Chapter 6 Image Formation System; Image Formation System; Outline - Canon 1130 Service Manual

I.

IMAGE FORMATION SYSTEM

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

CHAPTER 6 IMAGE FORMATION SYSTEM

Description
6-1