佳能iR-ADVC7500III系列c7570iiiic7580iiii彩色复印机维修手册（英文版）

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维修手册

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Revision 2.0

imageRUNNER ADVANCE

C7500 III Series

Service Manual

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Important Notices

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.

The copyright of this document belongs to Canon Inc. This document may not be copied, reproduced or translated into another

language, in whole or in part, without the prior consent of Canon Inc.

Caution

Use of this manual should be strictly supervised to avoid disclosure of confidential information.

Explanation of Symbols

The following symbols are used throughout this Service Manual.

Symbols Explanation Symbols Explanation

Check.

Remove the claw.

Check visually.

Insert the claw.

Important Notices

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Symbols Explanation Symbols Explanation

Check a sound. Push the part.

Disconnect the connector. Connect the power cable.

Connect the connector. Disconnect the power cable.

Remove the cable/wire from the

cable guide or wire saddle.

Turn on the power.

Install the cable/wire to the cable

guide or wire saddle.

Turn off the power.

Remove the screw.

Loosen the screw.

Install the screw.

Tighten the screw.

Cleaning is needed. Measurement is needed.

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 reference 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, however, 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 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.

Important Notices

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Contents

Safety Precautions...............................................................................................1

Laser Safety........................................................................................................................................

Handling of Laser System................................................................................................................... 2

Turn power switch ON.........................................................................................................................3

Power Supply...................................................................................................................................... 3

Toner Safety........................................................................................................................................3

About Toner..........................................................................................................................................3

Handling Adhered Toner........................................................................................................................3

Notes When Handling a Lithium Battery............................................................................................. 4

Notes Before it Works Serving ........................................................................................................... 4

Points to Note at Cleaning...................................................................................................................4

Notes on Assembly/Disassembly........................................................................................................4

1. Product Overview.............................................................................................6

Product Lineup.................................................................................................................................... 7

Host machine........................................................................................................................................7

Option.................................................................................................................................................. 8

Features............................................................................................................................................ 12

Product Features................................................................................................................................ 12

Specifications.................................................................................................................................... 13

Product Specifications......................................................................................................................... 13

Fax Specifications...............................................................................................................................14

Weight and Size..................................................................................................................................15

Productivity.........................................................................................................................................15

Paper type..........................................................................................................................................23

Parts Name....................................................................................................................................... 36

External Cover....................................................................................................................................36

2. Technology..................................................................................................... 42

Basic Configuration........................................................................................................................... 43

Functional Configuration......................................................................................................................43

Original Exposure System.................................................................................................................44

Overview............................................................................................................................................ 44

Basic configuration..............................................................................................................................46

Controls..............................................................................................................................................64

Controller System............................................................................................................................106

Overview.......................................................................................................................................... 106

Motion Sensor...................................................................................................................................109

Shutdown Sequence......................................................................................................................... 110

Startup Sequence..............................................................................................................................110

Laser Exposure System.................................................................................................................. 112

Overview.......................................................................................................................................... 112

Characteristics.................................................................................................................................. 114

Specifications....................................................................................................................................115

Contents

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Parts Configuration............................................................................................................................116

Laser ON Timing Control................................................................................................................... 117

Laser Beam Intensity Control............................................................................................................. 119

Duplex print magnification correction.................................................................................................. 120

Laser Scanner Motor Control............................................................................................................. 121

Control to Turn OFF Laser (Safety of Laser)........................................................................................121

Image Formation System

................................................................................................................ 123

Overview.......................................................................................................................................... 123

Specifications....................................................................................................................................126

Parts Configuration............................................................................................................................127

Drive Configuration............................................................................................................................132

Bias Types........................................................................................................................................136

Print Process.................................................................................................................................... 138

Process Unit (Bk).............................................................................................................................. 140

Process Unit (CL)..............................................................................................................................150

Transfer Assembly............................................................................................................................ 157

Toner Supply Area............................................................................................................................ 167

Waste Toner Feed Unit......................................................................................................................176

Drum Unit / Developing Unit...............................................................................................................178

Image Stabilization Control................................................................................................................ 181

Fixing System..................................................................................................................................196

Overview.......................................................................................................................................... 196

Features...........................................................................................................................................196

Specifications....................................................................................................................................197

Parts Configuration............................................................................................................................198

Drive Configuration............................................................................................................................200

Fixing Temperature Control................................................................................................................201

Outer Core shift control......................................................................................................................204

Fixing cleaning control.......................................................................................................................204

Fixing Film (non paper-feed area) Temperature Rise Prevention Control...............................................204

Paper Dust Removal Control..............................................................................................................205

Paper Wrapping Prevention Control....................................................................................................205

Fixing Film Scratch Prevention Control............................................................................................... 206

Down Sequence................................................................................................................................207

Pressure Roller Cooling Control......................................................................................................... 208

Fixing Film Unit Engagement/Disengagement Control......................................................................... 209

Fixing Assembly detection................................................................................................................. 209

Detection of New Fixing Film Unit.......................................................................................................210

Fixing Film Unit Life Detection............................................................................................................210

Protection Function........................................................................................................................... 211

Pickup Feed System....................................................................................................................... 213

Overview.......................................................................................................................................... 213

Specifications....................................................................................................................................214

Drive Configuration............................................................................................................................217

Paper Path........................................................................................................................................218

Deck/Cassette Pickup Unit.................................................................................................................218

Multi-purpose Tray Pickup Unit...........................................................................................................225

Registration Unit................................................................................................................................228

Pre-fixing Feed Unit...........................................................................................................................231

Delivery Unit..................................................................................................................................... 232

Reverse Unit.....................................................................................................................................234

Contents