2. Operation• Opening/Closing ShutterThe opening/closing shutter is located in the optical path for full blanking, and isopened/closed by a blank shutter solenoid (SL5). A margin is created by opening theopening/closing shutter operated by SL5 in relation to the leading and trailing edges ofcopy paper.• Slide ShutterThe two slide shutters are located in the optical path for size blanking, and arepositioned by the blank shutter motor (M8).The blanking shutters serve to create left and right margins by blacking (whiting) outnon-image widths (as in reduced copying).Figure 4-1123. Controlling the Slide ShuttersThe front and rear slide shutters are operated simultaneously by the work of theblank shutter motor (M8).When the power is on, M8 first rotates the slide shutters to home position; then, M8starts to rotate to slide the shutters to a specific position in response to the drive pulsessent from the DC controller according to the reproduction ratio, paper size, and copyingmode.CHAPTER 4 IMAGE FORMATION SYSTEMCOPYRIGHT © 1997 CANON INC. CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) 4-15Size blankingreflecting plateTotal blankingreflecting plateImage exposureoptical pathPhotosensitive drumDrum cleanerassemblySize blank optical pathTotal blank optical pathOpen/Close shutterSlide shutterPre-exposureoptical pathDownload Service Manual And Resetter Printer at http://printer1.blogspot.com
