Ricoh D072 Service Manual page 334

Black Line Erase
4942*
Selects the black line erase level. This setting is effective only when originals
are scanned by the DF.
4942 1 [0 = No / 1 = Very weak / 2 = Weak / 3 = Strong]
This setting is applied regardless of what mode has been selected in
SP4-921.
4943* WhitePapDetect BiLv
4943 1 Gray Scale
4943 1 Color2
4943 1 Color3
SM Appendix
System Service Mode (F/SPF: D068/D069)
[0 to 3 / 2 / 1/step]
[0 to 255 / 64 / 1/step]
[0 to 255 / 128 / 1/step]
[0 to 255 / 128 / 1/step]
5-25 D067/D068/D069/D072