Lexmark C920 Service Manual page 139

5056-XXX
After completing the fusing process, paper is discharged from the printer. The delivery sensor detects the paper,
and the FU/FD deflector switches between the face-up and face-down paper delivery.
As the paper passes through the fuser, it pulls down the sensing lever and turns on the delivery sensor. If the
delivery unit remains on longer than specified, the printer controller determines that the printer is jammed.
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Diagnostic aids