2-32 Phaser 7400 Color Printer Options Service ManualDuplex sensors include:■ Duplex Entrance SensorDetects the leading edge of the media and signals the Duplex Motor to beginrotation in the forward direction.■ Duplex Reverse SensorDetects media in the lower portion of the Duplex Unit and signals the DuplexMotor to reverse rotation.■ Duplex Front and Rear SensorsMonitor media transport through the upper portion of the Duplex Unit.Optional Tray SensorsThe paper supply and path for the optional trays involve these sensors (see page 5-133for detailed illustrations and sensor location):■ Door C Detect SensorDetects presence of media in the tray based on the position of the Actuator.■ Registration SensorThis sensor detects media as it arrives at the Registration Rollers.■ Feed-Out SensorThis sensor detects the media as it leaves the Tray 3 Feed Rollers.■ No Paper SensorThe actuator lowers as print media is used in the tray. When the actuator lowersto a pre-determined position, it blocks the sensor to trigger a low paper status.
