Question about Xerox Phaser 7750DN Laser Printer
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
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Posted on Jan 02, 2017
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