Dell 5110cn Service Manual page 518

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 Trickle ....................................................................................................................................... 6 - 8
1.3.5 Primary transfer (drum -> IDT 1)............................................................................................. 6 - 10
1.3.6 Secondary transfer (IDT 1 -> IDT 2) ....................................................................................... 6 - 12
1.3.7 Cleaning (IDT 1)...................................................................................................................... 6 - 12
1.3.8 Tertiary transfer (IDT 2 - paper) .............................................................................................. 6 - 14
1.3.9 Cleaning (IDT 2)...................................................................................................................... 6 - 14
1.3.10 Static elimination................................................................................................................... 6 - 14
1.3.11 Fixing .................................................................................................................................... 6 - 15
1.3.12 Cleaning (general) ................................................................................................................ 6 - 16
2. Paper Transfer...........................................................................................................6 - 18
2.1 Paper Transfer Route (without option)............................................................................................ 6 - 18
2.2 Layout of Paper Transfer Route...................................................................................................... 6 - 19
3. Functions of Major Functional Components ..............................................................6 - 20
3.1 Paper Cassette ............................................................................................................................... 6 - 20
3.1.1 Major functions........................................................................................................................ 6 - 20
3.1.2 Reference diagram ................................................................................................................. 6 - 21
3.1.3 Multiple sheet feed prevention ................................................................................................ 6 - 22
3.2 Paper Feeder .................................................................................................................................. 6 - 24
3.2.1 Major functions........................................................................................................................ 6 - 24
3.2.2 Reference diagram ................................................................................................................. 6 - 25
3.3 Separator & Registration Assembly ................................................................................................ 6 - 26
3.3.1 Major functions........................................................................................................................ 6 - 26
3.3.2 Reference diagram ................................................................................................................. 6 - 27
3.3.3 Multiple sheet feed prevention ................................................................................................ 6 - 28
3.3.4 Lead edge registration ............................................................................................................ 6 - 29
3.4 Inner Duplex Assembly ................................................................................................................... 6 - 30
3.4.1 Major functions........................................................................................................................ 6 - 30
3.4.2 Reference diagram ................................................................................................................. 6 - 31
3.5 Outer Duplex Assembly .................................................................................................................. 6 - 32
3.5.1 Major functions........................................................................................................................ 6 - 32
3.5.2 Reference diagram ................................................................................................................. 6 - 33
3.6 Transfer Roller & Fuser................................................................................................................... 6 - 34
3.6.1 Major functions........................................................................................................................ 6 - 34
3.6.2 Reference diagram ................................................................................................................. 6 - 35
3.7 Xerographics................................................................................................................................... 6 - 36
3.7.1 Major functions........................................................................................................................ 6 - 36
3.7.2 Reference diagram ................................................................................................................. 6 - 37
3.8 Toner Dispenser Assembly............................................................................................................. 6 - 38
Chapter 6 Principles of Operation