1. Check the input area for obstructions such as paper in the path. Also check to see if the registration assembly is damaged or if the transfer roller is out of place. 2. Replace any defective sensors or flags.
3. Ensure the media does not exceed the maximum length.
4. If multiple sheets are feeding, it might be necessary to fan the media and reduce the stack height. Also, replace separation pad.
5. Verify that the fuser is properly installed.