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)
Summary of Contents for iR C3380 series
Page 1: ...Aug 29 2006 Service Manual iR C3380 2880 Series...
Page 2: ......
Page 6: ......
Page 23: ...Chapter 1 Introduction...
Page 24: ......
Page 26: ......
Page 52: ......
Page 53: ...Chapter 2 Installation...
Page 54: ......
Page 127: ...Chapter 3 Basic Operation...
Page 128: ......
Page 130: ......
Page 136: ......
Page 137: ...Chapter 4 Main Controller...
Page 138: ......
Page 160: ......
Page 161: ...Chapter 5 Original Exposure System...
Page 162: ......
Page 188: ...Chapter 5 5 24 F 5 68 4 Remove the original sensor 2 hook 1 F 5 69...
Page 189: ...Chapter 6 Laser Exposure...
Page 190: ......
Page 192: ......
Page 206: ......
Page 207: ...Chapter 7 Image Formation...
Page 208: ......
Page 256: ......
Page 257: ...Chapter 8 Pickup Feeding System...
Page 258: ......
Page 262: ......
Page 303: ...Chapter 9 Fixing System...
Page 304: ......
Page 306: ......
Page 321: ...Chapter 10 Externals and Controls...
Page 322: ......
Page 326: ......
Page 336: ...Chapter 10 10 10 F 10 10 2 Remove the check mark from SNMP Status Enabled...
Page 337: ...Chapter 10 10 11 F 10 11...
Page 359: ...Chapter 11 MEAP...
Page 360: ......
Page 362: ......
Page 401: ...Chapter 12 RDS...
Page 402: ......
Page 404: ......
Page 411: ...Chapter 13 Maintenance and Inspection...
Page 412: ......
Page 414: ......
Page 416: ...Chapter 13 13 2 F 13 1 8 9 1 2 3 3 5 6 7 10 11 12 13 14 4...
Page 421: ...Chapter 14 Standards and Adjustments...
Page 422: ......
Page 424: ......
Page 431: ...Chapter 15 Correcting Faulty Images...
Page 432: ......
Page 434: ......
Page 459: ...Chapter 16 Self Diagnosis...
Page 460: ......
Page 462: ......
Page 481: ...Chapter 17 Service Mode...
Page 482: ......
Page 484: ......
Page 571: ...Chapter 18 Upgrading...
Page 572: ......
Page 574: ......
Page 603: ...Chapter 19 Service Tools...
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Page 606: ......
Page 609: ...Aug 29 2006...
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