COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)This chapter provides descriptions on the machine’s image processing operations,functions of each operation, relationships between electrical and mechanical systems,and timing at which each associated part is turned on.CHAPTER 4IMAGE FORMATION SYSTEMI. OUTLINE..................................................4-1A. Construction.......................................4-1B. Operations..........................................4-2II. FORMING LATENT STATIC IMAGES......4-5A. Outline................................................4-5B. Drum Cartridge Memory ....................4-6C. Checking the Life of the PhotosensitiveDrum ..................................................4-8D. Monitoring the Waste Toner Case......4-9III. DEVELOPMENT ....................................4-10A. Outline..............................................4-10B. Controlling the Developing Rotary ...4-12C. Locking the Developing Rotary ........4-14D. Detecting the Absence of the TonerCartridges ........................................4-14E. Detecting the Level of Color Toner...4-16F. Checking the Presence/Absence of aColor Toner Cartridge.......................4-17G. Checking the Level of Black Toner andthe Presence/Absence of the BlackToner Cartridge ................................4-17IV. TRANSFER............................................4-18A. Outline..............................................4-18B. Locking the Secondary TransferBelt ...................................................4-19C. Controlling the ITD CleaningRoller................................................4-20V. IMAGE STABILIZATION CORRECTIONCONTROL..............................................4-21A. Environmental Changes CorrectionControl .............................................4-21B. Image Density Correction Control (maxi-mum density control)........................4-21C. Image Gradation Correction Control(requires a PS/PCL Board) ..............4-22D. Detecting the Density.......................4-23VI. HIGH-VOLTAGE POWER SUPPLYCIRCUIT.................................................4-24A. Outline..............................................4-24B. High-Voltage PCB 1 .........................4-26C. High-Voltage PCB 2 .........................4-30D. Separation Static Eliminating BiasPCB..................................................4-33VII. OTHER CONTROL MECHANISMS.......4-34A. Developing Rotary Motor Control ....4-34B. Controlling the Cartridge Motor .......4-36C. Controlling the Drum Motor..............4-37VIII. DISASSEMBLY/ASSEMBLY ..................4-38A. Drive System....................................4-39B. Charging, Developing, andCleaning ...........................................4-45C. PCBs ................................................4-53Download free service manual at http://printer1.blogspot.com
