only Rear side of 2035 s dirty

[akbareshghi]

my rear side of Copies is dirty but the Up side of it have good quality
what cause(s) have created this problem
my quesses is follwing:
the blade of Transfer Belt cannot clean well the Transfer belt
the Hot roller of fuser must be replaced
the cleaning of fuser have become dirty
etc
but this problem have disappeared when the Hopper of toner supply is removed from machine

thank you

[Serial Swop]

2035

Yes a good idea would be to check the tranfer section, what is weird is the removal of the hopper unit, but you might want to replace the dev filter on dev tank, this causes contamination through the m\c and builds up on the transfer even after the blade has cleaned the belt.

[teebee1234]

The mag roll being filmed over will cause this. It's not always consistently dirty across the entire copy when this happens. Remove the developer powder, scrub the mag roll clean and replace with fresh developer.

[akbareshghi]

with what i must scrub mag roller of Dev unit ? which are the best your suggestion for doing this action ?