Hello Unreal80,
Does it happen on just one file or application? I did find this solution that may help you isolate the image quality problem.
The printer is 1 year old with only 220 prints. I have this problem since i ordered the xerox but i be noticed it now more, because have bigger surfaces with one color to print. On normal colored pictures this problem is not there. To show the problem i have print 2 big gray surfaces in portrait and landscape format. the further to the edge, the better the quality. Any ideas? regards