Canon imageCLASS LBP6780dn Service Manual page 49

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Technology > Pickup Feeding System > Jam Detection > Duplex re-pickup jam
■ Internal stationary jam 2
When either of the sensors (TOP Sensor, Paper Width Sensor, Fixing Delivery Sensor,
Duplex Sensor or PF Paper Feed Sensor) on the paper delivery path detects presence of
paper at the completion of printing, it is judges as a internal stationary jam 2.
■ Door open jam
When detecting the open door during paper feed, it is judged as a door open jam
■ Fixing paper wrapping jam
When absence of paper is detected by the Delivery Sensor while the area between 20mm
from the leading edge and 20mm from the trailing edge passes the Delivery Sensor, it is
judged as a fixing paper wrapping jam.
■ Duplex re-pickup jam
When the leading edge of paper is not detected within the specified period of time by the
Duplex Sensor after the paper starts to be reversed, it is judged as a duplex re-pickup jam.
2 Technology > Pickup Feeding System > Jam Detection > Duplex re-pickup jam
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