COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)The copier’s high-voltage circuit consists of three PCBs; i.e., high-voltage PCB 1,high-voltage PCB 2, and separation static elimination high-voltage PCB. These PCBs arecontrolled by the DC controller PCB, and each in turn controls the following:High-voltage PCB 1: primary charging roller, black/color developing cylinderHigh-voltage PCB 2: intermediate transfer drum, ITD cleaning roller, secondarytransfer belt, secondary pre-transfer charging assembly,upper fixing rollerSeparation static elimination high-voltage PCB:paper after secondary transferThe DC controller PCB sets the various high-voltage levels and pulse outputs of ref-erence frequency, and turns on and off the various high-voltage loads.B. High-Voltage PCB 1The high-voltage power supply PCB 1 consists of the following three circuits:Figure 4-603CHAPTER 4 IMAGE FORMATION SYSTEM4-26Black developingcylinder Primary charging rollerHigh-voltage PCB 1ColordevelopingcylinderDC controller PCBColor developingbias generationcircuitPrimarycharging biasgenerationcircuitBlack developing biasgeneration circuitBlack tonerlevel detectioncircuitANTDownload free service manual at http://printer1.blogspot.com
