SM
vii
B125
Drawing Mode.....................................................................................6-21
Background Lines Mode .....................................................................6-22
Sharpen Text Mode ............................................................................6-23
6.3.4 INDEPENDENT DOT ERASE ........................................................6-24
6.3.5 MTF SETTINGS .............................................................................6-25
6.4 AROUND THE DRUM .............................................................................6-26
6.4.1 OVERVIEW ....................................................................................6-26
6.4.2 DRUM DRIVE.................................................................................6-27
6.4.3 CHARGE CORONA UNIT ..............................................................6-28
6.4.4 CORONA WIRE CLEANING ..........................................................6-29
6.4.5 DRUM CLEANING..........................................................................6-30
6.4.6 COLLECTING USED TONER ........................................................6-31
6.4.7 QUENCHING..................................................................................6-32
6.4.8 DRUM ANTI-CONDENSATION HEATERS....................................6-33
6.5 IMAGE WRITING MECHANISM..............................................................6-34
6.6 DEVELOPMENT .....................................................................................6-35
6.6.1 OVERVIEW ....................................................................................6-35
6.6.2 DEVELOPMENT DRIVE MECHANISM..........................................6-36
6.6.3 TONER SUPPLY MECHANISM .....................................................6-37
6.6.4 DEVELOPER CROSS-MIXING ......................................................6-38
6.6.5 DEVELOPMENT BIAS ...................................................................6-39
6.6.6 ID SENSOR....................................................................................6-40
6.6.7 ID SENSOR OPERATION DURING MACHINE WARM-UP...........6-41
6.6.8 TONER DENSITY CONTROL ........................................................6-43
Overview.............................................................................................6-43
Supply Modes .....................................................................................6-43
Detect Supply Mode............................................................................6-44
Fixed Supply Mode .............................................................................6-45
Toner Supply Clutch Operation...........................................................6-45
6.6.9 TONER END/NEAR-END DETECTION .........................................6-47
Toner Near End ..................................................................................6-47
Toner End ...........................................................................................6-47
Toner End Recovery ...........................................................................6-47
Toner End Recovery Flow Chart.........................................................6-48
6.7 PAPER FEED AND REGISTRATION .....................................................6-49
6.7.1 OVERVIEW ....................................................................................6-49
Layout Diagrams.................................................................................6-49
Feed Station Overview........................................................................6-51
Manual Feed Table .............................................................................6-51
Roll Feeder .........................................................................................6-51
Paper Cassette ...................................................................................6-51
Paper Width and Media Type Settings................................................6-51
6.7.2 MANUAL FEED MECHANISM .......................................................6-52
6.7.3 ROLL FEED MECHANISM.............................................................6-53
Drive ...................................................................................................6-53
Roll Pre-feeding ..................................................................................6-54
Procedure ...........................................................................................6-55
6.7.4 ROLL FEEDER PAPER HOLDERS ...............................................6-56
6.7.5 ROLL PAPER CUTTING MECHANISM .........................................6-57