Parts Replacement Procedure - Canon iR4570 Series Service Manual

Contents
7.11 Photosensitive Drum Cleaning ....................................................................................................................... 7-24
7.11.1 Outline ..................................................................................................................................................... 7-24
7.11.2 Collection of Waste Toner....................................................................................................................... 7-24
7.11.3 Checking the Waste Toner Box ............................................................................................................... 7-24

7.12 Parts Replacement Procedure ......................................................................................................................... 7-26

7.12.1 Pre-Exposure Lamp ................................................................................................................................. 7-26
7.12.1.1 Removing the Front Cover Unit ....................................................................................................... 7-26
7.12.1.2 Removing the Waste Toner Case...................................................................................................... 7-26
7.12.1.3 Removing the Toner Cartridge ......................................................................................................... 7-27
7.12.1.4 Removing the Drum Unit ................................................................................................................. 7-28
7.12.1.5 Removing the Developing Assembly ............................................................................................... 7-30
7.12.1.6 Removing the Upper Tray ................................................................................................................ 7-33
7.12.1.7 Removing the Toner Cartridge Cover .............................................................................................. 7-34
7.12.1.8 Removing the Pre-Exposure Lamp................................................................................................... 7-34
7.12.2 Drum Unit ................................................................................................................................................ 7-35
7.12.2.1 Removing the Front Cover Unit ....................................................................................................... 7-35
7.12.2.2 Removing the Waste Toner Case...................................................................................................... 7-36
7.12.2.3 Removing the Drum Unit ................................................................................................................. 7-36
7.12.3 Hopper Assembly .................................................................................................................................... 7-38
7.12.3.1 Removing the Front Cover Unit ....................................................................................................... 7-38
7.12.3.2 Removing the Waste Toner Case...................................................................................................... 7-39
7.12.3.3 Removing the Toner Cartridge ......................................................................................................... 7-40
7.12.3.4 Removing the Drum Unit ................................................................................................................. 7-41
7.12.3.5 Removing the Developing Assembly ............................................................................................... 7-43
7.12.3.6 Removing the Upper Tray ................................................................................................................ 7-45
7.12.3.7 Removing the Toner Cartridge Cover .............................................................................................. 7-46
7.12.3.8 Removing the Pre-Exposure Lamp................................................................................................... 7-46
7.12.3.9 Removing the Left Cover ................................................................................................................. 7-47
7.12.3.10 Removing the Laser Unit................................................................................................................ 7-48
7.12.3.11 Removing the Hopper Assembly.................................................................................................... 7-50
7.12.4 Sub Hopper .............................................................................................................................................. 7-51
7.12.4.1 Removing the Front Cover Unit ....................................................................................................... 7-51
7.12.4.2 Removing the Waste Toner Case...................................................................................................... 7-52
7.12.4.3 Removing the Toner Cartridge ......................................................................................................... 7-53
7.12.4.4 Removing the Drum Unit ................................................................................................................. 7-54
7.12.4.5 Removing the Developing Assembly ............................................................................................... 7-56
7.12.4.6 Removing the Upper Tray ................................................................................................................ 7-58
7.12.4.7 Removing the Toner Cartridge Cover .............................................................................................. 7-59
7.12.4.8 Removing the Pre-Exposure Lamp................................................................................................... 7-59
7.12.4.9 Removing the Left Cover ................................................................................................................. 7-60
7.12.4.10 Removing the Laser Unit................................................................................................................ 7-61
7.12.4.11 Removing the Hopper Assembly.................................................................................................... 7-63
7.12.4.12 Removing the Toner Feedscrew Motor .......................................................................................... 7-64
7.12.4.13 Removing the Sub Hopper.............................................................................................................. 7-65
7.12.5 Developing Assembly.............................................................................................................................. 7-68
7.12.5.1 Removing the Front Cover Unit ....................................................................................................... 7-68
7.12.5.2 Removing the Waste Toner Case...................................................................................................... 7-69
7.12.5.3 Removing the Developing Assembly ............................................................................................... 7-70
7.12.6 Developing Cylinder................................................................................................................................ 7-72