Automatic Feeder Cleaning
If your originals have black streaks or appear dirty after scanning them through the feeder, perform an automatic feeder cleaning for the rollers of the feeder.
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].
It takes approximately 15 seconds to clean the feeder.
Use normal LTR size paper.
When cleaning is complete, try scanning again.