Ricoh FT5034 Service Manual page 20

3. Paper End Detection and Paper Size Detection
1) Paper End Detection
This machine uses a photointerrupter
sensor for paper end detection. The paper
end actuator, which is on the same shaft as
the paper end feeler, pivots into the sensor.
2) Paper Size Detection
Paper size is detected by an array of five
photointerrupters in the cassette entrance.
The paper size sensors are actuated by a
plate on the front of the cassette. Each
paper size has its own unique combination
of notches in the actuator plate.
(For the front loading feed station, if paper
is detected, the copier automatically
detects A3 size. The A3 cassette has a
paper size actuator in case it is used in the
1st or 2nd feeding station for some reason.)
Size Detection Code
A3 B4
1
2
3
4
5
Detected:
Not detected:
Other sizes are indicated as
operation panel.
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A4 A4R B5 B5R
Paper Size Sensor
Actuator Plate
A5 A5R B6 B6R
on the