Canon Imagerunner 7095 printer User manual

SERVICE

MANUAL

imageRUNNER

7105/7095/7086

DU7-1166-000

NOVEMBER 2005

REV. 0

SM main cover.qxp 11/28/2005 2:28 PM Page 1

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.

translated into another language, in whole or in part, without the written consent of 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 communicated in the form of Service Information bulle-

tins.

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

Chapter 1 Introduction

1.1 System Construction......................................................................................................................................1- 1

1.1.1 System Configuration with Input/Output Accessories........................................................................ 1- 1

1.1.2 Combination of Delivery Accessories...................................................................................................1- 2

1.1.3 System Configuration with Printing/Transmission Accessories....................................................... 1- 4

1.1.4 Functions of Printing/Transmission Accessories................................................................................ 1- 4

1.2 Product Specifications ...................................................................................................................................1- 5

1.2.1 Names of Parts......................................................................................................................................... 1- 5

1.2.1.1 External View.....................................................................................................................................1- 5

1.2.1.2 Cross Section.................................................................................................................................... 1- 6

1.2.2 Using the Machine ...................................................................................................................................1- 7

1.2.2.1 Power Switch.....................................................................................................................................1- 7

1.2.2.2 Points to Note About Turning Off the Main Power Switch ......................................................... 1- 8

1.2.2.3 Control Panel.....................................................................................................................................1- 9

1.2.3 User Mode Items......................................................................................................................................1- 9

1.2.3.1 Common Settings............................................................................................................................. 1- 9

1.2.3.2 Timer Settings .................................................................................................................................1- 12

1.2.3.3 Adjustment/Cleaning...................................................................................................................... 1- 13

1.2.3.4 Report Settings ...............................................................................................................................1- 14

1.2.3.5 System Settings.............................................................................................................................. 1- 14

1.2.3.6 Copy Settings.................................................................................................................................. 1- 16

1.2.3.7 Communications Settings.............................................................................................................. 1- 17

1.2.3.8 Mail Box Settings............................................................................................................................ 1- 17

1.2.3.9 Address Book Settings................................................................................................................... 1- 18

1.2.3.10 Voice Guide Settings....................................................................................................................1- 18

1.2.4 Safety.......................................................................................................................................................1- 18

1.2.4.1 Safety About Laser Light...............................................................................................................1- 18

1.2.4.2 CDRH Regulations......................................................................................................................... 1- 18

1.2.4.3 Handling of the Laser Assembly...................................................................................................1- 19

1.2.4.4 Safety of Toner................................................................................................................................1-19

1.2.5 Product Specifications........................................................................................................................... 1- 20

1.2.5.1 Product Specifications ................................................................................................................... 1- 20

1.2.6 Function List............................................................................................................................................1- 22

1.2.6.1 Print Speed......................................................................................................................................1- 22

1.2.6.2 Paper Type ......................................................................................................................................1- 23

1.2.7 RDS Specification .................................................................................................................................. 1- 24

1.2.7.1 Embedded RDS (e-RDS) .............................................................................................................. 1- 24

Chapter 2 Installation

2.1 Making Pre-Checks........................................................................................................................................2- 1

2.1.1 Points to Note Before Starting the Installation Work.......................................................................... 2- 1

2.1.2 Selecting the Site of Installation............................................................................................................ 2- 1

Contents

2.1.3 Installation Space.....................................................................................................................................2- 3

2.1.4 Checking the Contents............................................................................................................................2- 4

2.1.5 Order of Installing Accessories..............................................................................................................2- 6

2.2 Unpacking and Installation ............................................................................................................................2- 7

2.2.1 Points to Note When Turning On/Off the Main Power.......................................................................2- 7

2.2.2 Unpacking .................................................................................................................................................2- 7

2.2.3 Mounting the Scanner System...............................................................................................................2- 9

2.2.4 Mounting the Fixing Assembly.............................................................................................................2- 10

2.2.5 Mounting the Charging Assembly .......................................................................................................2- 10

2.2.6 Mounting the Charging Assembly .......................................................................................................2- 12

2.2.7 Mounting the Developing Assembly....................................................................................................2- 15

2.2.8 Mounting the Pickup Assembly............................................................................................................2- 17

2.2.9 Mounting the Control Panel..................................................................................................................2- 17

2.2.10 Supplying Toner...................................................................................................................................2- 23

2.2.11 Turning On the Main Power ...............................................................................................................2- 23

2.2.12 Stirring the Toner .................................................................................................................................2- 23

2.2.13 Index Sheet Attachment......................................................................................................................2- 24

2.2.14 Other attachment .................................................................................................................................2- 24

2.2.15 Others ....................................................................................................................................................2- 24

2.2.16 Attaching the Labels, Placing Paper, and Checking Images and Operation (user mode).......2- 25

2.2.17 Adjusting the Horizontal Registration................................................................................................2- 27

2.2.18 Adjusting the Lead Edge Registration..............................................................................................2- 29

2.2.19 Setting the Cassette............................................................................................................................2- 29

2.2.20 Correcting the Skew ............................................................................................................................2- 29

2.2.21 Switching Over the Paper Size for the Front Deck (right, left)......................................................2- 30

2.2.22 Checking the Operation in a System Configuration .......................................................................2- 30

2.3 Checking the Connection to the Network..................................................................................................2- 31

2.3.1 Checking the Network Connections....................................................................................................2- 31

2.3.2 Using the PING Command...................................................................................................................2- 31

2.3.3 Making a Check Using a Remote Host Address...............................................................................2- 31

2.4 Troubleshooting the Network......................................................................................................................2- 32

2.4.1 Troubleshooting the Network...............................................................................................................2- 32

2.4.2 Making a Check Using a Loop Back Address...................................................................................2- 32

2.4.3 Making a Check Using a Local Host Address...................................................................................2- 32

2.5 Installing the Card Reader...........................................................................................................................2- 32

2.5.1 Checking the Contents..........................................................................................................................2- 32

2.5.2 Installing the Card Reader-D1 .............................................................................................................2- 32

2.6 Installing the Voice Guidance Kit................................................................................................................2- 36

2.6.1 Checking Items in the Package...........................................................................................................2- 36

2.6.2 Turning Off the Host Machine..............................................................................................................2- 37

2.6.3 Installation Procedure ...........................................................................................................................2- 37

Chapter 3 Basic Operation

3.1 Construction.....................................................................................................................................................3- 1

3.1.1 Functional Construction ..........................................................................................................................3- 1

3.1.2 Wiring Diagram of the Major PCBs.......................................................................................................3- 2

3.1.3 Controlling the Main Motor (M1)............................................................................................................3- 3

3.2 Basic Sequence ..............................................................................................................................................3- 4

Contents

3.2.1 Basic Sequence of Operations (power-on)..........................................................................................3- 4

Chapter 4 Main Controller

4.1 Construction..................................................................................................................................................... 4- 1

4.1.1 Construction/Functions........................................................................................................................... 4- 1

4.2 Construction of the Electrical Circuitry ........................................................................................................4- 2

4.2.1 Main Controller PCB................................................................................................................................4-2

4.3 Start-Up Sequence......................................................................................................................................... 4- 3

4.3.1 Overview ...................................................................................................................................................4- 3

4.3.2 Start-Up Sequence.................................................................................................................................. 4- 3

4.3.3 Action to Take in Response to E602.................................................................................................... 4- 6

4.4 Shut-Down Sequence.................................................................................................................................... 4- 9

4.4.1 Flow of Operation .................................................................................................................................... 4- 9

4.5 Image Processing...........................................................................................................................................4- 9

4.5.1 Overview of the Image Flow .................................................................................................................. 4- 9

4.5.2 Configuration of the Image Processing Modules.............................................................................. 4- 10

4.5.3 Reader Input Image Processing.......................................................................................................... 4- 10

4.5.4 Compression/Expansion/Editing Block ..............................................................................................4- 11

4.5.5 Printer Output Image Processing........................................................................................................ 4- 11

4.6 Parts Replacement Procedure ................................................................................................................... 4- 12

4.6.1 Main Controller Box ...............................................................................................................................4- 12

4.6.2 Main Controller PCB.............................................................................................................................. 4- 13

4.6.3 SDRAM....................................................................................................................................................4- 16

4.6.4 Boot ROM................................................................................................................................................ 4- 16

4.6.5 HDD..........................................................................................................................................................4- 17

4.6.6 Video PCB...............................................................................................................................................4- 18

4.6.7 Reader I/F PCB ......................................................................................................................................4- 19

4.6.8 Controller Fan.........................................................................................................................................4- 20

Chapter 5 Original Exposure System

5.1 Construction..................................................................................................................................................... 5- 1

5.1.1 Specifications, Controls, and Functions <iR7105/7095>.................................................................. 5- 1

5.1.2 Specifications, Controls, and Functions <iR7086> ............................................................................5- 2

5.1.3 Major Components <iR7105/7095>...................................................................................................... 5- 2

5.1.4 Major Components <iR7086>................................................................................................................ 5- 4

5.1.5 Construction of the Control System <iR7105/7095>.......................................................................... 5- 5

5.1.6 Construction of the Control System <iR7086>....................................................................................5- 6

5.2 Basic Sequence..............................................................................................................................................5- 6

5.2.1 Basic Sequence of Operations <iR7105/7095>..................................................................................5- 6

5.2.2 Basic Sequence of Operations <iR7086>............................................................................................ 5- 6

5.2.3 Basic Sequence of Operation in Response to a Press on the Start Key <iR7105/7095>........... 5- 7

5.2.4 Basic Sequence of Operation in Response to a Press on the Start Key <iR7086>..................... 5- 7

5.3 Various Control ............................................................................................................................................... 5- 8

5.3.1 Controlling the Scanner Drive System..................................................................................................5- 8

5.3.1.1 Overview ............................................................................................................................................ 5- 8

5.3.1.2 Controlling the Scanner Motor <iR7105/7095> ........................................................................... 5- 8

5.3.1.3 Controlling the Scanner Motor <iR7086> .....................................................................................5- 9

Contents

5.3.2 Enlargement/Reduction.........................................................................................................................5- 10

5.3.2.1 Changing the Reproduction Ratio in Main Scanning Direction................................................5- 10

5.3.2.2 Changing the Reproduction Ratio in Sub Scanning Direction <iR7105/7095>.....................5- 10

5.3.2.3 Changing the Reproduction Ratio in Sub Scanning Direction <iR7086>...............................5- 10

5.3.3 Controlling the Scanning Lamp............................................................................................................5- 11

5.3.3.1 Overview <iR7105/7095>..............................................................................................................5- 11

5.3.3.2 Overview <iR7086>........................................................................................................................5- 11

5.3.3.3 Scanning Lamp................................................................................................................................5-12

5.3.3.4 Controlling the Activation...............................................................................................................5- 12

5.3.4 Detecting the Size of Originals.............................................................................................................5- 12

5.3.4.1 Overview...........................................................................................................................................5- 12

5.3.4.2 Points of Measurement Used for Original Size Identification...................................................5- 12

5.3.4.3 Overview of Operation <iR7105/7095>.......................................................................................5- 14

5.3.4.4 Overview of Operation <iR7086>.................................................................................................5- 15

5.3.5 Dirt Sensor Control.................................................................................................................................5- 17

5.3.5.1 Dust Detection in Stream Reading Mode <iR7105/7095> .......................................................5- 17

5.3.5.2 Dust Detection in Stream Reading Mode <iR7086>.................................................................5- 18

5.3.5.3 White Plate Dust Detection Control..............................................................................................5- 19

5.3.6 Image Processing...................................................................................................................................5- 20

5.3.6.1 Overview <iR7105/7095>..............................................................................................................5- 20

5.3.6.2 Overview <iR7086>........................................................................................................................5- 21

5.3.6.3 CCD Drive <iR7105/7095>............................................................................................................5- 22

5.3.6.4 CCD Drive <iR7086>......................................................................................................................5- 22

5.3.6.5 CCD Output Gain Correction, Offset Correction........................................................................5- 23

5.3.6.6 CCD Output A/D Conversion ........................................................................................................5- 23

5.3.6.7 Outline of Shading Correction.......................................................................................................5- 23

5.3.6.8 Shading Adjustment........................................................................................................................5- 23

5.3.6.9 Shading Correction.........................................................................................................................5- 23

5.4 Parts Replacement Procedure....................................................................................................................5- 24

5.4.1 CCD Unit..................................................................................................................................................5- 24

5.4.2 Copyboard glass.....................................................................................................................................5- 24

5.4.3 Standard White Plate.............................................................................................................................5- 26

5.4.4 Scanning Lamp.......................................................................................................................................5- 26

5.4.5 Reader Controller PCB..........................................................................................................................5- 29

5.4.6 Interface PCB..........................................................................................................................................5- 31

5.4.7 Inverter PCB............................................................................................................................................5- 33

5.4.8 Scanner Motor.........................................................................................................................................5- 33

5.4.9 ADF Open/Close Sensor.......................................................................................................................5- 35

5.4.10 Original Size Sensor ............................................................................................................................5- 36

5.4.11 Scanner Home Position Sensor.........................................................................................................5- 37

5.4.12 Cooling Fan ...........................................................................................................................................5- 39

5.4.13 Scanner Drive Cable............................................................................................................................5- 40

Chapter 6 Laser Exposure

6.1 Construction.....................................................................................................................................................6- 1

6.1.1 Outline of the Laser Exposure System.................................................................................................6- 1

6.2 Basic Sequence ..............................................................................................................................................6- 3

6.2.1 Basic Sequence of Operations (laser exposure system)...................................................................6- 3

Contents

6.3 Various Controls ............................................................................................................................................. 6- 3

6.3.1 Controlling the Laser Activation Timing................................................................................................6- 3

6.3.1.1 Turning On and Off the Laser Unit................................................................................................. 6- 3

6.3.1.2 Flow of the BD Signal....................................................................................................................... 6- 4

6.3.2 Controlling the Intensity of Laser Light ................................................................................................. 6- 5

6.3.2.1 APC Control....................................................................................................................................... 6- 5

6.3.3 Controlling the Laser Scanner Motor .................................................................................................... 6- 6

6.3.3.1 Outline ................................................................................................................................................ 6- 6

6.3.4 Controlling the Laser Shutter.................................................................................................................. 6- 7

6.3.4.1 Controlling the Laser Shutter.......................................................................................................... 6- 7

6.4 Parts Replacement Procedure ..................................................................................................................... 6- 8

6.4.1 Laser Scanner Unit .................................................................................................................................. 6- 8

Chapter 7 Image Formation

7.1 Construction..................................................................................................................................................... 7- 1

7.1.1 Outline ....................................................................................................................................................... 7- 1

7.1.2 Major Components.................................................................................................................................. 7- 1

7.1.3 Pre-Transfer Exposure LED...................................................................................................................7- 2

7.2 Image Formation Process............................................................................................................................. 7- 2

7.2.1 Overview ...................................................................................................................................................7- 2

7.3 Basic Sequence..............................................................................................................................................7- 3

7.3.1 Basic Sequence....................................................................................................................................... 7- 3

7.4 Potential Control ............................................................................................................................................. 7- 4

7.4.1 Outline ....................................................................................................................................................... 7- 4

7.4.2 Basics Sequence of Operations............................................................................................................ 7- 5

7.4.3 Determining the Optimum Grid Bias.....................................................................................................7- 6

7.4.4 Grid Bias Corrective Control.................................................................................................................. 7- 6

7.4.5 Determining the Optimum Laser Output.............................................................................................. 7- 7

7.4.6 Laser Output Corrective Control............................................................................................................ 7- 7

7.4.7 Determining the Optimum Developing Bias........................................................................................ 7- 8

7.4.8 Potential Control for Transparency Mode............................................................................................ 7- 9

7.4.9 Target Potential Correction in Each Mode......................................................................................... 7- 10

7.5 Charging Mechanism...................................................................................................................................7- 12

7.5.1 Primary Charging Mechanism.............................................................................................................. 7- 12

7.5.1.1 Outline .............................................................................................................................................. 7- 12

7.5.1.2 Primary Charging Assembly Cleaning Mechanism................................................................... 7- 13

7.5.1.3 Others...............................................................................................................................................7- 13

7.5.2 Dust-Collecting Roller Bias................................................................................................................... 7- 14

7.5.2.1 Outline .............................................................................................................................................. 7- 14

7.5.3 Pre-Transfer Charging Mechanism..................................................................................................... 7- 15

7.5.3.1 Outline .............................................................................................................................................. 7- 15

7.5.3.2 Controlling the Output to Suit the Environment (fuzzy control)............................................... 7- 16

7.5.3.3 Pre-Transfer Charging Assembly Cleaning Mechanism.......................................................... 7- 16

7.5.3.4 Others...............................................................................................................................................7- 17

7.6 Drum Cleaner Unit........................................................................................................................................ 7- 17

7.6.1 Outline ..................................................................................................................................................... 7- 17

7.6.2 Detecting the Waste Toner (case full condition)............................................................................... 7- 18

7.7 Developing Assembly...................................................................................................................................7- 19

Contents

7.7.1 Outline......................................................................................................................................................7- 19

7.7.2 Controlling the Developing Assembly.................................................................................................7- 20

7.7.3 Controlling the Toner Cartridge Drive Mechanism ...........................................................................7- 21

7.7.4 Controlling the Developing Bias...........................................................................................................7- 22

7.7.5 Detecting the Toner Level and Controlling the Toner Supply Mechanism ...................................7- 23

7.8 Transfer Mechanism.....................................................................................................................................7- 27

7.8.1 Transfer Guide Bias ...............................................................................................................................7- 27

7.8.1.1 Overview...........................................................................................................................................7- 27

7.8.1.2 Controlling the Output to Suit the Environment..........................................................................7- 28

7.8.2 Transfer Charging Mechanism.............................................................................................................7- 29

7.8.2.1 Outline...............................................................................................................................................7- 29

7.8.2.2 Controlling the Output to Suit the Environment (fuzzy control)................................................7- 30

7.8.2.3 Correcting the Output at the Trailing Edge of Paper.................................................................7- 30

7.8.2.4 Transfer Charging Assembly Cleaning Mechanism..................................................................7- 31

7.8.2.5 Others ...............................................................................................................................................7- 32

7.9 Separation Mechanism ................................................................................................................................7-33

7.9.1 Separation Charging Mechanism.........................................................................................................7- 33

7.9.1.1 Outline...............................................................................................................................................7- 33

7.9.1.2 Correcting the Output to Suit the Environment and the Toner Deposit..................................7- 34

7.9.1.3 Correcting the Output upon Detection of Leakage....................................................................7- 34

7.9.1.4 Others ...............................................................................................................................................7- 34

7.10 Parts Replacement Procedure..................................................................................................................7- 35

7.10.1 Process Unit..........................................................................................................................................7- 35

7.10.2 Pre-Exposure Lamp .............................................................................................................................7- 36

7.10.3 Primary Charging Assembly ...............................................................................................................7- 37

7.10.4 Pre-Transfer Charging Assembly.......................................................................................................7- 37

7.10.5 Photosensitive Drum............................................................................................................................7- 38

7.10.6 Drum Cleaner Unit................................................................................................................................7- 39

7.10.7 Photosensitive Drum Heater...............................................................................................................7- 40

7.10.8 Sub Hopper............................................................................................................................................7- 40

7.10.9 Developing Assembly ..........................................................................................................................7- 42

7.10.10 Developing Cylinder...........................................................................................................................7- 43

7.10.11 Developing Blade................................................................................................................................7-44

7.10.12 Developing Cylinder Deceleration Clutch.......................................................................................7- 45

7.10.13 Developing Cylinder Clutch...............................................................................................................7- 46

7.10.14 Transfer/Separation Charging Assembly........................................................................................7- 46

7.10.15 Pre-Transfer Exposure LED..............................................................................................................7- 47

7.10.16 Separation Claw/Separation Claw Drive Assembly......................................................................7- 47

7.10.17 Potential Sensor..................................................................................................................................7- 48

7.10.18 Dust-Collecting Roller........................................................................................................................7- 50

7.10.19 Charging Wire .....................................................................................................................................7- 50

Chapter 8 Pickup/Feeding System

8.1 Construction.....................................................................................................................................................8- 1

8.1.1 Specifications and Construction............................................................................................................8- 1

8.1.2 Arrangement of Rollers and Sensors....................................................................................................8- 1

8.1.3 Control System.........................................................................................................................................8- 2