Canon PC940 Service Manual - Page 93

CHAPTER 4 IMAGE FORMATION SYSTEM This chapter discusses the principles of how images are formed. It also explains the timing at which the various units involved in image formation are operated, and shows how they may be disassembled/assembled and adjusted. I. IMAGE FORMATION SYSTEM ...4-1 A. Outline 4-1 B. Timing Chart for the Image Formation System 4-3 C. Controlling the Primary Charging Roller Bias 4-4 D. Controlling the Transfer Roller Bias 4-8 E. Controlling the Developing/ Separation Static Eliminator Bias 4-11 F. Measuring the Density of Originals 4-16 G. Controlling the Side Blanking Mechanism 4-21 II. DISASSEMBLY/ASSEMBLY ..... 4-22 A. Cartridge 4-23 B. Transfer Charging Assembly 4-25 C. Blank Exposure 4-26 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)