Brother HL-4200CN Service Manual page 64

5.5.1 Major functions............................................................................................................ III-30
5.5.2 Reference diagram ..................................................................................................... III-31
5.6 Chute ASSY Exit................................................................................................................ III-32
5.6.1 Major functions............................................................................................................ III-32
5.6.2 Reference diagram ..................................................................................................... III-32
5.7 Transfer Roll Cartridge ASSY & Fuser .............................................................................. III-33
5.7.1 Major functions............................................................................................................ III-33
5.7.2 Reference diagram ..................................................................................................... III-34
5.8 Xerographics...................................................................................................................... III-35
5.8.1 Major functions............................................................................................................ III-35
5.8.2 Reference diagram ..................................................................................................... III-36
5.9 Toner Cartridge ASSY ....................................................................................................... III-37
5.9.1 Major functions............................................................................................................ III-37
5.9.2 Reference diagram ..................................................................................................... III-38
5.10 Frame & Drive.................................................................................................................. III-39
5.10.1 Major functions.......................................................................................................... III-39
5.10.2 Reference diagram ................................................................................................... III-39
5.11 Electrical .......................................................................................................................... III-40
5.11.1 Major functions.......................................................................................................... III-40
5.11.2 Reference diagram ................................................................................................... III-41
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-44
7.4.1 Potential control .......................................................................................................... III-44
7.4.2 Toner density control .................................................................................................. III-45
7.4.3 High area coverage mode........................................................................................... III-46
7.4.4 Admix mode ................................................................................................................ III-46
7.4.5 LED light quantity control of holder ASSY CTD.......................................................... III-46
7.5 Color Registration Control ................................................................................................. III-47
7.6 Transfer Roll Cartridge Unit ASSY Control........................................................................ III-48
7.6.1 Detecting the installation of transfer roll cartridge unit ASSY ..................................... III-48
7.6.2 Detecting the life of transfer roll cartridge unit ASSY.................................................. III-48
7.7 Toner Control ..................................................................................................................... III-49
7.7.1 Sensor no toner .......................................................................................................... III-49
7.7.2 Toner presence control ............................................................................................... III-49
7.8 Fuser Control ..................................................................................................................... III-50
7.8.1 Fuser temperature control........................................................................................... III-50
7.8.2 Cool down ................................................................................................................... III-50
7.8.3 Sensor Warm-up ........................................................................................................ III-50