Canon NP6218, FY8-13EX-000 service manual II. Developing Assembly and Cleaning Assembly, Outline

CHAPTER 4 IMAGE FORMATION SYSTEM

II.DEVELOPING ASSEMBLY AND CLEANING ASSEMBLY

A. Outline

The copier’s photosensitive drum, developing cylinder, No. 1 stirring rod, and No. 2 stirring blade are rotated by the drive of the main motor (M1).

The level of the toner inside the developing assembly is monitored by the toner sensor; when it drops below a specific level, the Add Toner indicator flashes on the display of the control panel.

The No. 1 stirring rod serves to supply toner to the developing cylinder and stir the toner flow layer inside the developing chamber.

The No. 2 stirring blade is used to stir the toner inside the toner container and, at the same time, to supply toner to the developing chamber.

The waste toner collected by the cleaning blade is forwarded by the waste toner feed blade for collection inside the waste toner assembly.

	Drum cartridge
Primary charging	Toner container
Cleaning blade roller	Photosensitive
	drum
	Toner sensor

Waste toner feeding blade

Waste toner assembly

M1

Motor drive signal

Developing
cylinder
No. 1
stirring rod	No. 2 stirring blade

		Toner level
	Torque limiter	detection PCB
Main motor		signal
Main motor/
driver PCB		Toner out (TEP*)

DC controller PCB

Figure 4-201

4-22 COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)