
Chapter 8
8-13
F-8-18
F-8-19
T-8-7
F-8-20
2. Potential Control during High Humidity Mode
Related Service Mode
COPIER > OPTION > BODY > CNT-
W/PR (density setting mode on/off
during printing)
0: correct the target value to enable variation of density
during printing. (default)
1: disable the mechanism used to vary the density during
printing.
1
2
3
4
5
6
7
8
9
x0.8
x0.9
x1.0
x1.1
x1.2
x1.3
x1.4
x1.5
x1.5
+40V
+30V
+20V
+10V
F value
Density
Darker
Lighter
The laser power is increased
(to increase the contrast),
thereby enabling reproduction
of fine lines narrower than a
single particle of toner.)
The laser power/developing
bias is corrected to suit the F
value setting.
The laser power has
reached the upper limit,
requiring correction of
the developing bias to
increase the contrast.
Laser power
correction
value
Vdc
correction
value
VD
correction
value
WMUPR
WMUP
STBY
195˚C
200˚C
Potential sensor
Laser
Grid bias
Vg
Vg
Pw
Pw Vdc
VD
VL
Potential determined
The laser power/developing
bias is corrected to suit the F
value setting.
Potential control
sequence started
COPIER > OPTION > BODY > CNT-W/PR
Set
Potential
control
Printing
started
Main power switch
OFF/ON
F value
changed
A laser power output Vdc
suited to the F value setting
is used.
Содержание ImageRunner iR8500 Series
Страница 1: ...Apr 5 2005 Service Manual iR8500 Series ...
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Страница 32: ...Contents ...
Страница 33: ...Chapter 1 Introduction ...
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Страница 99: ...Chapter 2 Installation ...
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Страница 180: ...Chapter 2 2 78 F 2 272 2 1 1 3 ...
Страница 181: ...Chapter 3 Basic Operation ...
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Страница 207: ...Chapter 4 Main Controller ...
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Страница 247: ...Chapter 5 Original Exposure System ...
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Страница 258: ...Chapter 5 5 6 T 5 6 1 Fuse PCB 4 Inverter PCB 2 Reader controller PCB 5 CCD AP PCB 3 Differential PCB ...
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Страница 307: ...Chapter 6 Image Processing System ...
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Страница 319: ...Chapter 7 Laser Exposure ...
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Страница 335: ...Chapter 8 Image Formation ...
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Страница 399: ...Chapter 9 Pickup Feeding System ...
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Страница 649: ...Chapter 14 Standards and Adjustments ...
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Страница 1108: ...Chapter 18 18 28 F 18 45 3 Click Start F 18 46 4 Click Save F 18 47 5 Click OK ...
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Страница 1121: ...Apr 5 2005 ...
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