Chapter 7
7-3
F-7-2
A. Static Image Formation Block
Forms a static image on the surface of the photosensitive drum.
step 1: primary charging (charges the surface of the drum to an even negative potential)
step 2: laser beam exposure (forms a static image on the surface of the photosensitive drum)
B. Developing Block
Deposits toner over the static image on the surface of the photosensitive drum, thus turning it into a visible image.
step 3: development
C. Transfer Block
Moves the toner image from the surface of the photosensitive drum to print paper.
step 4: primary transfer (moves toner from the surface of the photosensitive drum to the ITB)
step 5: secondary transfer (moves toner from the ITB to paper)
step 6: separation (separates paper from the ITB)
D. Fixing Block
Fuses the toner image to the paper.
step 7: fixing
E. ITB Cleaning Block
Cleans the ITB by removing residual toner.
step 8: ITB cleaning (removes residual toner from the ITB)
F. Drum Cleaning Block
Removes residual toner from the surface of the photosensitive drum to prepare for the next print job.
step 9: drum cleaning (removes residual toner from the surface of the photosensitive drum)
step 10: post-exposure (prevents uneven density by evening out the surface of the photosensitive drum)
7.1.4 Static Image Formation Block
0013-8463
/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880
This block consists of 2 steps, at the end of which a static image is formed on the surface of the photosensitive drum.
At the end, those areas of the surface of the photosensitive drum that have not been exposed by the laser beam (dark area) retain negative charges, while those
exposed by the beam are free of negative charges. The resulting static image is not visible to the human eye and, thus, is called a static "latent" image.
F-7-3
6.separation
7.fixing
Delivery
Pickup
Fixing block
ITB cleaning block
Transfer block
Static image formati
on block
Development
block
Y
ITB
1.primary charging
8.ITB cleaning
2.laser beam
exposure
9.Drum cleaning
Drum
cleaning
block
10.post
-exposure
4.primar
y transfer
4.primar
y transfer
4.primar
y transfer
4.primar
y transfer
3.Development
photosensitive
drum
M
photosensitive drum
C
photosensitive drum
Bk
photosensitive drum
5.secondary
transfer
flow of paper
rotation of ITB/photosensitive drum
Time (t)
Light area
Dark area
laser beam
Laser exposure
(step 2)
Primary transfer
(step 4)
0
-100
-500
Primary charging
(step 1)
Primary charging
(step 1)
Photosensitiv
e dr
um surf
ace potential (V)
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 ...
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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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