Brother printer leaving excess toner on edge of paper

[Scrod fisher]

I have a Brothers MFC-8910DW printer. It started leaving excess toner on the left side of the paper, in 3 spots, equally spaced. I believe the roller has excess toner but cannot find the rollers.

 

[The Hat]

Would this be of any use to you..

Cleaning the Drum Unit

1) Turn off the power switch and unplug the power cord.

2) Remove the drum unit from the printer.

3) Clean the primary corona wire inside the drum unit by gently sliding the wire cleaner

(blue tab) to the right end and left end several times.

4) Return the cleaner to the home position.