Contents5.2.3Basic Sequence of Operation in Response to a Press on the Start Key (ADF mode; 1 original )............... 5- 85.3 Various Control ............................................................................................................................................... 5- 105.3.1 Controlling the Scanner Drive System...................................................................................................... 5- 105.3.1.1 Outline ............................................................................................................................................... 5- 105.3.1.2 Controlling the Reader Motor............................................................................................................ 5- 105.3.2 Contact Image Sensor (CIS)...................................................................................................................... 5- 125.3.2.1 Outline ............................................................................................................................................... 5- 125.3.2.2 Analog Control Inside the Contact Image Sensor ............................................................................. 5- 135.3.3 Enlargement/Reduction ............................................................................................................................. 5- 145.3.3.1 Changing the Magnification in Main Scanning Direction................................................................. 5- 145.3.3.2 Varying the Magnification in Sub Scanning Direction ..................................................................... 5- 145.3.4 Detecting the Size of Originals ................................................................................................................. 5- 165.3.4.1 Outline ............................................................................................................................................... 5- 165.3.4.2 Outline of Size Identification............................................................................................................. 5- 175.3.5 Dirt Sensor Control ................................................................................................................................... 5- 195.3.5.1 Outline ............................................................................................................................................... 5- 195.3.6 Image Processing....................................................................................................................................... 5- 225.3.6.1 Outline ............................................................................................................................................... 5- 225.3.6.2 CCD Drive ......................................................................................................................................... 5- 235.3.6.3 Gain Correction and Offset Correction of the CCD Output .............................................................. 5- 235.3.6.4 A/D Conversion of the CCD Output.................................................................................................. 5- 245.3.6.5 Shading Correction (outline) ............................................................................................................. 5- 245.3.6.6 Shading Adjustment........................................................................................................................... 5- 245.3.6.7 Shading Correction ............................................................................................................................ 5- 245.4 Parts Replacement Procedure .......................................................................................................................... 5- 265.4.1 Copyboard glass ........................................................................................................................................ 5- 265.4.1.1 Removing the Copyboard Glass ........................................................................................................ 5- 265.4.1.2 Removing the ADF Reading Glass.................................................................................................... 5- 265.4.2 Reader Controller PCB.............................................................................................................................. 5- 275.4.2.1 Before Replacing the Reader Controller PCB ................................................................................... 5- 275.4.2.2 Removing the Reader Rear Cover ..................................................................................................... 5- 275.4.2.3 Removing the rear cover of the machine ........................................................................................... 5- 275.4.2.4 Removing the flexible cable cover .................................................................................................... 5- 285.4.2.5 Removing the Copyboard Glass ........................................................................................................ 5- 285.4.2.6 Removing the Reader Controller PCB............................................................................................... 5- 295.4.2.7 After Replacing the Reader Controller PCB or After Initializing the RAM ..................................... 5- 315.4.3 Scanner Motor ........................................................................................................................................... 5- 325.4.3.1 Removing the Reader Rear Cover ..................................................................................................... 5- 325.4.3.2 Removing the Scanner Motor ............................................................................................................ 5- 325.4.4 Contact sensor ........................................................................................................................................... 5- 335.4.4.1 Removing the Reader Front Cover .................................................................................................... 5- 335.4.4.2 Removing the Reader Rear Cover ..................................................................................................... 5- 335.4.4.3 Removing the Copyboard Glass ........................................................................................................ 5- 345.4.4.4 Removing the Contact Image Sensor (CIS)....................................................................................... 5- 355.4.4.5 After Replacement of the CIS............................................................................................................ 5- 365.4.5 Copyboard Cover Open/Close Sensor....................................................................................................... 5- 365.4.5.1 Removing the Reader Rear Cover ..................................................................................................... 5- 365.4.5.2 Removing the Copyboard Cover Open/Closed Sensor (front/rear)................................................... 5- 375.4.6 Contact Sensor HP Sensor......................................................................................................................... 5- 37Download Free Service Manual And Resetter Printer at http://printer1.blogspot.com
