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102
10.2.2. Dark Contrast (Default Value: 1) Adjustment
(1) Enter the Service Mode. (See 9.1.)
(2) Press the "Menu Key" or the "2-Screen Copy Key" until "H8" (Item: Dark threshold value adjustment) appears on the Display
Window.
(3) Press the "Multi-Copy/Stop Key" to enter the threshold setting mode.
(4) Check that the current threshold value is displayed.
Then, press the "Menu Key" or the "2-Screen Copy Key" to change the numerical value to set a new slice level.
Note 1:
As you press the "Menu Key", the numerical value on the Display Window will be decreased.
As you press the "2-Screen Copy Key", the numerical value on the Display Window will be increased.
When "0" is displayed on the Display Window, pressing the "Menu Key" once will make the indication on the Display Window
change to "7".
When "7" is displayed on the Display Window, pressing the "2-Screen Copy Key" once will make the indication on the Display
Window change to "0".
As you press the "2-Screen Copy Key", the numerical value on the Display Window will be increased.
When "0" is displayed on the Display Window, pressing the "Menu Key" once will make the indication on the Display Window
change to "7".
When "7" is displayed on the Display Window, pressing the "2-Screen Copy Key" once will make the indication on the Display
Window change to "0".
Note 2:
Setting contents for each value is as follows.
Threshold level means what percentage (%) of white (256) is set as the slice level.
78%
78%
→ 256 x 0.78 = 200 (rounded off)
84%
→ 256 x 0.84 = 215 (rounded off)
As the threshold level becomes higher, the slice level becomes closer to white.
(This means that print-out condition becomes darker.)
As the threshold level becomes lower, the slice level becomes closer to black.
(This means that print-out condition becomes lighter.)
On the condition of "with emphasizing thin lines", thin and light lines are printed, but eraser sludge and small dots are also
printed.
On the condition of "without emphasizing thin lines", small dots such as eraser sludge are not printed, but it becomes difficult to
print thin and light.
(This means that print-out condition becomes darker.)
As the threshold level becomes lower, the slice level becomes closer to black.
(This means that print-out condition becomes lighter.)
On the condition of "with emphasizing thin lines", thin and light lines are printed, but eraser sludge and small dots are also
printed.
On the condition of "without emphasizing thin lines", small dots such as eraser sludge are not printed, but it becomes difficult to
print thin and light.
(5) Press the "Multi-Copy/Stop Key" to set the new value.
(Also, check that "H8" appears on the Display Window.)
(6) Turn off the power.
Value
Setting Contents
0
Threshold level: 78 % without emphasizing thin lines
1
Threshold level: 84 % without emphasizing thin lines
2
Threshold level: 88% without emphasizing thin lines
3
Threshold level: 90% without emphasizing thin lines
4
Threshold level: 78 % with emphasizing thin lines
5
Threshold level: 84 % with emphasizing thin lines
6
Threshold level: 88 % with emphasizing thin lines
7
Threshold level: 90 % with emphasizing thin lines
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