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COPYRIGHT © 2002 CANON INC. CANON CLC1100/1130/1150/1160/1180 REV.1 FEB. 2002 PRINTED IN JAPAN (IMPRIME AU JAPON)
6-1
CHAPTER 6 IMAGE FORMATION SYSTEM
I.
IMAGE FORMATION SYSTEM
A. Outline
The major functions of the image formation system are as follows:
Table 6-101
Item
Description
Drum surface potential control
1. Setting the voltage of the primary charging assembly
grid bias.
2. Setting the voltage of the developing bias (Vg).
3. Measuring the dark area attenuation potential.
Primary charging assembly
Using DC constant voltage control (setting by potential
grid bias control
control).
Developing bias control
Using AC constant voltage control (on/off control).
Using DC constant voltage control (setting by potential
control).
Primary current control
Using DC constant current control (on/off control).
Attraction current control
Using DC constant current control (on/off control).
Using current level control (setting by paper type/
environment sensor).
Transfer current control
Using DC constant current control (on/off control).
Using current level control (setting by paper type/
environment sensor).
Separation current control
Using AC voltage level control (setting paper type/
environment sensor).
Using DC current level control (setting by paper type/
environment sensor).
Internal/external static
Using DC constant current control (on/off control).
eliminating current control
Using DC current level control (setting by paper type/
environment sensor).
Using AC constant voltage control (on/off control).
Post-cleaning current control
Using DC constant current control (on/off control).
Using current level control (setting by paper type/
environment sensor).
Photosensitive drum
Using heater control : reference temperature 41ºC
temperature control
Pre-exposure control
Using a fuse lamp (12 pc.; on/off control).
Developing assembly
Controlling the mechanism to lock a developing assembly
engagement control
against the photosensitive drum.
Color toner density control
Measuring the concentration of toner inside the color
developing assembly, and issuing a supply command.
Black toner concentration control
Measuring the concentration of toner (Y,M,C,Bk), and
issuing a supply command.
Toner supply control
Controlling supply of toner from the hopper.
Waste toner collection control
Detecting a waste toner case full condition.
Detecting a waste toner feedscrew lock condition
New gradation correction control
Measures the intensity of the light reflected by the Bk sample
(CLC1140/1160/1180 only)
image on the photosensitive drum ; operates gradation
correction control.
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