Ricoh D009 Service Manual page 22

6.9.1 OVERVIEW .....................................................................................6-32
6.9.2 DRIVE MECHANISM.......................................................................6-33
6.9.3 DEVELOPER MIXING.....................................................................6-33
6.9.4 DEVELOPMENT BIAS ....................................................................6-34
6.9.5 TONER SUPPLY.............................................................................6-36
6.9.6 TONER NEAR END/END DETECTION ..........................................6-38
6.9.7 TONER END RECOVERY ..............................................................6-39
6.9.8 TONER SUPPLY WITH ABNORMAL SENSORS ...........................6-39
6.10 DRUM CLEANING AND TONER RECYCLING ..................................6-40
6.10.1 DRUM CLEANING.....................................................................6-40
6.10.2 TONER RECYCLING ................................................................6-41
6.11 PAPER FEED .....................................................................................6-42
6.11.1 OVERVIEW................................................................................6-42
6.11.2 PAPER FEED DRIVE ................................................................6-43
6.11.3 PICK-UP AND SEPARATION ROLLER RELEASE MECHANISM6-43
6.11.4 PAPER LIFT ..............................................................................6-44
6.11.5 TRAY LOCK MECHANISM........................................................6-45
6.11.6 PAPER SIZE DETECTION – TRAYS 1 AND 2..........................6-46
6.11.7 PAPER END DETECTION – TRAYS 1 AND 2 ..........................6-47
6.11.8 REGISTRATION ........................................................................6-48
6.12 BY-PASS TRAY..................................................................................6-49
6.12.1 OVERVIEW................................................................................6-49
6.12.2 DRIVE ........................................................................................6-49
6.12.3 BY-PASS PAPER SEPARATION ..............................................6-50
6.12.4 BY-PASS PAPER SIZE DETECTION........................................6-50
6.13 DUPLEX UNIT ....................................................................................6-51
6.13.1 OVERVIEW................................................................................6-51
6.13.2 DUPLEX DRIVE.........................................................................6-52
6.13.3 INVERTER MECHANISM ..........................................................6-53
6.13.4 DUPLEX OPERATION ..............................................................6-54
6.14 IMAGE TRANSFER AND PAPER SEPARATION ..............................6-56
6.14.1 OVERVIEW................................................................................6-56
6.14.2 BELT DRIVE MECHANISM .......................................................6-57
6.14.3 TRANSFER BELT UNIT CONTACT MECHANISM ...................6-57
6.14.4 IMAGE TRANSFER AND PAPER SEPARATION MECHANISM6-58
6.14.5 TRANSFER BELT CHARGE .....................................................6-59
6.14.6 TRANSFER BELT CLEANING MECHANISM............................6-61
D009/D011/D012/D013 x SM