Canon imageRUNNER 7095 Service Manual page 117

Contents
5.1 Construction..................................................................................................................................................... 5- 1
5.1.1 Specifications, Controls, and Functions <iR7105/7095> .................................................................. 5- 1
5.1.2 Specifications, Controls, and Functions <iR7086> ............................................................................ 5- 2
5.1.3 Major Components <iR7105/7095>...................................................................................................... 5- 2
5.1.4 Major Components <iR7086>................................................................................................................ 5- 4
5.1.5 Construction of the Control System <iR7105/7095>.......................................................................... 5- 5
5.1.6 Construction of the Control System <iR7086>.................................................................................... 5- 6
5.2 Basic Sequence .............................................................................................................................................. 5- 6
5.2.1 Basic Sequence of Operations <iR7105/7095>.................................................................................. 5- 6
5.2.2 Basic Sequence of Operations <iR7086>............................................................................................ 5- 6
5.2.3 Basic Sequence of Operation in Response to a Press on the Start Key <iR7105/7095> ........... 5- 7
5.2.4 Basic Sequence of Operation in Response to a Press on the Start Key <iR7086> ..................... 5- 7
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 <iR7105/7095> ........................................................................... 5- 8
5.3.1.3 Controlling the Scanner Motor <iR7086> ..................................................................................... 5- 9
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 <iR7105/7095> .................... 5- 10
5.3.2.3 Changing the Reproduction Ratio in Sub Scanning Direction <iR7086> .............................. 5- 10
5.3.3 Controlling the Scanning Lamp ............................................................................................................ 5- 11
5.3.3.1 Overview <iR7105/7095> .............................................................................................................. 5- 11
5.3.3.2 Overview <iR7086> ........................................................................................................................ 5- 11
5.3.3.3 Scanning Lamp ............................................................................................................................... 5- 12
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 <iR7105/7095>....................................................................................... 5- 14
5.3.4.4 Overview of Operation <iR7086>................................................................................................. 5- 15
5.3.5 Dirt Sensor Control................................................................................................................................. 5- 17
5.3.5.1 Dust Detection in Stream Reading Mode <iR7105/7095> ....................................................... 5- 17
5.3.5.2 Dust Detection in Stream Reading Mode <iR7086> ................................................................. 5- 18
5.3.5.3 White Plate Dust Detection Control ............................................................................................. 5- 19
5.3.6 Image Processing................................................................................................................................... 5- 20
5.3.6.1 Overview <iR7105/7095> .............................................................................................................. 5- 20
5.3.6.2 Overview <iR7086> ........................................................................................................................ 5- 21
5.3.6.3 CCD Drive <iR7105/7095> ........................................................................................................... 5- 22
5.3.6.4 CCD Drive <iR7086> ..................................................................................................................... 5- 22
5.3.6.5 CCD Output Gain Correction, Offset Correction........................................................................ 5- 23
5.3.6.6 CCD Output A/D Conversion ........................................................................................................ 5- 23
5.3.6.7 Outline of Shading Correction....................................................................................................... 5- 23
5.3.6.8 Shading Adjustment ....................................................................................................................... 5- 23
Contents