conistent lines in cyan over whole page

[ps-tech]

Check High Voltage boards first (HV1, HV2), contacts and wiring.

[tulintron]

I would think about boards. PRIPB or IMCB. I would disassemble everything and clean all the boards with electrical contact cleaner spray. This defect is in the image formation. You can invert the Cyan Lasers with Magenta, including cleaning the connector terminals of all the Lasers, but I believe it is Boards.
My opinion is based on everything you said regarding the supplies.

Good luck.

[wjurls]

Thank you for the input, ps-tech. It didn't work though. We did that, and the same cyan issue wass still there. We even swapped the entire transfer belt unit with one from another machine, same cyan streaks. So no problem with the first transfer rollers. Now we are going to check all the wiring to the cyan developing unit and to the charging corona's. We alreaddy did a visual inspection of all contacts, but now it's time to take it apart. Last resort will be checking the pcrb. I know some are going to advice to replace the pcrb, but it's an expensive fix that might not solve the issue.

Printer control board has little to do with image formation. That is the job of the image processing board and/or overall control board. PRCB is responsible for activating motors, fans, clutches and reading sensors and controlling main engine operation. I still suggest trying different interface cable. The Creo likely use the same cable as the Fiery. I've seen a similar issue on a C6000 involving yellow. It was the cable.

[Synthohol]

swap the cyan and magenta drum and DV units, put tape over the hole so it wont add the wrong color, keep the toner door open so it wont try to add any either.
see if the issue moves, if it does its likely one of those units, if not its looking like a board.

[Ziggy]

swap the cyan and magenta drum and DV units, put tape over the hole so it wont add the wrong color, keep the toner door open so it wont try to add any either.
see if the issue moves, if it does its likely one of those units, if not its looking like a board.

I told him the same thing back in March. Maybe he will listen to you