Ricoh A217 Service Manual page 35

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SP MODE
Mode No.
Class 1
Class 2
4905
1
Path setting
(MSU video in)
4907 *
GA4 Setting
(Auto
letter/photo
separation)
4909 *
1 *
GA4 Setting
(Pulse Width
Modulation)
2 *
GA4 Setting
(Line Width
Correction 1 :
White
3 *
GA4 Setting
(Line Width
Correction 1 :
Black
4909 *
4 *
GA4 Setting
(Line Width
Correction 2 :
White
5 *
GA4 Setting
(Line Width
Correction 2 :
Black
6 *
GA4 Setting
(Error Diffusion
Gamma)
7 *
GA4 Setting
(Edge Detection
1)
8 *
GA4 Setting
(Edge Detection
2)
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Do not change the value.
Do not change the value
Selects whether the auto letter/photo
separation is performed in the
Letter/Photo mode or not.
Test purposes only
Decides the threshold level for
selecting the type of pulse width
modulation that is used.
Do not change the value.
Decides the threshold value for a
pixel to be white when line width
correction type 1 is performed.
Do not change the value.
Decides the threshold value for a
pixel to be black when line width
correction type 1 is performed.
Do not change the value.
Decides the threshold value for a
pixel to be white when line width
correction type 2 is performed.
Do not change the value.
Decides the threshold value for a
pixel to be black when line width
correction type 2 is performed.
Do not change the value.
Selects the gamma type for error
diffusion.
Do not change the value.
Decides the threshold value to
calculate the difference value
between the object pixel and the
surrounding pixels.
Do not change the value.
Decides the threshold value for
detecting the edge area.
Do not change the value.
32
Function
14 August 1997
Settings
2: 140-line
3: 180-line
0
Disabled
Enabled
0 ~ 255
1 /step
32
0 ~ 255
1 /step
48
0 ~ 255
1 /step
208
0 ~ 255
1 /step
60
0 ~ 255
1 /step
192
0 ~ 7
1 /step
0
0 ~ 255
1 /step
16
0 ~ 255
1 /step
128

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