One of the following situations may be the cause.
Solutions
Place the printer on a flat surface and operate in the recommended environmental conditions.
Environmental Specifications
Use paper supported by this printer.
Available Paper and Capacities
Unavailable Paper Types
Follow paper handling precautions.
Paper Handling Precautions
Load paper in the correct direction, and slide the edge guides against the edges of the paper.
Loading Paper
Make sure the paper size and paper type settings match the actual paper size and paper type loaded in the printer.
Paper Size and Type Settings
Clean the roller.
Improving Paper Feeding Problems for Paper Cassette