Paper End Detection - Ricoh FT5540 Service Manual

31 August 1989

7.2 PAPER END DETECTION

After the last sheet of paper from a cassette has been fed, the Load Paper indicator lights.
Photointerruptors are used for the third and fourth paper end sensors. When either one of the
sensors is actuated, the photointerruptor turns off (0 volts to 5 volts). The CPU detects paper
end by monitoring the output of these sensors.
As with the paper volume and paper size sensors, the CPU uses the same scan pulses to
monitor these sensors.
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