Sharp AR-156 Operation Manual page 33

With the RSPF, pull out the reversing tray to remove the misfed original.
With the RSPF, after removing the misfed original from the exit area, be sure to
insert the reversing tray into the exit area until it locks in place.
(C) If the original does not move easily into the exit area remove it in the direction of the arrow
while rotating the knob.
A number may appear in the display after a minus sign, indicating the number
of the originals that must be returned to the document feeder tray.
Clear the misfeed and return the required number of originals. Then press the
print ( ) key to resume copying.
MISFEED REMOVAL
Roller rotating knob
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