Check the following points to resolve the issue:
-
Make sure the two grey levers inside the back cover are in the up position.
-
Make sure the media type setting in the printer driver matches the type of paper you are using.
-
Choose the Improve Toner Fixing mode in the printer driver. If this selection does not provide enough improvement, change the printer driver setting Media Type to a thick setting. If you are printing an envelope, choose Env. Thick for the media type setting.