There are 3 things to be checked. 1: toner cartridge,try replacing it with a new on. 2: Transfer roller w/c underneath the toner cartridgelying on the printer. Removed toner cartridge,you see a roller w/c is foam like outlook,wipe it with clean dry lint free cloth or paper towel. 3: Fuser unit w/c fuse the ink on the paper.It is lacoted at the back of the machine.Remove the bottom rear cover,just by pulling it. Then you will see 2 blue color lever on left & right,turn those levers up to unlock the fuser unit,then pull out the unit. taking a look in the inner part of the unit you will see rollers . Any bad coating or damage on the roller will create smears on the prints.
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