Canon iR6570 series, Service Manual

Page: 199 / 684

Chapter 7
7-1
7.1 Construction
7.1.1 Overview
0009-3488
The following shows the functions of and the methods used by the machine's image formation system:
T-7-1
7.1.2 Major Components
0009-3533
The following shows the major components of the machine's image formation system:
F-7-1
Item Description
Photosensitive drum amorphous silicon (80-mm dia.)
cleaning: by blade
Developing assembly developing cylinder (24.5-mm dia.)
developing method: dry, 1-component toner projection
toner: magnetic negative toner
Pre-exposure LED array
on/off control
Potential sensor potential control
[1] sets primary current
[2] sets laser output
[3] sets developing bias (DC)
wire auto cleaning [1] primary charging wire
[2] pre-transfer charging wire
[3] transfer charging wire
[4] separation charging wire
Primary charging control DC constant current control: set by result of potential control
Grid bias control fixed voltage control; fixed by varistor
Developing bias control AC constant voltage control: on/off control only
DC constant voltage control: set by result of potential control
dust-collecting roller bias
control DC non-control
pre-transfer charging control AC constant voltage control: fuzzy control by environment sensor
DC constant current control: on/off only
Transfer charging control DC constant current control: fuzzy control by environment sensor
Separation charging control AC constant voltage control
DC constant current control: fuzzy control based on output of environment sensor
and drum surface potential
Developing assembly
Dust-colleting roller
Pre-transfer charging assembly
Transfer guide
Transfer charging assembly
Separation charging assembly
Cleaner unit
Pre-exposure
Primary charging assembly
Potential sensor