Chapter 7
7-15
7.9 Transfer Unit
7.9.1 Outline of the Transfer Unit
7.9.1.1 Outline
0018-9722
iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
The transfer unit [1] consists of the transfer roller and the static eliminator.
The transfer roller rotates in connection with the photosensitive drum.
Bias is applied to the static eliminator so that sheets can be separated from the drum.
F-7-16
7.9.2 Controlling the Transfer Bias
7.9.2.1 Transfer Roller Bias Control
0018-9723
iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
The machine changes the output of transfer bias based on the following conditions.
Environment: 5 settings according to absolute moisture content
Paper type: plain paper, envelope, thick paper, tracing paper, postcard, transparency, bond paper, label sheet
Paper width: size boundaries as defined by 2 points
Source of paper: feeding from cassette, automatic double-sided feeding from cassette, feeding from multi-feeder, i.e., 1st side (half-speed), 2nd side (half-speed)
7.9.3 Cleaning
7.9.3.1 Transfer Roller Cleaning Mechanism
0018-9724
iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
The machine uses the transfer roller cleaning mechanism to return the toner sticking to the transfer roller back to the photosensitive drum by applying a cleaning
bias to the roller.
Once the toner reaches the drum, it is scraped by the photosensitive drum cleaning blade for collection in the waste toner box.
7.9.4 Separation Mechanism
7.9.4.1 Controlling the Static Eliminator Bias
0018-9725
iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
A different level of static eliminator bias is applied depending on the 1st and 2nd side.
Transfer bias:
1000 to 6000 V
Transfer bias for cleaning:
-2600 V
The transfer bias is applied at the time of image formation. A voltage of a specific level is applied between sheets for cleaning of the transfer roller.
1st side:
-2300 V
2nd side:
-3000 V
A DC bias is applied between sheets while an image is being formed. (It is applied until the ongoing job is over.)
Содержание iR3245
Страница 1: ...Jul 3 2008 Service Manual iR3245 3235 3230 3225 Series...
Страница 2: ......
Страница 6: ......
Страница 25: ...Chapter 1 Introduction...
Страница 26: ......
Страница 28: ......
Страница 64: ......
Страница 65: ...Chapter 2 Installation...
Страница 66: ......
Страница 120: ......
Страница 121: ...Chapter 3 Basic Operation...
Страница 122: ......
Страница 124: ......
Страница 128: ......
Страница 129: ...Chapter 4 Main Controller...
Страница 130: ......
Страница 132: ......
Страница 134: ...Chapter 4 4 2 F 4 1 1 5 8 9 11 14 12 3 4 10 2 13 7 15 16 17...
Страница 152: ......
Страница 153: ...Chapter 5 Original Exposure System...
Страница 154: ......
Страница 184: ......
Страница 185: ...Chapter 6 Laser Exposure...
Страница 186: ......
Страница 188: ......
Страница 197: ...Chapter 7 Image Formation...
Страница 198: ......
Страница 227: ...Chapter 8 Pickup Feeding System...
Страница 228: ......
Страница 232: ......
Страница 244: ...Chapter 8 8 12 For iR3245 3235 3230 F 8 14 1 2 3 4...
Страница 261: ...Chapter 8 8 29 10 11 12 13 14 3 1 2 4 5 4 4 1 2 3 5 4 1 2 3 5 5 4 1 2 3 5 4 1 2 3 5...
Страница 278: ......
Страница 279: ...Chapter 9 Fixing System...
Страница 280: ......
Страница 282: ......
Страница 297: ...Chapter 10 External and Controls...
Страница 298: ......
Страница 302: ......
Страница 315: ...Chapter 10 10 13 2 Uncheck SNMP Status Enabled F 10 11...
Страница 342: ......
Страница 343: ...Chapter 11 MEAP...
Страница 344: ......
Страница 346: ......
Страница 397: ...Chapter 12 e maintenance imageWARE Remote...
Страница 398: ......
Страница 400: ......
Страница 408: ......
Страница 409: ...Chapter 13 Maintenance and Inspection...
Страница 410: ......
Страница 412: ......
Страница 424: ...Chapter 13 13 12...
Страница 425: ...Chapter 14 Standards and Adjustments...
Страница 426: ......
Страница 428: ......
Страница 433: ...Chapter 14 14 5 Execute the following in Service Mode ADF white level adjustment COPIER FUNCTION CCD DF WLVL1 2 3 4...
Страница 436: ......
Страница 437: ...Chapter 15 Correcting Faulty Images...
Страница 438: ......
Страница 440: ......
Страница 465: ...Chapter 16 Self Diagnosis...
Страница 466: ......
Страница 468: ......
Страница 493: ...Chapter 17 Service Mode...
Страница 494: ......
Страница 498: ......
Страница 690: ......
Страница 691: ...Chapter 18 Upgrading...
Страница 692: ......
Страница 694: ......
Страница 738: ...Chapter 18 18 44...
Страница 739: ...Chapter 19 Service Tools...
Страница 740: ......
Страница 741: ...Contents Contents 19 1 Service Tools 19 1 19 1 1 Special Tools 19 1 19 1 2 Oils and Solvents 19 1...
Страница 742: ......
Страница 744: ......
Страница 745: ...Jul 3 2008...
Страница 746: ......