hi Guys Im Siva Im using KM c451, recently i have chg transfer unit motor due to worn of,after i chg the motor, my machine start to give problems , initially there was no print at all,after i dissemble all the screws and assemble back the screws, the problem solved i guess maybe due to grounding or loose contacts problem, but i have new problem, when ever i print fonts about 6pt, it have double image or ghost image, and the problems only with c,m and y. K no issue at all,pls help, is it still loose contact or grounding PS. IU for c,m and y are new