COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 4IMAGE FORMATION SYSTEMI. PROCESSES .....................................4-1A. Outline ...........................................4-1B. Basic Sequence of Operations(image formation system)..............4-3C. Controlling the Scanning Lamp .....4-4D. Controlling the Primary ChargingRoller Bias .....................................4-10E. Controlling the Transfer RollerBias................................................4-13F. Controlling the Static EliminatorBias................................................4-16G. Controlling Blank Exposure ...........4-18H. Controlling the Primary CoronaRoller Cleaning Mechanism ..........4-20I. Releasing the Transfer Roller ........4-21II. DEVELOPING ASSEMBLY ANDCLEANING ASSEMBLY .....................4-22A. Outline ...........................................4-22B. Controlling the Toner LevelDetection .......................................4-23C. Controlling the DevelopmentBias................................................4-25D. Automatic Control of CopyDensity...........................................4-27III. DISASSEMBLY AND ASSEMBLY ......4-30A. Illumination Assembly....................4-30B. Drum Unit ......................................4-39C. Primary Corona Assembly.............4-41D. Transfer Charging Assembly .........4-44E. Developing System........................4-47This chapter discusses the principles of how images are formed. It also explains the timing atwhich the various units involved in image formation are operated, and shows how they may bedisassembled/assembled and adjusted.
