Brother DCP9040CN

Dirt on Paper

User Check

- Check if the paper is loaded into the paper tray correctly.
- Turn over the stack of paper in the paper tray, or try rotating the paper 180° in the paper tray.

Step	Cause	Check	Result	Remedy
1	Fuser unit dirty	Is there dirt around the entrance of the fuser unit	Yes	Clean the entrance of the fuser unit.
		Is the pressure roller ASSY dirty?	Yes	Clean the pressure roller ASSY.
2	Dirt on belt unit electrode	Is the electrode of the belt unit dirty?	Yes	Clean the electrode of the main body and the belt unit.
3	Dirt on waste toner box electrode	Is the electrode of the waste toner box dirty?	Yes	Clean the electrode of the main body
4	Belt unit dirty	Does dirt on the paper disappear after replacing the belt unit with a new one?	Yes	Replace the belt unit.
5	Toner leak from the waste toner box	Is the waste toner box full of toner?	Yes	Replace the waste toner box. Check the near/full sensor ASSY. Or, replace the main PCB ASSY.

Wrinkles

User Check

- Check if the paper is loaded into the paper tray correctly.
- Turn over the stack of paper in the paper tray, or try rotating the paper 180° in the paper tray.

Step	Cause	Check	Result	Remedy
1	Fuser unit failure	Do wrinkles on the paper disappear after replacing the fuser unit with a new one?	Yes	Replace the fuser unit.