Ricoh D146 Service Manual page 1232

Corrects low chroman area of rear side.
With Single-Pass duplex models, coloring might change between the front side
and the rear side of the gray half tone area, due to scanning system difference.
if user points out this difference, by changing this setting, difference can be
reduced.
Adjusts intensity of correction depending on coloring difference.
For a side effect, low chroman area's reproducibility will spoil as stronger the
intensity gets.
4797 [Rear Side: Digital AE]
Low Limit Setting
Sets lower limit threshold to detect background when scanning with DF rear.
001
Considers as background when an area of input image is brighter (larger value)
than threshold.
Background Erase Level
002
Sets background level to decide output value of background erase when
scanning with DF rear. As the value enlarges, gets thinner.
4798 [CIS LED Duty]
-
Displays/Saves LED lighting Duty of CIS.
001
Value set with the shipping test of CIS is saved.
Normally do not change setting.
System Maintenance Section
*ENG [0 to 1023 / 364 / 1/step]
*ENG [512 to 1535 / 932 / 1/step]
*ENG [0 to 65535 / 0 / 1/step]
2-513
Main SP Tables - 4
D146/D147/D148/D149/D150