I have a Roland Versa Camm SP300V, it used to work properly for 2 years, then all of a sudden I started to face this problem. I am having a cyan shade in everything I print, it also leaves a trace on the clamps. I thought that the problem was in the print-head, so I switched the data cables between the Cyan/Black head and Yellow/Magenta head, and the shades were on the magenta prints. I am totally confused about the source of the problem. Please Help.