Canon IR3300, IR2800, IR2200 manual Outline of Processes, T04-101-01

CHAPTER 4 IMAGE FORMATION SYSTEM

1 Outline of Processes

1.1 Outline

T04-101-01 shows the functions of and the methods used in the image formation system:

Item	Description
Photosensitive drum	OPC (30-mm dia.)
drum cleaning	cleaning blade
Developing assembly	Developing cylinder (20-mm dia.)
	Development method:dry, 1-component, toner projection
	Toner:magnetic, negative
Pre-exposure (LAMP2)	Fuse lamp (8 pc.)
	ON/OFF control (activated in sync with main motor)
Drum sensor (U701)	Primary charging roller DC bias corrected to temperature around
	photosensitive drum
Environment sensor (S3)	Primary charging roller AC bias corrected to suit humidity reading
Primary charging roller auto	Pad push-on type
cleaning
Primary charging roller bias	DC constant voltage control (-500 to -850 V)
control	AC constant current control (2000 to 2300 µA; about 1800 Hz)
Developing bias control	DC constant voltage control (0 to -650 V)
	AC constant voltage control (810 Vp-p; about 1800 Hz)
Transfer charging roller bias	Transfer bias:DC constant current control (switching
control	among +15 µA, +10 µA, +7 µA) + DC constant voltage
	control (up to 7 kVmax)
	Cleaning bias: DC constant voltage control (-2.6 kV)
Transfer guide bias control	DC constant voltage (-600 v)
Separation static eliminating	DC constant voltage (switching between -2.3 KV and -3.0 KV)
bias control
	T04-101-01

COPYRIGHT © 2001 CANON INC. CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001 4-1 P