Brother HL-4200CN Service Manual page 63

CHAPTER III STRUCTURE OF SYSTEM COMPONENTS ............III-1
1. PRINTING PROCESS ................................................................................... III-1
1.1 Summary of Printing Process .............................................................................................. III-1
1.2 Schematic Diagram for Printing Processes ......................................................................... III-3
1.3 Description of Printing Process Techniques........................................................................ III-4
1.3.1 Charging with electricity ................................................................................................ III-4
1.3.2 Exposure ....................................................................................................................... III-5
1.3.3 Development ................................................................................................................. III-7
1.3.4 Primary transfer (drum -> IDT 1)................................................................................... III-9
1.3.5 Secondary transfer (IDT 1 -> IDT 2) ........................................................................... III-11
1.3.6 Cleaning (IDT 1).......................................................................................................... III-11
1.3.7 Tertiary transfer (IDT 2 - paper) .................................................................................. III-12
1.3.8 Cleaning (IDT 2).......................................................................................................... III-13
1.3.9 Static elimination ......................................................................................................... III-13
1.3.10 Fixing......................................................................................................................... III-14
1.3.11 Cleaning (general) .................................................................................................... III-15
2. FLOW OF PRINT DATA ............................................................................... III-17
2.1 Data Flow........................................................................................................................... III-17
3. DRIVE TRANSMISSION ROUTE................................................................. III-18
3.1 Drive ASSY main ............................................................................................................... III-18
3.2 Drive ASSY DEVE ............................................................................................................. III-19
3.3 Holder Toner Cartridge ASSY (Y, M, C, K) ....................................................................... III-19
3.4 Fuser Drive ASSY.............................................................................................................. III-20
3.5 Motor ASSY DUP............................................................................................................... III-20
3.6 Gear Layout ....................................................................................................................... III-21
4. PAPER TRANSFER..................................................................................... III-22
4.1 Paper Transfer Route (without option) .............................................................................. III-22
4.2 Layout of Paper Transfer Route ........................................................................................ III-23
5. FUNCTIONS OF MAJOR FUNCTIONAL COMPONENTS ........................... III-24
5.1 Paper Cassette .................................................................................................................. III-25
5.1.1 Major functions............................................................................................................ III-25
5.1.2 Reference diagram ..................................................................................................... III-25
5.2 Paper Feeder ..................................................................................................................... III-26
5.2.1 Major functions............................................................................................................ III-26
5.2.2 Reference diagram ..................................................................................................... III-27
5.3 Housing ASSY Retard ....................................................................................................... III-28
5.3.1 Major functions............................................................................................................ III-28
5.3.2 Reference diagram ..................................................................................................... III-28
5.4 Front ASSY In .................................................................................................................... III-29
5.4.1 Major functions............................................................................................................ III-29
5.4.2 Reference diagram ..................................................................................................... III-29
5.5 Chute ASSY Out ................................................................................................................ III-30
CONTENTS