Canon iR2020 Series User manual

Oct 3 2005
Service Manual
iR2020/2016 Series

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 contents 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 edition
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 used in this manual are the registered trademarks of the individual companies.
Copyright
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.
COPYRIGHT © 2001 CANON INC.
Printed in Japan
Caution
Use of this manual should be strictly supervised to avoid disclosure of confidential information.

Introduction
Symbols Used
This documentation uses the following symbols to indicate special information:
Symbol Description
Indicates an item of a non-specific nature, possibly classified as Note, Caution, or Warning.
Indicates an item requiring care to avoid electric shocks.
Indicates an item requiring care to avoid combustion (fire).
Indicates an item prohibiting disassembly to avoid electric shocks or problems.
Indicates an item requiring disconnection of the power plug from the electric outlet.
Indicates an item intended to provide notes assisting the understanding of the topic in question.
Indicates an item of reference assisting the understanding of the topic in question.
Provides a description of a service mode.
Provides a description of the nature of an error indication.
Memo
REF.

Introduction
The following rules apply throughout this Service Manual:
1. Each chapter contains sections explaining the purpose of specific functions and the relationship between electrical and mechanical systems with refer-
ence to the timing of operation.
In the diagrams, represents the path of mechanical drive; where a signal name accompanies the symbol , the arrow indicates the
direction of the electric signal.
The expression "turn on the power" means flipping on the power switch, closing the front door, and closing the delivery unit door, which results in
supplying the machine with power.
2. In the digital circuits, '1'is used to indicate that the voltage level of a given signal is "High", while '0' is used to indicate "Low".(The voltage value, how-
ever, differs from circuit to circuit.) In addition, the asterisk (*) as in "DRMD*" indicates that the DRMD signal goes on when '0'.
In practically all cases, the internal mechanisms of a microprocessor cannot be checked in the field. Therefore, the operations of the microprocessors
used in the machines are not discussed: they are explained in terms of from sensors to the input of the DC controller PCB and from the output of the
DC controller PCB to the loads.
The descriptions in this Service Manual are subject to change without notice for product improvement or other purposes, and major changes will be com-
municated in the form of Service Information bulletins.
All service persons are expected to have a good understanding of the contents of this Service Manual and all relevant Service Information bulletins and be
able to identify and isolate faults in the machine."

Contents
Contents
Chapter 1 Introduction
1.1 System Construction ...................................................................................................................................... 1- 1
1.1.1 Pickup/ Delivery /Original Handling Accessories System Configuration (iR2020/iR2020J) ........ 1- 1
1.1.2 Pickup/ Delivery /Original Handling Accessories System Configuration (iR2016/iR2016J) ........ 1- 2
1.1.3 Reader Heater/ Cassette Heater System Configuration ................................................................... 1- 3
1.1.4 Printing/Transmitting Accessories System Configuration (iR2020J/iR2016J) ............................... 1- 3
1.1.5 Printing/Transmitting Accessories System Configuration (iR2020/iR2016) ................................... 1- 4
1.1.6 Functions of the Printing/Transmission Functions (iR2020/iR2016) ............................................... 1- 4
1.2 Product Specifications ................................................................................................................................... 1- 5
1.2.1 Names of Parts ......................................................................................................................................... 1- 5
1.2.1.1 External View ÅiiR2020/iR2020J) .................................................................................................. 1- 5
1.2.1.2 External View ÅiiR2016/iR2016J) .................................................................................................. 1- 6
1.2.1.3 Cross-Section.................................................................................................................................... 1- 7
1.2.2 Using the Machine ................................................................................................................................... 1- 8
1.2.2.1 Turning On the Power Switch ......................................................................................................... 1- 8
1.2.2.2 When Turning Off the Main Power Switch.................................................................................... 1- 9
1.2.2.3 Control Panel................................................................................................................................... 1- 10
1.2.3 User Mode Items .................................................................................................................................... 1- 11
1.2.3.1 Common Settings ........................................................................................................................... 1- 11
1.2.3.2 Copy Settings .................................................................................................................................. 1- 11
1.2.3.3 FAX Settings.................................................................................................................................... 1- 11
1.2.3.4 Address Book Set........................................................................................................................... 1- 12
1.2.3.5 Printer Settings................................................................................................................................1-12
1.2.3.6 Timer Settings ................................................................................................................................. 1- 13
1.2.3.7 Report Settings ............................................................................................................................... 1- 13
1.2.3.8 Adjust./Cleaning.............................................................................................................................. 1- 13
1.2.3.9 System Settings .............................................................................................................................. 1- 13
1.2.4 Maintenance by the User ...................................................................................................................... 1- 15
1.2.4.1 User Maintenance Items................................................................................................................ 1- 15
1.2.4.2 Cleaning ........................................................................................................................................... 1- 15
1.2.5 Safety ....................................................................................................................................................... 1- 16
1.2.5.1 Safety of the Laser Light................................................................................................................ 1- 16
1.2.5.2 CDRH Regulations ......................................................................................................................... 1- 16
1.2.5.3 Handling the Laser Unit ................................................................................................................. 1- 17
1.2.5.4 Safety of Toner................................................................................................................................1-17
1.2.5.5 Point to Note about Fire................................................................................................................. 1- 18
1.2.5.6 Cautions as to the replacement and disposal of lithium battery.............................................. 1- 18
1.2.6 Product Specifications ........................................................................................................................... 1- 19
1.2.6.1 Product Specifications ................................................................................................................... 1- 19
1.2.7 Function List............................................................................................................................................ 1- 20
1.2.7.1 Printing Speed (iR2020/iR2020J)................................................................................................. 1- 20
1.2.7.2 Printing Speed (iR2016/iR2016J)................................................................................................. 1- 21
1.2.7.3 Types of Paper................................................................................................................................1-21

Contents
Chapter 2 Installation
2.1 Making Pre-Checks ........................................................................................................................................2- 1
2.1.1 Selecting the Site of Installation.............................................................................................................2- 1
2.1.2 Before Starting the Work (230V EUR)..................................................................................................2- 1
2.2 Unpacking and Installation ............................................................................................................................2- 3
2.2.1 Unpacking and Removing the Packaging Materials...........................................................................2- 3
2.2.2 Installing the Drum Unit...........................................................................................................................2- 3
2.2.3 Installing the Toner Bottle.......................................................................................................................2- 4
2.2.4 Setting the Cassettes ..............................................................................................................................2- 5
2.2.5 Attaching the Ferrite Core.......................................................................................................................2- 6
2.2.6 Checking the Image Quality ...................................................................................................................2- 6
2.2.7 Setting the Country/Region ....................................................................................................................2- 7
2.2.8 Setting the Date and Time......................................................................................................................2- 7
2.3 Checking the Connection to the Network....................................................................................................2- 8
2.3.1 Checking the Network Connection........................................................................................................2- 8
2.4 Installing the Card Reader.............................................................................................................................2- 9
2.4.1 Points to Note ...........................................................................................................................................2- 9
2.4.2 Checking the Contents............................................................................................................................2- 9
2.4.3 Installation Procedure............................................................................................................................2- 10
2.4.4 Registering the Card IDs.......................................................................................................................2- 16
2.5 Installing the Heater PCB ............................................................................................................................2- 17
2.5.1 Unpacking and Checking the Contents ..............................................................................................2- 17
2.5.2 Preparing the Host Machine.................................................................................................................2- 17
2.5.3 Installing the Heater PCB .....................................................................................................................2- 19
2.6 Installing the Reader Heater........................................................................................................................2- 22
2.6.1 Unpacking and Checking the Contents ..............................................................................................2- 22
2.6.2 Installing the Reader Heater Harness.................................................................................................2- 22
2.6.3 Removing Reader Components ..........................................................................................................2- 26
2.6.4 Removing Parts at the Left of the Reader..........................................................................................2- 27
2.6.5 Installing the Reader Heater.................................................................................................................2- 29
2.7 Installing the Cassette Heater.....................................................................................................................2- 32
2.7.1 Unpacking and Checking the Contents ..............................................................................................2- 32
2.7.2 Preparing the Host Machine.................................................................................................................2- 32
2.7.3 Installing the Cassette Heater..............................................................................................................2- 32
Chapter 3 Main Controller
3.1 Construction.....................................................................................................................................................3- 1
3.1.1 Construction and Mechanisms...............................................................................................................3- 1
3.2 Construction of the Electrical Circuitry.........................................................................................................3- 1
3.2.1 Image Processor PCB.............................................................................................................................3- 1
3.3 Image Processing ...........................................................................................................................................3- 2
3.3.1 Overview of the Image Flow...................................................................................................................3- 2
3.3.2 Construction of the Image Processing Module ...................................................................................3- 3
3.3.3 Reader Unit Input Image Processing....................................................................................................3- 3
3.3.4 Compressio/ Extesion/ Editing Block ...................................................................................................3- 4
3.3.5 Compressio/ Extesion/ Editing Block ...................................................................................................3- 4
3.3.6 Printer unit Output Image Processing...................................................................................................3- 5

Contents
3.4 Flow of Image Data ........................................................................................................................................ 3- 5
3.4.1 Flow of Image Data According to Copy Functions ............................................................................. 3- 5
3.4.2 Flow of Image Data for the SEND Function ........................................................................................ 3- 6
3.4.3 Flow of Image Data for the Fax Transmission .................................................................................... 3- 6
3.4.4 Flow of Image Data for the Fax Reception Function.......................................................................... 3- 7
3.4.5 Flow of Image Data for the PDL Function............................................................................................ 3- 7
3.5 Parts Replacement Procedure ..................................................................................................................... 3- 9
3.5.1 Main Controller PCB ................................................................................................................................3-9
3.5.1.1 Removing the Rear Cover............................................................................................................... 3- 9
3.5.1.2 Removing the Left Cover (Rear) .................................................................................................... 3- 9
3.5.1.3 Removing the RAM Cover............................................................................................................... 3- 9
3.5.1.4 Removing the SDRAM..................................................................................................................... 3- 9
3.5.1.5 Removing the LAN Cover................................................................................................................ 3- 9
3.5.1.6 Removing the IP Cover.................................................................................................................... 3- 9
3.5.1.7 Removing the IP Cover.................................................................................................................. 3- 10
3.5.1.8 Removing the image processor PCB .......................................................................................... 3- 11
3.5.1.9 Procedure after Replacing the Image Processor PCB ............................................................ 3- 11
3.5.2 SDRAM .................................................................................................................................................... 3- 11
3.5.2.1 Removing the Rear Cover............................................................................................................. 3- 11
3.5.2.2 Removing the RAM Cover............................................................................................................. 3- 11
3.5.2.3 Removing the SDRAM................................................................................................................... 3- 12
Chapter 4 Original Exposure System
4.1 Construction..................................................................................................................................................... 4- 1
4.1.1 Specifications, Control Methods, and Functions ................................................................................ 4- 1
4.1.2 Major Components .................................................................................................................................. 4- 1
4.1.3 Control System Configuration................................................................................................................ 4- 2
4.1.4 Reader Controller PCB ........................................................................................................................... 4- 2
4.2 Basic Sequence .............................................................................................................................................. 4- 3
4.2.1 Basic Sequence at Power-on ................................................................................................................ 4- 3
4.2.2 Basic Sequence after Depression of Start Key (Book mode, One Sheet of original)................... 4- 4
4.2.3 Basic Sequence after Depression of Start Key (ADF Mode, One Sheet of Original)................... 4- 4
4.3 Various Control ............................................................................................................................................... 4- 5
4.3.1 Controlling the Scanner Drive System.................................................................................................. 4- 5
4.3.1.1 Outline ................................................................................................................................................ 4- 5
4.3.1.2 Reader Motor Control....................................................................................................................... 4- 6
4.3.2 Contact Image Sensor (CIS) .................................................................................................................. 4- 6
4.3.2.1 Outline ................................................................................................................................................ 4- 6
4.3.2.2 Analog Control Performed by the CIS ........................................................................................... 4- 7
4.3.3 Enlargement/Reduction........................................................................................................................... 4- 8
4.3.3.1 Magnification Change in Vertical Scan Direction......................................................................... 4- 8
4.3.3.2 Magnification Change in Horizontal Scan Direction.................................................................... 4- 8
4.3.4 Detecting the Size of Originals............................................................................................................... 4- 8
4.3.4.1 Outline ................................................................................................................................................ 4- 8
4.3.4.2 Outline of Original Size Detection .................................................................................................. 4- 9
4.3.5 Dirt Sensor Control................................................................................................................................. 4- 10
4.3.5.1 Outline .............................................................................................................................................. 4- 10
4.3.6 Image Processing................................................................................................................................... 4- 11

Contents
4.3.6.1 Outline...............................................................................................................................................4- 11
4.3.6.2 CMOS Sensor Drive .......................................................................................................................4- 12
4.3.6.3 CMOS Sensor Output Gain Correction and Offset Correction ................................................4- 13
4.3.6.4 CMOS Sensor Output A/D Conversion .......................................................................................4- 13
4.3.6.5 Shading Correction (Outline) ........................................................................................................4- 13
4.3.6.6 Shading Adjustment........................................................................................................................4- 13
4.3.6.7 Shading Correction .........................................................................................................................4- 13
4.4 Parts Replacement Procedure....................................................................................................................4- 14
4.4.1 Copyboard glass.....................................................................................................................................4- 14
4.4.1.1 Removing the Copyboard glass....................................................................................................4- 14
4.4.1.2 Removing the ADF Reading Glass ..............................................................................................4- 14
4.4.2 Reader Controller PCB ..........................................................................................................................4- 14
4.4.2.1 Removing the Rear Cover .............................................................................................................4- 14
4.4.2.2 Removing the Right Cover (Lower)..............................................................................................4- 14
4.4.2.3 Removing the Right Cover (Upper)..............................................................................................4- 15
4.4.2.4 Removing the Left Cover (Rear)...................................................................................................4- 15
4.4.2.5 Removing the Reader Rear Cover...............................................................................................4- 15
4.4.2.6 Removing the Copyboard glass....................................................................................................4- 15
4.4.2.7 Removing the Reader Controller PCB.........................................................................................4- 16
4.4.3 Scanner Motor.........................................................................................................................................4- 17
4.4.3.1 Removing the Rear Cover .............................................................................................................4- 17
4.4.3.2 Removing the Right Cover (Lower)..............................................................................................4- 17
4.4.3.3 Removing the Right Cover (Upper)..............................................................................................4- 17
4.4.3.4 Removing the Left Cover (Rear)...................................................................................................4- 17
4.4.3.5 Removing the Reader Rear Cover...............................................................................................4- 18
4.4.3.6 Removing the Scanner Motor .......................................................................................................4- 18
4.4.4 Contact sensor........................................................................................................................................4- 18
4.4.4.1 Removing the Rear Cover .............................................................................................................4- 18
4.4.4.2 Removing the Right Cover (Lower)..............................................................................................4- 18
4.4.4.3 Removing the Right Cover (Upper)..............................................................................................4- 19
4.4.4.4 Removing the Left Cover (Rear)...................................................................................................4- 19
4.4.4.5 Removing the Reader Rear Cover...............................................................................................4- 19
4.4.4.6 Removing the Copyboard glass....................................................................................................4- 19
4.4.4.7 Removing the Contact Image Sensor (CIS) ...............................................................................4- 20
4.4.4.8 Procedure after Replacing the CIS ..............................................................................................4- 20
4.4.5 Copyboard Cover Open/Close Sensor................................................................................................4- 20
4.4.5.1 Removing the Rear Cover .............................................................................................................4- 20
4.4.5.2 Removing the Right Cover (Lower)..............................................................................................4- 21
4.4.5.3 Removing the Right Cover (Upper)..............................................................................................4- 21
4.4.5.4 Removing the Left Cover (Rear)...................................................................................................4- 21
4.4.5.5 Removing the Reader Rear Cover...............................................................................................4- 21
4.4.5.6 Removing the Copyboard Cover Open/Close Sensor (Front/Rear) .......................................4- 22
4.4.6 Contact Sensor HP Sensor...................................................................................................................4- 22
4.4.6.1 Removing the Copyboard glass....................................................................................................4- 22
4.4.6.2 Removing the ADF Reading Glass ..............................................................................................4- 22
4.4.6.3 Removing the Contact Sensor HP Sensor..................................................................................4- 23
4.4.7 Original Size Sensor ..............................................................................................................................4- 23
4.4.7.1 Removing the Copyboard glass....................................................................................................4- 23
4.4.7.2 Removing the Original Sensor (Vertical Scan Direction)..........................................................4- 23