Question about Xerox Phaser 7750DN Laser Printer

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Grainy image quality on my Phaser 7750

I am experiencing poor toner coverage in my Xerox 7750. I have replaced imaging units and toner all with Xerox OEM parts. No joy. Any other possibilities?

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  • mguttery May 15, 2009

    Is a thick brush a good or bad thing?

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  • 2,072 Answers

Try something, Send a job with 5 pages to it.
Shut the machine off as a page it halfway out of the exit area.. Open the machine and look at the jammed copies. Are they clear in the imaging unit areas but not upon exiting the machine?
If the image is clear around the drums and imaging unit, then the problem would be in the fuser. If the image is grainy and fuzzy in the image area, You could have a bad second BTR roller, the soft black roller on the left side door. One of the developer housings could be bad. You have to remove the imaging units and look in the opening with a flashlight to see if the developer housing brush is thick on the developer roll.
Could have a bad transfer belt or one of the color housings could be bad.
Less likely is a bad laser. But have you taken the wand that is on the front cover and cleaned the laser exposure slots?

Posted on May 15, 2009

  • Rick Kasper May 16, 2009

    A thick brush is what you want.

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