Image Stabilization Control; Overview - Canon imageRUNNERC1022 Service Manual

8.2 Image Stabilization Control

8.2.1 Overview

imageRUNNER C1022 / imageRUNNER C1022i / Color imageRUNNER C1030 / Color imageRUNNER C1030iF
The quality of a printed image is affected by changes in environmental condition where the machine is installed or changes in the characteristics of the photosensitive
drum and toner.
The machine performs the following controls according to necessity to stabilize print operation.
- Environmental change corrective control
To correct values of primary charging biases and developing biases based on the result of detection performed by the environment sensor. This is comparable
to a conventional D-max control.
- D-half control
To correct the gradation data in the main controller PCB based on the result of detection performed by the color displacement/density sensor
- Color displacement corrective control
To correct the timing of sending a video signal based on the result of detection performed by the color displacement/density sensor.
- Auto gradation correction control
To make a stable gradation density feature of image, customers need to execute any of full correction, quick correction or copy image correction.
Timing of execution of each control
No. Execution timing
Replacement of the
1
cartridge
2 Environmental change
After a specified period
3
of time is passed
Recovery from sleep
4
mode
After a specified
5 number of sheets is
printed
Full correction
6
(PASCAL)
7 Quick correction
8 Copy image correction
*: Executed when 120 sheets are printed after the initial implementation
Executed when 500 sheets are printed after the 2nd implementation
Executed when 1000 sheets are printed after the 3rd implementation
Executed when 1000 sheets are printed thereafter
Environmental
Operation time change corrective
control
Approx. 3 min Yes
Approx. 2.5 min Yes
Approx. 2.5 min Yes
Approx. 2.5 min Yes
Approx. 3 min Yes *
Approx. 5 min Yes
Approx. 2.5 min Yes
Approx. 4 min Yes
T-8-1
Color
D-half control displacement
corrective control
Yes Yes
Yes -
Yes -
Yes -
Yes
Yes * (Every 1000
prints)
Yes -
Yes -
Yes -
Remarks
Executed at the time of multiple initial rotations after power-
on or door closing
Temperature and humidity by the environment sensor
Executed 24 hours after the drum motor stops. The control is
not however executed during sleep mode.
Executed 24 hours after the drum motor stops.
Executed after a job is completed.
Executed by user's operation.
Executed by user's operation.
Executed by user's operation.
Chapter 8
0019-5019
8-7