Canon IR6570 Series Service Manual page 13

7.4.6APC Correction ......................................................................................................................................... 7- 12
7.4.7Adjusting the Density in Various Modes .................................................................................................. 7- 13
7.5 Charging Mechanism ...................................................................................................................................... 7- 15
7.5.1 Controlling Pre-Exposure LED................................................................................................................. 7- 15
7.5.1.1 Pre-Exposure LED Control ............................................................................................................... 7- 15
7.5.2 Primary Charging Mechanism .................................................................................................................. 7- 15
7.5.2.1 Overview ........................................................................................................................................... 7- 15
7.5.2.2 Primary Charging Assembly Cleaning Mechanism .......................................................................... 7- 16
7.5.2.3 Others ................................................................................................................................................ 7- 17
7.5.3 Dust-Collecting Roller Bias ...................................................................................................................... 7- 18
7.5.3.1 Overview ........................................................................................................................................... 7- 18
7.5.4 Pre-Transfer Charging Mechanism........................................................................................................... 7- 18
7.5.4.1 Outline ............................................................................................................................................... 7- 18
7.5.4.2 Controlling the Output to Suit the Environment (fuzzy control) ...................................................... 7- 19
7.5.4.3 Pre-Transfer Charging Assembly Cleaning Mechanism................................................................... 7- 20
7.5.4.4 Others ................................................................................................................................................ 7- 20
7.6 Drum Cleaner Unit .......................................................................................................................................... 7- 22
7.6.1Outline ....................................................................................................................................................... 7- 22
7.6.2Detecting the State (full) of the Waste Toner Case................................................................................... 7- 22
7.7 Developing Assembly ..................................................................................................................................... 7- 24
7.7.1Controlling the Developing Assembly Drive ............................................................................................ 7- 24
7.7.2Controlling the Developing Bias ............................................................................................................... 7- 24
7.7.3Detecting the Toner Level and Controlling Toner Supply........................................................................ 7- 26
7.8 Transfer Mechanism........................................................................................................................................ 7- 28
7.8.1 Transfer Charging Mechanism.................................................................................................................. 7- 28
7.8.1.1 Outline ............................................................................................................................................... 7- 28
7.8.1.2 Controlling the Output to Suit the Environment (fuzzy control) ...................................................... 7- 28
7.8.1.3 Transfer Charging Assembly Cleaning Mechanism.......................................................................... 7- 29
7.8.1.4 Others ................................................................................................................................................ 7- 30
7.9 Separation Mechanism .................................................................................................................................... 7- 32
7.9.1 Separation Charging Mechanism .............................................................................................................. 7- 32
7.9.1.1 Outline ............................................................................................................................................... 7- 32
7.9.1.2 Correcting the Output to Suit the Environment and the Drum Surface Potential ............................. 7- 32
7.9.1.3 Others ................................................................................................................................................ 7- 33
7.10 Parts Replacement Procedure ........................................................................................................................ 7- 35
7.10.1 Process Unit ............................................................................................................................................ 7- 35
7.10.1.1 Removing the Primary Fan Duct..................................................................................................... 7- 35
7.10.1.2 Removing the Developing Assembly.............................................................................................. 7- 35
7.10.1.3 Removing the Process Unit ............................................................................................................ 7- 36
7.10.1.4 Mounting the Process Unit .............................................................................................................. 7- 37
7.10.2 Pre-Exposure Lamp ................................................................................................................................ 7- 38
7.10.2.1 Removing the Primary Fan Duct..................................................................................................... 7- 38
7.10.2.2 Removing the Developing Assembly.............................................................................................. 7- 38
7.10.2.3 Removing the Process Unit ............................................................................................................ 7- 39
7.10.2.4 Removing the Primary Charging Assembly.................................................................................... 7- 40
7.10.2.5 Removing the Potential Sensor Assembly ...................................................................................... 7- 41
7.10.2.6 Removing the Pre-Exposure Lamp Unit ......................................................................................... 7- 41
7.10.2.7 Cleaning the Primary Anti-Stray Sheet ........................................................................................... 7- 41
7.10.3 Primary Charging Assembly................................................................................................................... 7- 42
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