The drum unit may be damaged. Put in a new drum unit. See Replacing the drum unit.

Make sure that you use paper that meets our specifications. See About paper .

If you use label sheets for laser printers, the glue from the sheets may sometimes stick to the OPC drum surface. Clean the drum unit. See on Clean the drum unit as follows:.

Do not use paper that has clips or staples because they will scratch the surface of the drum.

If the unpacked drum unit is in direct sunlight or room light, the unit may be damaged.

Clean the primary corona wire inside the drum unit by sliding the blue tab. See Cleaning the corona wire.

Make sure the primary corona wire cleaner is at the home position ().

The drum unit may be damaged. Put in a new drum unit. See Replacing the drum unit.

The toner cartridge may be damaged. Put in a new toner cartridge. See Replacing the toner cartridge.

The fuser unit may be smudged. Call your dealer or Brother Customer Service.

Make sure that the paper or other print media is loaded properly in the paper tray and that the guides are not too tight or too loose against the paper stack.

Set the paper guides correctly. See Printing on plain paper, bond paper or transparencies from Tray 1, 2 or 3.

If you are using the multi-puroise tray, see Printing on plain paper, bond paper or transparencies from the MP tray.

The paper tray may be too full. See Printing on plain paper, bond paper or transparencies from Tray 1, 2 or 3.

Check the paper type and quality. See About paper .

Check the paper type and quality. High temperatures and high humidity will cause paper to curl. See About paper .

If you do not use the printer often, the paper may have been in the paper tray too long. Turn over the stack of paper in the paper tray. Also, fan the paper stack and then rotate the paper 180° in the paper tray.

Make sure that the paper is loaded properly. See Printing on plain paper, bond paper or transparencies from Tray 1, 2 or 3.

Check the paper type and quality. See About paper .

Turn over the stack of paper in the tray or try rotating the paper 180° in the input tray.