Oce 3121 Technical & Service Manual page 496

Releasing the ramp
The ramp is released, when the cassette is withdrawn: in stand-by.
Detecting the level of copy paper
The ramp rises gradually as the paper depletes. Together with the ramp, the
segment also rises. This moves a vane through the sensors Q1606 and Q1607.
vane
Position of the ramp
Segment and sensors
d) Monitoring the stock of paper in the upper cassette
ed.1
ramp
Cassette is full
pick-up roller
P ick-up roller
Paper
C opy paper
ramp
The upper cassette
(upper cassett
Cassette is empty
Q1607
Q1606
The position of the segment when the
cassette is full
G ear w hen the cassette is full of
pick-up roller
P ick-up roller
Paper
C opy paper
ramp
vane
Light blocking
plate
12 Paper trays 515