Ricoh B264 Service Manual page 295

4903 64* Independent Dot Erase: Generation Copy
4903 65 to 4903 69, Background Erase Level
The following 5 SP modes adjust the threshold for background erase in originals
scanned in different modes. A higher setting reduces more dirty background, but a
very high setting can cause the image to reverse or cause other unexpected
results. For all these modes, 0 = off (default).
4903 65* Background Erase Level: Text Mode
4903 66* Background Erase Level: Photo Mode
4903 67* Background Erase Level: Text/Photo Mode
4903 68* Background Erase Level: Light Original
4903 69* Background Erase Level: Generation Copy
4903 75 to 4903 77, Line Width Correction
4903 75: Determines whether line thickness is adjusted in the main and/or sub
scan direction. Enter the appropriate number with the 10-key pad then press 
4903 76 and 4903 77: Select the threshold for line width detection in originals
copied in the Generation Copy mode. Higher numbers make it easier to thicken
thin lines.
4903 75* Line Width Correction: Generation Mode
4903 76* LWC Threshold (Main Scan): Generation Mode
4903 77* LWC Threshold (Sub Scan): Generation Mode
4903 79 to 4903 93, Filter Strength: Edge, Filter Adj.: Edge Detection, Filter Adj.:
Magnification ( 6.5)
The following 15 SP modes modify the effects of the MTF filter coefficients set by
SP 4903 39 to 4903 52. The related SP mode is in parenthesis in the right column.
See page 6-28for details about how they work.
4903 79* Filter Strength: Text/Photo (Edge) 25-64%
4903 80* Filter Adj.: Text/Photo (Edge Det.) 25-64%
4903 81* Filter Adj.: Text/Photo (Mag.%) 25-64%
4903 82* Filter Strength: Text/Photo (Edge) 65-154%
4903 83* Filter Adj.: Text/Photo (Edge Det.) 65-154%
4903 84* Filter Adj.: Text/Photo (Mag.%) 65-154%
4903 85* Filter Strength: Text/Photo (Edge) 155-256%
Filter Adj.: Text/Photo (Edge Det.) 155-256%
4903 86*
4903 87* Filter Adj.: Text/Photo (Mag.%) 155-256%
4903 88* Filter Strength: Text/Photo (Edge) 257-400%
4903 89* Filter Adj.: Text/Photo (Edge Det.) 257-400%
Filter Adj.: Text/Photo (Mag.%) 257-400%
4903 90*
4903 91* Filter Strength: Photo (Edge)
4903 92* Filter Adj.: Photo (Edge Det.)
4903 93* Filter Adj.: Photo (Mag.%)
SM
SERVICE PROGRAM MODE TABLES
[0~15 / 8/ 1 step]
[0~255 / 0 / 1 step]
[0~255 / 0 / 1 step]
[0~255 / 0 / 1 step]
[0~255 / 0 / 1 step]
[0~255 / 0 / 1 step]
0: None, 1: Thin,
2: Thin, 3: Thick
[0~5 / 1 / 1 step]
[0~5 / 1 / 1 step]
[0~3 / 3 / 1] (SP4903 039)
[0~15 / 3 / 1] ] (SP4903 039)
[0~15 / 12 / 1] (SP4903 039)
[0~3 / 3 / 1] (SP4903 043)
[0~15 / 3 / 1] (SP4903 043)
[0~15 / 12 / 1] (SP4903 043)
[0~3 / 3 / 1] (SP4903 047)
[0~15 / 3 / 1] (SP4903 047)
[0~15 / 12 / 1] (SP4903 047)
[0~3 / 3 / 1] (SP4903 051)
[0~15 / 3 / 1] (SP4903 051)
[0~15 / 12 / 1] (SP4903 051)
[0~3 / 2 / 1] (SP4903 036)
[0~15 / 0 / 1] (SP4903 036)
[0~15 / 15 / 1] (SP4903 036)
5-31 B264/B265