Chapter 7
7-22
F-7-29
7.3.9 Color Displacement Correction Control
0013-8493
/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880
The machine performs the following 3 types of control to correct displacement of color possibly caused by differences among components of its laser scanner unit
and drum unit:
- main scanning write start correction
- sub scanning write start correction
- main scanning magnification correction control
The DC controller forms patterns for detection of color displacement for individual colors, and uses the color displacement sensor to detect the position of the pat-
terns.
The DC controller computes the degree of displacement with reference to the position of the pattern detected; based on the result, the DC controller or the main
controller corrects the displacement for individual colors.
Comparison of measurement data (SIN)
and reference data (INT)
Main controller
Data output(V-CON)
Density data(D-CON)
100
20
40
40
Gradation characteristics
after correction
60
Current gradation
characteristics
UN16
Measurement data (SIN) transmission
Patch reading
Start-up
DC controller
Patch pattern formation
DC controller
Data output(D-CON)
Density data(D-CON)
40
20
40
10
INT
SIN
Offset value (alpha) determination
(i.e., difference between SIN and INT)
Main controller
Main controller
Inclusion of result in
D-half correction table
Summary of Contents for iR C3380 series
Page 1: ...Aug 29 2006 Service Manual iR C3380 2880 Series...
Page 2: ......
Page 6: ......
Page 23: ...Chapter 1 Introduction...
Page 24: ......
Page 26: ......
Page 52: ......
Page 53: ...Chapter 2 Installation...
Page 54: ......
Page 127: ...Chapter 3 Basic Operation...
Page 128: ......
Page 130: ......
Page 136: ......
Page 137: ...Chapter 4 Main Controller...
Page 138: ......
Page 160: ......
Page 161: ...Chapter 5 Original Exposure System...
Page 162: ......
Page 188: ...Chapter 5 5 24 F 5 68 4 Remove the original sensor 2 hook 1 F 5 69...
Page 189: ...Chapter 6 Laser Exposure...
Page 190: ......
Page 192: ......
Page 206: ......
Page 207: ...Chapter 7 Image Formation...
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Page 256: ......
Page 257: ...Chapter 8 Pickup Feeding System...
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Page 303: ...Chapter 9 Fixing System...
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Page 321: ...Chapter 10 Externals and Controls...
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Page 336: ...Chapter 10 10 10 F 10 10 2 Remove the check mark from SNMP Status Enabled...
Page 337: ...Chapter 10 10 11 F 10 11...
Page 359: ...Chapter 11 MEAP...
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Page 401: ...Chapter 12 RDS...
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Page 411: ...Chapter 13 Maintenance and Inspection...
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Page 416: ...Chapter 13 13 2 F 13 1 8 9 1 2 3 3 5 6 7 10 11 12 13 14 4...
Page 421: ...Chapter 14 Standards and Adjustments...
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Page 431: ...Chapter 15 Correcting Faulty Images...
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Page 459: ...Chapter 16 Self Diagnosis...
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Page 481: ...Chapter 17 Service Mode...
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Page 571: ...Chapter 18 Upgrading...
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Page 603: ...Chapter 19 Service Tools...
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Page 609: ...Aug 29 2006...
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