Canon NP6218, FY8-13EX-000 service manual Chapter Image Formation System

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.	PROCESSES		4-1
	A. Outline		4-1
	B. Basic Sequence of Operations
		(image formation system)	4-3
	C. Controlling the Scanning Lamp		4-4
	D. Controlling the Primary Charging
		Roller Bias	4-10
	E. Controlling the Transfer Roller
		Bias	4-13
	F.	Controlling the Static Eliminator
		Bias	4-16
	G. Controlling Blank Exposure		4-18
	H. Controlling the Primary Corona
		Roller Cleaning Mechanism	4-20
	I.	Releasing the Transfer Roller	4-21

II.DEVELOPING ASSEMBLY AND

CLEANING ASSEMBLY	4-22
A. Outline	4-22
B. Controlling the Toner Level
Detection	4-23
C. Controlling the Development
Bias	4-25
D. Automatic Control of Copy
Density	4-27
III. DISASSEMBLY AND ASSEMBLY	4-30
A. Illumination Assembly	4-30
B. Drum Unit	4-39
C. Primary Corona Assembly	4-41
D. Transfer Charging Assembly	4-44
E. Developing System	4-47

COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)