Oki B930 Service Manual page 35

This TRAY 3/4 PAPER SIZE SWITCH switches for setting the size of paper supplied from
each Paper Cassette. A signal indicating the set size is transmitted as a voltage to the
PWBA MCU F.
NO PAPER SENSOR
If paper runs out in the Paper Cassette, the ACTUATOR lowers and the flag of the ACTUA-
TOR that has stayed in the NO PAPER SENSOR sensing area leaves there. Thus, the light
of the sensor is transmitted. When the sensing area is blocked (paper is present), the signal
becomes OFF.
LEVEL SENSOR
This sensor detects, by the ACTUATOR position, whether paper in the Paper Cassette is
lifted. When the flag of the ACTUATOR leaves the LEVEL SENSOR sensing area, the sen-
sor detects that the paper has been lifted.
PRE FEED SENSOR
This sensor detects a paper jam in the Paper Cassette by the paper position and sensor ON/
OFF time.
The sensor ON/OFF states can be monitored by paper passing through the PRE FEED
SENSOR sensing area.
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