Question about Brother MFC-9420CN All-In-One Laser Printer

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Blank lines on right side of paper on brother 9420 mfc

I have just replaced the fuser unit that was pitted and still have a line of white lines running down the right margin of the paper, any suggestions. The OPC belt still has 94% life on it according to the menu readout.

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  • ckmayeaux Jan 12, 2009

    I did lift the cover on the glass laser and cleaned it and checked cartridges, still have a line on the left side of the page running the full length of the text, not sure what to do next

  • ckmayeaux Jan 12, 2009

    I took out the cartridges and openned that small black door on the bottom of the unit, but I really did not see a glass, it only looks like a small track to me. Which I tried to clean with a soft cloth.

    Funny, the instruction sticker down there says to not swing the door back to open but that it would open from the back moving forward, mine is just the opposite, it only open to the back (center) of the unit.

    Am Iooking in the right place for the laser glass, do I need to open something else to actually find the glass. Also, how do I run a test page to see if it is resolved?

    I really appreciate your willingness to help.



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If it does this on all colors, try cleaning the laser **** glass located below toner cartridges. you could have drops of toner on it. if only certain colors, visually check your toner cartridge rollers.


Posted on Jan 09, 2009

  • Ray M. Jan 12, 2009

    you cleaned laser glass and NOT scanner glass, right? i didn't mean glass on top of machine. do an internal test print, not a copy or fax. is it on the internal prints? if so, and you think you might not have cleaned the laser glass, try that. otherwise, i'm not sure.




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