Working on a WC6515 and it has light prints. there is a solid image on the primary transfer belt. secondary transfer roller not not pulling image from the primary belt. I have replaced the secondary transfer roller per the service manual but this changed nothing. Since the Secondary transfer roller neutralizes the charge to ground I am not sure what to do. Does anyone have any ideas?? I check plug voltage and the natural to ground was bouncing around ranging from .5V to 2.7V does anyone think this would cause any issues??