Xerox 242 printing blank get grey stripes

[Joana]

Hello,

printing with xerox 242 and suddenly I am getting grey/light black stripes across printing paper (even printing blank). It gets darker at the end of the print and repeats across paper. It is visible only on heavyweight 2 and 3 paper. On plain paper is not visible. It erases with the eraser, feels like dirty paper stripes.

What should I clean or check?

Tried to make photo or copy. Attached a picture of printing blank paper to see, but which is not very visible.

Hope for the help. Thank you!

[Joana]

I've measured - dirty stripe repeats every 9 cm

[Sn0wlink]

I don't work on this model, but it sounds like a drum issue.
Is it possible to swap the drums around to see if the colour of the line changes?

[njshenking]

2nd transfer roller

[Joana]

it was 2nd BTR roller , changed to new and it fixed