Ricoh B234 - Page 25

SM xiii B234/B235/B236/D101/D102/D103
6.10.6 1200-DPI RESOLUTION ...........................................................6-61
6.10.7 OPTICAL PATH.........................................................................6-62
6.11 DRUM UNIT........................................................................................6-63
6.11.1 OVERVIEW ...............................................................................6-63
6.11.2 DRUM DRIVE............................................................................6-65
6.11.3 DRUM CHARGE........................................................................6-66
Overview.............................................................................................6-66
Cleaning the Corona Wires.................................................................6-67
6.11.4 DRUM CLEANING.....................................................................6-69
Overview.............................................................................................6-69
Cleaning Unit Drive.............................................................................6-73
Cleaning Blade Pressure and Side-to-Side Movement.......................6-74
6.11.5 AIR FLOW AROUND THE DRUM .............................................6-75
6.11.6 DRUM PICK-OFF PAWLS.........................................................6-76
6.11.7 DRUM QUENCHING .................................................................6-77
6.11.8 PROCESS CONTROL...............................................................6-78
6.12 DEVELOPMENT.................................................................................6-84
6.12.1 OVERVIEW ...............................................................................6-84
6.12.2 DEVELOPMENT MECHANISM.................................................6-85
6.12.3 DRIVE........................................................................................6-86
6.12.4 CROSSMIXING .........................................................................6-87
6.12.5 DEVELOPMENT BIAS...............................................................6-88
6.12.6 DEVELOPMENT UNIT TONER SUCTION................................6-89
6.12.7 TONER HOPPER ......................................................................6-90
Toner Supply ......................................................................................6-90
Toner Hopper Empty Detection ..........................................................6-91
6.12.8 TONER DENSITY CONTROL ...................................................6-92
Overview.............................................................................................6-92
Toner Supply Timing...........................................................................6-92
Sensor Control Mode..........................................................................6-93
Image Pixel Count Control..................................................................6-95
6.13 TONER SUPPLY AND RECYCLING..................................................6-96
6.13.1 OVERVIEW ...............................................................................6-96
6.13.2 TONER BANK............................................................................6-98
Toner Bottle Switching Mechanism.....................................................6-98
Toner Near-end, Toner End, Bottle Replacement...............................6-99
Toner Bottle Sensors ........................................................................6-101
6.13.3 SUPPLYING TONER TO THE DEVELOPMENT UNIT ...........6-102
6.13.4 TONER RECYCLING AND TONER COLLECTION.................6-105
Overview...........................................................................................6-105
Toner Recycling................................................................................6-106
Toner Collection Bottle......................................................................6-107
6.14 PAPER FEED...................................................................................6-109
6.14.1 OVERVIEW .............................................................................6-109
6.14.2 DRIVE......................................................................................6-111
Tray Components (Example: 3rd Tray).............................................6-112
Vertical Paper Path...........................................................................6-112
6.14.3 PAPER LIFT – TRAYS 2 & 3...................................................6-113
6.14.4 PICK-UP AND FEED – TRAYS 1, 2, 3 ....................................6-115