3-76 Service Manual
7462
Media level sensing
The media level for the media tray assembly is triggered by the actuator flag positioned in the two
photointerrupter sensors in the pick arm bracket assembly. The actuator flag blocks and unblocks the two
sensors in different sequence; it determines whether the paper tray is empty, low, or full.
Note: Media level sensing through sensor blocking sequence
Pick motor
The pick motor is activated to provide downward force at the pick roll through the pick arm gear train.
Sensor A & B
The photointerrupter sensors send signals to the engine; the media level status is empty, low, or full. An actuator
flag triggers the sensor by blocking it.
Sensor (pass-thru)
A photointerrupter sensor with a built-in flag that sends a signal to the engine where the media from the input
tray passes. This will trigger the pick arm to pick the next media.
250-sheet tray Sensor A Sensor B
Tray full unblocked unblocked
Tray low blocked unblocked
Tray empty blocked blocked
550-sheet tray Sensor A Sensor B
Tray full unblocked blocked
Tray low blocked blocked
Tray empty blocked unblocked
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