viii
Toner End Recovery .......................................................................... 6-51
6.9.5 DEVELOPMENT UNIT CONTACT MECHANISM ......................... 6-52
Mechanism......................................................................................... 6-52
Reverse Rotation ............................................................................... 6-52
6.9.6 POWER SOURCE......................................................................... 6-53
Development, Toner Supply, and Doctor Rollers ............................... 6-53
Doctor Roller...................................................................................... 6-53
6.10 PAPER FEED....................................................................................... 6-54
6.10.1 OVERVIEW.................................................................................. 6-54
Transport Speed ................................................................................ 6-55
Friction Pad........................................................................................ 6-55
6.10.2 DRIVE MECHANISM................................................................... 6-55
Feed and Vertical Transport............................................................... 6-55
Registration........................................................................................ 6-55
6.10.3 PAPER LIFT ................................................................................ 6-56
Lift Mechanism................................................................................... 6-56
Paper End/Near-End Detection.......................................................... 6-56
6.10.4 PAPER SIZE DETECTION.......................................................... 6-57
Mechanism......................................................................................... 6-57
Switch Pattern.................................................................................... 6-57
6.11 PAPER TRANSFER AND SEPARATION............................................. 6-58
6.11.1 OVERVIEW.................................................................................. 6-58
Jammed Paper Release..................................................................... 6-58
Image Transfer and Paper Separation............................................... 6-58
6.11.2 CONTACT/SEPARATION MECHANISM..................................... 6-59
Timing ................................................................................................ 6-59
Mechanism......................................................................................... 6-59
6.11.3 POWER SUPPLY ........................................................................ 6-60
Circuit................................................................................................. 6-60
Paper Transfer Roller Bias................................................................. 6-60
Discharge Plate.................................................................................. 6-60
Temperature/Humidity Control........................................................... 6-60
Roller Cleaning................................................................................... 6-61
6.12 IMAGE FUSING AND PAPER EXIT..................................................... 6-62
6.12.1 OVERVIEW.................................................................................. 6-62
6.12.2 DRIVE.......................................................................................... 6-63
6.12.3 FUSING UNIT COMPONENTS ................................................... 6-64
Fusing Belt......................................................................................... 6-64
Heating Roller Lamp .......................................................................... 6-64
Pressure Roller Lamp ........................................................................ 6-64
Pressure Roller Pawls........................................................................ 6-64
Fusing Bias ........................................................................................ 6-65
Fusing Unit SCs................................................................................. 6-65
6.12.4 OIL SUPPLY................................................................................ 6-66
Oil Supply........................................................................................... 6-66
Oil Supply........................................................................................... 6-67
Oil End Detection and Recovery........................................................ 6-68
6.12.5 TEMPERATURE CONTROL ....................................................... 6-69
6.12.6 ENERGY SAVER MODES........................................................... 6-70
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