Canon imagerunner C5180 Service Manual page 240

Contents
9.1 Construction ....................................................................................................... 9-1
9.1.1 Specifications, Control Mechanisms, and Functions............................................ 9-1
9.1.2 Major Components of the Image Formation System............................................ 9-3
9.1.3 Charging Specifications ............................................................................................ 9-4
9.2 Image Formation Process................................................................................ 9-7
9.2.1 Image Formation Process (general) ....................................................................... 9-7
9.2.2 Image Formation Process (image formation) ........................................................ 9-8
9.2.3 Image Formation Process (transfer) ....................................................................... 9-9
9.3 Basic Sequence............................................................................................... 9-10
9.3.1 At Power-On (1) ....................................................................................................... 9-10
9.3.2 At Power-On (2) ....................................................................................................... 9-11
9.3.3 During Copying/Printing Operations (normal speed) ......................................... 9-12
9.3.4 Making Copies/Prints (half speed) ........................................................................ 9-13
9.3.5 After Replacing the Drum Unit (D-UNIT).............................................................. 9-14
9.3.6 Printing Originals Containing a Color Page ......................................................... 9-15
9.4 Driving and Controlling the Image Formation System .............................. 9-16
9.4.1 Driving and Controlling the Image Formation System and the High-Voltage System
9-16
9.5 Image Stabilization Control............................................................................ 9-18
9.5.1 Outline of Image Quality Control ........................................................................... 9-18
9.5.2 Automated Image Stabilization Control ................................................................ 9-18
9.5.3 ATR Control .............................................................................................................. 9-22
9.5.4 Discharge Current Level Control ........................................................................... 9-23
9.5.5 ATVC Control (transfer bias level correction)...................................................... 9-23
9.5.6 PASCAL Control (image gradation) ...................................................................... 9-24
9.5.7 SALT-Dmax Control (development characteristics correction)......................... 9-25
9.5.8 SALT-Dhalf Control (development characteristics correction).......................... 9-26
9.5.9 Auto Gradation Control ........................................................................................... 9-27
9.6 Drum Unit ......................................................................................................... 9-29
9.6.1 Outline of the Drum Unit .........................................................................................9-29
9.6.1.1 Outline of the Drum Unit.................................................................................................... 9-29
9.6.1.2 Drum Receptacle Presence / Absence Detection ......................................................... 9-29
9.6.1.3 Drum Unit (D-UNIT) Drive Control ................................................................................... 9-30
9.6.2 Developing Assembly ..............................................................................................9-31
9.6.2.1 Construction of the Developing Assembly...................................................................... 9-31
9.6.2.2 Controlling the Developing Bias ....................................................................................... 9-32
9.6.3 Auxiliary Brush ..........................................................................................................9-34
Contents