Canon iR7086 Series Service Manual page 10

Contents
4.6.4.1 Making Preparations .............................................................................................................................................................. 4- 18
4.6.4.2 Removing the Boot ROM ....................................................................................................................................................... 4- 18
4.6.4.3 Removing the Boot ROM (up graded version)....................................................................................................................... 4- 18
4.6.5 HDD .......................................................................................................................................................................4- 18
4.6.5.1 Points to Note on Handling the Hard Disk ............................................................................................................................. 4- 18
4.6.5.2 Making Preparations .............................................................................................................................................................. 4- 18
4.6.5.3 Removing the Hard Disk ........................................................................................................................................................ 4- 18
4.6.5.4 Removing the Hard Disk(up graded version)......................................................................................................................... 4- 19
4.6.5.5 Points to Note When Mounting the Hard Disk ....................................................................................................................... 4- 19
4.6.5.6 After Replacing the Hard Disk................................................................................................................................................ 4- 19
4.6.6 Video PCB .............................................................................................................................................................4- 19
4.6.6.1 Making Preparations .............................................................................................................................................................. 4- 19
4.6.6.2 Removing the Video PCB ...................................................................................................................................................... 4- 20
4.6.7 Reader I/F PCB......................................................................................................................................................4- 20
4.6.7.1 Making Preparations .............................................................................................................................................................. 4- 20
4.6.7.2 Removing the Reader I/F PCB .............................................................................................................................................. 4- 21
4.6.8 Controller Fan ........................................................................................................................................................4- 21
4.6.8.1 Making Preparations .............................................................................................................................................................. 4- 21
4.6.8.2 Removing the Controller Fan ................................................................................................................................................. 4- 22
Chapter 5 Original Exposure System
5.1 Construction ............................................................................................................................................... 5- 1
5.1.1 Specifications, Controls, and Functions...................................................................................................................5- 1
5.1.2 Specifications, Controls, and Functions...................................................................................................................5- 2
5.1.3 Major Components...................................................................................................................................................5- 3
5.1.4 Major Components...................................................................................................................................................5- 4
5.1.5 Construction of the Control System .........................................................................................................................5- 6
5.1.6 Construction of the Control System .........................................................................................................................5- 6
5.2 Basic Sequence ......................................................................................................................................... 5- 7
5.2.1 Basic Sequence of Operations ................................................................................................................................5- 7
5.2.2 Basic Sequence of Operations ................................................................................................................................5- 7
5.2.3 Basic Sequence of Operation in Response to a Press on the Start Key .................................................................5- 7
5.2.4 Basic Sequence of Operation in Response to a Press on the Start Key .................................................................5- 8
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 ................................................................................................................................................. 5- 9
5.3.1.3 Controlling the Scanner Motor ............................................................................................................................................... 5- 10
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 ............................................................................................... 5- 11
5.3.2.3 Changing the Reproduction Ratio in Sub Scanning Direction ............................................................................................... 5- 11
5.3.3 Controlling the Scanning Lamp..............................................................................................................................5- 11
5.3.3.1 Overview ................................................................................................................................................................................ 5- 11
5.3.3.2 Overview ................................................................................................................................................................................ 5- 11
5.3.3.3 Scanning Lamp ...................................................................................................................................................................... 5- 11
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 ........................................................................................................................................................... 5- 14
5.3.4.4 Overview of Operation ........................................................................................................................................................... 5- 15
5.3.5 Dirt Sensor Control ................................................................................................................................................5- 16
5.3.5.1 Dust Detection in Stream Reading Mode............................................................................................................................... 5- 16
5.3.5.2 Dust Detection in Stream Reading Mode............................................................................................................................... 5- 17
5.3.5.3 White Plate Dust Detection Control ....................................................................................................................................... 5- 18
5.3.6 Image Processing ..................................................................................................................................................5- 19
5.3.6.1 Overview ................................................................................................................................................................................ 5- 19