Ricoh D131 Service Manual page 660

4799 CIS TEST Pattern
1 Select
[0 to 4 / 0 / 1]
2 Even Output Level Setting
[0 to 1023 / 512 / 1 digit]
3 Odd Output Level Setting
[0 to 4095/0/1]
4800 DF Density Adj Value DFU
1 RED [0 to 255 / 94 / 1 digit]
2 GREEN [0 to 255 / 91 / 1 digit]
3 BLUE [0 to 255 / 85 / 1 digit]
4802 Scanner Free run
1 DF mode :Lamp Off
Execute the scanner free run with the lamp off.
2 DF mode :Lamp On
Execute the scanner free run with the lamp on.
4804 Home Position Operation
Executes the homing movement of the scanner carriage unit.
SM Appendix 3-85
SP4000 Scanner
D131/D132/D133