Dell 2130cn Service Manual page 765

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 Charging with electricity ............................................................................................................ 6 - 3
1.3.2 Exposure................................................................................................................................... 6 - 4
1.3.3 Development............................................................................................................................. 6 - 6
1.3.4 Transfer (Drum -> Paper) ....................................................................................................... 6 - 10
1.3.5 Cleaning.................................................................................................................................. 6 - 12
1.3.6 Fusing ..................................................................................................................................... 6 - 14
1.3.7 Cleaning (TRANSFER BELT) ................................................................................................. 6 - 15
2. Paper Path.................................................................................................................6 - 16
2.1 Paper Path ...................................................................................................................................... 6 - 16
2.2 Layout of Paper Path ...................................................................................................................... 6 - 17
3. Functions of Major Functional Components ..............................................................6 - 18
3.1 Paper Cassette ............................................................................................................................... 6 - 18
3.1.1 Major functions........................................................................................................................ 6 - 18
3.1.2 Reference diagram ................................................................................................................. 6 - 19
3.1.3 Multiple Sheet Feed Prevention.............................................................................................. 6 - 20
3.1.4 Reference diagram ................................................................................................................. 6 - 20
3.2 Paper Feeder .................................................................................................................................. 6 - 22
3.2.1 Major functions........................................................................................................................ 6 - 22
3.2.2 Reference diagram ................................................................................................................. 6 - 23
3.3 SSI & Regi Assy.............................................................................................................................. 6 - 24
3.3.1 Reference diagram ................................................................................................................. 6 - 25
3.3.2 Lead-edge Registration.......................................................................................................... 6 - 26
3.3.3 Reference diagram ................................................................................................................. 6 - 26
3.3.4 Control of paper size.............................................................................................................. 6 - 27
3.3.5 Paper detection by the Regi Sensor ....................................................................................... 6 - 27
3.4 Transfer Belt & Fuser...................................................................................................................... 6 - 28
3.4.1 Major functions........................................................................................................................ 6 - 28
3.4.2 Reference diagram ................................................................................................................. 6 - 29
3.5 ROS ASSY...................................................................................................................................... 6 - 30
3.5.1 Major functions........................................................................................................................ 6 - 30
3.5.2 Reference diagram ................................................................................................................. 6 - 31
3.6 TONER CARTRIDGE & DISPENSER ............................................................................................ 6 - 32
3.6.1 Major functions........................................................................................................................ 6 - 32
3.6.2 Reference diagram ................................................................................................................. 6 - 32
3.7 PHD Unit ......................................................................................................................................... 6 - 34
3.7.1 Major functions........................................................................................................................ 6 - 34
3.7.2 Reference diagram ................................................................................................................. 6 - 35
3.8 Drive................................................................................................................................................ 6 - 36
3.8.1 Major functions........................................................................................................................ 6 - 36
3.8.2 Reference diagram ................................................................................................................. 6 - 37
3.9 Electrical ......................................................................................................................................... 6 - 38
Chapter 6 Principles of Operation