Ricoh G108 Service Manual page 19

6.3.2 LASER SYNCHRONIZATION ........................................................6-12
6.3.3 SPECIFICATIONS..........................................................................6-12
6.3.4 OPTICS UNIT FAN.........................................................................6-13
6.3.5 LASER EXPOSURE .......................................................................6-13
6.3.6 SAFETY SWITCH...........................................................................6-14
6.4 OPC BELT...............................................................................................6-15
6.4.1 DRIVE.............................................................................................6-15
6.4.2 OPC BELT CLEANING...................................................................6-15
6.4.3 CHARGE ROLLER AND CLEANING ROLLER ..............................6-16
6.4.4 OPC BELT SENSOR......................................................................6-17
6.4.5 QUENCHING..................................................................................6-17
6.5 DEVELOPMENT UNIT ............................................................................6-18
6.5.1 OVERVIEW ....................................................................................6-18
6.5.2 DEVELOPMENT UNIT SENSOR ...................................................6-18
6.5.3 DRIVE.............................................................................................6-19
6.5.4 DEVELOPMENT UNIT CONTACT MECHANISM ..........................6-20
Contact Mechanism ............................................................................6-20
Spring Clutch ......................................................................................6-21
6.5.5 DEVELOPMENT BIAS ...................................................................6-21
6.5.6 TONER END SENSOR ..................................................................6-22
Arrangement .......................................................................................6-22
Mechanism .........................................................................................6-22
Near End and End ..............................................................................6-22
6.6 TRANSFER BELT ...................................................................................6-23
6.6.1 DRIVE.............................................................................................6-23
6.6.2 TRANSFER BELT SENSOR AND ID SENSOR .............................6-24
Transfer Belt Sensor ...........................................................................6-24
ID Sensor............................................................................................6-24
ID Sensor Cleaning.............................................................................6-25
6.6.3 TRANSFER BELT CLEANING .......................................................6-26
Cleaning Mechanism ..........................................................................6-26
Drive ...................................................................................................6-26
Contact-Release Mechanism..............................................................6-27
Waste Toner Agitator ..........................................................................6-28
6.6.4 WASTE-TONER COLLECTION UNIT ............................................6-29
Overview.............................................................................................6-29
Drive ...................................................................................................6-29
Waste Toner Sensor ...........................................................................6-30
Messages ...........................................................................................6-30
Near-Full and Full ...............................................................................6-30
6.7 PAPER TRAY UNIT ................................................................................6-31
6.7.1 OVERVIEW ....................................................................................6-31
6.7.2 PAPER LIFT ...................................................................................6-32
6.7.3 PAPER FEED .................................................................................6-33
Paper Feed Roller...............................................................................6-33
Drive ...................................................................................................6-33
6.7.4 PAPER SIZE AND PAPER TRAY DETECTION.............................6-34
Mechanism .........................................................................................6-34
Paper Size ..........................................................................................6-34
SM vii G108