Originally Posted by
ridgemill
Is it an even background?
When replacing the PCU did you re-attach the rear plate? If this is missing it can cause a background to appear.
Also, make sure you enter the coefficient of the new drum in SP2-005-237.
It is easy to miss these two, even after fitting these drums a hundred times.
If the problem persists between different drum units, perhaps a shading error?
Make sure the white reference, optics, and laser are cleaned. Perform a memory clear on Printer Application, to reset the ACC, then re-perform the ACC and do a test print. If that looks good, do the same with the Copier Application, but make sure you take note of their Copier settings first.
If you get a chance, either print off the Printer SP colour test pattern, or get the customer to, and post it here.
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