Canon imagePRESS C1 Service Manual - page 384
Chapter 7
7-35
F-7-41
MN-CON: Main controller
DC-CON: DC controller
1. Operation Flow
F-7-42
*1: Difference in the three types of test patterns
- Test Print 1: For D-max
- Test Print 2: 64-gradation by error diffusion processing, 64-gradation by high LPI screen
- Test Print 3: 64-gradation by low LIP screen, 64-gradation by copy reproduction screen
Printer PASCAL Control
Printer
MN-CON
DC-CON
Reader
Read the data of
test patterns.
Output the test
patterns.
Activation
Set the output test print in the reader unit.
Read the test print.
Reader unit
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 (reader unit)
M1
M2
M3
M4
M5
Data output (MN-CON)
M63 M64
Output the test pattern from the main controller.
(3 types)
Printer
Output the data.
100
Reader unit
Printer
Vcont
Density data (reader)
290
300
1.4
1.6
1.7
250
D-max correction