Ricoh A250 Service Manual page 191

Mode No.
Class Class
1 and 2 3
P - Matrix Filter (Photo)
4-929* 2
P - Edge Threshold -
Vertical
4-931*
P - Edge
Threshold - Horizontal
4-932*
P - Edge
Threshold - Right
4-933*
SM
SERVICE PROGRAM MODE
Function
Selects the dither matrix filter in
photo mode. A larger number
increases the number of gradations,
but may reduce the contrast.
5: Error diffusion (same as matrix No
1 in 4-929-1) - reproduction of fine
lines is emphasized
This adjustment is only effective
for the "Service Mode" original
type setting.
See "Detailed Descriptions - Image
Processing" for details.
Adjusts the threshold for edge
detection in the vertical direction for
dynamic thresholding.
This adjustment is only effective
for the "Text - Service Mode"
original type setting.
If "Dynamic Binary" is selected with
SP4-922-1, this SP mode is
effective. See "Detailed Descriptions
- Image Processing" for details.
Normally do not change the value.
Adjusts the threshold for edge
detection in the horizontal direction
for dynamic thresholding.
This adjustment is only effective
for the "Text - Service Mode"
original type setting.
If "Dynamic Binary" is selected with
SP4-922-1, this SP mode is
effective. See "Detailed Descriptions
- Image Processing" for details.
Normally do not change the value.
Adjusts the threshold for edge
detection in the diagonal direction
from top right to bottom left (for
dynamic thresholding).
This adjustment is only effective
for the "Text - Service Mode"
original type setting.
If "Dynamic Binary" is selected with
SP4-922-1, this SP mode is
effective. See "Detailed Descriptions
- Image Processing" for details.
Normally do not change the value.
4-23
Settings
0: 53
1: 105
2: 143
3: 210
4: 270
5: H
0 ~ 255
1/step
63
0 ~ 255
1/step
63
0 ~ 255
1/step
63
A250