20 Most Recent Xerox Phaser 7750GX Laser Printer Questions & Answers

If it is only happening in black then it has to be something prior to the toner reaching the transfer belt; such as toner, developer, imaging unit, or laser. It sounds like you've already cleaned the laser window, replaced the toner, and image unit, so I would inspect the developer. Remove the black image unit and use a flashlight to inspect how well toner is covering the magnetic roller on the developer. You may want to compare it to a developer of a working color to see if they look similar. Also, make sure there are no foreign objects near where the image units go. If an object came loose in there, the arm will not close correctly which could cause the image unit to not make contact with the developer. Hope this helps, and thanks for using Fixya.

Xerox Phaser... | Answered on Sep 20, 2011

Yes, you have to reset this. From the main menu scroll to "Supplies Info" and hit OK. Now scroll down to "Reset belt cleaner Assembly Life" and press OK. Good luck, and thanks for using Fixya!

Xerox Phaser... | Answered on Sep 05, 2011

Hey, blue streaks could be a few different things. The first thing I would check is the image unit. Try swapping out the cyan(blue) image unit with another color, such as magenta. If the streaks change from cyan(blue) to magenta in color then you know the image unit is bad and must be replaced (part # 108R00581). If it is not the image unit then it most likely is the developer. The developer takes about 40 minutes to install and really should be done by a service technician.
Here is a video that shows you how to remove the image unit and where you can purchase one.. Just go to 57 seconds in the video. Hope this helps, good luck!

Xerox Phaser... | Answered on May 27, 2011

on the underside of the belt is a patch mirror clean it , replace the cleaner

Xerox Phaser... | Answered on Jan 18, 2011

I am assuming you mean the accumulator/transfer belt assembly.
You want to open the front cover and lower the drum latch bar, as if you were replacing a drum.
On the right side of the machine toward the top you will see a small door, about 4 inches by 14 inches. Open that door, slide the unit about 6 inches until it stops. The on the left side of the unit there is a little metal latch that you lift up to release the unit so it will slide out of the machine. Once you get it about half way out there is a handle to grab onto and remove the belt assembly. If you happen to have a finisher on the printer, you will have to remove it before you can take the assembly out.

Xerox Phaser... | Answered on Mar 25, 2010

Put the old image unit back in, if it prints normaly then you might have bought a defective image unit.

Xerox Phaser... | Answered on Dec 02, 2009

turn macine off wait 5 min repower and run recheck

Xerox Phaser... | Answered on Jul 21, 2009

you need a snippet {software patch installed}call .xerox support

Xerox Phaser... | Answered on Jul 20, 2009

your printer needs new developer and housing in what ever color is effected call service.

Xerox Phaser... | Answered on Jul 20, 2009

Staples, Office Depot, Best Buy

Xerox Phaser... | Answered on May 21, 2009

Cutting off at the bottom? It is likely it is detecting the incorrect size paper. There is usually a number of levers against the paper tray - try removing the tray and verifying the paper is in there correctly - the guides are up against the page, and if you are using a4 or letter or whatever, make sure the program is set the same, as is the printer in its menus. Print a menu page, it should show you.
See if that helps.

Xerox Phaser... | Answered on Apr 26, 2009

Try this link:


Xerox Phaser... | Answered on Feb 08, 2020

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