Question about Xerox Phaser 7750DN Laser Printer

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Phaser 7750DN Hello all I have a 7750 dn that sometimes makes noise right by the fuser. I replaced the transfer assembly(it was time to) and fuser and it still is noisy. It tends to go away when I press on the fuser door. Also this printer is dumping yellow toner ,it's like it doesn't know when the waste bottle is full. any help would be appreciated.

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That noise is one of the rollers on the lower pinch rolls contacting the plastic frame or the door, unfer the 2nd BTR assembly.. It may not even be there when the machine isnt fully warmed up. There is a spacer kit you can install to create a gap between the roller and cover.
It could also be the clutches for duplex.
Not sure what to tell you with the bottle. Normally that is very accurate. The yellow toner is more likely comming from the yellow toner hopper. There is a fairly thin soft rubber cover over the auger that can slip off easily and leak on any of those toners. I would suspect that before the bottle detection. Full bottle detection is pretty finicky.

Posted on Mar 24, 2008

  • Rick Kasper Mar 24, 2008

    Install the Noise Cover Support Kit 655N102 which will prevent Left Cover warping.
    Instructions are attached.

    NOTE: The kit supplies enough parts to repair 6 machines.

  • Rick Kasper Mar 24, 2008

    Squeaking noise emanating from the Fuser Assembly. Problem goes away by replacing the Fuser. In this case, the Fuser had run only 1/4 of its rated life.


    Black idler rollers (4 rollers at the fuser exit area) are not rotating, or binding, or had fallen out of the brass spring brackets which hold them.


    Fixed! Did not fix.

    End for end these idler rollers, clean with Film Remover, or exchange roller with another from a defective Fuser Assembly.



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Solution 2: Try different paper. The paper may be too weak to pass through the hot fuser, and this doesn't matter you are always using the same paper company, sometimes they change their suppliers.

Follow the link below and good luck.,/?St=299,E=0000000000024640321,K=7426,Sxi=18,Case=obj(20159)

Also check this link if there is a grinding noise as well as the jam.,/?St=299,E=0000000000024640321,K=7426,Sxi=18,Case=obj(21995)

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If you need a fan, Go onto google. Type in ( the parts drop) not parenthesise.and call them, Ask for Britt, I dont work for them, but they are 100 percent professional and will charge you a fair price.
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