4-6 M3091DC Image Scanner Operation Guide
Eject roller: Gently clean this component, taking care not to roughen
the roller surface. If black foreign matter attaches to the
component, the document feed performance is affected;
therefore, thoroughly clean it.
Paper guide surface (white part): Clean this component gently.
3) Restore the automatic document feeder into position.
After restoring the automatic document feeder
into position, make sure that it is closed
completely. If the automatic document feeder
is not properly closed, a paper jam or reading
error may occur.