Ricoh Aficio 480W Dolphin-C2 Service Manual page 20

6.2.4 ORIGINAL FEED SPEED.................................................................6-8
6.2.5 ORIGINAL TEMPORARY DELAY ....................................................6-9
6.2.6 SCANNING MECHANISM..............................................................6-10
6.2.7 AUTO IMAGE DENSITY CORRECTION........................................6-11
6.2.8 ORIGINAL EXIT SWITCHING MECHANISM .................................6-12
6.3 IMAGE PROCESSING ............................................................................6-13
6.3.1 GENERAL IMAGE PROCESSING FLOW CHART.........................6-13
6.3.2 ORIGINAL MODES ........................................................................6-14
Overview.............................................................................................6-14
1. Drawing Mode ..................................................................................6-15
2. Text Mode.........................................................................................6-16
3. Text/Photo Mode ..............................................................................6-17
4. Photo Mode ......................................................................................6-18
5. Background Line Mode.....................................................................6-19
6. Patched Original Mode .....................................................................6-20
7. Generation........................................................................................6-21
6.4 AROUND THE DRUM .............................................................................6-22
6.4.1 OVERVIEW ....................................................................................6-22
6.4.2 DRUM DRIVE .................................................................................6-23
6.4.3 CHARGE CORONA UNIT ..............................................................6-23
6.4.4 CORONA WIRE CLEANING ..........................................................6-23
6.4.5 CLEANING THE DRUM .................................................................6-24
6.4.6 COLLECTING USED TONER ........................................................6-25
6.4.7 QUENCHING..................................................................................6-26
6.4.8 ANTI-CONDENSATION HEATERS................................................6-26
6.5 IMAGE WRITING ....................................................................................6-27
6.5.1 LED HEADS ...................................................................................6-27
6.6 DEVELOPMENT .....................................................................................6-28
6.6.1 OVERVIEW ....................................................................................6-28
6.6.2 DEVELOPER CROSS-MIXING ......................................................6-29
6.6.3 DEVELOPMENT BIAS ...................................................................6-30
Copying...............................................................................................6-30
Making ID Sensor Patterns .................................................................6-30
6.6.4 DEVELOPMENT DRIVE MECHANISM..........................................6-31
6.6.5 TONER SUPPLY MECHANISM .....................................................6-31
6.6.6 ID SENSOR....................................................................................6-32
6.6.7 TONER END/NEAR-END CONTROL ............................................6-33
Near-end Detection.............................................................................6-33
End Detection/Recovery from Near-end .............................................6-33
6.6.8 TONER END RECOVERY .............................................................6-34
6.6.9 TONER DENSITY CONTROL ........................................................6-35
Overview.............................................................................................6-35
Toner Supply Modes...........................................................................6-35
6.6.10 DEVELOPMENT TIMING CHART................................................6-36
6.7 PAPER FEED AND REGISTRATION .....................................................6-38
6.7.1 OVERVIEW ....................................................................................6-38
6.7.2 PAPER HOLDER............................................................................6-40
6.7.3 PAPER WIDTH AND MEDIA TYPE SETTINGS.............................6-41
6.7.4 ROLL TRAY FEED MECHANISM ..................................................6-41
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