Canon imageRUNNER ADVANCE C5051 Series Service Manual page 101

2
Technology■>■Image■Formation■System■>■Controls■>■Image■stabilization■control
MEMO:
This■control■creates■4■types■of■patch■patterns■as■follows:
•■ Patch■pattern■for■copy■(64■patches■for■each■color)
•■ Patch■pattern■for■text■(64■patches■for■each■color)
•■ Patch■pattern■for■photo■(64■patches■for■each■color)
•■ Patch■pattern■for■D-max■(64■patches■for■each■color)
Reader
Printer
PASCAL control
2 Technology■>■Image■Formation■System■>■Controls■>■Image■stabilization■control
Patch image date
F-2-97
Output of patch pattern data
Patch pattern is created
Patch patterns (4 types)
are printed on paper
Printed test patterns
are scanned by the reader
(Y)PASCAL correction table
Actual gradation
characteristics
Y63 Y64
100
Output of density data
Ideal gradation
Y2 characteristics
PASCAL correction table is
Y1
created(Y,M,C,Bk)
0
100
Data output（M-CON）
100
Ideal gradation
characteristics
Actual gradation
characteristics
100
0
Data output（M-CON）
2-65
Start
Main controller2
DC controller(UN1)
Patch sensor(Center)(UN49)
Patch scanning
DC controller(UN1)
Main controller2
F-2-98
2-65