Please check the following points to solve the problem.

NOTE: Illustrations shown below are from a representative product and may differ from your Brother machine.

• Place your document face up, top edge first in the ADF (automatic document feeder) until you feel it touch the feed roller and the LCD screen changes.
  
• Adjust the paper guides (1) to fit the width of your document.

• Ensure the ADF cover is firmly closed.
  
• Check the paper thickness. If it's thick, use the scanner glass to fax, copy or scan.
  
• Make sure the paper is straight. If the paper is curled, straighten it.
  
• Check the document size and if it's small, use the scanner glass to fax, copy or scan.
  
• Take out any paper from the ADF. Open the ADF cover and check if there is any jammed paper inside.