Hy, I have some nice problem, for me is hard but i believe for you is light one! 
when printing on any size of paper between 80-130 gr. uncoated weight paper I get this smudged print.
On heavyweight coated 280-300 gr. matt paper print is fine.
In meanwhile i changed new fuser heat roll, and complete fuser belt assembly. Only oiler assy is older
why is this happening?
thanks
Examples of print in attachment are printed on 120 gr. uncoated premium paper (A4 LEF) (Long Edge First)
umax22.jpgumax21.jpg

when printing on any size of paper between 80-130 gr. uncoated weight paper I get this smudged print.
On heavyweight coated 280-300 gr. matt paper print is fine.
In meanwhile i changed new fuser heat roll, and complete fuser belt assembly. Only oiler assy is older
why is this happening?
thanks
Examples of print in attachment are printed on 120 gr. uncoated premium paper (A4 LEF) (Long Edge First)
umax22.jpgumax21.jpg