Canon imagerunner advance 4551i User manual

SERVICE
MANUAL
COPYRIGHT © 2016 CANON INC. CANON imageRUNNER ADVANCE 4500 Series Rev. 1 PRINTED IN U.S.A.
September 1, 2016
Rev. 1
imageRUNNER
ADVANCE
4551i/4545i
4535i/4525i

Introduction
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.
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 consent of Canon Inc.
Copyright CANON INC. 2016
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.
1x
Remove the claw.
Check visually.
1x
Insert the claw.
Check a sound. Push the part.
Introduction

Symbols Explanation Symbols Explanation
1x
Disconnect the connector. Connect the power cable.
1x
Connect the connector. Disconnect the power cable.
1x
Remove the cable/wire from the
cable guide or wire saddle.
Turn on the power.
1x
Install the cable/wire to the cable
guide or wire saddle.
Turn off the power.
1x
Remove the screw.
1x
Loosen the screw.
1x
Install the screw.
1x
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.
Introduction

Contents
Safety Precautions...............................................................................................1
Laser Safety........................................................................................................................................ 2
Handling of Laser System................................................................................................................... 2
Turn power switch ON.........................................................................................................................2
Power Supply...................................................................................................................................... 3
Toner Safety........................................................................................................................................3
About Toner..........................................................................................................................................3
Handling Adhered Toner........................................................................................................................3
Notes When Handling a Lithium Battery............................................................................................. 3
Notes Before it Works Serving............................................................................................................ 4
Points to Note at Cleaning...................................................................................................................4
Notes on Assembly/Disassembly........................................................................................................4
Points to Note when Tightening a Screw.................................................................................................5
1. Product Overview.............................................................................................6
Product Lineup.................................................................................................................................... 7
Host machine........................................................................................................................................7
Pickup/Delivery System Options............................................................................................................ 8
Scanning System Options......................................................................................................................9
Function Expansion System Options.................................................................................................... 10
Features............................................................................................................................................ 13
Product Features................................................................................................................................ 13
Toner Container..................................................................................................................................14
Setup Guide........................................................................................................................................14
Introduction of Situation Mode..............................................................................................................15
Specifications.................................................................................................................................... 16
Product Specifications......................................................................................................................... 16
Weight and Size..................................................................................................................................17
Productivity (Print speed).....................................................................................................................17
Paper type..........................................................................................................................................17
Name of Parts................................................................................................................................... 26
External View......................................................................................................................................26
Cross Section View............................................................................................................................. 30
Control Panel......................................................................................................................................32
2. Technology..................................................................................................... 33
Basic Configuration........................................................................................................................... 34
Functional Configuration......................................................................................................................34
Original Exposure System.................................................................................................................35
Overview............................................................................................................................................ 35
Reader Assembly................................................................................................................................46
ADF_Single pass ADF.........................................................................................................................51
ADF_Reversal ADF.............................................................................................................................63
Main Controller..................................................................................................................................78
Contents
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Overview............................................................................................................................................ 78
Startup Sequence............................................................................................................................... 81
Shutdown Sequence........................................................................................................................... 81
Motion Sensor.....................................................................................................................................82
Laser Exposure System.................................................................................................................... 83
Overview............................................................................................................................................ 83
Basic Sequence..................................................................................................................................84
Controlling the Laser Activation Timing.................................................................................................85
Controlling the Intensity of Laser Light.................................................................................................. 87
Controlling the Polygon Motor.............................................................................................................. 87
Controlling the Laser Shutter................................................................................................................87
Image Formation System.................................................................................................................. 89
Overview............................................................................................................................................ 89
Image Stabilization Control.................................................................................................................. 91
Drum Unit...........................................................................................................................................92
Developing Assembly..........................................................................................................................94
Toner cartridge................................................................................................................................... 96
Transfer Unit.....................................................................................................................................100
Waste toner container........................................................................................................................101
Fixing System..................................................................................................................................103
Overview.......................................................................................................................................... 103
Fixing temperature control................................................................................................................. 105
Standby temperature control.............................................................................................................. 106
Print temperature control....................................................................................................................107
Down sequence control..................................................................................................................... 109
Fixing pressure roller cleaning sequence............................................................................................ 111
Fixing film edge cooling control.......................................................................................................... 111
Paper loop amount control before fixing..............................................................................................111
Fixing pressure/pressure release control ............................................................................................112
Protection features............................................................................................................................ 113
Pickup/Feed System....................................................................................................................... 114
Overview.......................................................................................................................................... 114
Cassette Pickup Assembly.................................................................................................................119
Multi-Purpose Pickup Assembly......................................................................................................... 123
Fixing / Registration Assembly........................................................................................................... 125
Duplex / Delivery Assembly................................................................................................................126
Detecting Jams................................................................................................................................. 127
External Auxiliary System................................................................................................................129
Overview.......................................................................................................................................... 129
Power-saving Function...................................................................................................................... 130
Quick Startup....................................................................................................................................132
Heater control................................................................................................................................... 135
Fan Control.......................................................................................................................................135
Counter control................................................................................................................................. 138
Restricted function.............................................................................................................................140
3. Periodical Service........................................................................................ 142
Consumable Parts List.................................................................................................................... 143
Cleaning/Check/Adjustment Locations............................................................................................146
Contents
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