Epson AcuLaser C2900N Service Manual page 556

Chapter 6 Principles of Operation CONTENTS
1. Printing Process ..........................................................................................................6 - 1
1.1 Summary of Printing Process ........................................................................................................... 6 - 1
1.2 Schematic Diagram for Printing Processes ...................................................................................... 6 - 2
1.3 Description of Printing Process Techniques ..................................................................................... 6 - 3
1.3.1 Charge ...................................................................................................................................... 6 - 3
1.3.2 Exposure................................................................................................................................... 6 - 4
1.3.3 Development............................................................................................................................. 6 - 6
1.3.4 Transfer (Drum to Paper).......................................................................................................... 6 - 9
1.3.5 Cleaning (DRUM).................................................................................................................... 6 - 11
1.3.6 Fusing ..................................................................................................................................... 6 - 12
1.3.7 Cleaning (Transfer ASSY) ...................................................................................................... 6 - 13
1.3.8 Waste Toner Collection........................................................................................................... 6 - 14
2. Paper Path.................................................................................................................6 - 15
2.1 Paper Path ...................................................................................................................................... 6 - 15
2.2 Layout of Paper Path ...................................................................................................................... 6 - 16
2.3 Feeding from Paper Tray ................................................................................................................ 6 - 17
2.3.1 Multiple Sheet Feed Prevention.............................................................................................. 6 - 18
2.4 Feeding from Single Sheet Inserter (SSI) ....................................................................................... 6 - 19
2.5 Feeding in Registration Section ...................................................................................................... 6 - 20
2.5.1 Lead-edge Registration........................................................................................................... 6 - 21
2.6 Transfer/Fusing/Exit........................................................................................................................ 6 - 22
2.7 Feeding in Duplex Section .............................................................................................................. 6 - 23
3. Functions of Major Functional Components ..............................................................6 - 24
3.1 Paper Tray ...................................................................................................................................... 6 - 24
3.1.1 Major functions........................................................................................................................ 6 - 24
3.2 Paper Feeder .................................................................................................................................. 6 - 26
3.2.1 Major functions........................................................................................................................ 6 - 26
3.3 SSI & Regi Assy.............................................................................................................................. 6 - 28
3.3.1 Control of paper size............................................................................................................... 6 - 31
3.3.2 Paper detection by the Regi Sensor ....................................................................................... 6 - 31
3.4 Transfer Belt & Fuser Unit .............................................................................................................. 6 - 32
3.4.1 Major functions........................................................................................................................ 6 - 32
3.5 ROS ASSY...................................................................................................................................... 6 - 34
3.5.1 Major functions........................................................................................................................ 6 - 34
3.6 TONER CARTRIDGE & DISPENSER ............................................................................................ 6 - 36
3.6.1 Major functions........................................................................................................................ 6 - 36
3.7 Drum Cartridge ............................................................................................................................... 6 - 37
3.7.1 Major functions........................................................................................................................ 6 - 37
3.8 Drive................................................................................................................................................ 6 - 39
3.8.1 Major functions........................................................................................................................ 6 - 39
3.9 Electrical ......................................................................................................................................... 6 - 42
3.9.1 Major functions........................................................................................................................ 6 - 42
3.9.2 Data Flow................................................................................................................................ 6 - 44
3.10 Duplex........................................................................................................................................... 6 - 45
3.10.1 Major functions...................................................................................................................... 6 - 45
Epson AcuLaser C2900N
Chapter 6 Principles of Operation
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