Ricoh D131 Service Manual page 598

2208 Toner Supply Mode
Selects the toner supply mode: Sensor Control or Image Pixel Count.
[0 to 1/0/1]
0: Sensor Control
1: Pixel Count
Select Image Pixel Count only if the TD sensor has failed and cannot be
replaced immediately, so that the customer can use the machine. Return the
setting to Sensor Control after replacing the sensor.
2209 Toner Supply Rate
Adjusts the toner supply rate.
[50 to 2000/850/5 mg per sec]
Increasing this value reduces the time the toner supply clutch remains on. Use
a lower value if the user tends to make many copies that have large areas of
black.
2210 ID Sensor Pattern Interval
Adjusts the time interval between making ID sensor patterns onto the drum for
Vsp/Vsg detection.
[0 to 200/10/1]
Reduce the interval for copies that contain a high proportion of black.
SM Appendix 3-23
SP2000 Drum
D131/D132/D133