Canon imagePRESS C1 Service Manual - page 386
Chapter 7
7-37
F-7-44
7.4.17 ACR Control (Auto Carrier Refresh Control)
0014-5067
imagePRESS C1 P / imagePRESS C1
This machine performs ACR control, which works for supplying developer and also discharging deteriorated carrier, to increase the life of each developing unit.
The supplied developer is transported by the developer stirring screw in the developing unit.
After the waste toner is discharged by the developer stirring screw in the developing unit to the discharge mouth of the developing unit, it drops by its own weight
when the developing rotary is rotating and will be collected to the waste toner bottle by the waste toner feeding screw located inside the rotary shaft.
Activation
Read the test pattern.
Color sensor
Create an image correction table
in the main controller. (M, Y, C, Bk)
Example) Image correction table for Color M
Actual gradation
characteristics
Ideal image
characteristics
0
100
Data output (color sensor)
M1
M2
M3
M4
M5
Data output (MN-CON)
M22 M23
Print the test pattern.
Transport the paper to the
duplexing feeding unit.
Printer
Printer
Output the data.
100
Color sensor
Printer
Vcont
Density data (color sensor)
290
300
1.4
1.6
1.7
250
D-max correction