Automatic Feeder Cleaning
If your originals have black streaks or appear dirty after scanning them through the feeder, clean the rollers of the feeder as described below.
For information on the optional products required to use this function, see "Optional Products Required for Each Function."
1.
Press 
(Settings/Registration).
(Settings/Registration).2.
Press [Adjustment/Maintenance] → [Maintenance] → [Clean Feeder].
3.
Place 10 sheets of blank paper into the feeder → press [Start].
Make sure that you fan the sheets of paper well before placing them.
When cleaning is complete, try scanning again.