Ricoh Di-C1 Manual page 340

Punch Waste Hopper Full Detection
Agitator Plate
An actuator is attached to the rear edge of the agitator plate. This
plate keeps the punch waste in the hopper level.
When the punch motor rotates forward and in reverse to punch
the paper, the agitator plate is also moved from right to left.
If the punch full sensor does not detect the movement of the
actuator for a set time, the machine decides that the punch
hopper is full.
Slide 340
The punch hopper full sensor checks the actuator at initialization and while
the punch unit is active.
If the punch hopper is not set in the punch unit and the punch full sensor
does not detect the actuator after a set time at power on, the machine also
decides that the punch hopper is full.
There is no punch hopper set sensor. If the waste hopper is not in the
machine when you turn the power on, the machine will not detect the
actuator, and will display 'punch waste hopper full'.
Two/four hole punch unit: The punch motor changes direction between
sheets. This is so that the actuator can move back across the punch waste
hopper. It is driven by the same motor, and if the motor turns in the same
direction for a long time (during a long job), punch waste can build up without
being detected.
Actuator
Punch Hopper
Full Sensor
340
Di-C1 Training