Gestetner B003 Service Manual page 232

SERVICE PROGRAM MODE
SP4 Mode Number
4903* 73* Edge Detection Threshold
Value: Text/Photo
75* Line Width Correction:
Generation Mode
76* Line Width Correction
Threshold (Main Scan)
77* Line Width Correction
Threshold (Sub Scan)
4904* IPU Setting 1
2* Gradation Processing
Selection
B003/B004/B006/B007
Function and [Setting]
Selects the threshold value for edge detection
for the text/photo mode (65%~154%).
[0~8 / 4 / 1 step]
Selects how line widths are corrected in the
copied original mode for both the main and sub
scan direction.
In copied original mode, lines may bulge in the
main scan direction. Adjust until result is
satisfactory.
[0~15 / 8 / 1 step]
Value Main Scan Line
Correction
1 None
2 None
3 None
4 None
5 Very thin
6 Very thin
7 Very thin
8 Thin
9 Thin
10 Thin
11 Thin
12 Thick
13 Thick
14 Thick
15 Thick
Selects the threshold for line width detection in
the main scan direction in the copied original
mode.
[0~5 / 1 / 1 step]
Low: More difficult to thicken thin lines.
High: Easier to thicken thin lines.
Selects the threshold for line width detection in
the sub scan direction in the copied original
mode.
[0~5 / 1 / 1 step]
Low: More difficult to thicken thin lines.
High: Easier to thicken thin lines.
Selects the size of the dither matrix for the photo
mode.
[0~4 / 2 / 1]
Value Method
0 Error Diffusion
1 Dither 8 x 8
2 Dither 8 x 8
3 Dither 6 x 6
4 Dither 4 x 4
5-26
Sub Scan Line
Correction
Thin
Very thin
Thick
None
Very thin
Thin
Thick
None
Very thin
Thin
Thick
None
Very thin
Thin
Thick
Lines Effect
Best resolution
75 Screening
106 Best grayscale
142 Good grayscale
212 Good resolution
SM