Canon imageRUNNER 2270 Service Manual page 228

Contents
Chapter 7 Image Formation
7.1 Construction ............................................................................................................... 7-1
7.1.1 Specifications of the Image Formation System .................................................. 7-1
7.1.2 Major Components of the Image Formation System .......................................... 7-3
7.2 Image Formation Process........................................................................................... 7-4
7.2.1 Image Formation Process (outline) ..................................................................... 7-4
7.2.2 Image Formation Process (image formation)...................................................... 7-5
7.3 Basic Sequence .......................................................................................................... 7-6
7.3.1 Sequence of Operation (initial rotation).............................................................. 7-6
7.3.2 Sequence of Operation (initial rotation).............................................................. 7-7
7.3.3 Sequence of Operation (copying)........................................................................ 7-8
7.3.4 Sequence of Operation (copying) ....................................................................... 7-8
7.3.5 Sequence of Operation (last rotation) ................................................................. 7-9
7.3.6 Sequence of Operation (last rotation) ................................................................. 7-9
7.4 Image Stabilization Control ..................................................................................... 7-10
7.4.1 Overview........................................................................................................... 7-10
7.4.2 APVC Control................................................................................................... 7-11
7.4.3 ATVC Control................................................................................................... 7-12
7.5 Drum Unit ................................................................................................................ 7-12
7.5.1 Charging Mechanism ........................................................................................ 7-12
7.6 Drum Cleaner Unit................................................................................................... 7-14
7.6.1 Photosensitive Drum Cleaning.......................................................................... 7-14
7.7 Developing Unit....................................................................................................... 7-15
7.7.1 Controlling the Developing Bias....................................................................... 7-15
7.8 Toner Container ....................................................................................................... 7-16
7.8.1 Overview........................................................................................................... 7-16
7.8.2 Route of Toner Supply...................................................................................... 7-18
7.8.3 Controlling the Drive of the Toner Cartridge ................................................... 7-19
7.8.4 Toner Supply Control........................................................................................ 7-20
7.8.5 Recovery Sequence ........................................................................................... 7-21
7.8.6 Toner Level Detection ...................................................................................... 7-22
7.9 Transfer Unit............................................................................................................ 7-23
7.9.1 Outline of the Transfer Unit .............................................................................. 7-23
7.9.2 Controlling the Transfer Bias ............................................................................ 7-24
7.9.3 Cleaning ............................................................................................................ 7-25
7.9.4 Separation Mechanism ...................................................................................... 7-25
Contents