Follow these steps if the document feeder does not pick up pages correctly or produces skewed output.
Lift the document-feeder latch.
Open the document-feeder cover.
Remove any visible lint or dust from each of the feed rollers and the separation pad using compressed air or a clean lint-free cloth moistened with warm water.
Close the document-feeder cover.
Verify that the latch on the top of the document-feeder cover is completely closed.