Canon iR7086 Series Service Manual page 13

7.5.1 Primary Charging Mechanism ............................................................................................................................... 7- 11
7.5.1.1 Outline.................................................................................................................................................................................... 7- 11
7.5.1.2 Primary Charging Assembly Cleaning Mechanism................................................................................................................ 7- 12
7.5.1.3 Others .................................................................................................................................................................................... 7- 13
7.5.2 Dust-Collecting Roller Bias.................................................................................................................................... 7- 13
7.5.2.1 Outline.................................................................................................................................................................................... 7- 13
7.5.3 Pre-Transfer Charging Mechanism ....................................................................................................................... 7- 14
7.5.3.1 Outline.................................................................................................................................................................................... 7- 14
7.5.3.2 Controlling the Output to Suit the Environment (fuzzy control) .............................................................................................. 7- 15
7.5.3.3 Pre-Transfer Charging Assembly Cleaning Mechanism ........................................................................................................ 7- 16
7.5.3.4 Others .................................................................................................................................................................................... 7- 16
7.6 Drum Cleaner Unit ....................................................................................................................................7- 17
7.6.1 Outline ................................................................................................................................................................... 7- 17
7.6.2 Detecting the Waste Toner (case full condition).................................................................................................... 7- 17
7.7 Developing Assembly ...............................................................................................................................7- 18
7.7.1 Outline ................................................................................................................................................................... 7- 18
7.7.2 Controlling the Developing Assembly.................................................................................................................... 7- 19
7.7.3 Controlling the Toner Cartridge Drive Mechanism ................................................................................................ 7- 20
7.7.4 Controlling the Developing Bias ............................................................................................................................ 7- 21
7.7.5 Detecting the Toner Level and Controlling the Toner Supply Mechanism ............................................................ 7- 22
7.8 Transfer Mechanism .................................................................................................................................7- 25
7.8.1 Transfer Guide Bias............................................................................................................................................... 7- 25
7.8.1.1 Overview ................................................................................................................................................................................ 7- 25
7.8.1.2 Controlling the Output to Suit the Environment...................................................................................................................... 7- 26
7.8.2 Transfer Charging Mechanism .............................................................................................................................. 7- 26
7.8.2.1 Outline.................................................................................................................................................................................... 7- 26
7.8.2.2 Controlling the Output to Suit the Environment (fuzzy control) .............................................................................................. 7- 27
7.8.2.3 Correcting the Output at the Trailing Edge of Paper.............................................................................................................. 7- 28
7.8.2.4 Transfer Charging Assembly Cleaning Mechanism............................................................................................................... 7- 28
7.8.2.5 Others .................................................................................................................................................................................... 7- 29
7.9 Separation Mechanism .............................................................................................................................7- 29
7.9.1 Separation Charging Mechanism .......................................................................................................................... 7- 29
7.9.1.1 Outline.................................................................................................................................................................................... 7- 29
7.9.1.2 Correcting the Output to Suit the Environment and the Toner Deposit.................................................................................. 7- 30
7.9.1.3 Correcting the Output upon Detection of Leakage................................................................................................................. 7- 31
7.9.1.4 Others .................................................................................................................................................................................... 7- 31
7.10 Parts Replacement Procedure................................................................................................................7- 32
7.10.1 Process Unit ........................................................................................................................................................ 7- 32
7.10.1.1 Before Starting the Work...................................................................................................................................................... 7- 32
7.10.1.2 Removing the Process Unit.................................................................................................................................................. 7- 32
7.10.1.3 Mounting the Process Unit ................................................................................................................................................... 7- 32
7.10.2 Pre-Exposure Lamp............................................................................................................................................. 7- 33
7.10.2.1 Removing the Pre-Exposure Lamp Unit............................................................................................................................... 7- 33
7.10.3 Primary Charging Assembly ................................................................................................................................ 7- 33
7.10.3.1 Removing the Primary Charging Assembly ......................................................................................................................... 7- 33
7.10.4 Pre-Transfer Charging Assembly ........................................................................................................................ 7- 33
7.10.4.1 Removing the Pre-Transfer Charging Assembly.................................................................................................................. 7- 33
7.10.5 Photosensitive Drum............................................................................................................................................ 7- 34
7.10.5.1 Points to Note About Handling the Photosensitive Drum..................................................................................................... 7- 34
7.10.5.2 Removing the Photosensitive Drum..................................................................................................................................... 7- 34
7.10.6 Drum Cleaner Unit ............................................................................................................................................... 7- 35
7.10.6.1 Construction ......................................................................................................................................................................... 7- 35
7.10.6.2 Removing the Cleaning Blade.............................................................................................................................................. 7- 35
7.10.6.3 Mounting the Cleaning Blade ............................................................................................................................................... 7- 35
7.10.6.4 Removing the Blade Vibrating Unit ...................................................................................................................................... 7- 35
7.10.7 Photosensitive Drum Heater................................................................................................................................ 7- 36
7.10.7.1 Replacing the Photosensitive Drum Heater ......................................................................................................................... 7- 36
7.10.8 Sub Hopper.......................................................................................................................................................... 7- 36
7.10.8.1 Before Starting the Work...................................................................................................................................................... 7- 36
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