Contents7.11 Photosensitive Drum Cleaning ....................................................................................................................... 7-247.11.1 Outline ..................................................................................................................................................... 7-247.11.2 Collection of Waste Toner....................................................................................................................... 7-247.11.3 Checking the Waste Toner Box ............................................................................................................... 7-247.12 Parts Replacement Procedure ......................................................................................................................... 7-267.12.1 Pre-Exposure Lamp ................................................................................................................................. 7-267.12.1.1 Removing the Front Cover Unit ....................................................................................................... 7-267.12.1.2 Removing the Waste Toner Case...................................................................................................... 7-267.12.1.3 Removing the Toner Cartridge ......................................................................................................... 7-277.12.1.4 Removing the Drum Unit ................................................................................................................. 7-287.12.1.5 Removing the Developing Assembly ............................................................................................... 7-307.12.1.6 Removing the Upper Tray ................................................................................................................ 7-337.12.1.7 Removing the Toner Cartridge Cover .............................................................................................. 7-347.12.1.8 Removing the Pre-Exposure Lamp................................................................................................... 7-347.12.2 Drum Unit................................................................................................................................................ 7-357.12.2.1 Removing the Front Cover Unit ....................................................................................................... 7-357.12.2.2 Removing the Waste Toner Case...................................................................................................... 7-367.12.2.3 Removing the Drum Unit ................................................................................................................. 7-367.12.3 Hopper Assembly .................................................................................................................................... 7-387.12.3.1 Removing the Front Cover Unit ....................................................................................................... 7-387.12.3.2 Removing the Waste Toner Case...................................................................................................... 7-397.12.3.3 Removing the Toner Cartridge ......................................................................................................... 7-407.12.3.4 Removing the Drum Unit ................................................................................................................. 7-417.12.3.5 Removing the Developing Assembly ............................................................................................... 7-437.12.3.6 Removing the Upper Tray ................................................................................................................ 7-457.12.3.7 Removing the Toner Cartridge Cover .............................................................................................. 7-467.12.3.8 Removing the Pre-Exposure Lamp................................................................................................... 7-467.12.3.9 Removing the Left Cover ................................................................................................................. 7-477.12.3.10 Removing the Laser Unit................................................................................................................ 7-487.12.3.11 Removing the Hopper Assembly.................................................................................................... 7-507.12.4 Sub Hopper .............................................................................................................................................. 7-517.12.4.1 Removing the Front Cover Unit ....................................................................................................... 7-517.12.4.2 Removing the Waste Toner Case...................................................................................................... 7-527.12.4.3 Removing the Toner Cartridge ......................................................................................................... 7-537.12.4.4 Removing the Drum Unit ................................................................................................................. 7-547.12.4.5 Removing the Developing Assembly ............................................................................................... 7-567.12.4.6 Removing the Upper Tray ................................................................................................................ 7-587.12.4.7 Removing the Toner Cartridge Cover .............................................................................................. 7-597.12.4.8 Removing the Pre-Exposure Lamp................................................................................................... 7-597.12.4.9 Removing the Left Cover ................................................................................................................. 7-607.12.4.10 Removing the Laser Unit................................................................................................................ 7-617.12.4.11 Removing the Hopper Assembly.................................................................................................... 7-637.12.4.12 Removing the Toner Feedscrew Motor .......................................................................................... 7-647.12.4.13 Removing the Sub Hopper.............................................................................................................. 7-657.12.5 Developing Assembly.............................................................................................................................. 7-687.12.5.1 Removing the Front Cover Unit ....................................................................................................... 7-687.12.5.2 Removing the Waste Toner Case...................................................................................................... 7-697.12.5.3 Removing the Developing Assembly ............................................................................................... 7-707.12.6 Developing Cylinder................................................................................................................................ 7-72
