Chapter 7
7-28
7.5 Drum Unit
7.5.1 Drum Unit
7.5.1.1 Overview
0014-0776
/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880
The machine uses 4 drum units (Y, M, C, Bk), each consisting of a drum unit, developing cylinder, primary charging roller, and carrier and housed under the ITB.
The machine supplies toner as follows:
The toner coming from the hopper assembly is moved to the toner transport feedscrew A of the drum unit; then, it is moved farther by the toner transport feedscrew
B while being mixed with carrier to reach the developing cylinder. During printing, a layer of toner is formed on top of the layer of carrier deposited on the devel-
oping cylinder; the toner then jumps (toner projection) to the photosensitive drum for development.
The residual toner on the developing assembly after development is scraped off by the cleaning blade, and is moved by the waste toner feedscrew for collection
inside the waste toner case.
The following 3 types of electrical loads are associated with the supply path:
- motor: 2 types (development motor, drum/ITB motor)
- clutch: 1 type (developing sleeve clutch)
F-7-37
[1] Developing cylinder
[2] Photosensitive drum
[3] Waste toner feedscrew
[4] Primary charging roller
[5] Carrier
[6] Toner transport feedscrew A
[7] Toner transport feedscrew B
M1: drum/ITB motor
M2 and M3: development motor
CL1 through CL4: developing sleeve clutch
D-CON
Toner
M1
CL1 4
M2 3
[1]
[2]
[3]
[4]
[5]
[6]
[7]
Содержание iR C2880 series
Страница 1: ...Aug 29 2006 Service Manual iR C3380 2880 Series ...
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Страница 23: ...Chapter 1 Introduction ...
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Страница 53: ...Chapter 2 Installation ...
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Страница 127: ...Chapter 3 Basic Operation ...
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Страница 137: ...Chapter 4 Main Controller ...
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Страница 161: ...Chapter 5 Original Exposure System ...
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Страница 188: ...Chapter 5 5 24 F 5 68 4 Remove the original sensor 2 hook 1 F 5 69 ...
Страница 189: ...Chapter 6 Laser Exposure ...
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Страница 207: ...Chapter 7 Image Formation ...
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Страница 257: ...Chapter 8 Pickup Feeding System ...
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Страница 303: ...Chapter 9 Fixing System ...
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Страница 321: ...Chapter 10 Externals and Controls ...
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Страница 336: ...Chapter 10 10 10 F 10 10 2 Remove the check mark from SNMP Status Enabled ...
Страница 337: ...Chapter 10 10 11 F 10 11 ...
Страница 359: ...Chapter 11 MEAP ...
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Страница 401: ...Chapter 12 RDS ...
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Страница 411: ...Chapter 13 Maintenance and Inspection ...
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Страница 416: ...Chapter 13 13 2 F 13 1 8 9 1 2 3 3 5 6 7 10 11 12 13 14 4 ...
Страница 421: ...Chapter 14 Standards and Adjustments ...
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Страница 431: ...Chapter 15 Correcting Faulty Images ...
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Страница 459: ...Chapter 16 Self Diagnosis ...
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Страница 481: ...Chapter 17 Service Mode ...
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Страница 571: ...Chapter 18 Upgrading ...
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Страница 603: ...Chapter 19 Service Tools ...
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Страница 605: ...Contents Contents 19 1 Service Tools 19 1 19 1 1 Special Tools 19 1 19 1 2 Solvents and Oils 19 2 ...
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Страница 609: ...Aug 29 2006 ...
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