Printing on LJ 5200 puts out grey and poor print. When i stop the print in mid job(opening cartride doors) the toner is on the optic drum of the toner and its not a weak print. Seems it something wrong with the transfer procedure. I ordered the transfer roller, any more ideas what it could be?

Do lj5200 have problem with the high voltage lines so maybe toner isn't attracted enough to paper with the transfer roller?