WC 7545 - I am getting white lines in full black prints (or partial). It is obviously where toner is not adhering. I have troubleshot it and it is only in black, not the colors so it has something to do with black hardware/rollers. I have exchanged/replaced IU's, and still does it. I had this issue in the past and a certain roller was replaced for black but I cannot remember what it was.
Does anyone know what roller that may be? It is specific to the black only.
Thanks in advance