Canon ImageRunner iR8500 Series Service Manual page 338

Contents
8.7.2.1 Outline .......................................................................................................................................................................................................... 8-32
8.7.2.2 Controlling the Output to Suit the Environment (fuzzy control).................................................................................................................. 8-32
8.7.2.3 Correcting the Output at the Trailing Edge of Paper .................................................................................................................................... 8-33
8.7.2.4 Transfer Charging Assembly Cleaning Mechanism ..................................................................................................................................... 8-34
8.7.2.5 Others............................................................................................................................................................................................................ 8-35
8.8 Separation Mechanism ................................................................................................................................................ 8-36
8.8.1 Separation Charging Mechanism............................................................................................................................................... 8-36
8.8.1.1 Outline .......................................................................................................................................................................................................... 8-36
8.8.1.2 Correcting the Output to Suit the Environment and the Toner Deposit ....................................................................................................... 8-36
8.8.1.3 Correcting the Output upon Detection of Leakage ....................................................................................................................................... 8-37
8.8.1.4 Others............................................................................................................................................................................................................ 8-38
8.9 Parts Replacement Procedure ...................................................................................................................................... 8-39
8.9.1 Process Unit ............................................................................................................................................................................... 8-39
8.9.1.1 Removing the Process Unit........................................................................................................................................................................... 8-39
8.9.1.2 Removing the Process Unit........................................................................................................................................................................... 8-39
8.9.1.3 Mounting the Process Unit ........................................................................................................................................................................... 8-40
8.9.1.4 Mounting the Process Unit ........................................................................................................................................................................... 8-41
8.9.2 Pre-Exposure Lamp ................................................................................................................................................................... 8-41
8.9.2.1 Removing the Pre-Exposure Lamp Unit....................................................................................................................................................... 8-41
8.9.3 Primary Charging Assembly...................................................................................................................................................... 8-41
8.9.3.1 Removing the Primary Charging Assembly ................................................................................................................................................. 8-41
8.9.4 Pre-Transfer Charging Assembly .............................................................................................................................................. 8-42
8.9.4.1 Removing the Pre-Transfer Charging Assembly.......................................................................................................................................... 8-42
8.9.5 Photosensitive Drum.................................................................................................................................................................. 8-42
8.9.5.1 Points to Note When Handling the Photosensitive Drum............................................................................................................................. 8-42
8.9.5.2 Points to Note When Handling the Photosensitive Drum............................................................................................................................. 8-42
8.9.5.3 Removing the Photosensitive Drum ............................................................................................................................................................. 8-42
8.9.5.4 Removing the Photosensitive Drum ............................................................................................................................................................. 8-43
8.9.6 Drum Cleaner Unit..................................................................................................................................................................... 8-44
8.9.6.1 Construction.................................................................................................................................................................................................. 8-44
8.9.6.2 Construction.................................................................................................................................................................................................. 8-44
8.9.6.3 Removing the Cleaning Blade ...................................................................................................................................................................... 8-44
8.9.6.4 Removing the Cleaning Blade ...................................................................................................................................................................... 8-45
8.9.6.5 Mounting the Cleaning Blade ....................................................................................................................................................................... 8-45
8.9.6.6 Mounting the Cleaning Blade ....................................................................................................................................................................... 8-46
8.9.6.7 Removing the Blade Vibrating Unit ............................................................................................................................................................. 8-46
8.9.7 Photosensitive Drum Heater ...................................................................................................................................................... 8-46
8.9.7.1 Replacing the Photosensitive Drum Heater .................................................................................................................................................. 8-46
8.9.8 Developing Assembly................................................................................................................................................................ 8-47
8.9.8.1 Removing the Developing Assembly ........................................................................................................................................................... 8-47
8.9.8.2 Removing the Hopper ................................................................................................................................................................................... 8-47
8.9.9 Developing Cylinder.................................................................................................................................................................. 8-47
8.9.9.1 Removing the Developing Cylinder ............................................................................................................................................................. 8-47
8.9.10 Developing Blade..................................................................................................................................................................... 8-49
8.9.10.1 Removing the Blade Unit ........................................................................................................................................................................... 8-49
8.9.10.2 Mounting the Blade .................................................................................................................................................................................... 8-49
8.9.11 Developing Cylinder Deceleration Clutch............................................................................................................................... 8-49
8.9.11.1 Remove the Developing Cylinder Deceleration Clutch ............................................................................................................................. 8-49
8.9.11.2 Remove the Developing Cylinder Deceleration Clutch ............................................................................................................................. 8-50
8.9.12 Developing Cylinder Clutch .................................................................................................................................................... 8-50
8.9.12.1 Remove the Developing Cylinder Clutch ................................................................................................................................................... 8-50
8.9.12.2 Remove the Developing Cylinder Clutch ................................................................................................................................................... 8-51
8.9.13 Transfer/Separation Charging Assembly................................................................................................................................. 8-51
8.9.13.1 Removing the Transfer/Separation Charging Assembly ............................................................................................................................ 8-51
8.9.14 Pre-Transfer Exposure LED .................................................................................................................................................... 8-52
8.9.14.1 Removing the Pre-Transfer Exposure LED................................................................................................................................................ 8-52
8.9.14.2 Removing the Pre-Transfer Exposure LED................................................................................................................................................ 8-52
8.9.15 Separation Claw/Separation Claw Drive Assembly ................................................................................................................ 8-53
8.9.15.1 Separation Claw/Separation Claw Drive Assembly ................................................................................................................................... 8-53
8.9.16 Potential Sensor ....................................................................................................................................................................... 8-53