Chapter 5
5-18
5.3.6 Image Processing
5.3.6.1 Overview
0019-4661
iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
The functions of image processing system’s PCB are described below.
The machine uses the reader controller PCB to process images for every single image line. Specific functions are as follows.
1) CCD PCB (inside CCD unit)
- CCD drive
- CCD output gain correction, offset correction
2) Reader controller PCB
- Shading correction
F-5-27
5.3.6.2 CCD Drive
0019-4662
iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
The machine's CCD sensor is a 4-line linear image sensor consisting of 7500 pixels. After completion of photoelectric conversion in the light-receiving block, the
signals are output to the analog front end PCB unit on CCD PCB in parallel for each channel (R, G, B, B/W) of the CCD array.
F-5-28
5.3.6.3 Gain Correction and Offset Correction of CCD Output
0019-4663
iR3225 / iR3225N / iR3235 / iR3235N / iR3245 / iR3245N
The analog video signal generated by the CCD is corrected so that it will have a specific level (gain correction); moreover, the output voltage occurring in the ab-
sence of incident light is also corrected so that it will have a specific level (offset correction).
- Reader controller PCB
CCD drive, analog image process, A/D conversion, shading correction (executed per each job), shading adjustment (executed at
power-on)
- CCD PCB
Analog image process, A/D conversion
CCD(4lines
)
Analog image
signal
Analog image
process
- gain correction
- offset
correction
A/D
conversion
CCD drive
control
CCD/AP PCB
CCD
control
signal
Gain
correction
data
Digital
image
signal
Reader controller PCB
CCD PCB
Digital image
signal
J1
EEP-ROM
SRAM
CPU
Shading
correction/
adjustment
ASIC
Light-receiving block
H
L
L
H
H L
H
L
H
H L
Output
Red(R)line
Green(G)line
Blue(B)line
Black & white(B/W)line
Expanse
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: ......