COPYRIGHT
©
2000 CANON INC. 2000 2000 2000 2000 CANON iR5000/iR6000 REV.0 JULY 2000
CHAPTER 4 IMAGE FORMATION SYSTEM
4-1 P
1. Outline of Processes
1.1 Outline
The functions and methods used in the machine's image formation system are as follows:
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 con-
trol
Transfer charging control
Separation charging control
Function/method
Amorphous silicon (80-mm dia.)
Cleaning method: blade
Developing cylinder (24.5-mm dia.)
Developing method: dry, 1-component, toner projection
Toner: magnetic, negative
Array of 63 LEDs
Turning on/off the Pre-exposure LED Array.
Potential Control
[1] Setting the primary current
[2] Setting the laser output
[3] Setting the 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 potential control
DC constant voltage control: fixed by varistor
Control value: 850 V (approx.)
AC constant voltage control: on/off control only
Voltage: 1500 Vp-p (approx.)
Frequency: 2.7 kHz (approx.)
DC constant voltage control: set by potential control
Control value: 0 to 600 V (approx.)
DC non-control
Voltage: -1000 V (approx.)
AC constant voltage control: fuzzy by environment sensor
DC constant current control: on/off control only
DC current control: fuzzy control by environment sensor
AC constant voltage control
DC constant current control: fuzzy control by environment
sensor and to suit density of original (drum surface potential)
T04-101-01
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