I have a Minolta cs pro 2080 copier. It is making good copies althought there is a lot of black shading on the page.
3 possible causes:
1) The optics are dirty thus making your copy darker. The test for this is to manually lighten the copy using the exposure control on the panel of your copier. Lighten the copy several positions and see if the copy gets better. If it does then the optics need to be cleaned.
2) The copier is overtoned. This means that the toner to developer concentration is to high. This will require a trained technician to lower the toner ratio and then recalibrate the toner/developer ration using the F8 mode.
3) If the shading gets much worse as you run say 10 copies in a row then the drum cleaning blade would be the cause. So run 10 copies of something and compare the first copy out with the tenth copy out. Do you see a dramatic difference in the amount of background or "shading"?
Good Luck and thank you for using Fixya.
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