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Service Manual
iR4570/3570, 2870/2270 Series
Oct 8 2004
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Application This manual has been issued by Canon Inc. for qualified persons to learn technical theory, installation, maintenance, and repair of products. This manual covers all localities where the products are sold. For this reason, there may be information in this manual that does not apply to your locality. Corrections This manual may contain technical inaccuracies or typographical errors due to improvements or changes in products. When changes occur in applicable products or in the contents
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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 outl
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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 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
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Conte nts Contents Chapter 1 Introduction 1.1 System Construction.......................................................................................................................................... 1- 1 1.1.1Overview of the System with a Delivery Accessory................................................................................... 1- 1 1.1.2Delivery Accessory System Configuration 1 .............................................................................................. 1- 1 1.
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C ont ent s 1.2.7.1 Printing Speed....................................................................................................................................1- 46 1.2.7.2 Printing Speed....................................................................................................................................1- 48 1.2.7.3 Types of Paper ...................................................................................................................................1- 49 Chapter
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Conte nts 4.1 Construction ...................................................................................................................................................... 4- 1 4.1.1Construction and Mechanisms .................................................................................................................... 4- 1 4.2 Construction of the Electrical Circuitry ............................................................................................................ 4- 3 4.2
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C ont ent s 5.2.3Basic Sequence of Operation in Response to a Press on the Start Key (ADF mode; 1 original )...............5- 8 5.3 Various Control ...............................................................................................................................................5- 10 5.3.1 Controlling the Scanner Drive System......................................................................................................5- 10 5.3.1.1 Outline .....................................
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Conte nts 5.4.6.1 Removing the Copyboard Glass........................................................................................................ 5- 37 5.4.6.2 Removing the ADF Reading Glass ................................................................................................... 5- 38 5.4.6.3 Removing the Contract Sensor Home Position Sensor ..................................................................... 5- 39 5.4.7 Original Size Sensor .....................................
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C ont ent s 7.3.4Sequence of Operation (copying) ................................................................................................................7- 8 7.3.5Sequence of Operation (last rotation) ..........................................................................................................7- 8 7.3.6Sequence of Operation (last rotation) ..........................................................................................................7- 9 7.4 Image Stabilization Co
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Conte nts 7.12.2.1 Removing the Front Cover Unit...................................................................................................... 7- 31 7.12.2.2 Removing the Waste Toner Case .................................................................................................... 7- 31 7.12.2.3 Removing the Drum Unit ................................................................................................................ 7- 32 7.12.3 Hopper Assembly........................
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C ont ent s 7.12.9.9 Removing the Left Cover ................................................................................................................7- 61 7.12.9.10 Removing the Laser Unit...............................................................................................................7- 61 7.12.9.11 Removing the Hopper Assembly...................................................................................................7- 62 7.12.9.12 Removing the Toner Level Sensor ..
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Conte nts 8.3.3.1 Door Open Jam.................................................................................................................................. 8- 25 8.4 Cassette Pick-Up Unit ..................................................................................................................................... 8- 26 8.4.1Overview ................................................................................................................................................... 8- 2
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C ont ent s 8.8.5.4 Removing the Cassette Pickup Motor 1 ............................................................................................8- 74 8.8.6 Cassette Pick-up Motor 2 ..........................................................................................................................8- 74 8.8.6.1 Removing the Rear Cover..................................................................................................................8- 74 8.8.6.2 Removing the Right Cover (r
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Conte nts 8.8.12.1 Removing the Right Cover (rear).................................................................................................... 8- 98 8.8.12.2 Removing the Right Door ............................................................................................................... 8- 98 8.8.12.3 Removing the Right Door ............................................................................................................... 8- 99 8.8.12.4 Removing the Right Cover (lower
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C ont ent s 8.8.19.3 Removing the Main Drive Assembly ............................................................................................8- 125 8.8.19.4 Removing the Registration Clutch.................................................................................................8- 126 8.8.20 Feeding Roller .......................................................................................................................................8- 126 8.8.20.1 Removing the Pickup Roller/Fe
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Conte nts 9.1.1Specifications, Control Mechanisms, and Functions .................................................................................. 9- 1 9.1.2Major Components ...................................................................................................................................... 9- 1 9.2 Basic Sequence.................................................................................................................................................. 9- 3 9.2.1Power-On S
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C ont ent s 9.5.5 Internal Delivery Sensor............................................................................................................................9- 26 9.5.5.1 Removing the Inside Delivery Cover Unit ........................................................................................9- 26 9.5.5.2 Removing the Grounding Plate..........................................................................................................9- 26 9.5.5.3 Removing the Fixing Film Cover
