Contents5.3.2 Enlargement/Reduction ......................................................................................................................... 5- 105.3.2.1 Changing the Reproduction Ratio in Main Scanning Direction................................................ 5- 105.3.2.2 Changing the Reproduction Ratio in Sub Scanning Direction .....................5- 105.3.2.3 Changing the Reproduction Ratio in Sub Scanning Direction ............................... 5- 105.3.3 Controlling the Scanning Lamp ............................................................................................................5- 115.3.3.1 Overview .............................................................................................................. 5- 115.3.3.2 Overview ........................................................................................................................5- 115.3.3.3 Scanning Lamp................................................................................................................................5- 125.3.3.4 Controlling the Activation ...............................................................................................................5- 125.3.4 Detecting the Size of Originals .............................................................................................................5- 125.3.4.1 Overview........................................................................................................................................... 5- 125.3.4.2 Points of Measurement Used for Original Size Identification................................................... 5- 125.3.4.3 Overview of Operation ....................................................................................... 5- 145.3.4.4 Overview of Operation .................................................................................................5- 155.3.5 Dirt Sensor Control .................................................................................................................................5- 175.3.5.1 Dust Detection in Stream Reading Mode .......................................................5- 175.3.5.2 Dust Detection in Stream Reading Mode ................................................................. 5- 185.3.5.3 White Plate Dust Detection Control..............................................................................................5- 195.3.6 Image Processing ................................................................................................................................... 5- 205.3.6.1 Overview .............................................................................................................. 5- 205.3.6.2 Overview ........................................................................................................................5- 215.3.6.3 CCD Drive ............................................................................................................5- 225.3.6.4 CCD Drive ...................................................................................................................... 5- 225.3.6.5 CCD Output Gain Correction, Offset Correction ........................................................................5- 235.3.6.6 CCD Output A/D Conversion ........................................................................................................ 5- 235.3.6.7 Outline of Shading Correction .......................................................................................................5- 235.3.6.8 Shading Adjustment........................................................................................................................5- 235.3.6.9 Shading Correction ......................................................................................................................... 5- 235.4 Parts Replacement Procedure.................................................................................................................... 5- 245.4.1 CCD Unit ..................................................................................................................................................5- 245.4.2 Copyboard glass ..................................................................................................................................... 5- 245.4.3 Standard White Plate .............................................................................................................................5- 265.4.4 Scanning Lamp .......................................................................................................................................5- 265.4.5 Reader Controller PCB ..........................................................................................................................5- 295.4.6 Interface PCB ..........................................................................................................................................5- 315.4.7 Inverter PCB ............................................................................................................................................5- 335.4.8 Scanner Motor......................................................................................................................................... 5- 335.4.9 ADF Open/Close Sensor ....................................................................................................................... 5- 355.4.10 Original Size Sensor ............................................................................................................................ 5- 365.4.11 Scanner Home Position Sensor ......................................................................................................... 5- 375.4.12 Cooling Fan ........................................................................................................................................... 5- 395.4.13 Scanner Drive Cable ............................................................................................................................ 5- 40Chapter 6 Laser Exposure6.1 Construction ..................................................................................................................................................... 6- 16.1.1 Outline of the Laser Exposure System ................................................................................................. 6- 16.2 Basic Sequence .............................................................................................................................................. 6- 36.2.1 Basic Sequence of Operations (laser exposure system)................................................................... 6- 3
