Service manual

Contents
6.5.2.1 Primary Charging Bias Control .......................................................................................................6- 4
6.6 Developing Unit ...............................................................................................................................................6- 5
6.6.1 Outline........................................................................................................................................................6- 5
6.6.2 Developing Bias Control .........................................................................................................................6- 5
6.7 Toner Container ..............................................................................................................................................6- 6
6.7.1 Outline........................................................................................................................................................6- 6
6.8 Transfer Unit ....................................................................................................................................................6- 6
6.8.1 Outline of the Transfer Unit.....................................................................................................................6- 6
6.8.1.1 Outline.................................................................................................................................................6- 6
6.8.2 Controlling the Transfer Bias ..................................................................................................................6- 7
6.8.2.1 Transfer Roller Bias Control ............................................................................................................6- 7
6.8.3 Separation Mechanism............................................................................................................................6- 7
6.8.3.1 Static Eliminator Bias Control..........................................................................................................6- 7
6.9 Photosensitive Drum Cleaning......................................................................................................................6- 8
6.9.1 Outline........................................................................................................................................................6- 8
6.9.2 Waste Toner Full Detection....................................................................................................................6- 8
6.10 Parts Replacement Procedure....................................................................................................................6- 9
6.10.1 Drum Unit.................................................................................................................................................6- 9
6.10.1.1 Removing the Drum Unit................................................................................................................6- 9
6.10.2 Developing Assembly ............................................................................................................................6- 9
6.10.2.1 Removing the Drum Unit................................................................................................................6- 9
6.10.2.2 Removing the Rear Cover .............................................................................................................6- 9
6.10.2.3 Removing the Right Cover (Lower)..............................................................................................6- 9
6.10.2.4 Removing the Delivery Tray..........................................................................................................6- 9
6.10.2.5 Removing the Developing Assembly ...........................................................................................6- 9
6.10.2.6 Precautions about Installation of Developing Assembly ........................................................6- 10
6.10.2.7 Procedure after Replacing the Developing Assembly.............................................................6- 10
6.10.3 Transfer Charging Roller .....................................................................................................................6- 10
6.10.3.1 Removing the Transfer Charging Roller....................................................................................6- 10
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- 1
7.1.3 Roller Layout Drawing .............................................................................................................................7- 1
7.1.4 Paper Path Drawing(Printer on its own)...............................................................................................7- 2
7.1.5 Paper Path Drawing(Finisher-U1) .........................................................................................................7- 3
7.1.6 Paper Path Drawing(Duplex Unit-A1/Finisher-U1) .............................................................................7- 3
7.1.7 Paper Path Drawing(Duplex-A1) ...........................................................................................................7- 3
7.1.8 Paper Path Drawing(Duplex-A1/Inner 2Way Tray-E1) ......................................................................7- 4
7.1.9 Paper Path Drawing(Inner 2Way Tray-E1) ..........................................................................................7- 4
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 Delivery Sensor/Wound Paper
Jam at Fixing Assembly)..........................................................................................................................7- 6
7.2.2 Stationary Jams ........................................................................................................................................7- 6