kyocera mita 1620

[CHAITANYA]

hai! every body
i am facing the problem with kyocera mita 1620 black strip on back of the paper.
i have clean d.p unit, drum unit, wastebox, every thing but no use
what to do any clue?

[bariskurt23]

clean transfer roller

[anhks1910]

hai! every body
i am facing the problem with kyocera mita 1620 black strip on back of the paper.
i have clean d.p unit, drum unit, wastebox, every thing but no use
what to do any clue?

Notice: wrong toner