Canon iR8500 Service Manual page 41

CONTENTS
Contents
CHAPTER 1 INTRODUCTION
1 Features ............................................... 1-1
1.1 High-Speed,
High-Quality Images .................. 1-1
1.2 High Durability,
High Reliability ......................... 1-1
1.3 High-Performance Controller,
Large-Capacity Hard Disk for
High-Level Processing ............... 1-1
1.4 Ease of Use ................................ 1-1
1.5 Large Source of Paper ................ 1-1
1.6 Various Delivery Handling
(w/ accessories) .......................... 1-2
1.7 High-Level Printing
Functions Supporting Uses
on a Network .............................. 1-2
CHAPTER 2 NEW FUNCTION
1 Basic Construction .............................. 2-1
1.1 Functional Construction ............ 2-1
1.2 Inputs to the Major PCBs .......... 2-2
1.2.1 Wiring of the major PCBs ... 2-2
2 New Functions .................................... 2-3
2.1 Original Exposure System ......... 2-5
2.1.1 Changes in the Original
Exposure System ................. 2-5
2.1.2 Outline of the Original
Exposure System ................. 2-7
2.1.3 Enlargement/
Reduction Method ............... 2-7
2.1.4 Preventing Overheating of
the Scanner Motor ............... 2-8
2.1.5 Arrangement of the PCBs .... 2-9
2.1.6 Stabilizing the Scanning
Lamp .................................. 2-10
2.1.7 Detecting the State (open/
closed) of the DADF .......... 2-10
2.1.8 Detecting Dust in Stream
Reading Mode ................... 2-12
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COPYRIGHT© 2001 CANON INC.
2 Specifications ...................................... 1-3
2.1 Copier ......................................... 1-3
2.1.1 Type ..................................... 1-3
2.1.2 Methods ............................... 1-3
2.1.3 Functions ............................. 1-4
2.1.4 Others ................................ 1-10
2.2 Side Paper Deck-M1 ................ 1-13
3 Names of Parts .................................. 1-14
3.1 External View ........................... 1-14
3.2 Cross Section ........................... 1-16
4 Using the Machine ............................ 1-18
4.1 Power Switch ........................... 1-18
4.2 Control Panel ........................... 1-19
4.3 Special Features ....................... 1-20
4.4 User Mode ................................ 1-21
2.2 Image Processing System ........ 2-15
2.2.1 Changes to the Image
Processing System ............. 2-15
2.2.2 Outline of the Image
Processing System ............. 2-17
2.2.3 4-Channels High-speed
CCD ................................... 2-18
2.2.4 CCD Adjustment ............... 2-19
2.2.5 Analog Image
Processing .......................... 2-20
2.2.6 Digital Image Processing ... 2-21
2.2.7 Detecting the Orientation of
Originals ............................ 2-22
2.3 Laser Exposure System ............ 2-23
2.3.1 Changes in the Laser
Exposure System ............... 2-23
2.3.2 Outline of the Laser
Exposure System ............... 2-25
2.4 Image Formation System ......... 2-27
2.4.1 Changes in the Image
formation System ............... 2-27
CANON iR8500 REV.0 MAR. 2001