Canon iR4570 Series Service Manual page 13

7.12.2.1 Removing the Front Cover Unit ...................................................................................................... 7- 31
7.12.2.2 Removing the Waste Toner Case .................................................................................................... 7- 31
7.12.2.3 Removing the Drum Unit ................................................................................................................ 7- 32
7.12.3 Hopper Assembly.................................................................................................................................... 7- 33
7.12.3.1 Removing the Front Cover Unit ...................................................................................................... 7- 33
7.12.3.2 Removing the Waste Toner Case .................................................................................................... 7- 33
7.12.3.3 Removing the Toner Cartridge........................................................................................................ 7- 34
7.12.3.4 Removing the Drum Unit ................................................................................................................ 7- 34
7.12.3.5 Removing the Developing Assembly.............................................................................................. 7- 35
7.12.3.6 Removing the Upper Tray ............................................................................................................... 7- 37
7.12.3.7 Removing the Toner Cartridge Cover ............................................................................................. 7- 37
7.12.3.8 Removing the Pre-Exposure Lamp ................................................................................................. 7- 37
7.12.3.9 Removing the Left Cover ................................................................................................................ 7- 38
7.12.3.10 Removing the Laser Unit............................................................................................................... 7- 38
7.12.3.11 Removing the Hopper Assembly................................................................................................... 7- 39
7.12.4 Sub Hopper ............................................................................................................................................. 7- 40
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
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