Ricoh B089 Service Manual page 14

2.6 DRUM CHARGE .....................................................................................2-28
2.6.1 OVERVIEW ....................................................................................2-28
2.6.1 CHARGE ROLLER VOLTAGE CORRECTION ..............................2-29
2.6.2 ID SENSOR PATTERN PRODUCTION TIMING............................2-30
2.6.3 DRUM CHARGE ROLLER CLEANING ..........................................2-31
2.7 DEVELOPMENT .....................................................................................2-32
2.7.1 OVERVIEW ....................................................................................2-32
2.7.2 DRIVE.............................................................................................2-33
2.7.3 DEVELOPER MIXING ....................................................................2-34
2.7.4 DEVELOPMENT BIAS ...................................................................2-35
2.7.5 TONER SUPPLY ............................................................................2-36
2.7.6 TONER DENSITY CONTROL ........................................................2-38
2.7.7 TONER SUPPLY IN ABNORMAL SENSOR CONDITIONS...........2-42
2.7.8 TONER NEAR END/END DETECTION AND RECOVERY............2-42
2.8 DRUM CLEANING AND TONER RECYCLING.......................................2-44
2.8.1 DRUM CLEANING..........................................................................2-44
2.8.2 TONER RECYCLING .....................................................................2-45
2.9 PAPER FEED..........................................................................................2-46
2.9.1 OVERVIEW ....................................................................................2-46
2.9.2 PAPER FEED DRIVE MECHANISM ..............................................2-47
2.9.3 PAPER FEED AND SEPARATION MECHANISM..........................2-48
2.9.4 PAPER LIFT MECHANISM ............................................................2-49
2.9.5 PAPER END DETECTION .............................................................2-50
2.9.6 PAPER HEIGHT DETECTION .......................................................2-51
2.9.7 FEED PRESSURE ADJUSTMENT FOR PAPER SIZE..................2-52
2.9.8 PAPER SIZE DETECTION.............................................................2-55
2.9.9 SPECIAL PAPER SETTING...........................................................2-56
2.9.10 SIDE AND END FENCES.............................................................2-57
2.9.11 PAPER REGISTRATION..............................................................2-58
2.10 IMAGE TRANSFER AND PAPER SEPARATION .................................2-59
2.10.1 OVERVIEW ..................................................................................2-59
2.10.2 IMAGE TRANSFER CURRENT TIMING......................................2-60
2.10.3 TRANSFER ROLLER CLEANING................................................2-61
2.10.4 PAPER SEPARATION MECHANISM...........................................2-61
2.11 IMAGE FUSING AND PAPER EXIT......................................................2-62
2.11.1 OVERVIEW ..................................................................................2-62
2.11.2 FUSING DRIVE AND RELEASE MECHANISM ...........................2-63
2.11.3 FUSING ENTRANCE GUIDE SHIFT MECHANISM .....................2-64
2.11.4 PRESSURE ROLLER...................................................................2-65
2.11.5 CLEANING MECHANISM ............................................................2-65
2.11.6 FUSING TEMPERATURE CONTROL..........................................2-66
2.11.7 OVERHEAT PROTECTION .........................................................2-68
2.11.8 PAPER EXIT ................................................................................2-68
2.12 ENERGY SAVER MODES ....................................................................2-69
2.12.1 OVERVIEW ..................................................................................2-69
2.12.2 ENERGY SAVER MODE..............................................................2-70
2.12.3 AUTO OFF MODE........................................................................2-71
B089/B093 ii SM