Chapter 8
8-9
8.2.3 D-half Control
0019-5021
imageRUNNER C1022 / imageRUNNER C1022i / Color imageRUNNER C1030 / Color imageRUNNER C1030iF
This control corrects the gradation data based on the halftone density in order to obtain ideal image gradation.
The DC controller executes this control following the command sent from the main controller.
Explanation of operation
1) When receiving a command of executing density measurement from the main controller, the DC controller forms a pattern image for image gradation correction
for each color on the ETB.
The pattern image for image gradation correction is formed with the specified density for each color (low at the left side and high at the right side), using the
optimum developing bias determined by the environment related corrective control.
2) The DC controller sends a color displacement/density LED drive signal and flashes the light emitter (LED) of the color displacement/density sensor.
The color displacement/density sensor is a reflection type sensor located on the upper side of the ETB. It consists of the light emitter (LED) and light receiver
(PD).
3) The light emitted from the light emitter is reflected at the pattern image for image gradation correction and received at the light receiver of the color displacement/
density sensor.
The intensity of the reflected light varies depending on the toner density.
4) The color displacement/density sensor converts the received light into a voltage, and sends it to the DC controller as a density detection signal (analog value).
5) The DC controller converts the received density detection signal into density data, and sends it to the main controller.
6) The main controller performs gradation correction based on the received density data in order to obtain an ideal halftone image.
F-8-14
Error Codes:
E020
Warning: color displacement/density sensor abnormality
When light could not be received by the light receiver, the machine sets an initial value for the image density correction value and displays the error code
on the control panel.
ETB
Color displacement/density sensor (left)
Color displacement/density LED
drive signal
Color displacement/density
sensor (right)
Color displacement/density signal
Pattern image for image gradation correction
DC controller PCB
Main controller PCB
Light emitter (LED)
Light receiver (PD)
Summary of Contents for Color imageRUNNER C1022
Page 2: ......
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Page 19: ...Chapter 1 Introduction ...
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Page 93: ...Chapter 2 Installation ...
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Page 111: ...Chapter 3 Basic Operation ...
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Page 119: ...Chapter 4 Main Controller ...
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Page 135: ...Chapter 5 Original Exposure System ...
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Page 151: ...Chapter 6 Original Feeding System ...
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Page 171: ...Chapter 7 Laser Exposure ...
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Page 185: ...Chapter 8 Image Formation ...
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Page 223: ...Chapter 9 Pickup and Feed System ...
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Page 259: ...Chapter 10 Fixing System ...
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Page 268: ...Chapter 10 10 6 ...
Page 279: ...Chapter 11 External and Controls ...
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Page 311: ...Chapter 12 e Maintenance imageWARE Remote ...
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Page 323: ...Chapter 12 12 9 F 12 27 ...
Page 349: ...Chapter 13 Maintenance and Inspection ...
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Page 355: ...Chapter 14 Measurement and Adjustments ...
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Page 361: ...Chapter 15 Correcting Faulty Images ...
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Page 385: ...Chapter 16 Error Code ...
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Page 399: ...Chapter 16 16 11 ...
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Page 401: ...Chapter 17 Special Management Mode ...
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Page 411: ...Chapter 17 17 7 ...
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Page 413: ...Chapter 18 Service Mode ...
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Page 493: ...Chapter 19 Upgrading ...
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Page 500: ...Chapter 19 19 4 3 Click Next F 19 4 4 Select a USB connected device and click Next F 19 5 ...
Page 501: ...Chapter 19 19 5 5 Click Start F 19 6 6 Click Yes F 19 7 Download will be started F 19 8 ...
Page 504: ...Chapter 19 19 8 4 Select a USB connected device and click Next F 19 12 5 Click Start F 19 13 ...
Page 506: ...Chapter 19 19 10 ...
Page 507: ...Chapter 20 Service Tools ...
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Page 515: ...Appendix ...
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Page 533: ...Oct 29 2010 ...
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