asked Apr 7, 2018 at 1:03pm
Konicaminolta Konica-Minolta Bizhub C253

No black copy

hi the copy is ok with all color except black . No black toner come out on paper i changed unit image same problem i changed the entire PWB CARD the same prob then i changed charge card also same problem i interchange the polygone motor (black with yellow ) again yellow ok black copy blank what to do next plz