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

5.3.6.9 Shading Correction ......................................................................................................................... 5- 23

5.4 Parts Replacement Procedure.................................................................................................................... 5- 24

5.4.1 CCD Unit ..................................................................................................................................................5- 24

5.4.2 Copyboard glass ..................................................................................................................................... 5- 24

5.4.3 Standard White Plate .............................................................................................................................5- 26

5.4.4 Scanning Lamp .......................................................................................................................................5- 26

5.4.5 Reader Controller PCB ..........................................................................................................................5- 29

5.4.6 Interface PCB ..........................................................................................................................................5- 31

5.4.7 Inverter PCB ............................................................................................................................................5- 33

5.4.8 Scanner Motor......................................................................................................................................... 5- 33

5.4.9 ADF Open/Close Sensor ....................................................................................................................... 5- 35

5.4.10 Original Size Sensor ............................................................................................................................ 5- 36

5.4.11 Scanner Home Position Sensor ......................................................................................................... 5- 37

5.4.12 Cooling Fan ........................................................................................................................................... 5- 39

5.4.13 Scanner Drive Cable ............................................................................................................................ 5- 40

Chapter 6 Laser Exposure

6.1 Construction ..................................................................................................................................................... 6- 1

6.1.1 Outline of the Laser Exposure System ................................................................................................. 6- 1

6.2 Basic Sequence .............................................................................................................................................. 6- 3

6.2.1 Basic Sequence of Operations (laser exposure system)................................................................... 6- 3

Table of Contents