Canon LBP6000 Series Service Manual page 8

Contents
2.3.4.2 Scanner Motor Fault Detection ................................................................................................................................................ 2- 8
2.3.4.3 Overview .................................................................................................................................................................................. 2- 9
2.3.4.4 Scanner Motor Fault Detection ................................................................................................................................................ 2- 9
2.4 IMAGE FORMATION SYSTEM................................................................................................................ 2- 10
2.4.1 Overview/Configuration..........................................................................................................................................2- 10
2.4.1.1 Overview ................................................................................................................................................................................ 2- 10
2.4.1.2 Print Process.......................................................................................................................................................................... 2- 10
2.4.1.3 Static Latent Image Formation Block ..................................................................................................................................... 2- 11
2.4.1.4 Development Block ................................................................................................................................................................ 2- 12
2.4.1.5 Transfer Block........................................................................................................................................................................ 2- 12
2.4.1.6 Fixing Block............................................................................................................................................................................ 2- 13
2.4.1.7 Drum Cleaning Block ............................................................................................................................................................. 2- 13
2.4.1.8 Overview ................................................................................................................................................................................ 2- 14
2.4.1.9 Print Process.......................................................................................................................................................................... 2- 14
2.4.1.10 Static Latent Image Formation Block ................................................................................................................................... 2- 15
2.4.1.11 Development Block .............................................................................................................................................................. 2- 16
2.4.1.12 Transfer Block ...................................................................................................................................................................... 2- 17
2.4.1.13 Fixing Block.......................................................................................................................................................................... 2- 17
2.4.1.14 Drum Cleaning Block ........................................................................................................................................................... 2- 18
2.4.2 High-Voltage Control..............................................................................................................................................2- 18
2.4.2.1 Overview ................................................................................................................................................................................ 2- 18
2.4.2.2 Generating Primary Charging Bias ........................................................................................................................................ 2- 19
2.4.2.3 Generating Developing Bias .................................................................................................................................................. 2- 19
2.4.2.4 Generating Transfer Bias....................................................................................................................................................... 2- 19
2.4.2.5 Overview ................................................................................................................................................................................ 2- 19
2.4.2.6 Generating Primary Charging Bias ........................................................................................................................................ 2- 20
2.4.2.7 Generating Developing Bias .................................................................................................................................................. 2- 20
2.4.2.8 Generating Transfer Bias....................................................................................................................................................... 2- 20
2.4.3 Toner Cartridge......................................................................................................................................................2- 20
2.4.3.1 Toner Level Detection............................................................................................................................................................ 2- 20
2.4.3.2 Toner Cartridge Absence/Presence Detection ...................................................................................................................... 2- 20
2.4.3.3 Toner Level Detection............................................................................................................................................................ 2- 22
2.4.3.4 Toner Cartridge Absence/Presence Detection ...................................................................................................................... 2- 22
2.5 PICKUP AND FEEDING SYSTEM........................................................................................................... 2- 23
2.5.1 Overview/Configuration..........................................................................................................................................2- 23
2.5.1.1 Overview ................................................................................................................................................................................ 2- 23
2.5.1.2 Overview ................................................................................................................................................................................ 2- 23
2.5.2 Detecting Jams ......................................................................................................................................................2- 24
2.5.2.1 Jam Detection Outline............................................................................................................................................................ 2- 24
2.5.2.2 Delay Jams ............................................................................................................................................................................ 2- 26
2.5.2.3 Stationary Jams ..................................................................................................................................................................... 2- 26
2.5.2.4 Other Jams ............................................................................................................................................................................ 2- 26
2.6 EXTERNAL AND CONTROLS SYSTEM ................................................................................................. 2- 27
2.6.1 Power Supply.........................................................................................................................................................2- 27
2.6.1.1 Power Supply......................................................................................................................................................................... 2- 27
2.6.1.2 Protective Functions .............................................................................................................................................................. 2- 29
2.7 ENGINE CONTROL SYSTEM ................................................................................................................. 2- 30
2.7.1 Main Controller.......................................................................................................................................................2- 30
2.7.1.1 General description................................................................................................................................................................ 2- 30
2.7.1.2 General description................................................................................................................................................................ 2- 31
2.7.2 Engine Controller ...................................................................................................................................................2- 31
2.7.2.1 General description................................................................................................................................................................ 2- 31
2.7.2.2 General description................................................................................................................................................................ 2- 33
2.8 FIXING UNIT/DELIVERY SYSTEM.......................................................................................................... 2- 34
2.8.1 Overview/Configuration..........................................................................................................................................2- 34
2.8.1.1 Overview ................................................................................................................................................................................ 2- 34
2.8.1.2 Main Parts of Fixing Unit........................................................................................................................................................ 2- 34
2.8.1.3 Overview ................................................................................................................................................................................ 2- 35
2.8.1.4 Main Parts of Fixing Unit........................................................................................................................................................ 2- 35
2.8.2 Various Control Mechanisms .................................................................................................................................2- 36