Ricoh D129 Service Manual page 292

4673 Black Level Adj. Display
Factory Setting: RE Color
[0 to 16383 / 0 / 1 digit ]
001
Displays the factory setting value of the 2nd black offset level rough
adjustment for the even red signal in the SBU (color printing speed).
Factory Setting: RO Color
[0 to 16383 / 0 / 1 digit ]
002
Displays the factory setting values of the 2nd black offset level rough
adjustment for the odd red signal in the SBU (color printing speed).

RE: Red Even signal, RO: Red Odd signal
4674 Black Level Adj. Display
Factory Setting: GE Color
[0 to 16383 / 0 / 1 digit ]
001
Displays the factory setting value of the 2nd black offset level rough
adjustment for the even green signal in the SBU (color printing speed).
Factory Setting: GO Color
[0 to 16383 / 0 / 1 digit ]
002
Displays the factory setting values of the 2nd black offset level rough
adjustment for the odd green signal in the SBU (color printing speed).

GE: Green Even signal, GO: Green Odd signal
SM 5-33
Main SP Tables-4
D129/D130