Construction; Overview; Major Components; Image Formation Process - Canon imageRUNNER 5065 series Service Manual

7.1 Construction

7.1.1 Overview

iR5065 / iR 5055 / iR5075 / / /
The following shows the functions of and the methods used by the machine's image formation system:
Item
Photosensitive drum
Developing assembly
Pre-exposure
Potential sensor
wire auto cleaning
Primary charging control
Grid bias control
Developing bias control
dust-collecting roller bias control
pre-transfer charging control
Transfer charging control
Separation charging control

7.1.2 Major Components

iR5065 / iR 5055 / iR5075 / / /
The following shows the major components of the machine's image formation system:

7.2 Image Formation Process

7.2.1 Overview
iR5065 / iR 5055 / iR5075 / / /
The machine's image formation process consists of the following 8 steps:
Description
amorphous silicon (80-mm dia. A-Si)
cleaning: by blade
developing cylinder (24.5-mm dia.)
developing method: dry, 1-component toner projection
toner: magnetic negative toner
LED array
on/off control
potential control
[1] sets primary current
[2] sets laser output
[3] sets developing bias (DC)
[1] primary charging wire
[2] pre-transfer charging wire
[3] transfer charging wire
[4] separation charging wire
DC constant current control: set by result of potential control
fixed voltage control; fixed by varistor
AC constant voltage control: on/off control only
DC constant voltage control: set by result of potential control
DC non-control
AC constant voltage control: fuzzy control by environment sensor
DC constant current control: on/off only
DC constant current control: fuzzy control by environment sensor
AC constant voltage control
DC constant current control: fuzzy control based on output of environment sensor and drum surface
potential
Primary charging assembly
Pre-exposure
Cleaner unit
Separation charging assembly
step 1 pre-exposure
step 2 primary charging (positive DC)
step 3 laser exposure*
step 4 development (AC + positive DC)
T-7-1
Potential sensor
Dust-colleting roller
Pre-transfer charging assembly
Transfer guide
Transfer charging assembly
F-7-1
T-7-2
Developing assembly
Chapter 7
0015-4473
0015-4474
0015-4475
7-1