Chapter 5
5-15
5.3.6.7 Shading Correction
0006-5938
iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N /
/ iR4570N / iR2230 / / / iR3530 /
The machine executes this correction for every scan made in main shading
unit. It measures the density of the standard white plate, and compares the
result against the target value stored in the shading correction circuit; the dif-
ference between the two will be held as the shading correction value for use
in correcting variation among CCD pixels when scanning the original, thus
evening out the density levels of the image.
F-5-28
5.4 Parts Replacement Procedure
5.4.1 Copyboard glass
5.4.1.1 Removing the Copyboard Glass
0006-9714
iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N /
/ iR4570N / iR2230 / / / iR3530 /
1) Open the copyboard cover (or ADF).
2) Remove the 2 screws [1], and detach the glass retainer [2]; then, detach
the copyboard glass [3].
F-5-29
When removing the copyboard glass, take care not to touch the following:
- glass surface
- standard white plate
The presence of dirt can cause white/black lines in the images. If dirt is
found, clean it with lint-free paper moistened with alcohol.
F-5-30
5.4.1.2 Removing the ADF Reading Glass
0006-9730
iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N /
/ iR4570N / iR2230 / / / iR3530 /
1) Open the copyboard glass (or ADF).
2) Remove the 2 screws [1], and detach the glass retainer [2].
3) Remove the ADF reading glass [3].
F-5-31
When removing the ADF reading glass, take care not to touch the glass sur-
face.The presence of dirt can cause white/black lines in the images. If dirt is
found, be sure to clean it using lint-free paper moistened with alcohol.
5.4.2 Reader Controller PCB
5.4.2.1 Before Replacing the Reader Controller PCB
0007-0740
iR2270 / iR2870 / iR3570 / iR4570 / / iR2270N / / iR2870N / / iR3570N /
CCD output
Original density
Standard white plate
Characteristics before
Target value
Measurement
Characteristics after co
White
Summary of Contents for iR3570 Series
Page 1: ...Jan 17 2007 Service Manual iR4570 3570 2870 2270 Series...
Page 2: ......
Page 6: ......
Page 27: ...Chapter 1 Introduction...
Page 28: ......
Page 70: ......
Page 71: ...Chapter 2 Installation...
Page 72: ......
Page 146: ......
Page 147: ...Chapter 3 Basic Operation...
Page 148: ......
Page 150: ......
Page 154: ......
Page 155: ...Chapter 4 Main Controller...
Page 156: ......
Page 187: ...Chapter 5 Original Exposure System...
Page 188: ......
Page 217: ...Chapter 5 5 27 F 5 91...
Page 218: ......
Page 219: ...Chapter 6 Laser Exposure...
Page 220: ......
Page 222: ......
Page 230: ......
Page 231: ...Chapter 7 Image Formation...
Page 232: ......
Page 236: ......
Page 280: ......
Page 281: ...Chapter 8 Pickup Feeding System...
Page 282: ......
Page 388: ......
Page 389: ...Chapter 9 Fixing System...
Page 390: ......
Page 419: ...Chapter 9 9 27 F 9 148...
Page 420: ......
Page 421: ...Chapter 10 External and Controls...
Page 422: ......
Page 426: ......
Page 437: ...Chapter 10 10 11 F 10 12 2 Remove the check mark from SNMP Status Enabled...
Page 438: ...Chapter 10 10 12 F 10 13...
Page 440: ...Chapter 10 10 14 F 10 15...
Page 475: ...Chapter 11 MEAP...
Page 476: ......
Page 478: ......
Page 481: ...Chapter 12 Maintenance and Inspection...
Page 482: ......
Page 484: ......
Page 509: ...Chapter 13 Standards and Adjustments...
Page 510: ......
Page 512: ......
Page 521: ...Chapter 14 Correcting Faulty Images...
Page 522: ......
Page 528: ......
Page 537: ...Chapter 14 14 9 43mm s b Z x i j B iR4570_395 s u A B FM2 0287...
Page 538: ...Chapter 14 14 10...
Page 539: ...Chapter 14 14 11...
Page 585: ...Chapter 15 Self Diagnosis...
Page 586: ......
Page 588: ......
Page 623: ...Chapter 16 Service Mode...
Page 624: ......
Page 626: ......
Page 679: ...Chapter 17 Upgrading...
Page 680: ......
Page 682: ......
Page 693: ...Chapter 17 17 11 F 17 18 2 Click Start F 17 19 3 When the session has ended click OK...
Page 698: ...Chapter 17 17 16 F 17 28 2 Click Start F 17 29 3 When the session has ended click OK...
Page 710: ...Chapter 17 17 28 F 17 51 3 Click Start F 17 52 4 Click Save...
Page 712: ...Chapter 17 17 30 F 17 55 2 Select the data to download F 17 56 3 Click Start...
Page 714: ......
Page 715: ...Chapter 18 Service Tools...
Page 716: ......
Page 718: ......
Page 720: ......
Page 721: ...Jan 17 2007...
Page 722: ......