Xerox Versalink C505 bad printing in color mdoe

[pc_okay]

Hello friends,

I have a problem with this printer Xerox Versalink C505 , printing perfectly in B&W but bad in color.

There is a little yellow ghost printing around color print.
So little text in color is unreadable.

I already change drum cyan & yellow with no success.
I try (i think) all avalable calibration in printer menu..
(black drum is dead but it's not the problem i think)

I'm not a printer specialist,if anyone has an idea?

Thanks !