Chapter 8
8-20
8.4.3 ETB Cleaning
0019-8978
imageRUNNER C1022 / imageRUNNER C1022i / Color imageRUNNER C1030 / Color imageRUNNER C1030iF
The ETB is used not only to transfer the toner on the photosensitive drum to the paper but also to write a pattern image for correction for image stabilization control.
If the toner which is not transferred to the paper remains on the ETB, it causes stain on the back of paper.
In this control, the ETB surface is cleaned by placing the residual toner on the ETB back to the photosensitive drum electrostatically.
The ETB cleaning is executed by the DC controller at the following timing.
- At power-on
- Before and after the execution of color displacement corrective control
- Before and after the execution of image gradation corrective control
- When the front cover is closed
- After printing is performed when the universal-size paper is specified
Negative charged toner and positive charged toner remain on the ETB.
When ETB cleaning starts, the DC controller sets the potential of the photosensitive drums for magenta (M) and yellow (Y) to 0, using the bias of the primary
charging roller. The photosensitive drums for cyan (C) and black (Bk) are changed negative.
For the transfer roller for each color, a positive or negative DC bias is applied as shown in the figure below.
Since potential difference occurs between each photosensitive drum and ETB, the residual toner is reverse-transferred to the photosensitive drum. The negative
charged toner is adhered to the photosensitive drums for magenta (M) and yellow (Y), and the positive charged toner is adhered to the photosensitive drums for
cyan (C) and black (Bk).
The toner adhered to the photosensitive drum is scraped by the cleaner blade and collected into the waste toner container.
F-8-26
Negative potential waste toner
Positive potential waste toner
M toner cartridge
C toner cartridge
Y toner cartridge
Bk toner cartridge
DC negative bias
DC positive bias
DC negative bias
DC
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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