hi everyone bizhub 750 singel side copy is clear when i make 2-2 side give very have back ground i replace all part drum developer cleaing blade toner but still same 2nd side back ground whats wrong this plz give me a solution thank's
It sounds like your 2nd side bias control voltage is out, please check and compare to factory values as per manual or print out.
I have the same problem. Will replace developer tomorrow...
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Yes, it was developer issue. Just replace the developer.