Solution
Appropriate paper is not being used.The feeder roller, and the scanning area are dirty.
The fixing unit is dirty.
The toner cartridge is not installed properly.
Appropriate paper is not being used.
Replace the paper with which can be used with this printer.
[ Paper Handling ]
The feeder roller, and the scanning area are dirty.
Clean the feeder roller, and the scanning area.
The fixing unit is dirty.
Clean the fixing unit.
The toner cartridge is not installed properly.
Install the toner cartridge properly.