Canon iR4570 Series Service Manual page 14

Contents
7.12.4.1 Removing the Front Cover Unit ...................................................................................................... 7- 40
7.12.4.2 Removing the Waste Toner Case..................................................................................................... 7- 40
7.12.4.3 Removing the Toner Cartridge ........................................................................................................ 7- 41
7.12.4.4 Removing the Drum Unit ................................................................................................................ 7- 42
7.12.4.5 Removing the Developing Assembly .............................................................................................. 7- 43
7.12.4.6 Removing the Upper Tray ............................................................................................................... 7- 44
7.12.4.7 Removing the Toner Cartridge Cover ............................................................................................. 7- 44
7.12.4.8 Removing the Pre-Exposure Lamp.................................................................................................. 7- 45
7.12.4.9 Removing the Left Cover ................................................................................................................ 7- 45
7.12.4.10 Removing the Laser Unit............................................................................................................... 7- 45
7.12.4.11 Removing the Hopper Assembly................................................................................................... 7- 46
7.12.4.12 Removing the Toner Feedscrew Motor ......................................................................................... 7- 47
7.12.4.13 Removing the Sub Hopper............................................................................................................. 7- 48
7.12.5 Developing Assembly ............................................................................................................................. 7- 49
7.12.5.1 Removing the Front Cover Unit ...................................................................................................... 7- 49
7.12.5.2 Removing the Waste Toner Case..................................................................................................... 7- 50
7.12.5.3 Removing the Developing Assembly .............................................................................................. 7- 50
7.12.6 Developing Cylinder ............................................................................................................................... 7- 52
7.12.6.1 Removing the Developing Cylinder ................................................................................................ 7- 52
7.12.7 Transfer Charging Roller ........................................................................................................................ 7- 54
7.12.7.1 Removing the Transfer Roller ......................................................................................................... 7- 54
7.12.8 Waste Toner Box..................................................................................................................................... 7- 55
7.12.8.1 Removing the Front Cover Unit ...................................................................................................... 7- 55
7.12.8.2 Removing the Waste Toner Case..................................................................................................... 7- 55
7.12.9 Toner Level Sensor ................................................................................................................................. 7- 56
7.12.9.1 Removing the Front Cover Unit ...................................................................................................... 7- 56
7.12.9.2 Removing the Waste Toner Case..................................................................................................... 7- 56
7.12.9.3 Removing the Toner Cartridge ........................................................................................................ 7- 57
7.12.9.4 Removing the Drum Unit ................................................................................................................ 7- 57
7.12.9.5 Removing the Developing Assembly .............................................................................................. 7- 58
7.12.9.6 Removing the Upper Tray ............................................................................................................... 7- 60
7.12.9.7 Removing the Toner Cartridge Cover ............................................................................................. 7- 60
7.12.9.8 Removing the Pre-Exposure Lamp.................................................................................................. 7- 60
7.12.9.9 Removing the Left Cover ................................................................................................................ 7- 61
7.12.9.10 Removing the Laser Unit............................................................................................................... 7- 61
7.12.9.11 Removing the Hopper Assembly................................................................................................... 7- 62
7.12.9.12 Removing the Toner Level Sensor ................................................................................................ 7- 63
7.12.10 Toner Feedscrew Motor ....................................................................................................................... 7- 63
7.12.10.1 Removing the Front Cover Unit .................................................................................................... 7- 63
7.12.10.2 Removing the Waste Toner Case................................................................................................... 7- 64
7.12.10.3 Removing the Toner Cartridge ...................................................................................................... 7- 64
7.12.10.4 Removing the Drum Unit .............................................................................................................. 7- 65
7.12.10.5 Removing the Developing Assembly ............................................................................................ 7- 66
7.12.10.6 Removing the Upper Tray ............................................................................................................. 7- 67
7.12.10.7 Removing the Toner Cartridge Cover ........................................................................................... 7- 68
7.12.10.8 Removing the Pre-Exposure Lamp................................................................................................ 7- 68
7.12.10.9 Removing the Left Cover .............................................................................................................. 7- 68
7.12.10.10 Removing the Laser Unit............................................................................................................. 7- 69
7.12.10.11 Removing the Hopper Assembly................................................................................................. 7- 70