CS650 and color change issue

[Techead42]

We've been struggling with a CS650 color change issue...customer runs a print job with gray background & background progressively fills with magenta till the original color is no longer recognizable. Internal test prints look fine (#53, each color, about 40%). Any thoughts?

[knightfall]

do you have the latest firmware installed? 3 color gray are usually the hardest to maintain consistent you may want to see if the customer is willing to use black to make gray instead of 3 colors.

[Setright]

[random]

Have you set the gray balance using the manual gamma offset adjustment in the quality part of the service menu?

This is pretty critical and often overlooked so I suggest you go thru this procedure with a fine tooth comb. Unlike the c500 the offset adjustments do have an effect on printing.