Need Help Question roland xc-540 the yellow and black not showing after printer head replacement.

You've got something completely out of whack. Did you disconnect all of the ribbon cables when you changed one print head (dangerous)? -perhaps they are mixed up. Why are there no letters, A-B-C for the three print head groups? I have an (old) XC-540 (but they should all be pretty much the same) and it prints (left to right, standing in front of the machine) A: cyan, magenta B: yellow, black C: light magenta, light cyan Have you tried rebooting the machine by turning off the main power?

 

Did you get this resolved?
Is the black printing on top of the other colors?
(info @ progspec.com [no spaces])