Ricoh Aficio MP C3001 Service Manual page 1384

Input and Output Check
Table 1: Paper Height Sensor
0: Deactivated, 1: Activated (actuator inside sensor)
Remaining paper
Full
Nearly full
Near end
Almost empty
D086/D087
Paper height sensor 1
0
1
1
0
3-404
Paper height sensor 2
0
0
1
1
SM Appendix