7.8.2 Detecting the Level of Waste Toner .......................................................................................................................................... 7-40

7.8.3 Waste toner case detection......................................................................................................................................................... 7-42

7.9 Parts Replacement Procedure ...................................................................................................................................... 7-43

7.9.1 Process Unit ............................................................................................................................................................................... 7-43

7.9.1.1 Removing the Process Unit........................................................................................................................................................................... 7-43

7.9.2 Drum Unit .................................................................................................................................................................................. 7-44

7.9.2.1 Removing the Drum Cartridge ..................................................................................................................................................................... 7-44

7.9.3 Drum ITB Motor........................................................................................................................................................................ 7-45

7.9.3.1 Before Removing the Drum ITB Moto......................................................................................................................................................... 7-45

7.9.3.2 Removing the Drum ITB Motor ................................................................................................................................................................... 7-45

7.9.4 Hopper Assembly....................................................................................................................................................................... 7-46

7.9.4.1 Before Removing the Hopper Supply Unit................................................................................................................................................... 7-46

7.9.4.2 Removing the Hopper Supply Unit .............................................................................................................................................................. 7-46

7.9.5 Developing Motor (Bk/Y/M/C) ................................................................................................................................................. 7-46

7.9.5.1 Before Removing the Developing Motor ..................................................................................................................................................... 7-46

7.9.5.2 Removing the Developing Motor ................................................................................................................................................................. 7-46

7.9.6 Intermediate Transfer Unit......................................................................................................................................................... 7-47

7.9.6.1 Removing the ITB Unit ................................................................................................................................................................................ 7-47

7.9.7 Transfer Cleaning Unit .............................................................................................................................................................. 7-48

7.9.7.1 Before Removing the Transfer Cleaner Unit ................................................................................................................................................ 7-48

7.9.7.2 Removing the Transfer Cleaner Unit............................................................................................................................................................ 7-48

7.9.7.3 Points to Note When Replacing the Transfer Cleaner Unit.......................................................................................................................... 7-49

7.9.8 Secondary Transfer External Roller........................................................................................................................................... 7-49

7.9.8.1 Removing the Secondary Transfer Outer Roller .......................................................................................................................................... 7-49

7.9.8.2 After Replacing the Secondary Transfer Roller ........................................................................................................................................... 7-50

Table of Contents