We have a customer that called us with completely blank pages that started all of a sudden the other morning, the day after our tech had worked on the machine for a jamming problem. The machine was printing and copying just fine when he left, and worked for that afternoon. Pages are now blank when copying and printing. He had serviced the one way bearings in the feed section and the PF tires and also cleaned the DV unit, transfer assembly and charge assembly. On his return for this problem he went over every item he had serviced but can't find a reason for the blank pages. There is no image on the drum when stopping the machine half way through the cycle. The drum is turning (he could see that) and the DV unit is also turning and he gets some toner on him when touching the surface of the mag roller. Any ideas or anybody have this before? Thanks!