Ricoh U-C1 B051 - Page 11

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Main Scan Magnification.................................................................... 6-29
Printer Gamma Correction ................................................................. 6-30
Error Diffusion.................................................................................... 6-32
ASICs on the BICU Board Test.......................................................... 6-32
6.7 PHOTOCONDUCTOR UNIT (PCU)........................................................ 6-33
6.7.1 OVERVIEW.................................................................................... 6-33
6.7.2 CHARGE CORONA UNIT.............................................................. 6-34
Power Supply..................................................................................... 6-34
Grid and Wire Cleaning...................................................................... 6-34
Quenching.......................................................................................... 6-35
6.7.3 OPC BELT DRIVE ......................................................................... 6-35
6.7.4 OPC BELT CLEANING UNIT......................................................... 6-36
Bottle Detection.................................................................................. 6-36
Waste Toner Collection...................................................................... 6-36
Drive................................................................................................... 6-37
6.7.5 IMAGE TRANSFER BELT UNIT.................................................... 6-37
Drive................................................................................................... 6-37
Belt Mark Detection............................................................................ 6-38
Transfer Roller ................................................................................... 6-38
6.7.6 IMAGE TRANSFER BELT CLEANING UNIT................................. 6-39
Image Transfer Belt Cleaning............................................................. 6-39
Waste Toner Collection...................................................................... 6-39
Set Switch and Full Sensor................................................................ 6-39
Contact Mechanism ........................................................................... 6-40
Power Supply..................................................................................... 6-41
Drive................................................................................................... 6-41
6.8 LASER EXPOSURE............................................................................... 6-42
6.8.1 OVERVIEW.................................................................................... 6-42
6.8.2 POLYGON MIRROR MOTOR UNIT.............................................. 6-43
Speed................................................................................................. 6-43
6.8.3 SYNCHRONIZATION DETECTOR................................................ 6-43
6.8.4 LD UNIT......................................................................................... 6-43
6.8.5 LD SAFETY SWITCH .................................................................... 6-44
Front Door.......................................................................................... 6-44
Circuit................................................................................................. 6-44
Operation Panel Display and Switch Mechanism............................... 6-45
6.9 DEVELOPMENT..................................................................................... 6-46
6.9.1 OVERVIEW.................................................................................... 6-46
6.9.2 DEVELOPMENT UNIT .................................................................. 6-47
Replacing Units.................................................................................. 6-47
Memory Chip...................................................................................... 6-47
6.9.3 TONER SUPPLY MECHANISM .................................................... 6-48
Drive................................................................................................... 6-48
Rollers and Agitators.......................................................................... 6-49
Shutter ............................................................................................... 6-49
6.9.4 TONER END DETECTION............................................................ 6-50
Mechanism......................................................................................... 6-50
Toner Near-End Detection ................................................................. 6-50
Toner End Detection .......................................................................... 6-51