WC7775 problem with cyan color

Hi,

Just having problem with cyan color in my Xerox WC7775.
This is the first time I have this problem.
Pls help.

attached a scan from 100% cyan print, other color is ok

Regards,

 

Swap the colour drum module and see what you get

 

I think it is a developing problem not a drum. But yeah - swap the drums. What is the print count? Can you get a DV unit and try to turn it by hand?

 

I'm newbie in printing, sorry.
What is DV unit and how can I find it in my Xerox?

 

Solved.

The technician from Xerox came and found that a small plastic unit is broken so that a metal stick fallen into cyan drum.

The technician said this is not the first time he got this problem. Stupid problem
Now, I have to wait for Xerox Polska ordering a new replacement part (I'm live in Poland). Until then the metal stick is held by tape