Chapter 8
8-18
8.4 Transfer Unit
8.4.1 ETB Unit
0019-8976
The ETB unit transfers toner into paper while feeding the paper.
The ETB unit consists of the ETB, ETB tension roller, ETB feed roller, ETB slave roller, attraction roller, and transfer roller.
The ETB motor (M5) rotates the ETB feed roller, and this drive rotates the ETB. All of other rollers are driven by the ETB.
At the time of printing, the fed paper is attracted to the ETB by the attraction roller, and transported according to the rotation of the ETB. During transportation,
toner is transferred by the photosensitive drum and transfer roller of each color. After the toner is transferred, the paper is separated from the ETB by the ETB feed
roller.
Especially at the time of color printing, high accuracy is requested for paper feeding by the ETB because one image is formed with four color toners overlapped.
The ETB is also used for image stabilization control. When image gradation corrective control or color displacement corrective control is executed, the pattern
image for color displacement or image gradation correction is written on the ETB.
The ETB unit executes the following three major controls.
- Automatic bias control
- ETB cleaning
- Transfer roller engagement/disengagement control
F-8-24
M5
ETB motor
DC controller PCB
ETB motor
control signal
ETB engaged roller
ETB tension roller
ETB
Photosensitive
drum
ETB feed roller
Attraction roller
Transfer rollers
Transfer roller
Summary of Contents for iR C1020 Series
Page 1: ...Sep 8 2008 Service Manual iR C1020 Series iR C1021i ...
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Page 18: ...Contents ...
Page 19: ...Chapter 1 Introduction ...
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Page 57: ...Chapter 2 Installation ...
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Page 73: ...Chapter 3 Basic Operation ...
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Page 81: ...Chapter 4 Main Controller ...
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Page 97: ...Chapter 5 Original Exposure System ...
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Page 113: ...Chapter 6 Original Feeding System ...
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Page 133: ...Chapter 7 Laser Exposure ...
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Page 143: ...Chapter 8 Image Formation ...
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Page 181: ...Chapter 9 Pickup and Feed System ...
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Page 213: ...Chapter 9 9 29 F 9 79 1 2 3 ...
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Page 215: ...Chapter 10 Fixing System ...
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Page 233: ...Chapter 11 External and Controls ...
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Page 263: ...Chapter 12 e maintenance imageWARE Remote ...
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Page 275: ...Chapter 12 12 9 F 12 27 ...
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Page 281: ...Chapter 13 Maintenance and Inspection ...
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Page 287: ...Chapter 14 Measurement and Adjustments ...
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Page 293: ...Chapter 15 Correcting Faulty Images ...
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Page 317: ...Chapter 16 Error Code ...
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Page 331: ...Chapter 16 16 11 ...
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Page 333: ...Chapter 17 Special Management Mode ...
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Page 343: ...Chapter 17 17 7 ...
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Page 345: ...Chapter 18 Service Mode ...
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Page 389: ...Chapter 19 Upgrading ...
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Page 396: ...Chapter 19 19 4 3 Click Next F 19 4 4 Select a USB connected device and click Next F 19 5 ...
Page 397: ...Chapter 19 19 5 5 Click Start F 19 6 6 Click Yes F 19 7 Download will be started F 19 8 ...
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Page 401: ...Chapter 20 Service Tools ...
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Page 407: ...Sep 8 2008 ...
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