Xerox Docucolor 12 printing invert or negative images.

[alex4alltimes]

My DC12 copier printer is printing negative or invert images. Say, if I send a black print , it comes out white or a blue print becomes orange. I have changed the VSEL board but to no avail. The Power Supply Board gives out proper voltages. Please help. Could it be the ROS unit? Please help!

[xcopytech]

what about print from diagnostic mode?

[kandod]

Could it be that you have put the cables from the Fiery at the wrong places (swapped them at one side only)?