Ricoh G092 Service Manual page 17

6.3.5 DEVELOPMENT ......................................................................................6-17
PCU and OPC drum .....................................................................................6-17
6.3.6 TRANSFER BELT UNIT DRIVE ............................................................6-19
Belt tension unit.............................................................................................6-19
Four phases ...................................................................................................6-20
Belt home position sensor ...........................................................................6-20
Monochrome printing and color printing ....................................................6-21
6.3.7 BELT TRANSFER AND CLEANING.....................................................6-23
Transfer from drum to belt ...........................................................................6-23
Transfer from belt to paper..........................................................................6-24
Belt cleaning ..................................................................................................6-25
6.3.8 WASTE TONER CARTRIDGE ..............................................................6-26
Mechanism.....................................................................................................6-26
Sensor ............................................................................................................6-27
6.3.9 FUSING .....................................................................................................6-28
Fusing process ..............................................................................................6-28
Circuit board ..................................................................................................6-29
6.3.10 PAPER FEED.........................................................................................6-34
Drive motors ..................................................................................................6-35
Sensors ..........................................................................................................6-35
Paper size detection switch combination..................................................6-35
Registration clutch........................................................................................6-36
Feeding envelopes .......................................................................................6-36
Paper feed speed..........................................................................................6-36
6.3.11 STANDARD TRA Y LOCK MECHANISM...........................................6-37
6.3.12 PAPER EXIT AND PAPER SWITCHBACK.......................................6-38
Normal Printing Mode (Not Duplex Printing Mode) .................................6-38
Duplex Printing Mode (Paper Switchback) ...............................................6-39
6.3.13 COLOR POINT ADJUSTMENT...........................................................6-40
Adjustment types ..........................................................................................6-40
Adjustment timing .........................................................................................6-41
6.4 CONTROLLER...................................................................................................6-42
6.4.1 OVERVIEW ...............................................................................................6-42
6.4.2 BOARD LAYOUT .....................................................................................6-44
6.4.3 PRINT DATA PROCESSING.................................................................6-45
RPCS Driver ..................................................................................................6-45
PCL5c Driver .................................................................................................6-45
PS3 Driver......................................................................................................6-46
CMS (Color Management System)............................................................6-46
Gray Correction.............................................................................................6-46
BG/UCR (Black Generation/Under Color Removal)................................6-46
Gamma Correction .......................................................................................6-46
Toner Limitation ............................................................................................6-47
Dither Processing and ROP/RIP ................................................................6-47
6.5 CONTROLLER FUNCTIONS...........................................................................6-48
6.5.1 SAMPLE PRINT .......................................................................................6-48
6.5.2 LOCKED PRINT.......................................................................................6-48
6.5.3 PAPER SOURCE SELECTION.............................................................6-49
Tray Priority (Auto Tray Select) ..................................................................6-49
SM v G081/G092