 External View

For the switches used for servicing, refer to

Chapter 3: 5.1 Hardware Switches on

Page 3-31

Chapter 1: General Description

1-11

Front View

OPERATION PANEL

PRINTER COVER

AUTOMATIC DOCUMENT FEEDER (ADF)

SENDING DOCUMENT SUPPORT

DOCUMENT SUPPORT FOR SCANNED DOCUMENTS

OUTPUT TRA Y EXTENSIONOUTPUT TRA Y

SHEET FEEDER

PAPER GUIDE

PAPER OUTPUT GUIDES

PAPER REST

DOCUMENT GUIDES

Figure 1-3 External View (1)

NOTE

Page 29

Part 1: Facsimile

1-12

Rear View

BI-DIRECTIONAL PARALLEL PORT

MANUAL FEEDER

POWER CONNECTOR

TELEPHONE LINE JACK

EXTENSION PHONE JACK

Figure 1-4 External View (2)

Inside the Printer Cover

P APER THICKNESS LEVER

CARTRIDGE HOLDER

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Chapter 1: General Description

1-13

This page intentionally left blank

Page 31

3.2 Operation Panel

Part 1: Facsimile

1-14

The C3000’s Controls — The Operation Panel

u RECEIVE MODE button

Use this button to select whether the C3000 is set to receive faxes manually (“Manual Mode”), to treat all calls as faxes (“Fax Only Mode”), to use an answering machine to receive all calls (“Ans.Machine Mode”), or to automatically switch between telephone and fax receiving, depending on the type of call (“Fax/Tel Mode”).

v LCD display

This displays messages and prompts during operation, and displays selections, text, numbers, and names when registering information.

w One-Touch Speed Dial/Special Function buttons

Use these for one-touch speed dialing, entering user information, printing documents stored in memory, and cleaning the print head.

x RESOLUTION button

Press this to select the resolution the C3000 will use for the document you want to fax or scan.

1 2

ABC3DEF

4 5

JKLGHI

MNO

7 8

TUVPRS

WXY

OPER

TONE

SYMBOLS

REDIAL/PAUSE RECEIVE MODE RESOLUTION

ALARM

STOP

CODED DIAL

START/COPY

123

456

PRINTER RESET

CARTRIDGEFUNCTION RESUME

W NUMERIC BUTTONS

X REDIAL/PAUSE

at CODED DIAL

u RECEIVE MODE

ak START/COPY

x RESOLUTION

am STOP

an ARROW BUTTONS

ao PRINTER RESET

v LCD DISPLAY

al ALARM

y FUNCTION

U CARTRIDGE

V RESUME

w ONE-TOUCH SPEED DIAL/

SPECIAL FUNCTION BUTTONS

Figure 1-5 Operation Panel (1)

Page 32

Chapter 1: General Description

1-15

Figure 1-6 Operation Panel (2)

y FUNCTION button

Use this to enter user information, to run the C3000’s self-cleaning process, check the nozzles, or to print faxes stored in the C3000’s memory.

U CARTRIDGE button

Press this to release the C3000’s BJ cartridge holder to its center position for installing or replacing the cartridge. (Press again after installing the cartridge to return the cartridge holder back to its home position.)

V RESUME button

Press this when you want to form-feed paper when printing.

W Numeric buttons

Use these buttons to type numbers and names when entering information, and to dial fax/telephone numbers that are not registered for automatic dialing.

X REDIAL/PAUSE button

Press this to redial the last number that was dialed using the number buttons, or to enter pauses between digits when dialing fax numbers.

at CODED DIAL button

Press this button (followed by entering a two-digit code with the number buttons) to dial a fax number that you have registered for coded speed dialing.

ak START/COPY button

Press this to begin sending, receiving, scanning, or other operations, or to select functions when registering information.

al ALARM lamp

This flashes when an error occurs, when the C3000 is out of paper or ink, or when received faxes are stored in memory.

amSTOP button

Press this to cancel sending, receiving, or any other operation.

an Arrow buttons (

<< >>

)

Use these to scroll through menu selections or to move the cursor when registering data.

ao PRINTER RESET button

Press this to reset the C3000 if your PC crashes. This will maintain all the faxes currently in memory. Do not unplug the C3000 to reset the unit or the faxes in memory will be lost.

Page 33

Part 1: Facsimile

1-16

Entering a Name

When entering a name (such as “Unit Name”), each numeric button has a number and a group of uppercase and lowercase letters assigned to it. The chart below shows which number to press for each character.

Button Characters

11 2 ABCabc2 3 DEFdef3 4 GHIghi4 5 JKLjkl5 6 MNOmno6 7 PQRSpqrs7 8 TUVtuv8 9 WXYZwxyz9 00 # -.*#!”,;:^`_=/|’?$@%&+()[]{}<>

Figure 1-7 Operation Panel (3)

Page 34

3.3 Consumables

3.3.1 BJ cartridge and ink cartridge and BJ cartridge container

Chapter 1: General Description

1-17

Choosing the Best Cartridge

Canon offers several BJ print cartridges and ink tanks for use in the C3000. (BJ print cartridges contain the BJ print head and ink, while BJ ink tanks contain only ink.) Use the following descriptions to decide which type of cartridge best suits your particular needs.

To avoid printing problems, use only the BC-21 BJ cartridge for normal printing (or the separately sold BC-20 Black BJ cartridge, if you rarely print color). The BC-22 Photo Color BJ Cartridge (sold separately) is for printing photo-realistic color images. Other cartridges can produce unsatisfactory results. In addition, use only BCI-21 Black and BCI-21 Color ink tanks in the BC-21 Color BJ cartridge.

BC-21 Color BJ Cartridge

The BC-21 incorporates a BJ print head and two replaceable ink tanks (a BCI-21 Black and a BCI-21 Color). Use this cartridge for normal printing.

BCI-21 Black ink tank

Purchase this ink tank from your local Canon dealer as the black ink runs out of the BC-21 Color BJ cartridge.

BCI-21 Color ink tank

Purchase this ink tank from your local Canon dealer as the color ink runs out of the BC-21 Color BJ cartridge.

BC-20 Black BJ Cartridge

This cartridge incorporates a BJ print head and black ink in a single unit. The BC-20 can be used if most of your printing is black, e.g. for receiving faxes, making copies, and monochrome printing. It can print twice as fast as a color cartridge, and at higher resolution.

Ink

Cartridge

BCl-21

Made in Japan

Color

Ink

Cartridge

BCl-21

Made in Japan

Black

Made in Japan

Color BJ

Cartridge

BC-21

Ink

Cartridge

BCl-21

Made in

Japan

Black

Ink

Cartridge

Made in Japan

BCl-21

Color

Figure 1-8 Consumables (1)

Page 35

Part 1: Facsimile

1-18

BC-22 Photo Color BJ Cartridge

Includes the print head and color ink in a single unit. Use this cartridge for printing photo-realistic color images.

The C3000 cannot print incoming faxes or make copies while the BC-22 cartridge is installed. This is an ink-saving feature: because the BC-22 is a single unit (and does not have ink tanks that can be replaced separately), using it to print faxes will use the black ink faster, using up the cartridge while it still has a considerable amount of color ink remaining.

SB-21 BJ Cartridge Container

Use the SB-21 to store an extra BJ cartridge in a convenient location, while keeping it from drying out.

Your C3000 unit comes with a BC-21 Color BJ Cartridge (which incorporates the BCI-21 Black and BCI-21 Color ink tanks) and an additional BCI-21 Black ink tank. When you run out of ink, or if you wish to use any other Canon BJ cartridges mentioned above, you can purchase them from a Canon Official Dealer.

Figure 1-9 Consumables (2)

Page 36

3.3.2 Print media

Chapter 1: General Description

1-19

Plain Media

Plain paper

The C3000 produces letter-quality print on most plain bond paper, including cotton bond and photocopy paper. It can use A4, letter, or legal sizes. The paper must be less than 0.008 inch (0.2 mm) thick, and have a weight of 17–24 lbs (64–90 g/m2).

You can also use paper weighing 24–28 lbs (90–105 g/m2) by manually feeding sheets, one at a time.

Envelopes

The C3000 can print on U.S. Commercial No. 10 (9.5 x 4.1 inches) and European DL (220 x 110 mm) envelopes.

Figure 1-10 Print Media (1)

Canon Media

Canon provides the following media, all specifically developed to extend the printing capability of your C3000. For details or purchase, contact your local authorized Canon dealer.

Canon Bubble Jet Paper LC-301 (water resistant)

This is a water-resistant, letter-size paper specially developed for color printing with Canon Color BJ printers such as the C3000. Images printed on LC-301 paper are bright and vivid, and will not run if liquid is spilled on them. Images printed on this paper stand up to normal office highlighters, unlike images printed on other papers.

Canon High-Resolution Paper HR-101

This paper is designed to produce near-photographic quality print output, with sharp, vivid graphics and photographs. You must use this paper when printing with the BC-22 Photo Color BJ Cartridge. When using HR-101 paper, be sure to print on the whiter side of the sheets, and after printing a pack of this paper, use the cleaning sheet provided with it to clean the printer roller.

Canon Transparencies CF-102

These letter-size overhead transparencies are specially designed for Canon BJ color printers. Use these clear transparencies to produce crisp and professional overhead presentations. Do not use normal transparencies in the C3000, as they do not absorb ink and can cause the ink to run.

Canon Back Print Film BF-102

This unique mylar-based translucent sheet allows you to print highquality letter-size color output — including photographs and graphics — that you can view with a rear illumination device such as with a light box. This gives you sharp, bright, vivid images you can use in meetings, trade shows, and other presentations.

If you are printing from an application outside Windows, your application or printer driver must support mirror image printing in order to use back print film.

Page 37

Part 1: Facsimile

1-20

Canon High-Gloss Film HG-101

This is a high-grade, letter-size gloss film that lets you create sharper and more vivid color output than is possible with coated paper. This film provides the best color print quality for the BC-21 Color BJ cartridge. Use this film for trade show displays or other special presentations, and when printing at 720 x 360 dpi resolution.

Fabric Sheets FS-101

These legal-size, white, cotton fabric sheets are specifically designed for Canon BJ Color printers, and enable you to print your own designs for cross stitch, pillows, holiday stockings, and other craft projects.

T-Shirt Transfers TR-101

This special letter-size sheet allows you to print your own designs and transfer them to any cotton or cotton/poly blend t-shirt, sweatshirt, apron, tote bag, or other fabric item.

Be sure to select Back Print Film Option when printing on the TR-101 TShirt Transfers. See the MultiPASS Desktop Manager for Windows®User’s Guide for instructions.

Figure 1-11 Print Media (2)

Page 38

4. DIMENSIONS

Chapter 1: General Description

1-21

400

618

361198 59

197 84

281

Units : mm

Figure 1-12 Dimensions

Page 39

5. SAFETY & PRECAUTIONS

5.1 Personnel Hazards

Part 1: Facsimile

1-22

SCNT board Page 1-24

Power supply unit (~185˚F) Page 1-24

Litium battery Page 1-25

Electrical Shock and High-Temprature Parts

Fire hazards parts

Telephone line Page 1-24

PCNT board (~173.1˚F) Page 1-24

Carriage motor (~145.2˚F) Page 1-24

Paper feed motor (~132˚F) Page 1-24

Document feed motor (~113˚F) Page1-24

BJ cartridge (~212˚F) (Alminium plate) PAGE 1-24

Figure 1-13 Personnel Hazards (1)

Page 40

Chapter 1: General Description

1-23

Separation roller

Transmission roller

Document eject roller

Document feed roller

Document pinch roller

Document feed motor

Paper eject roller

Paper feed motor

Carriage motor

Carriage belt

Transmission roller

Pickup roller

Lifting plate

Purge unit

Ink absorber

Paper feed roller

Moving parts ☞ Page1-25

Preventing ink stains ☞ Page1-25

Figure 1-14 Personnel Hazards (2)

Page 41

5.1.1 Electrical shock

Electrical shock hazard

•To prevent electrical shock, be sure to disconnect the power cord and modular jack before disassembly.

•Remove grounding wrist straps before servicing this unit while the FAX’s power is on. Otherwise, electrical shock may occur.

Power supply unit

When power is supplied to this unit, 120 VAC will be supplied to the primary side.

Telephone line

If a telephone line is connected to this unit, 48 VDC will be supplied by this line. When a call signal is received, a voltage of 90 VAC Vrms will be supplied.

5.1.2 High-temperature parts

High-temperature warning

To prevent skin burns, disconnect the power cord and let this unit stand for at least 10 minutes to allow hot parts to cool.

How to treat burns

Heat of about 122°F or more causes burns. Also, the longer the contact, the more severe the burn. When treating a burn, the first minute after receiving the burn is the most important. Cool the burn immediately with cold running water. In case of a serious burn, seek medical attention immediately.

The parts which get hot during operation are indicated. For the location of these parts, refer to the figures. (Ambient temperature 95°F (35°C) continuous copy operation)

Document feed motor (approx. ~ 113.9°F (45.5°C)) Paper feed motor (approx. ~ 132°F (55.6°C)) Carriage motor (approx. ~ 145.2°F (62.9°C)) Power supply unit (Max. ~ 185°F (85.2°C)) PCNT board assembly (approx. ~ 173.1°F (78.4°C)) BJ cartridge (max. ~ 212°F (100°C))

Part 1: Facsimile

1-24

NOTE

Page 42

5.1.3 Fire hazards

Do not dispose in fire.

Do not dispose of lithium batteries in fire. Doing so may rupture the battery and expose flammable materials. Follow applicable local regulations when disposing of the the SCNT board assembly’s lithium battery.

Fire hazard

When using IPA or other solvents during servicing, heat or sparks from internal electronic circuits can ignite the solvent. Before using such solvents, be sure to turn off the power source and wait until the high-temperature parts cool. Use the solvent in a well-ventilated area.

5.1.4 Moving parts

Moving parts

To prevent mishaps due to moving or rotating parts during servicing, be sure to disconnect the power cord before disassembly. Since the this unit does not have a sensor on the printer cover, the carriage and rollers will not stop even if the printer cover is opened during a printing operation. If the printer cover must be opened during printing, beware of the moving parts.

Figure 1-14

shows the driving section's location.

5.1.5 Preventing ink stains

Avoid touching the BJ cartridge ink nozzles, ink pad, head cap, head wiper, and ink absorbers. The ink can stain your hands, clothes, etc. Although the ink is water soluble, it is permanent and will permanently stain clothing, etc.

Although the ink is not toxic, it contains an organic solvent (isopropyl alcohol 67-63-0). If the ink enters the eyes accidentally, flush the eyes with running water and see a doctor. If the ink is swallowed accidentally, see a doctor immediately and give the information printed on the BJ cartridge label.

Chapter 1: General Description

1-25

NOTE

Page 43

5.2 General Cautions

5.2.1 Unit cautions

Part 1: Facsimile

1-26

Safety Instructions

Read these safety instructions thoroughly before using your C3000, and keep them handy in case you need to refer to them later.

Except as specifically described in this manual, do not attempt to service the C3000 yourself. Never attempt to disassemble the unit: opening and removing its interior covers will expose you to dangerous voltages and other risks. For all service, contact your local authorized Canon dealer or service center.

❏ Always follow all warnings and instructions marked on the C3000. ❏ Use the C3000 only on a sturdy, stable, level surface. If the C3000

falls, it could be seriously damaged.

❏ Do not use the C3000 near water. If you spill liquid on or into the

unit, unplug it immediately and call your local authorized Canon dealer or service center.

❏ The back and bottom of the C3000 include slots and openings for

ventilation. To keep the C3000 from overheating (which can cause it to operate abnormally and create risk of fire), take care not to block or cover these openings. Do not operate the unit on a bed, sofa, rug, or other similar soft surface, or near a radiator or other heat source. Do not place the C3000 in a closet or cabinet or on shelves unless adequate ventilation is available. See “Choosing a Location for Your C3000” for guidelines on how much space the unit needs for ventilation.

❏ Operate the C3000 only from the type of power source indicated on

the unit’s label. If you are not sure of the type of power available from your wall outlets, contact your local power company.

❏ The C3000 has a three-prong, grounding-type plug (the third pin is a

grounding pin) that fits only into grounding-type outlets. This is a safety feature. If the outlet you intend to use is not the correct type, contact an electrician to replace it: do not use a 3-to-2 adapter, as this defeats the three-pronged plug’s grounding purpose.

❏ Make sure the total amperage used by all devices plugged into the

wall outlet does not exceed the ampere rating of the outlet’s circuit breaker.

IB1-8

Page 44

Chapter 1: General Description

1-27

❏ Do not allow anything to rest on the power cord or place the C3000

where the cord will be walked on. Make sure the cord is not knotted or kinked.

❏ Do not insert objects of any kind into the slots or openings on the

C3000’s cabinet, as they could touch dangerous voltage points or short out parts, and result in fire or electric shock.

❏ Do not allow small objects (such as pins, paper clips, or staples) to

fall into the C3000. If something does fall into it, unplug the unit immediately and call your local authorized Canon dealer or service center.

❏ Always unplug the C3000 before moving or cleaning it. ❏ Whenever you unplug the C3000, wait at least five seconds before

you plug it back in.

❏ Keep the C3000 away from direct sunlight, as this can damage it. If

you have to place it near a window, install heavy curtains or blinds.

❏ Do not expose the C3000 to extreme temperature fluctuations. Install

the unit in a place with temperatures in the range 50°–90.5°F (10°–32.5°C)

❏ Always unplug the C3000 during thunderstorms. ❏ Before you transport the C3000, remove its BJ cartridge. ❏ Always lift the C3000 as shown below. Never lift it by its sheet

feeder or document supports.

IB1-9

Page 45

Part 1: Facsimile

1-28

❏ Unplug the C3000 and contact your local authorized Canon dealer

or service center in any of these situations:

• If the power cord or plug is damaged or frayed.

• If liquid spills into the unit, or if it is otherwise exposed to rain or liquids.

• If you notice smoke or unusual noises or odors coming from it.

• If the C3000 does not operate normally when you follow the operating instructions. Adjust only those controls that are covered by the operating instructions in this manual, or you can damage the unit and require extensive repair work.

• If the C3000 is dropped or its cabinet damaged.

• If the C3000 begins performing poorly, and you cannot correct the problem by using the procedures in Chapter 6, “Troubleshooting.”

❏ FCC rules governing the use of fax equipment require that you

register your fax number, your name or company name, and the date and time in the C3000 before using it. For instructions, see “Entering User Information in the C3000”.

IB1-10

Page 46

Chapter 1: General Description

1-29

IB2-3

Choosing a Location for Your C3000

Before unpacking your C3000, follow these guidelines to choose the best location for it.

Please review the information provided in “Safety Instructions”, to make sure you are installing your C3000 for safe use.

❏ Put the C3000 in a cool, dry, clean, well ventilated place:

• Make sure the area is free from dust.

• Make sure the location is not affected by extreme temperature changes, and always stays between 50° and 90.5°F (10° and

32.5°C).

• Make sure the area’s relative humidity is always between 10% and 90%.

❏ Keep the C3000 away from direct sunlight. ❏ If possible, put the C3000 near an existing telephone outlet, to avoid

the expense of installing a new one.

❏ Place the C3000 near an electrical wall outlet that accepts a three-

prong, grounded plug, and that provides 120-volt AC (60 Hz) power. (This is standard for U.S. outlets; if you have any doubts, contact an electrician to check the power for you.)

❏ Place the C3000 near the PC you will be connecting it to. Make sure

you can reach it easily, as you will be using it as a printer, fax machine, copier, scanner, and telephone.

❏ Do not plug the C3000 into the same circuit as an appliance such as

an air conditioner, electric typewriter, television, or copier. Such devices generate electrical noise that can interfere with your C3000’s ability to send or receive faxes.

❏ Set the C3000 on a flat, stable, vibration-free surface that is strong

enough to carry its weight (about 13 lbs/6.0 kg).

❏ Make sure the location you choose provides enough space around

the C3000 for adequate ventilation, and to allow paper to flow freely into and out of the unit. The figure below shows the minimum space required for the unit.

Page 47

Part 1: Facsimile

1-30

Powering Up

Follow these guidelines when connecting your C3000 to a power source: ❏ The C3000 is intended for use in the U.S. and Canada only and

requires 120 VAC. Do not use it outside the U.S. or Canada.

❏ Plug the C3000 only into a 120-volt AC, 60-Hz, three-prong

grounded outlet.

❏ Use only the power cord that came with the unit. Using a longer

cord or extension cord can cause the C3000 to malfunction.

❏ Unplug the unit only by pulling on the plug itself. Never pull on the

cord.

❏ Do not plug the C3000 into an outlet shared with an appliance such

as an air conditioner, computer, electric typewriter, or copier. These devices generate electrical noise, which can interfere with the C3000’s operation.

❏ Make sure nothing is laying on the power cord, and that the cord

cannot be walked on or tripped over.

❏ Do not overload the electrical outlet. Make sure the total amperage

used by all the machines plugged into the outlet does not exceed the ampere rating of the outlet’s circuit breaker.

IB2-21

Page 48

5.2.2 BJ cartridge cautions

a) General cautions

Chapter 1: General Description

1-31

Guidelines for Using and Maintaining BJ Cartridges

The most important thing you can do to ensure the best possible print quality, as well as extend the life of your C3000, is to take care of the C3000’s BJ cartridges following these guidelines:

❏ Store cartridges at room temperature. ❏ Keep cartridges in their sealed containers until you are ready to use

them.

❏ Install the cartridge immediately after removing its print head cap

and protective tape.

❏ Always use the cartridge within one year of unpacking it. ❏ When changing cartridges, always store the unused cartridge in the

SB-21 BJ cartridge container that comes with the C3000.

❏ Do not remove the cartridge from the C3000 unless necessary.

The ink in the BJ cartridges is difficult to clean up if spilled. To avoid spilling ink, always be sure to follow these precautions when handling the cartridges:

• Do not attempt to disassemble or refill the cartridge.

• Do not shake or drop the cartridge, or tip the print head downward.

• Keep BJ cartridges out of children’s reach.

IB2-23

Page 49

Part 1: Facsimile

1-32

Hold the BJ cartridge by its sides only. Do not touch the print head, the sharp edges around the print head, the silver plate on the bottom of the cartridge, or the silver metal or circuit area on its side.

❏ Make sure the BJ cartridge holder is in its home position (at the right

side of the unit) when you are not using the C3000. If it is not in its home position, press the CARTRIDGE button. Leaving it out of its home position will dry out the print head on the cartridge.

❏ Clean the print head when print quality is no longer satisfactory. See

“Cleaning and Testing the BJ Cartridge Print Head” for instructions. If the print quality does not improve after five consecutive cleanings, replace the ink tank or BJ cartridge.

❏ Do not use a BC-21 Color BJ cartridge with either of its ink tanks

missing. Doing so can cause it to clog.

❏ Do not remove the ink tanks from the BC-21 Color BJ cartridge

unnecessarily, or the ink in them may clog.

❏ Never attempt to refill an empty cartridge.

Ink

Cartridge

BCl-21

ade in

Japan

Black

Ink

Cartridge

BCl-21

ade in

Japan

Color

Made in Japan

Color BJ

Cartridge

BC-21

PRINT HEAD

IB2-24

Page 50

Chapter 1: General Description

1-33

IB7-4

Maintaining BJ Cartridges

One of the most important elements in maintaining your C3000’s excellent print quality is to clean the BJ cartridge’s print head regularly, and to replace the BJ ink cartridges and tanks promptly when needed.

Cleaning and Testing the BJ Cartridge Print Head

The print head in the BJ print cartridge contains nozzles through which ink is propelled onto the paper. To maintain the best possible print quality, these nozzles need to be cleaned from time to time. Your C3000 is equipped with a print head cleaning function that does this.

If your printouts become faint or streaked, or if their quality otherwise decreases, clean the print head as described below.

If your printing is faded, you can often correct the problem by adjusting the print density (contrast) and printing speed. (For instructions, see the MultiPASS Desktop Manager for Windows®User’s Guide.) Try this before cleaning the print head.

Cleaning the print head uses a small amount of ink. Cleaning too often

significantly reduces the amount of ink in the cartridge, so clean only when necessary.

1. Make sure the C3000 is plugged in.

2. Press FUNCTION, then <<.

3. Press <<or >>until CLEANING is displayed.

4. Press START/COPY.

❑ The C3000 beeps once when cleaning is finished, and returns to

Standby mode.

5. Check whether cleaning corrected the problem by printing or

CLEANING

FUNCTION

START/COPY

Page 51

Part 1: Facsimile

1-34

5. Check whether cleaning corrected the problem by printing or copying a document.

6. If necessary, repeat this procedure up to four more times (giving five cleanings in all). If the problem persists after this, install a new BJ cartridge. See “Replacing the BJ Cartridge”.

When to Replace the BJ Cartridge

How frequently you need to replace your C3000’s BJ cartridge or one of its ink tanks depends on how you use your C3000. If you print a good deal of graphics, halftones, or grayscales, you will need to replace the cartridge more often than if you print mainly text. (See pages A-4 and A-5 for details on the life expectancy of BJ cartridges.)

To help ensure the maximum life for your cartridges, always follow the guidelines for cartridge maintenance given in “Guidelines for Using and Maintaining BJ Cartridges”.

In general, you will need to replace the BJ cartridge in the following situations:

❏ If you have been using a BC-21 Color BJ cartridge for over six

months or the BC-20 Black BJ cartridge for over a year.

❏ If your printed output is not crisp and clear or has gaps in the

characters (missing dots), even after you have cleaned the print head five times as described above.

❏ If your color printouts appear to be missing a color, even after you

have cleaned the print head five times as described above.

IB7-5

Page 52

Chapter 1: General Description

1-35

IB7-6

In addition: ❏ If you are using the BC-21 Color BJ cartridge and your output is

blank, one of the ink tanks is probably empty and needs to be replaced. Print the NOZZLE CHECK test pattern to check whether the BJ cartridge needs replacing or not.

❏ If the message CHANGE CARTRIDGE appears in the LCD display,

the BJ cartridge may have run out of ink. This message also appears if the C3000 has to store a fax in its memory because the cartridge is out of ink.

If this message appears, do the following:

1. Press START/COPY to print any faxes in memory.

• If the printout appears normal, you do not need to replace the BJ cartridge. (Sometimes cleaning the print head or reinstalling the cartridge will clear up the problem.)

• If the print is light or shows gaps, go to step 2.

2. If there was no fax in memory, or if the fax’s print was light, blank, or showed gaps, print or copy a document to make sure the problem is not with the machine that sent the fax.

3. If the document is light, blank, or shows gaps, clean the printing area. If this doesn’t work, replace the cartridge.

Although Canon makes numerous BJ cartridges, the BC-21 Color BJ cartridge, the BC-20 Black BJ cartridge, and the BC-22 Color Photo BJ cartridge are designed specifically for Canon’s color BJ printers, and are the only ones Canon recommends.

Also, the BCI-21 Color and BCI-21 Black ink tanks are designed specifically for the BC-21 Color BJ cartridge, and are the only ones Canon recommends for the BC-21.

START/COPY

Page 53

Part 1: Facsimile

1-36

Storing BJ Cartridges

Once a BJ cartridge is unwrapped, its print head must be kept from drying out, or it can clog and fail to work properly. A cartridge installed in the C3000 is protected from drying out by automatically moving to the home position at the right side of the unit and capping itself.

If you remove a partially used BJ cartridge from the C3000, store it in the SB-21 BJ cartridge container that came with your unit.

1. Insert the cartridge in the container with the cartridge’s label facing forward, and the print head down.

2. Close the container lid, and snap it shut.

Ink

Cartridge

BCl-21

Color

Made in Japan

Color Slot

Ink

Cartridge

BCl-21 Black

Made in

Japan

Black Slot

Color BJ Cartridge

BC-21

Made in Japan

IB2-32

Page 54

b) Unpacking the BJ cartridge

Do not open the BJ cartridge packaging unless you are ready to install the new BJ cartridge. Before installing the BJ cartridge, gently remove the orange head cap and the orange protective tape from the nozzles.

Storing an opened BJ cartridge

If the BJ cartridge packaging has been opened and the BJ cartridge is not to be installed immediately, store the cartridge in the SB-21 cartridge container, to prevent the printing head from drying out and clogging. As much as possible, do not open the packaging until the BJ cartridge is to be installed immediately.

Chapter 1: General Description

1-37

Figure 1-15 Unpacking the BJ Cartridge

Color BJ Cartridge

Black BJ Cartridge

Cap Tape

Photo BJ Cartridge

NOTE

Page 55

c) Protecting the ink nozzles

Do not touch or wipe the ink nozzles with tissue paper, etc. Doing so can clog the nozzles. If the head cap and protective tape have been removed and the BJ cartridge is not to be installed immediately, store the cartridge properly to prevent the nozzles from drying out and clogging. Do not disassemble the BJ cartridge. Also, the BJ cartridge contains electronic circuitry. Do not wash it with water.

d) Ink conductivity

The BJ cartridge ink can conduct electricity. If ink has leaked onto any mechanical parts, wipe off with a damp paper towel. If ink has leaked onto the circuit board, use tissue paper and carefully wipe off the ink completely even at the base of the IC chips.

Never turn on the power while ink still remains on the circuit board. Doing so may damage the circuits.

Part 1: Facsimile

1-38

Black BJ Cartridge Color BJ Cartridge

Nozzles

Joint Pipe

Ink Inlet

Joint Pipe

Nozzles

Color Ink Cartridge

Black Ink Cartridge

Photo BJ Cartridge

Nozzles

Figure 1-16 Ink Path Cartridge

Page 56

5.2.3 Ink cartridge cautions

a) General cautions

Refer to

a) General cautions on Page 1-26

b) Unpacking the ink cartridge

Do not open the ink cartridge packaging unless you are ready to install the new ink cartridge. Before installing it in the BJ cartridge, remove the protective cap from the ink inlet.

Chapter 1: General Description

1-39

Figure 1-17 Removing Cartridge Cap

Cap

Page 57

c) Preventing ink clogging

Do not touch the ink cartridge’s ink outlets. Doing so may introduce foreign matter into the printing head’s joint pipes, causing poor ink suction. After removing the cap from the ink cartridge, immediately install the ink cartridge in the printing head to prevent the ink at the nozzles from drying out and clogging. Do not remove the ink cartridge except when it is to be replaced.

If the ink nozzles are clogged or if the ink suction is poor, the printout may have horizontal white stripes. If the cleaning operation does not restore it to normal, replace the BJ cartridge.

Part 1: Facsimile

1-40

Figure 1-18 Ink Outlet

Yellow Ink Outlet

(Contact Section

of the Joint Pipe)

Magenta Ink Outlet

(Contact Section

of the Joint Pipe)

Cyan Ink Outlet

(Contact Section

of the Joint Pipe)

Color Ink Cartridge

Black Ink Cartridge

NOTE

Black Ink Outlet

(Contact Section

of the Joint Pipe)

Page 58

5.3 Servicing Cautions

5.3.1 Damage from static charge

This unit contains contact sensors and printed circuit boards equipped with ROM, RAM, custom chips, etc. These electronic components are susceptible to damage caused by static charge. When disassembling this unit, take care to prevent static charge.

Static electricity

Static charge can damage electronic components or alter their electrical characteristics. Even plastic tools and hands without grounding wrist straps can generate damaging static charge.

The following items are required to prevent static charge:

•A grounded, conductive mat

•Grounding wrist straps

•A cord with alligator clips to ground this unit’s metal chassis

If you do not have any of the above on hand (during on-site servicing), follow the alternate measures below:

•Use a grounding bag to store and transport printed circuit boards and electronic devices.

• Avoid wearing silk or polyester clothing and leather-soled shoes. Wear cotton clothing and rubber-soled shoes instead.

•Avoid servicing this unit in a carpeted room.

• Before servicing this unit, touch this unit’s grounded terminals to discharge any static charge.

•Wear grounding wrist straps and ground this unit’s metal chassis.

•Always handle the circuit boards and devices along their edges. Do not touch the components and terminals with your fingers.

Shock hazard during power on

If servicing must be performed while this unit is turned on, do not wear any grounding wrist straps. This is to prevent electricity from passing through your body.

5.3.2 Scanner unit

a) General Precautions

• Handle contact sensors with care to prevent scratching or smudging of the scanning

surface. Scratches or smudges can cause vertical stripes, etc., to appear on the scanned image.

• Be careful not to scratch the ADF rollers. If the rollers are scratched, paper jams may

result.

Chapter 1: General Description

1-41

Page 59

5.3.3 Print assembly

Part 1: Facsimile

1-42

BJ Cartridge

Carriage

Head Gap

Spurs

Carriage ribbon cable ass'y

Figure 1-19 Print Assembly Precautions

Page 60

a) General precautions

Head gap

The head gap is the distance between the BJ head and the platen. It has been factoryadjusted. If the carriage guide frame fastened to the printer frame is repositioned, the head gap must be adjusted. This may affect the printing quality.

If the printing quality has degraded due to a change in the head gap, see

Chapter 3: 3.3 Head Gap Adjustment on Page 3-10

to adjust the head gap.

Lubrication points

Do not touch the greased parts of the carriage guide frame, carriage shaft, idler roller and some parts. Doing so will wipe off the grease which has been applied for the smooth operation of the printer unit.

Do not apply grease to any unspecified parts and surfaces. If grease is on the purge section’s rubber cap or the wiping assembly’s blade, it may cause the BJ cartridge’s nozzles to clog, rendering the BJ cartridge unusable. Also, do not use any grease other than the specified type. Using a different type of grease may dissolve or deform plastic parts.

If you accidentally touch a greased surface, reapply the grease. See the

PARTS CATALOG

(provided separately).

Spurs

During servicing, be careful not to damage or deform the spur assembly’s spur tips. If the spur tips are deformed, the area of the paper coming into contact after the printing increases, causing vertical black stripes on the paper.

Carriage ribbon cable assembly

Do not pull or bend the carriage ribbon cable more than is necessary. Doing so may disrupt the cable’s continuity and prevent the printing signals to be sent properly to the cartridge.

Power off during printing

During servicing, do not disconnect the power cord during a printing operation or while the cartridge is being replaced. Otherwise, the cartridge will stop at a position where the ink nozzles cannot be protected by the rubber cap. The ink may then dry and clog the nozzles. During servicing, be sure the cartridge is properly positioned for nozzle capping.

Chapter 1: General Description

1-43

REFERENCE

NOTE

Page 61

5.3.4 Paper feed section

a) General precautions

Setting the paper size

For fax operations, the user sets the paper size with the MultiPASS Desktop Manager for Windows. The unit cannot detect the paper size automatically. Therefore, if the paper size is altered during servicing, be sure to set it back to the user’s paper size setting.

If the paper size setting does not match the size of the paper installed. One of the following two operations will be executed: (A) If the paper size setting is the same or smaller than the actual size of

the paper installed, the following will be executed: The document will be printed to fit the length of the paper size that has been set. Even if the paper size setting is smaller than the actual paper size, printing will be executed and no error will result. Depending on the document, large blank areas may result on the printout.

(B) If the paper size setting is larger than the actual paper size, the

following will be executed: As with (A), the document will be printed to fit the length of the paper size that has been set. Since the actual paper size is shorter than the paper size setting, the document's contents would be broken up to fit the paper size setting. "CHECK PAPER" will therefore be displayed and printing will be canceled.

5.3.5 Control boards

a) Hardware switch and adjustable volume

•The SCNT board’s volume resistor VR1 has been factory-adjusted. Service personnel are not to alter its setting.

• The power supply unit’s adjustable volume VR101 has been factory-adjusted. Service personnel are not to alter its setting.

Regarding the hardware switch for servicing, refer to

Chapter 3: 5.1

Hardware Switches on Page 3-31

b) Replacing the SCNT board

The SCNT board stores the user data, service data, and other data. Therefore, when replacing the SCNT board, print out the stored data and then enter this data into the new SCNT board.

The SCNT board replacement precaution is described in

“5.4.4 SCNT board

replacement precautions” on Page 1-51

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1-44

REFERENCE

Page 62

The PCNT board stores the absorption amount of waste ink absorber and vertical alignment data. Therefore, when replacing the PCNT board, print out the absorption amount data and then enter this data into the new PCNT board, and then adjust vertical alignment.

5.3.6 Opening the upper cover

How to open the upper cover

Unless the correct procedure is followed when removing the upper cover , the outer covers may be damaged, and the plastic claws may be broken. Be sure to use the correct tools for the job. If any of the outer covers are damaged during the work, they must be replaced with new ones.

To remove the upper cover, prise loose the four tabs, using the tip of the recommended tool. When loosing these tabs, be careful of the following points.

•Use a tool whose diameter is less than that of the holes. (hole: 3mm ✕ 1.5mm) Using larger diameter tools may damage the surface around the holes.

•Be careful not to cause any damage around the holes.

•Do not insert the tool any further than 8mm, otherwise the claws may be damaged.

•When loosing the claws, press down on the upper cover, insert the tool, and when the claw

is loose, raise the upper cover. The tabs will be difficult to remove if the cover is lifted up first.

The cover opener (round-tip screwdriver) has been set as a special tool, but any precision screwdriver with a tip diameter of 1.5 mm or less would do instead. If using a substitute, be careful not to scratch any surfaces.

Chapter 1: General Description

1-45

Cover opener (HY9-0021)

UPPER COVER

Figure 1-20 Opening the upper cover

NOTE

Page 63

5.4 Data-related precautions

The memory IC on the circuit board stores the user’s registration data and values for various counters, etc., required for servicing. Although this data is normally retained in memory, it can be deleted by mistake. When handling this data during servicing, note the following precautions.

PC registration function

Using the MultiPASS Desktop Manager that comes with this product, the user setting items stored in the SRAM can be reprogrammed. The contents of these items are stored as necessary in the settings files in the PC, and at the same time are rewritten into the user setting items in the SRAM, via bicentronics interface. This function means that, when replacing the lithium battery, or performing repairs that normally entail the loss of data, if the user's PC contains valid settings files, there is no need to reenter user managed data. Refer to the MultiPASS Desktop Manager User's Guide for details of this function. However, please note that service data are not saved.

Part 1: Facsimile

1-46

Lithium battery

SCNT board

SRAM

(IC302)

PCNT board

EEPROM

(IC8)

Figure 1-21 Memory IC and Backed up Devices

NOTE

Page 64

5.4.1 Data in the image storage memory (DRAM)

DRAM stores image data which was read other than by a direct transmission. It also acts as a buffer memory to store the image data received. If power is turned off, the memory clear list is printed automatically the next time the power is turned on. The user is thereby notified of the images that were erased from memory.

Reception image data

This product is not equipped with image data backup, so that if the power supply is cut, data in memory reception will be lost. When image data are set to be printed, they will be stored in the DRAM as memory reception images, and "REC'D IN MEMORY" will be displayed. This product does not have a memory reception image transfer capability. If printing is disabled due to a fault in the printing section, check the Memory Clear List, after turning off the power to repair the fault, and request the other party to retransmit the message.

If the setting is for the received image data to be transferred to PC, instead of being printed, the data will be saved as a file in the DRAM, and "RECEIVED IN FILE" will be displayed. To print the contents from the main unit only, select FILE PRINT with the numeric keys. If printing is disabled due to a fault in the printing section, connect to the PC, and start up MultiPASS Desktop Manager. The file will be exported to the PC, and the contents can be verified on the PC display and saved.

Chapter 1: General Description

1-47

NOTE

Page 65

5.4.2 Data in the control processing memory (SRAM)

SRAM is backed up by a lithium battery. It can retain the stored data for 5 years after the power is turned off. SRAM stores the following data: All the data the user entered with the menu system, the activity reports and other report-generating data, the redial data containing the redial destinations set with the Redial key, the servicing data set by repair personnel with the service soft switch, and the factory-entered shading correction data for contact sensor reading correction. SRAM stores almost all of the data which can be entered or set. These stored data can be checked with various reports.

Jumper plug precautions

The control/image processing memory is backed up by shorting the jumper pin (JP13) on the SCNT board with the jumper plug. If the the jumper plug is removed and the power is turned off, the data in SRAM will be lost. Before removing the jumper plug, be sure to print out the data stored in the SRAM.

Lithium battery life

The lithium battery can last for over 5 years after the power is turned off. When the power is on, the lithium battery’s power is untapped. Therefore, the actual battery life can be much longer. When the lithium battery becomes exhausted, "DATA ERROR" will be displayed after the power is turned off or on. When this happens, replace the lithium battery. Since the data in SRAM will be lost when the battery is replaced, it cannot be printed out. After the lithium battery is replaced and the power is turned on, "DATA ERROR" will be displayed. Press the START/COPY key to discard the contents in SRAM and initialize it to the factory defaults. These messages indicates that the shading correction data for contact sensor reading correction has been lost. Refer to

Chapter 3: 3.1 Shading

Data Adjustment on Page 3-6

to re-enter the shading data.

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NOTE

Page 66

5.4.3 Data in the EEPROM

The EEPROM stores the absorption amounts of the waste ink absorber and vertical alignment data. The non-volatile EEPROM does not require any electrical power to retain the data it contains. Calculation of the total waste ink amount of the waste ink absorber starts immediately after the printer is used. When the absorption amount of the waste ink absorber reaches 100 percent, the waste ink full error is generated and the printing operation is stopped to prevent the waste ink from leaking out. The vertical alignment data is for correcting any vertical misalignment during bidirectional printing. The data in the EEPROM can be checked or altered.

Checking or altering the data in EEPROM

Waste ink absorption amount:

To check the amount, use the service report’s System Dump List. For details, see

Chapter 3: a-2) System dump list on Page 3-62

. To enter the amount, use the service data #7 PRINTER 3. INK ABS CAPA. For details, see

Chapter 3: 5.2.5 New SSSW's/parameters added to

this model on Page 3-41

Vertical alignment data:

To adjust the vertical alignment, see

Chapter 3: 3.2 Vertical Alignment

Correction on Page 3-7

Re-entering the waste ink absorber’s ink absorption amount.

The amount data is calculated one waste ink absorber. The waste ink absorption amount displayed in the SYSTEM DUMP LIST indicates the percentage of the respective absorber’s maximum capacity that has been reached. The percentage can be indicated and entered in 1% increments. When the waste ink generated immediately after the printer is used reaches 100 percent of the waste ink absorber’s capacity, a waste ink full error is generated for each absorber and the printing operation is stopped. Therefore when replacing the PCNT board, be sure to check the current absorption amount and enter it in the new PCNT board. If the PCNT board assembly malfunctions and the current waste ink absorption amount cannot be checked, replace the ink absorber and set the waste ink absorption amount to 0%. To replace the ink absorber, see

e) New

error codes and recovery methods on Page 3-24

Chapter 1: General Description

1-49

REFERENCE

Page 67

Part 1: Facsimile

1-50

Waste Ink absorber

Figure 1-22 Waste Ink Absorber

Page 68

5.4.4 SCNT board replacement precautions

Before replacing the SCNT board, print out all of the stored data.

The reports which output the data that must be entered into the new SCNT board is listed below.

User report

One-touch speed dialing list Coded speed dialing list Group dialing list User data list Send/Receive Activity report

Service report

System data list System dump list

To printout these reports, see

Chapter 3: 7. SERVICE REPORT on Page 3-57

To PC registration function, see

Page 1-46

The serviceable SCNT board does not have a jumper plug. This is to prevent the lithium battery power from draining. Use the jumper plug on the old SCNT board.

After the new SCNT board is installed and the power is turned on, "DATA ERROR" will be displayed. Press the START/COPY key to discard the SRAM’s irregular contents and initialize it to the factory defaults. Refer to

Chapter 3: 3. ADJUSTMENT on Page 3-6

to enter the shading data

and to adjust the vertical line alignment.

Then refer to the report that was printed out beforehand and enter the various data.

Chapter 1: General Description

1-51

REFERENCE

Page 69

5.4.5 Data initialization through service operation

All the data can be initialized with the service data #8 clear operation.

For details on the initialization procedure and the data that is erased, see

Chapter 3: 5.2 Service Data Setting on Page 3-31

"All clear" when nothing works.

On a rare occasion, the display may go blank and all the buttons may stop working. Severe electrical noise and static can cause problems as well. In such a case, use the “All clear” feature. After installing the unit for the first time and connecting the power cord, execute “All clear.” The procedure is described below.

The All clear operation initializes the user data and service data settings. The shading data are not initialized. After All clear has been executed, make a copy in the PHOTO mode and check the image. If the image contains black spots, it is evidence of shading data damage. See

Page 3-6

to re-enter the shading data.

Part 1: Facsimile

1-52

Figure 1-23 All Clear

REFERENCE

NOTE

FUNCTION

Standby

ALL

5 times

#8 CLEAR

START/COPY

Execute All clear

Page 70

5.5 Protective Mechanism

5.5.1 Data battery backup function

If there is a power outage or if the power is turned off, the data stored in the control memory is retained since the lithium battery function as a data battery backup.

For details on the backed up data, see

Chapter 1: 5.4 Data related precautions

on Page 1-46

5.5.2 BJ cartridge maintenance features

a) Cleaning

To maintain high printing quality, the fax unit has a cleaning feature that wipes off dust from the BJ cartridge nozzles with a head wiper and fills the nozzles with fresh ink.

b) Nozzle capping

The fax unit caps the BJ cartridge nozzles with the Capping section cap after the carriage returns to the front of the Capping section on the right side. This protects the nozzles from dust and prevents the ink from drying out or leaking.

c) Maintenance jet

The fax unit has a maintenance jet feature which purges ink from all the ink cartridge nozzles to the purge unit. This prevents the nozzles from clogging and ensures high printing quality.

Chapter 1: General Description

1-53

REFERENCE

Page 71

5.5.3 Heat protection mechanism

The BJ cartridge head’s aluminum panel becomes hot during printing. It also gets hot if printing continues even after the ink in the cartridge has been depleted. The aluminum panel’s temperature is detected by the BJ cartridge’s head temperature sensor.

•When the carriage is to be moved to the cartridge replacement position, the following

applies:

If the detected temperature exceeds 50°C, “WAIT COOLING” is displayed and the carriage does not move. This is to prevent the user from touching the BJ cartridge’s aluminum panel. After several minutes when the temperature decreases, the cartridge replacement procedure must be executed again.

•When a temperature exceeding the standard temperature is detected, the following

applies:

During printing, the printing head temperature is monitored every 50 ms. If the printing head temperature exceeds 75°C, a 3.5-second wait period is inserted after each printed line for 20 seconds. This is to allow the printing head to cool. After 20 seconds, the head temperature is checked. If the temperature has dropped below 75°C, normal printing resumes without any wait period inserted. However, if the head temperature is still above 75°C, the wait period is inserted after each printed line until the printing head cools sufficiently.

If a head temperature exceeding 100°C is detected for 0.2 sec. during printing, it will be deemed as a BJ head abnormal temperature error and “CHECK PRINTER ##336” will be displayed. The printing operation will also stop.

If a head temperature exceeding 100°C is detected for 1 sec. during printing, it will be deemed as a BJ head temperature sensor error and “CHECK PRINTER ##337” will be displayed. The printing operation will also stop.

5.5.4 Overcurrent protection

The fax unit has an overcurrent protection circuit with a built-in fuse to prevent an abnormal temperature increase if an overcurrent flows to the motors and power supply due to a driver IC problem, software lockup, or short circuiting.

Protected Component Safety Device

Document feed motor IC protector (FU3) on PCNT board Paper feed motor IC protector (FU1) on PCNT board Carriage motor IC protector (FU2) on PCNT board Power supply unit Glass-tube current fuse (125V, 4A), overcurrent protection

circuit

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Page 72

5.5.5 Lightning protection

The fax unit’s electrical components are protected from abnormal voltage caused by lightning.

Protected Component Safety Device

SCNT board assembly Arrestors (ZD2) on the primary side of the SCNT board NCU

discharges a voltage over 320 to 480 VDC via the power cord

When protection is not possible

The SCNT board may not be adequately protected even with the protection circuits if lightning strikes the telephone line.

5.5.6 Power leakage protection

The AC line, telephone line, and metal parts of the fax unit are completely insulated. The fax unit has a grounded power cord (three-prong plug) to prevent electrical shock. If power leakage does occur, use the fax unit only with a grounded electrical outlet supplying the proper voltage.

Chapter 1: General Description

1-55

NOTE

Page 73

6. QUALIFICA TION REQUIRED FOR INST ALLA TION WORK

The qualifications for installation must satisfy local laws and regulations.

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Page 74

Chapter 2: Technical Reference

Printer section

Document path

Manual feed paper path

Automatic feed paper path

Document feed section

Paper feed section

Separation roller

Transmission roller

Document eject roller

Document feed roller

Document pinch roller

Document feed motor

Paper eject roller

Paper feed motor

Paper feed roller

Carriage motor

Carriage belt

Transmission roller

Pickup roller

Lifting plate

1. COMPONENT LAYOUT

The mechanism is composed of the Document Feed Section, which separates pages from a stack of documents and feeds them in one at a time to the Scanning section; the Paper Supply Section, which supplies separated paper or special paper to the Printer Section, and ejects them to the paper tray after printing; and the Printer Section, which performs cleaning of the BJ head, and printing to paper. For details on each Section of the mechanism, see the sections below, beginning with

SCANNER MECHANISM on Page 2-3

Figure 2-1 Mechanical Layout

2-1

Page 75

Part 1: Facsimile

Paper edge sensor: Detects the state of paper feeding and delivery.

Pickup roller sensor: Detects the state of pickup roller.

Home position sensor: Detects the carriage position and purge unit status.

Document sensor: Detects whether or not a document is set.

Document edge sensor: Detects the trailing edge of the document.

Ink detect sensor: Detects ink fired from the BJ head,in order to detect when the BJ cartridge runs out of ink.

OPCNT board

Power supply unit

PCNT board

SCNT board

NCU board

The electrical section is composed of the following: the SCNT board, which performs system control; the NCU board, which is the interface with the telephone circuit; PCNT board; which performs BJ printer control; the power supply unit; and the OPCNT board, which detects key operations and displays status information. There are also 6 sensors to detect system status.

Figure 2-2 Electrical System Layout

2-2

Page 76

Chapter 2: Technical Reference

2. SCANNER MECHANISM

The structure of this model’s Document Feed Section is based to a large extent on that of the MultiPASS C2500.

Figure 2-3 Document Feed Section

2-3

Page 77

Part 1: Facsimile

Names and Functions of Parts

1. Paper Guide

When properly adjusted to the width of the documents, the guide will hold the documents in the horizontal direction to prevent them from skewing when fed.

2. Document Sensor (DS)

This sensor uses an actuator to detect the presence of documents to be scan, and sends that information to the SCNT board by way of the gate array in the operation panel unit.

3. Separation Guide

Separates the documents to prevent double feeding.

4. Separation Roller

Takes documents which were separated at point ①, and delivers them, one sheet at a time, to the Contact Sensor.

5. Document Edge Sensor (DES)

Using an actuator, the DES detects the edge of a document just before the Contact Sensor, and sends this information on to the SCNT board.

6. Contact Sensor ➔ See Page 2-6.

Scans the image information from the document, converts it to serial data, and transmits it to the SCNT board as an electrical signal.

7. Springs

Force the Contact Sensor upwards to press the document closely between the Contact Sensor and Document Feed Roller.

8. Document Feed Roller

Delivers and ejects the documents, keeping it pressed closely against the glass surface of the Contact Sensor so that it can be scanned clearly.

9. Static Eliminator brush

Removes static electricity which may have built up on the document in the scanning process, and guards against roller jams.

10. Transmission roller

The document feed roller revolution is transferred to the document eject roller.

11. Document eject rollers

The paper carried from the document feed roller is ejected into the recording paper tray. These rollers are driven by the transmission roller.

12. Document pinch roller

Holds the document between the document eject rollers, and then ejects it.

NOTE

Fundamentals of document separation

The separation of documents is accomplished by the difference in friction coefficients at point ① in coefficients is given by the equation.

(friction coefficient between the original and the separation roller) > (friction coefficient between the original and the friction pad) > (friction coefficient between the originals)

Figure 2-4

. The relationship between the friction

2-4

Page 78

Chapter 2: Technical Reference

Document

Separation roller

Separation guide

NOTE

Figure 2-4 Document Separation

Document Jam Detection

There are two types of document jams which may occur.

a) Feed jam

Occurs when the leading edge of the original is not detected by the Document Edge Sensor within 15 seconds after the start of document separation.

b) Eject jam/document too long

Occurs when the document is fed for one meter or more after the detection of the document’s leading edge, without detecting the document’s trailing edge.

When one of these types of jams occurs, all data which have been read and stored in memory (which are not part of a page that has already been completely transmitted or copied) are erased.

2-5

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Part 1: Facsimile

NOTE

Contact Sensor

The Contact Sensor used in the Document Feed Section scans Letter-width

8.43" (214 mm), documents at a horizontal resolution of 8 dots/mm (203.2 dpi). Resolution in the vertical direction may be selected by the button on the operation panel. Resolution is 3.85 lines/mm (97.8 lpi) in Standard mode and 7.7 lines/mm (195.6 lpi) in Fine mode (for fax transmission). For copying, the read resolution is automatically set to following. Direct copy : 360 dpi × 360 dpi Memory copy : 8 dot/mm × 7.7 line/mm

RESOLUTION

The structure of the Contact Sensor is shown in located at either end of the Contact Sensor, is directed by the optical guide, gathered by the lens, and used to illuminate the surface of the document. Light reflected back from the document surface is captured by 1728 amorphous silicon photosensor chips. The captured light is amplified as an analog signal, and sent as serial data to the System controller IC on the SCNT board. The System control IC (include UHQ 6.5 unit) on the SCNT board performs image processing (halftone) in order to cleanly transmit image documents.

Shading Correction

To compensate for variations in Contact Sensor output, this model has shading correction data stored in its control SRAM and image processing

NOTE

SRAM, when shipped from the factory. Thus, it does not perform a prescan of each page, as performed by previous models. Conformity of the shading data is maintained by comparing the data between the two previously mentioned SRAM blocks before reading each page. If for some reason, there is an error in the shading data, the message “DATA ERROR” will be displayed to indicate the shading data error. In this case, the shading correction data constant from the image processing IC SRAM is used.

When using the constant from the image processing IC SRAM, there is a possibility of black spots appearing when in Auto Halftone Mode. When this type of image defect occurs, try re-registering the shading data.

Figure 2-5

. Light from the two LED cells,

REFERENCE

For details on the shading data re-registration process, please see

2-6

Page 3-6

Page 80

Chapter 2: Technical Reference

Incident light

LED cell

Sensor glass

Incident light

Document

Illumination window

Incident light

Amorphous silicon photo sensor (1728 chips)

Lens

Control sensor logic board

Amorphous silicon photo sensor

Lens

Optical guide

Control sensor logic board

Incident light

Document

LED chip (12 chips)

Figure 2-5 Contact Sensor

Optical guide

Incident light

LED cell

2-7

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Part 1: Facsimile

3. PAPER SUPPLY MECHANISM

The paper feed mechanism in this model is taken from the BJC-4200 BJ printer. This printer has no paper selection lever on automatic sheet feeder. If paper meets specifications, it can be fed without selecting operation the paper type. Also, this printer's paper feed mechanism can supply paper in two ways, automatically from the cut sheet feeder and manually from the manual feeding slot.

Figure 2-6 Paper Feed Section

2-8

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Chapter 2: Technical Reference

Names and functions of parts:

1. Paper guide

The paper guide which slide manually is fixed align with the left side of the paper, to prevent skew.

2. Lifting Plate

This plate moves upwards by the force of the springs and the release cam mechanism, lifting the paper stack until it touches the Pickup Roller. After separation, it moves back down to its original position.

3. Pickup roller ➔ See Page 2-10.

The pickup roller has a semi circular roller. This roller is rotated once, and sends the paper once sheet at a time, as a result of corresponding operation with the lifting plate.

4. Pickup Roller Sensor (PRS)

This sensor monitors the initial position of the Pickup Roller position.

5. Paper Separator ➔ See Page 2-11.

The paper separator catches the corner of the recording paper or envelope, and holds the extra paper back.

6. Paper Edge Sensor (PES)

This sensor monitors the paper feed state, and detects jams and misfeeds.

7. Paper Feed Roller ➔ See Page 2-10.

The Paper Feed Roller transports paper, which has been picked up by the automatic sheet feeder, to the printing position in the Printer Section. It then feeds the paper one line at a time, in coordination with the carriage movement.

8. Paper Feed Motor ➔ See Page 2-10.

The Paper Feed Motor drive the paper supply mechanism and purge unit.

9. Transmission Roller

The transmission roller transmits the driving force of the paper feed roller to the paper eject roller.

10. Paper Eject Roller

A roller used to eject the paper.

11. Spur

This spur is used to transport the printed paper properly, without damaging its printed surface. It is shaped so as to make it difficult for ink to stick to it.

12. Cleaner Roller

A roller which cleans the spur when dirtied with ink.

2-9

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Part 1: Facsimile

Auto sheet feeder drive state

Swing gear

Purge unit

Control pin Fixed to swing gear

Paper feed roller Fed in forward direction by paper feed motor

Paper feed state

Paper feed roller Fed in reverse direction by paper feed motor

Control pin Pushed by carriage to release swing gear

Swing gear

Coupled with purge unit drive gear

Purge unit drive gear

Cap

Covers BJ cartridge

Pump drive state

Auto Sheet Feeder drive gear

Pickup roller

Swing gear

Coupled with ASF drive gear

Control pin Pushed by carriage to release swing gear

NOTE

Paper feed motor drive switching

Power from the paper feed motor is switched for separation and feed of the paper, and nozzle cleaning mechanisms by the direction of paper feed motor rotation, the slide lock pin on the purge unit and swing gear. When the carriage moves in front of the purge unit, the carriage pushes the control pin, and releases the swing gear driven by the paper feed motor. When the paper feed motor rotates in the paper feed direction in this state, the swing gear rotates and moves up to the auto sheet feeder drive gear to drive the auto sheet feeder. Alternately, when the paper feed motor rotates in the reverse direction, the swing gear rotates and moves up to the purge drive gear to drive the purge unit. When the control pin is locked, the paper feed roller is driven to feed the paper.

Figure 2-7 Paper Feed Motor Drive Switching

2-10

Page 84

NOTE

Pick-up Roller

Paper Separater

Paper

Chapter 2: Technical Reference

Paper Separation Mechanism (Automatic feed / Manual feed)

This model has no paper selection lever on the automatic sheet feeder. If the paper meets specifications, it can be fed without selecting operation the paper type. The paper is loaded in the auto sheet feeder such that a corner of it is caught by the paper separator. When printing starts, the pick-up roller starts to rotate through the drive of the paper feed motor. Plain paper is fed with its corner held by the paper separator, and then pushed into the paper feed section. When printing on thick paper like envelopes, as the paper is stiffer than the return force of the paper separator’s spring, the paper separator is pressed down to feed the paper.

Initial position of the pick-up roller is detected when the flag is sensed by the pick-up roller sensor on the PCNT board. When the paper is sensed by the paper edge sensor for over a second, it is fed automatically until it reaches the starting position for printing. If the paper is not sensed even when the paper pick-up operation is executed, it is executed again. If the paper is still not sensed, it is assessed as a paper feed error. When manual feeding, set the paper in the manual feeding slot until it reaches the position where the paper edge sensor detects the paper. Paper pushed into the paper feed section is fed to the starting position for printing after it has been sensed by the paper sensor for over a second. At this time, the paper passes through a different paper path from that of the cut sheet feeder. This makes it possible to give priority to manually fed paper, even when paper is loaded in the cut sheet feeder.

Figure 2-8 Paper Separation Mechanism

2-11

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Part 1: Facsimile

NOTE

Paper feed error detection

There are three types of paper feed error which may occur:

a) No paper error

Occurs when the Paper Edge Sensor does not detect the paper’s leading edge the start of the paper picked up operation is executed, it is executed again. If the paper is still not sensed , it is assessed as a No paper error.

b) Eject delay jam

Occurs when the Paper Edge Sensor does not detect the paper’s trailing edge after the page has been printed, or after 22 inches (558.8 mm) of paper eject operation has been performed.

c) Paper size error

When the size of the paper being fed is different from that registered in the user data, and the page being printed is divided during printing, a paper size error will occur.

When a paper feed error occurs, memory reception begins from the page at which the paper feed error occurred. When copying, the data are erased from memory as soon as an error occurs.

2-12

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Chapter 2: Technical Reference

4. PRINTER SECTION

The printer section mechanism in this model is taken from the BJC-4200 BJ printer. Major changes are as follows.

• Cartridge installation is not performed from the front, but from above.

• The spur attachment location has been changed.

• An ink detection sensor has been added.

Figure 2-9 Printer Section

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Part 1: Facsimile

Names and functions of parts

1. Home Position Sensor (HPS) ➔ See Page 2-15.

This sensor detects the home position edge and carriage position. Also, at the capping position, the on/off of purge sensor flag during the pump operation is detected.

2. Carriage Motor

This is a stepping/pulse type motor, which is controlled with pulse width modulation. It moves the carriage by belt drive.

3. BJ Cartridge ➔ See Page 2-20.

4. Carriage

Driven by the carriage motor, the carriage moves horizontally across the paper. Through the carriage ribbon cable, the printing signals from the logic board are transmitted to the BJ cartridge in the carriage. By controlling the purge unit’s slide lock pin, the carriage controls the engagement of the paper feed motor’s drive power between the paper feed/purge unit and the sheet feeder.

5. Paper thickness adjustment lever

Adjust the gap between the print head and paper according to the thickness of the paper.

6. Purge unit ➔ See Page 2-15.

In order to maintain the BJ cartridge’s high print quality, the BJ cartridge’s nozzles and spray orifices are cleaned by a wiper and pump. When in standby mode, the BJ cartridge’s spray orifice section is covered by a rubber cap to prevent the nozzles from drying out and ink from leaking. The purge unit controls the swing gear. This gear switches power from the paper feed motor for separation of the paper, paper feed and nozzle cleaning.

7. Ink Detection Sensor ➔ See Page 2-18.

Ink is ejected directly over the optical axis of a pass-type photosensor, which detects the change in light intensity to determine whether or not ink is being ejected.

8. Waste ink absorbers

Absorb waste ink from cleaning or ink empty detection.

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Chapter 2: Technical Reference

NOTE

Ink shield

Slide lock pin

Rubber cap

Wiper unit

Wiper control tab

Purge unit drive gear

Pump

Carriage

Home position sensor

Light shielding arm

Pump operation control arm

Piston

Pump

Rubber cap

Purge unit

For details on BJ cartridge holding, carriage drive and pump operation state detection, see the

separately).

FACSIMILE BASIC•INTER SUPPLEMENT 2 (supplied

Figure 2-10 Purge Unit

Figure 2-11 Pump Operation State Detection

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Part 1: Facsimile

NOTE

BJ head protection

In order to always maintain good print quality, this model performs cleaning of the BJ head at appropriate times. There are three types of cleaning operations: pump suction, wiping, and maintenance jet. Also, the print head is capped after printing, to preserve the head.

• Cleaning operation (pump suction) Cleaning operation is performed using the cap and pump of the purge unit.

The cleaning operation is performed at the following times:

• When the user initiates a cleaning operation

• At power-on

• When the BJ cartridge is changed

• At the start of a print operation when at least 72 hours has passed since

the last cleaning (However, when using the BC-21/BC-22, the first cleaning after changing the BJ cartridge/ink cartridge will occur when a print operation begins after 24 hours or more.)

• Wiping operation When the carriage passes by from left to right, the wiper blade drops down so that it does not touch the print head. When the carriage passes by from right to left, the blade rises to contact the print head and wipe away paper fibers and ink residue.

The wiping operation is performed at the following times:

• At the start of printing when less than 72 hours has passed since the last

cleaning operation

• Every 60 seconds during printing (or after a fixed number of dots have been

ejected)

• During a capping operation

• Maintenance jet The maintenance jet operation prepares the nozzle spray orifice ink surface shape by performing an ink test, firing at the maintenance jet absorber. The maintenance jet operation is performed during a cleaning operation, after a wiping operation, and after a fixed time (BC-20: 12 seconds; BC-21/BC-22: variable, between 5 and 20 seconds) while printing.

• Capping after print completion The capping operation is performed at the following times:

• When a fixed amount of time passes after the completion of printing without

new print data being received by the Printer Section

• During printing, after the second wiping operation (i.e. after 120 seconds)

with no print data received by the Printer Section

• After changing the BJ cartridge

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NOTE

Chapter 2: Technical Reference

Print Shift Correction

Print gaps can occur when doing bidirectional printing, due to changes in the weight of the BJ cartridge and mechanical errors. This gap is corrected by adjusting the carriage drive motor load and the carriage position, which is determined logically from the number of stepping pulses. Gap detection is performed before the start of printing, during the home position detection operation.

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Part 1: Facsimile

Signal sends to

PCNT board

Ink detect sensor

Cartridge

NOTE

Ink empty detection

Ink empty detection during fax operation is performed by firing black ink between the light source and receptor of the ink sensor, located on the left side of the printer. This function does not work with the BC-22, only with BC-21 or BC-20. When ink passes between the source and the receptor, as shown in the sensor output will be a pulse waveform. The presence of ink may be determined from the pulse generation time. Ink empty detection is performed at the end of each received page of printing. If it is determined that there is ink remaining, the image data for that page will be erased from memory. If the cartridge is out of ink, the message “REPLACE CARTRIDGE” will be displayed to inform the user that the cartridge is out of ink, and the page will be “received” to memory again from the image data. The detection level of the ink detection sensor is adjusted automatically by means of a feedback circuit, and thus requires no manual adjustment. If the sensor output does not reach a standard level, even after performing feedback control (such as if the receptor is completely blocked, or if a sensor defect occurs), the ink sensor failure will be reported with the display of the “CHECK PRINTER” (error code ##348) message.

Figure 2-12

Figure 2-12 Ink Empty Detection

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NOTE

Chapter 2: Technical Reference

Waste Ink Absorbers

This model has a single ink absorber which absorbs waste ink as follows.

• Suction waste ink Waste ink sucked from the cap

• Maintenance jet waste ink Waste ink from the test firing used to adjust the nozzle condition

• Ink detection waste ink Waste ink fired to detect the presence of remaining ink during fax receipt

The amount of ink absorbed is counted as a total of all of these. When the counted absorption levels reach 100%, the “CHECK PRINTER” message (error code ##342) will be displayed, and printing will stop to allow the absorber to be changed. To clear the error, it is necessary to replace the absorbers and to reset the waste ink absorption level counts. If there is no other error at this time, any image in the memory will be output automatically. The waste ink absorber should be replaced after this. For the method of resetting the waste ink absorption level counts, see

Page 1-49.

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Part 1: Facsimile

Nozzle 1

Nozzle 128

Nozzle 1

Nozzle 136

Yellow Nozzles 1 to 24 Magenta Nozzles 25 to 48 Cyan Nozzles 49 to 72

Black Nozzles 73 to 136

Black BJ Cartridge Color BJ Cartridge

Photo BJ Cartridge

5. BJ CARTRIDGE

This model accepts three types of BJ cartridges, the BC-20, BC-21 and BC-22.

5.1 Structure

a) BC-20 Black BJ cartridge structure

The black BJ cartridge contains a 360 dpi × 128 nozzle bubble jet print head unit, ondemand thermal ink jet type, containing 44 ml of ink. The black ink contained in the ink sponge is filtered with a meshed ink filter to remove dust, and sucked into bubble jet print head unit through a joint pipe.

b) BC-21 Color BJ cartridge structure

The color BJ cartridge has a printing head equipped with 360 dpi × 136 nozzles through which the four ink colors are ejected (24 nozzles each for yellow, magenta, and cyan; 64 nozzles for black). The ink cartridge (one for black and one for the other three colors) are removable and replaceable. The BCI-20 black ink tank contains 9 ml of black ink. The BCI-21 color ink tank contains 5 ml each of yellow, cyan, and magenta ink.

c) BC-22 Photo Color BJ cartridge structure

The photo color BJ cartridge has a printing head equipped with 360 dpi × 136 nozzles through which the four ink colors are ejected (24 nozzles each for yellow, magenta, and cyan; 64 nozzles for black). The BJ cartridge contains 9 ml of black ink , 5 ml each of yellow, cyan and magenta ink.

For details on the structure of the Bubble jet head unit structure (Printing mechanism), INKSAVER (economy) printing, and maintenance jet, see the

REFERENCE

FACSIMILE BASIC•INTER SUPPLEMENT 2 (supplied separately)

Figure 2-13 Nozzle Arrangement

2-20

Page 94

Cartridge Body

Chapter 2: Technical Reference

Air Intake Plate

Cartridge Cover

Ink Sponge

Ink Filter

Label

Aluminum Plate

128 Bubble Jet Nozzles

Rubber Sheet

Ink Filter

Cartridge Body

Label

Ink Passage Section

136 Bubble Jet Nozzles

Faceplate

Joint Pipe

Faceplate

Bubble Jet Head Unit

Signal Connection Point

Figure 2-14 Black BJ Cartridge Structure

Air Intake Plate

Cartridge Cover

Ink Sponges

Ink Suppliers

Label

Holder

Aluminum Plate

Signal Connection Point

Bubble Jet Head Unit

Ink Suppliers

Label

Air Intake Plate

Cartridge Cover

Ink Sponge

Figure 2-15 Color BJ Cartridge Structure

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Part 1: Facsimile

Aluminum Plate

Signal Connection Point

136 Bubble Jet Nozzles

Faceplate

Bubble Jet Head Unit

Ink Filter

Ink Sponges

Air Intake Plate

Ink Sponge

Figure 2-16 Photo BJ Cartridge Structure

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Chapter 2: Technical Reference

5.2 BJ Head Driver Block Diagram

• 128/136 bit shift resistor

Stores the printing data (HDATA) transferred from the control board at HCLOCK’s timing.

• 128/136 bit latch

Latches the printing data (HDATA) converted by the 128/136 bit shift resistor.

• Block enable decoder

After the BENB (Block enable) 0, 1, and 2 code signals are input, the specified heat timing signal is output. The heat timing signal is divided into eighth.

• Heater (1 to 128 and 1 to 136)

The heater generates the bubbles required for the nozzles to eject the ink. The heater heats the bubble jet nozzles. Heating is executed with the timing signal produced by the block enable decoder and the even nozzle heat enable (EvenENB), odd nozzle heat enable (OddENB), and heat enable (HENB0 to 3) signals.

• Sub heater

This heater maintains the optimum conditions in the nozzle for ejecting ink.

• Temperature control heater

This heater controls the head temperature to stabilize the ink ejecting amount.

• Rank resistor

To execute optimum heat control of each BJ cartridge, production-related deviation in heater characteristics is classified into 13 types which are identified by changing the rank resistance. From the printer MPU’s analog port, the printer MPU detects the different rank resistance as voltage values and converts them from analog to digital for detection. The heater’s characteristics are thereby recognized.

• Head temperature sensor

Temperature changes in the nozzle’s heater are detected by the diode to prevent the bubble jet head from overheating.

• Cartridge ID

With the ID0 and ID1 combinations, the BJ cartridge type (color or black or photo) is recognized.

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Part 1: Facsimile

1 2 3

4 16

121 122 123 124

136

16 24

121 122

135 136

Heater 1

Heater 24

Heater 25

Heater 72 Heater 73

Heater

136

Yellow

Magenta

Cyan

Black

Temperature Control Heater x 2

Rank Resistor Sub-heater x 2

136bit Shift Resistor

136bit Latch

Head Temperature Sensor

HTO HVH

HTI

RANK

VHG

W-HT

<0> <1> <2> <3>

<0> <1> <2>

HENB

Odd ENB

Even ENB

BENB

HDATA

HCLOCK

HRES

HLATCH

HVdd

HVss

DIODE A

DIODE K

ID0 ID1

135 136

136bit

Tr.

Array

1 2

4 8

Block Enable

Decoder

Heater 48 Heater 49

Delay

ID0 ID1

Color BJ Cartridge

Photo BJ Cartridge

Color BJ cartridge and Photo BJ cartridge have the same circuit configuration except for the ID1 connection.

RANK

W-HT

H ENB

Odd ENB

Even ENB

B ENB

HDATA

HCLOCK

HRES

HLATCH

DIODE A

DIODE K

HTO

HVH

HTI

VHG

<0> <1>

<0> <1> <2>

HVdd

HVss

ID0 ID1

128bit Shift Resistor

Temperature Control Heater x 2

Rank Resistor Sub-heater x 2

1 2

Block Enable

Decoder

Head Temperature Sensor

128bit Latch

128

113 114

127 128

Delay

113 114 115 116

127 128

Heater 1

1 2 3

4 16

128bit

Tr.

Array

Heater

128

Figure 2-17 BJ Head Driver Block Diagram (Black BJ Cartridge)

Figure 2-18 BJ Head Driver Block Diagram (Color BJ Cartridge)

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Chapter 2: Technical Reference

5.3 Printing Signal

a) Black BJ cartridge drive control

The black BJ cartridge driving control is executed by dividing the head’s 128 nozzles into 8 blocks (16 nozzles each). These blocks are further divided into odd and even blocks (8 nozzles each). The odd blocks eject ink simultaneously, and the even blocks do so as well. The control signals for the former are the block enable 1, 2, and 3 signals (BENB 1, 2, 3), and for the latter the signals are the even/odd enable signals (Even/odd ENB). The heat enable 0 and 1 (HENB 0, 1), which are the heater drive control signals for ejecting the ink, comprise the pre-pulse and main pulse. To constantly achieve optimum ink ejecting, the internal conditions such as the head’s rank, printer temperature, head temperature are monitored, and the heater drive pulse width is varied before the pulse is output. Also, the printing drive signal from the printer controller is transferred to the BJ head’s shift resistor according to the HLATCH timing. The printing drive signal (HDATA) is latched and when the printing control signal and heater drive control signal are output together, the heater for the applicable nozzles is driven, and the ink is ejected.

b) Color BJ cartridge drive control

The color BJ cartridge head’s nozzle configuration differs from that of the black BJ cartridge. (The black has 64 nozzles while the color has 24 nozzles each for Y, M, and C.) Therefore, the number of nozzles in each control block is different from that of the black BJ cartridge. Also, since the heaters are driven simultaneously for each color, the heater drive control signals used are the heat enable (HENB) 0, 1, 2, and 3 signals. Otherwise, everything else is the same as with the black BJ cartridge. For heat enable, the HENB 0, 1, and 2 signals drive the nozzle heaters for Y, M, and C. The HENB 3 signal drives the nozzle heater for black ink.

BE1 BE2 BE3 BE4 BE5 BE6 BE7

BE8

O E O E O E O E O E O E O E

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364

BE1 to BE 8 : Block Enable 1 to 8 E : Even Enable O : Odd Enable A : Heat Enable 0 B : Heat Enable 1

Figure 2-19 Printing Sequence (Black BJ Cartridge/HQ Mode)

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Part 1: Facsimile

HLATCH

01234

128or136

1(0) 0(1)

1(0) 0(1) 1(0) 0(1)

1(0) 0(1)

HDATA HCLOCK

Odd ENB Even ENB B ENB 0 B ENB 1 B ENB 2

H ENB 0,1,2

H ENB 3

Odd ENB Even ENB

B ENB 0 B ENB 1

B ENB 2 H ENB 0,1,2

H ENB 3

Data transmission to shift resistor

Head Driving in HQ Mode (Divided into 16)

Head Driving in HS Mode (Divided into 8)

1 Block

154µs (6.51kHz)

77µs (13.02kHz/9.76kHz*) 109µs (9.19kHz)

HQ 720dpi/ Smoothing HS

Pre-Pulse

Main Pulse

1(0) 0(1) 1(0) 0(1) 0(1)1(0) 1(0) 0(1)

1 Block

Variable Pulse Width

*9.76kHz: Color/1pass:

Figure 2-20 Printing Signals (HQ Mode)

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Page 100

6. ELECTRIC CIRCUIT

+5V

Data backup

ROM

8M bit

(IC301)

SRAM

256K bit

(IC302)

Real-time

clock IC

(IC203)

System control section

NCU board

DRAM

4M bit

(IC303)

Communication

control section

Serial transmission

Operation panel unit

Modem IC R144EFXL

(IC701)

Reset IC

(IC202)

Address Bus A0 to A23

Document edge sensor

System controller (1/3)

(IC401)

MPU

(IC201)

32 MHz

Address/Data Bus AD0 to AD7

Driver IC

(IC 12)

Driver IC

(IC 6)

Sub-

heater

Carriage

motor

Home position

sensor

BJ head

Paper feed

motor

Printer

controller

(IC5)

System controller (2/3)

(IC401)

ROM

8M bit

(IC3)

Temperature

sensor

DRAM 4M bit

(IC4)

Data Bus D0 to D15

Cartridge detection

Bi-Centronics

interface

Printer control

section

MPU

(PRINTER)

(IC1)

Power supply

unit

+12V

+24V

+5V

AC120V

Ink detect sensor

Document sensor

20MHz

EEP ROM

(IC8)

Heater

driver

Heater

driver

Speaker

AMP.

Address Bus A0 to A23

Pulse genration circuit

Driver IC

(IC 302)

Document feed

motor

Regulator

(IC403)

DRAM

4M bit

(IC307)

Pickup roller

sensor

UHQ-6.5 function

SRAM

256K bit

(IC402)

Contact sensor

Document

scanning

section

System controller

(3/3) (IC401)

Paper edge

sensor

6.1 Component Block Diagram

Chapter 2: Technical Reference

Figure 2-21 Block Diagram

2-27