Ricoh D131 Service Manual page 1196

DETAILS
6.8.3 SHIFT TRAY LOWER LIMIT DETECTION
[A]
[D]
[B]
B478D010.WMF
[C]
This machine has two shift tray lower limit sensors: shift lower limit sensor [A] (S9)
for large paper (B4 and larger) and shift lower limit sensor [B] (S11) for small paper
(smaller than B4).
NOTE: Sensor [C] (S10) is not used.
When the actuator [D] enters sensor [A] while using large paper (about 1500
sheets are on the tray), a message will be displayed and copying will stop.
When the actuator [D] enters sensor [B] while using small paper (about 3,000
sheets are on the tray), a message will be displayed and copying will stop.
B513/B531 40 SM