Ricoh D093 Service Manual page 627

4973 Scan Correction
This SP turns on image adjustment feature that corrects slight misalignment of
the image at the joints of the CIS elements.
[0 to 2 / 2 / 1]
0: No adjustment
1: Simple adjustment at joints
2: Gradation adjustment at joint
4975 Prevent Original Falling
This SP determines whether the machine stops and holds the edge of the original
after the original is fed so that it does not fall.
[0 to 1/0/1]
0: Disable, 1: Enable
4979 Scan Correction DFU
SM Appendix 2-105
SP4-xxx Scanner
D093/D094