SA3 printing from bypass: white marks like scratches workcentre 7655

[kostaslia]

Problem while printing super A3 from bypass (double sided) : White marks like scratches always from the left side.
photo with the marks 

[gabiene]

Hi,

It could be from the 2nd BTR.

Gabi

[kostaslia]

2 BTR are the rollers before the fuser? I must replace them or is there another way to solve the problem?

Thank you for your reply

[gabiene]

Yes, that one.You must replace it.