Brother HL-4000CN Service Manual page 7

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
5.2 Paper Feeder .....................................................................................................................III-26
5.3 Housing ASSY Retard .......................................................................................................III-28
5.4 Front ASSY In ....................................................................................................................III-29
5.5 Chute ASSY Out ................................................................................................................III-30
5.6 Chute ASSY Exit................................................................................................................III-32
5.7 Transfer Roll Cartridge ASSY & Fuser ..............................................................................III-33
5.8 Xerographics......................................................................................................................III-35
5.9 Toner Cartridge ASSY .......................................................................................................III-37
5.10 Frame & Drive..................................................................................................................III-39
5.11 Electrical ..........................................................................................................................III-40
6. MODES ........................................................................................................ III-42
6.1 Print Mode..........................................................................................................................III-42
6.2 Operation Modes ...............................................................................................................III-42
7. CONTROL .................................................................................................... III-43
7.1 Control of Paper Size.........................................................................................................III-43
7.2 Selective Control on Paper Pick-up Unit............................................................................III-43
7.3 Scanner Light Quantity Control..........................................................................................III-43
7.4 Process Control .................................................................................................................III-43
7.5 Color Registration Control..................................................................................................III-47
7.6 Transfer Roll Cartridge Unit ASSY Control ........................................................................III-48
7.7 Toner Control .....................................................................................................................III-49
7.8 Fuser Control .....................................................................................................................III-50
CHAPTER IV ASSEMBLY / DISASSEMBLY.................................
1. BEFORE STARTING DISASSEMBLY ........................................................... IV-1
1.1 Precautions ......................................................................................................................... IV-1
1.2 Fuser ASSY Removal ......................................................................................................... IV-2
1.3 Transfer ASSY Removal..................................................................................................... IV-3
1.4 Controller Board Removal................................................................................................... IV-4
1.5 Description of Procedures................................................................................................... IV-5
2. DISASSEMBLY PROCEDURE ...................................................................... IV-6
2.1 Cover of the Printer............................................................................................................. IV-6
2.2 Front of the Printer ............................................................................................................ IV-16
2.3 Top of the Printer .............................................................................................................. IV-40
2.4 Right / Left / PCBs of the Printer....................................................................................... IV-47
2.5 Paper Feed of the Printer.................................................................................................. IV-58
IV-1