Chapter 7
7-10
4: OFF
7.4.7 Adjusting the Density in Various Modes
0009-3546
The machine corrects the development bias determined as a result of potential control for the following operating modes, and uses the result as the target
value for the individual modes:
1. Density Adjustment for Copying
Purpose: to obtain the density suited to the user's needs.
Method of correction: uses the developing bias and image processing (binary density processing) according to the F-value setting
2. Density Adjustment for Printing
Purpose: to obtain the density suited to the user's needs.
Method of correction: uses the developing bias and image processing (thickening) to suit the F-value setting.
Adjusting the Density for Copying
The machine increases the developing bias to decrease the copy density. If increased in excess, the bias can cause light images; if decreased in excess, on
the other hand, the background can developing fogging. In light of this, the machine executes density processing using changes in the developing bias and
image processing (binary density processing).
T-7-5
Adjusting the Density for Printing
The machine increases the developing bias to increase the print density. If increased in excess, the background can develop fogging. At the lower limit of
the developing bias, the machine uses the changes in the developing bias and image processing (thickening processing) to ensure appropriate density.
T-7-6
*1: Thickening processing may be enabled for all F values in user mode ('correct fine line').
F value
Developing DC bias standard value
(V)
Shift (V)
Image processing
Image density
1
240
60
yes lighter
2
220
40
no
3
180
0
no
4
140
-40
no
5
120
-60
yes
darker
F value
Developing DC bias standard
value (V)
Shift (V)
Thickening*1
Image
density
1
218
48
no
light
2
205
35
no
3
194
24
no
4
182
12
no
5
170
0
no
6
153
-17
no
7
137
-33
no
8
120
-50
no
9
120
-50
yes
dark
Summary of Contents for iR5570 Series
Page 1: ...Mar 29 2005 Service Manual iR6570 5570 Series ...
Page 2: ......
Page 6: ......
Page 26: ...Contents ...
Page 27: ...Chapter 1 Introduction ...
Page 28: ......
Page 30: ......
Page 55: ...Chapter 2 Installation ...
Page 56: ......
Page 58: ...Contents 2 9 3 Mounting the Cassette Heater 2 34 ...
Page 98: ......
Page 99: ...Chapter 3 Basic Operation ...
Page 100: ......
Page 102: ......
Page 110: ......
Page 111: ...Chapter 4 Main Controller ...
Page 112: ......
Page 114: ......
Page 135: ...Chapter 5 Original Exposure System ...
Page 136: ......
Page 181: ...Chapter 6 Laser Exposure ...
Page 182: ......
Page 184: ......
Page 192: ......
Page 193: ...Chapter 7 Image Formation ...
Page 194: ......
Page 198: ......
Page 259: ...Chapter 8 Pickup Feeding System ...
Page 260: ......
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Page 351: ...Chapter 9 Fixing System ...
Page 352: ......
Page 401: ...Chapter 10 External and Controls ...
Page 402: ......
Page 406: ......
Page 448: ......
Page 449: ...Chapter 11 MEAP ...
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Page 452: ......
Page 455: ...Chapter 12 Maintenance and Inspection ...
Page 456: ......
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Page 468: ......
Page 469: ...Chapter 13 Standards and Adjustments ...
Page 470: ......
Page 505: ...Chapter 14 Correcting Faulty Images ...
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Page 508: ......
Page 537: ...Chapter 15 Self Diagnosis ...
Page 538: ......
Page 540: ......
Page 565: ...Chapter 16 Service Mode ...
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Page 568: ......
Page 633: ...Chapter 17 Upgrading ...
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Page 641: ...Chapter 17 17 5 F 17 4 HDD Boot ROM Flash ROM System Software ...
Page 646: ...Chapter 17 17 10 F 17 11 8 Click START F 17 12 ...
Page 675: ...Chapter 17 17 39 F 17 59 2 Select the data to download F 17 60 3 Click Start ...
Page 677: ...Chapter 18 Service Tools ...
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Page 683: ...Mar 29 2005 ...
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