ContentsChapter 5 Original Exposure System5.1 Construction ...................................................................................................................................................................5-15.1.1 Specifications, Control Mechanisms, and Functions ................................................................................................................... 5-15.1.2 Major Components....................................................................................................................................................................... 5-15.1.3 Construction of the Control System............................................................................................................................................. 5-35.1.4 Reader Controller PCB ................................................................................................................................................................ 5-35.2 Basic Sequence ..............................................................................................................................................................5-45.2.1 Basic Sequence of Operation at Power-On.................................................................................................................................. 5-45.2.2 Basic Sequence of Operation in Response to a Press on the Start Key ....................................................................................... 5-45.3 Various Control Mechanisms.........................................................................................................................................5-65.3.1 Controlling the Scanner Drive System ........................................................................................................................................ 5-65.3.1.1 Overview .........................................................................................................................................................................................................5-65.3.1.2 Controlling the Scanner Motor........................................................................................................................................................................5-65.3.2 Enlargement/Reduction................................................................................................................................................................ 5-75.3.2.1 Changing the Magnification in Main Scanning Direction ..............................................................................................................................5-75.3.2.2 Changing the Magnification in Sub Scanning Direction ................................................................................................................................5-75.3.3 Controlling the Scanning Lamp ................................................................................................................................................... 5-75.3.3.1 Overview .........................................................................................................................................................................................................5-75.3.3.2 Scanning Lamp................................................................................................................................................................................................5-85.3.3.3 Turning On and Off the Scanning Lamp.........................................................................................................................................................5-85.3.4 Detecting the Size of Originals .................................................................................................................................................... 5-85.3.4.1 Identifying the Size of Originals .....................................................................................................................................................................5-85.3.4.2 Points of Measurement Used for Original Size Identification ........................................................................................................................5-85.3.4.3 Overview of Operation..................................................................................................................................................................................5-105.3.5 Dirt Sensor Control .................................................................................................................................................................... 5-115.3.5.1 Dust Detection Control at Stream Reading ...................................................................................................................................................5-115.3.5.2 White Plate Dust Detection Control..............................................................................................................................................................5-125.3.6 Image Processing ....................................................................................................................................................................... 5-135.3.6.1 Overview .......................................................................................................................................................................................................5-135.3.6.2 CCD Drive ....................................................................................................................................................................................................5-145.3.6.3 CCD Gain Correction, Offset Correction......................................................................................................................................................5-155.3.6.4 CCD Output A/D Conversion .......................................................................................................................................................................5-155.3.6.5 Outline of Shading Correction ......................................................................................................................................................................5-155.3.6.6 Shading Adjustment ......................................................................................................................................................................................5-155.3.6.7 Shading Correction........................................................................................................................................................................................5-155.4 Parts Replacement Procedure.......................................................................................................................................5-165.4.1 DADF......................................................................................................................................................................................... 5-165.4.1.1 Removing the DADF (imagePRESS C1 Series/imagePRESS C7000 Series)..............................................................................................5-165.4.2 Copyboard Glass ........................................................................................................................................................................ 5-165.4.2.1 Removing the Copyboard Glass (imagePRESS C1 Series/imagePRESS C7000 Series).............................................................................5-165.4.2.2 Scanner Parts Replacement Procedure (imagePRESS C1 Series/imagePRESS C7000 Series) ...................................................................5-165.4.3 Replacement of Standard White Plate ....................................................................................................................................... 5-165.4.3.1 Removing the Standard White Plate (imagePRESS C1 Series/imagePRESS C7000 Series) ......................................................................5-165.4.3.2 Scanner Parts Replacement Procedure (imagePRESS C1 Series/imagePRESS C7000 Series) ...................................................................5-175.4.4 Exposure Lamp .......................................................................................................................................................................... 5-175.4.4.1 Preparation for Removing the Scanner Lamp (imagePRESS C1 Series/imagePRESS C7000 Series) ........................................................5-175.4.4.2 Removing the Scanner Lamp (imagePRESS C1 Series) ..............................................................................................................................5-175.4.4.3 Removing the Scanner Lamp (imagePRESS C1 Series) ..............................................................................................................................5-195.4.4.4 Removing the Scanner Lamp (imagePRESS C7000 Series) ........................................................................................................................5-215.4.5 Reader Controller PCB .............................................................................................................................................................. 5-245.4.5.1 Preparation for Removing the Reader Controller PCB (imagePRESS C1 Series/imagePRESS C7000 Series) ..........................................5-245.4.5.2 Removing the Reader Controller PCB (imagePRESS C1 Series) ................................................................................................................5-245.4.5.3 Removing the Reader Controller PCB (imagePRESS C7000 Series) ..........................................................................................................5-255.4.5.4 Procedure after Replacement of the Reader Controller PCB (imagePRESS C1 Series/imagePRESS C7000 Series) .................................5-27
