Bizhub C250 black edge on top of paper

[HasseM]

Can someone tell me what can be causing the top side of all prints to have a black line?

see:
Sc25020102212111.jpg
It seems to be getting worse over time. Probably I either need to clean something or adjust something....

Thanks you very much for taking the time to help me.

[copyman]

Can someone tell me what can be causing the top side of all prints to have a black line?

see:
Sc25020102212111.jpg
It seems to be getting worse over time. Probably I either need to clean something or adjust something....

Thanks you very much for taking the time to help me.

Looks like transfer belt or black image unit.

If you run paper the other direction line should not show since it's on the edge.

[HasseM]

Looks like transfer belt or black image unit.

If you run paper the other direction line should not show since it's on the edge.

Transfer belt and imaging unit have been replaced not too many prints ago. So, is that a matter of replacing or cleaning?

How to "run paper the other direction" ?

[Toxic]

It does not matter when parts are replaced, it could be damaged.
Is it same on copy and print jobs?
Did you visually check drum and belt surface?

[HasseM]

It does not matter when parts are replaced, it could be damaged.
Is it same on copy and print jobs?
Did you visually check drum and belt surface?

I'm not expecting it to to be damaged because it's only used in a very regular way (printing A4 and scanning A4 with only plain 80g paper). It's both on printing and copying. Haven't checked anything so far because I didnt know what to check. I was more or less expecting it to be some calibration thing....

[Synthohol]

looks like the paper in the tray has been pushed back from slamming.
same from all trays?