Oki ES3640MFP Component Replacement Manual page 22

Tray 1 - Universal Feed Tray
• Level Sensor - The Level Sensor uses an actuator to determine whether paper in the
tray is lifted to the optimum feeding position. When the flag of the actuator leaves
the sensing area, the sensor detects that the paper has been lifted.
• Feed-Out Sensor - The Feed-Out Sensor detects a paper jam in the tray by the paper
position and sensor transition time.
• No Paper Sensor - The No Paper Sensor uses an actuator to determine whether the
tray is empty. When the actuator lowers, the No Paper Sensor signal goes High
indicating an empty tray.
• Feeder Board - The Feeder Board communicates sensor information to the Motor
Driver Board.
Tray 1 Feed Unit
Feeder Board
Paper Level Sensor
No Paper Sensor
Feed Out Sensor