Canon LBP6000 Series Service Manual page 31

Contents
2.1 Functional Configuration ...............................................................................................................................................2-1
2.1.1 Outline.......................................................................................................................................................................................... 2-1
2.1.2 Outline.......................................................................................................................................................................................... 2-1
2.2 Basic Sequence ..............................................................................................................................................................2-1
2.2.1 Basic Sequence of Operation ....................................................................................................................................................... 2-1
2.2.2 Power-On Sequence..................................................................................................................................................................... 2-2
2.2.3 Basic Sequence of Operation ....................................................................................................................................................... 2-2
2.2.4 Power-On Sequence..................................................................................................................................................................... 2-2
2.3 LASER EXPOSURE SYSTEM.....................................................................................................................................2-3
2.3.1 Overview/Configuration .............................................................................................................................................................. 2-3
2.3.1.1 Overview .........................................................................................................................................................................................................2-3
2.3.1.2 Overview .........................................................................................................................................................................................................2-4
2.3.2 Controlling the Laser Activation Timing..................................................................................................................................... 2-4
2.3.2.1 Laser ON/OFF Control ...................................................................................................................................................................................2-4
2.3.2.2 Horizontal Sync Control .................................................................................................................................................................................2-5
2.3.2.3 Laser ON/OFF Control ...................................................................................................................................................................................2-6
2.3.2.4 Horizontal Sync Control .................................................................................................................................................................................2-6
2.3.3 Laser Control ............................................................................................................................................................................... 2-7
2.3.3.1 Auto Power Control (APC) .............................................................................................................................................................................2-7
2.3.3.2 Auto Power Control (APC) .............................................................................................................................................................................2-7
2.3.4 Laser Scanner Motor Control....................................................................................................................................................... 2-7
2.3.4.1 Overview .........................................................................................................................................................................................................2-7
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
Contents