[Misc] Strange marks on print

[9smitd9]

Hoping that someone can know this straight away.

Xerox 7855 giving strange marks on the top part of a print. I'm using a 120gsm gloss paper (get it on regular paper/card also to similar degree).

I've attached the single colour troubleshooting pages as it seems it's coming up on every drum though to different degrees

Any offers please?

Thanks

Dan
DOC_20170911202954.pdf