
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