Canon iR8500 Service Manual

Also see for ImageRunner iR8500 Series: Function guide Servise manual Service manual Service manual

Contents

COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001 xiiiCONTENTS3.4 Sequence of Operations(original exposure) ................... 2-453.4.1 Book Mode, 1 Original,Copyboard Closed ............. 2-453.4.2 Book Mode, 1 Original,Copyboard Cover Open ..... 2-463.5 Enlargement/Reduction(zoom) ...................................... 2-473.5.1 Changing the ReproductionRatio in Main ScanningDirection ............................ 2-473.5.2 Changing the ReproductionRatio in Sub ScanningDirection ............................ 2-473.6 Scanner Drive System .............. 2-483.6.1 Outline ............................... 2-483.6.2 Controlling the ScannerMotor ................................. 2-493.7 Controlling the ScanningLamp (LA101) ......................... 2-513.7.1 Outline ............................... 2-513.7.2 Scanning Lamp .................. 2-513.7.3 Turning On/Offthe Lamp ............................ 2-513.7.4 Detecting an Error ............. 2-523.8 Detecting the Size ofOriginals ................................... 2-533.8.1 Outline ............................... 2-533.8.2 Points of Detection ............ 2-533.8.3 Outline of Detection .......... 2-533.9 Disassembly/Assembly(iR7200) ................................... 2-573.9.1 Removing the ReaderUnit .................................... 2-583.9.2 Removing the ScanningLamp .................................. 2-593.9.3 Points to NoteWhen Replacingthe Scanning Lamp ............ 2-603.9.4 After Replacingthe Scanning Lamp ............ 2-613.9.5 Removing the ScannerMotor ................................. 2-613.9.6 Mounting the ScannerMotor ................................. 2-623.9.7 Removing the ScannerSystem Drive Cable ........... 2-623.9.8 Routing the Scanner DriveCable .................................. 2-653.9.9 Positioning the No. 1/2Mirror Base ........................ 2-663.9.10 Removing the OriginalSize Sensor ........................ 2-683.9.11 Removingthe HP Sensor .................... 2-683.9.12 Removing the CopyboardCover Sensor ...................... 2-693.9.13 Removing the Fuse PCB ... 2-703.9.14 Removing the InverterPCB .................................... 2-714 Outline of the Image ProcessingSystem (iR8500) ............................... 2-734.1 Outline ..................................... 2-734.2 Changes to the ImageProcessing System ................... 2-744.3 4-Channels High-speedCCD ......................................... 2-754.4 CCD Adjustment ...................... 2-764.5 Analog Image Processing ........ 2-774.6 Digital Image Processing ......... 2-784.7 Detecting the Orientation ofOriginals ................................... 2-794.8 Disassembly/Assembly(iR8500) ................................... 2-804.8.1 CCD Unit ........................... 2-814.8.2 Hard Disk ........................... 2-835 Image Processing System(iR7200) ............................................ 2-865.1 Outline ..................................... 2-865.2 Analog Image Processing ........ 2-875.2.1 Outline ............................... 2-875.2.2 Driving the CCD ................ 2-875.2.3 Gain Correction and OffsetCorrection of the CCDOutput ................................ 2-885.2.4 A/D Conversion ofthe CCD Output ................. 2-88