Canon imageRunner 2022, Service Manual

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Contents
6.2
Image Formation Process ..........................................................................................................................6- 3
6.2.1 Image Formation Process ....................................................................................................................................... 6- 3
6.3
Basic Sequence..........................................................................................................................................6- 3
6.3.1
Basic Sequence of Operation.................................................................................................................................. 6- 3
6.4
Driving and Controlling the High-Voltage System.......................................................................................6- 5
6.4.1
Outline ..................................................................................................................................................................... 6- 5
6.5
Drum Unit ...................................................................................................................................................6- 5
6.5.1
Outline of the Drum Unit .......................................................................................................................................... 6- 5
6.5.1.1
Outline...................................................................................................................................................................................... 6- 5
6.5.2 Charging Mechanism............................................................................................................................................... 6- 6
6.5.2.1 Primary Charging Bias Control ................................................................................................................................................ 6- 6
6.6 Developing Unit ..........................................................................................................................................6- 6
6.6.1 Outline ..................................................................................................................................................................... 6- 6
6.6.2 Developing Bias Control .......................................................................................................................................... 6- 6
6.7
Toner Container..........................................................................................................................................6- 7
6.7.1 Outline ..................................................................................................................................................................... 6- 7
6.8
Transfer Unit ...............................................................................................................................................6- 7
6.8.1 Outline of the Transfer Unit ..................................................................................................................................... 6- 7
6.8.1.1 Outline...................................................................................................................................................................................... 6- 7
6.8.2 Controlling the Transfer Bias ................................................................................................................................... 6- 8
6.8.2.1 Transfer Roller Bias Control..................................................................................................................................................... 6- 8
6.8.3
Separation Mechanism ............................................................................................................................................ 6- 8
6.8.3.1 Static Eliminator Bias Control .................................................................................................................................................. 6- 8
6.9
Photosensitive Drum Cleaning ...................................................................................................................6- 9
6.9.1 Outline ..................................................................................................................................................................... 6- 9
6.9.2
Waste Toner Full Detection ..................................................................................................................................... 6- 9
6.10 Parts Replacement Procedure................................................................................................................6- 10
6.10.1
Drum Unit............................................................................................................................................................. 6- 10
6.10.1.1
Removing the Drum Unit...................................................................................................................................................... 6- 10
6.10.2
Developing Assembly .......................................................................................................................................... 6- 10
6.10.2.1
Removing the Developing Assembly ................................................................................................................................... 6- 10
6.10.2.2 Precautions about Installation of Developing Assembly ..................................................................................................... 6- 10
6.10.2.3
Procedure after Replacing the Developing Assembly .......................................................................................................... 6- 10
6.10.3
Transfer Charging Roller ..................................................................................................................................... 6- 11
6.10.3.1
Removing the Transfer Charging Roller............................................................................................................................... 6- 11
Chapter 7 Pickup/Feeding System
7.1
Construction ...............................................................................................................................................7- 1
7.1.1 Specifications/Configuration/Operation Methods .................................................................................................... 7- 1
7.1.2 Locations of Main Units ........................................................................................................................................... 7- 2
7.1.3
Roller Layout Drawing ............................................................................................................................................. 7- 2
7.1.4
Paper Path Drawing (Printer on its own) ................................................................................................................. 7- 3
7.1.5 Paper Path Drawing (Finisher-U2) .......................................................................................................................... 7- 3
7.1.6 Paper Path Drawing (Duplex Unit-B1/Finisher-U2) ................................................................................................. 7- 4
7.1.7 Paper Path Drawing (Duplex Unit-B1) ..................................................................................................................... 7- 4
7.1.8
Paper Path Drawing (Duplex-B1/Inner 2Way Tray-E2) ........................................................................................... 7- 4
7.1.9
Paper Path Drawing(Inner 2Way Tray-E2) .............................................................................................................. 7- 5
7.1.10 Sensor Layout Drawing ......................................................................................................................................... 7- 5
7.2
Detecting Jams ...........................................................................................................................................7- 6
7.2.1 Delay Jams.............................................................................................................................................................. 7- 6
7.2.1.1 Delay Jam in Pickup Assembly................................................................................................................................................ 7- 6
7.2.1.2
Delay Jam in Delivery Assembly (Paper Leading Edge Jam at First Delivery Sensor/Wound Paper Jam at Fixing Assembly) 7-
6
7.2.2
Stationary Jams ....................................................................................................................................................... 7- 7
7.2.2.1
Stationary Jam in Pickup Assembly ......................................................................................................................................... 7- 7
7.2.2.2 Stationary Jam in Delivery Assembly (Paper Trailing Edge Stationary Jam at First Delivery Sensor/Stationary Jam at First