Question about Xerox Phaser 7750DN Laser Printer

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Xerox Phaser 7750 - Tray 1 streaks on prints

I have a Xerox Phaser 7750 that is printing fine except through Tray 1/bypass. When printing heavy stock there are blue toner streaks (about 1/4" wide) across the center portion of the paper. I checked the blue drum and it looks OK. Paper through Tray 2 is OK. Tray 3 paper runs through in the same direction as Tray 1, and it's clear. I've tried different media settings and Tray 1 is the issue. Problem comes and goes, so I can get 10 clear prints, then dirty. I've cleaned rollers - not resolving. Any suggestions?

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  • 11 Answers

If you put Tray 2 in Tray 1's spot with the heavy stock in Tray 1 (now in tray 2's spot) and print from it, does the problem persist?

This may help...
http://www.support.xerox.com/support/phaser-7500/support/enus.html?objGUID=4538

Posted on May 17, 2017

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Posted on Jan 02, 2017

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SOURCE: Xerox phaser 7760 streaking

to fined out what the problem could be you need to open a word doc and sent a blank page to the printer. from this it will show where the problem is in the printer
if u still get streaking it couls be a faulty toner and it may not be the cyan toner either. i would give the fuser unit in the printer a check. if there marks on tthis unit i can cause this problem as well

Posted on Nov 23, 2007

  • 2072 Answers

SOURCE: Xerox 7750

In what direction is the mark? Is the defect a dent in the paper,that repeats or is it a crease in the direction of the paper feed? If it is a dent that is repeating, the cause would be the transfix roller. If it is in the direction of paper feed, there may not be much you can do, most of those ceases you can see when held sideways like that come from the rollers edges. Just the normal crease that can be created by the end of the roller.
You can open the covers on the machine and make sure there is no excessive buildup of ink on any of the rollers. It is possible there is to much pressure on one of them, but with certain types of paper, there may not be much you can do. I will research it more and get back with you on that issue.
One thing you can try, (because your marks can be comming from a defective fuser), set the machine to print 4 or 5 pages, then shut it off or unplug the printer in mid run. Carefully look at the jammed pages to and see where in the process the crease is comming from. Take note and let me know please.
The gray haze seems to also indicate a possible fuser issue, but moreso, it sounds like the black housing is over toned. Most likely cause of that is a bad housing or bad developer. The developer in that machine will become worn and need replacing. It will restore the contrast and should resolve background issues.

Posted on Mar 11, 2008

  • 2072 Answers

SOURCE: Xerox Phaser 6250DP sensor not cleaning

Is there a specific code coming up? That can make it easier to pinpoint the exact problem.

Posted on Apr 21, 2008

yalmer
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SOURCE: Xerox phaser 7750 error code

Click on this link at xerox.

Posted on Apr 22, 2008

  • 110 Answers

SOURCE: hi i got xerox phaser 7750 and i have error code

Cheap fix : reset the Developer Life Count in the Service
Tools menu. Hold down the back ARROW key with the "i" them with your other hand turn on the machine.


Expensive fix : What has happen is that the developers have come to the end of the life and once it gets to a certain page count it will print out no more until you have replace the developers. One thing xerox forgot to do is reset the engine control board too for this machine. So you might need a new engine cotrol board too.
Procedure

1. Replace the Developer
2. After the Developer has been replaced, reset the Developer Life Count in the Service
Tools menu.
NOTE: It is recommended that all the Developers and Beads be replaced at one time rather
than on sccessive visits.

Good luck.




Posted on Oct 29, 2009

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Solution: Remove Print Smears / Printing Fuser Cleaning Pages
7750 Support Knowledge Base Remove Print Smears Fuser Cleaning...

With Troublshooting highlighted on the printer display perform the following steps:
  1. Press OK.
  2. Press the Down Arrow and scroll to Print Quality Problems.
  3. Press OK.
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