Question about Brother MFC 7420 All-In-One Laser Printer
Four dots print going down the middle of page either copy of printed..
toner seems fine, but should I change it to a new one anyway? there is nothing on the glass, etc.
How do I clean white or black spots on printed documents?
First make 10 to 15 copies of a blank, white sheet of paper.
If you still see the spots on printed documents after making multiple copies, clean the drum unit as follows:
The OPC drum is photosensitive so do not touch it with your fingers.
Posted on Feb 02, 2011
Check fusing unit
Posted on Dec 28, 2013
Take the drum cartridge out and look at the drum. lift the flap up and make a copy it will come out black. thew dots will show. if you measue from dot to dot that will be the circumfrence of the drum, either live with it ir replace the drum make sure that you are using brother oen drum and toner, generic toner will ruin the drum good luck brother sr tech
Posted on Jan 24, 2009
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Posted on Jan 02, 2017
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