We have a Xerox DC250 that has been printing very nicely. We had a tech come and replace the Cyan dev unit (dispenser or ROS maybe) and can't get the cyan to print at all.
He put the old dev unit in and still not printing cyan.
Changed the toner to a new Xerox toner cartridge.
Replaced the drum cartridge with a new one.
When printing the calibration chart the cyan prints. A standard print or copy of cyan produces a near blank sheet with a very very light smear of cyan that is barely visible.
Tested to see if the dev unit is working and is definately rotating and there is enough developer in the dev unit (or dispenser or ROS some may call it).
Have replaced the motor and now out of options.
Anyone have any idea on what it could be please?
So the internal pages print correctly but not from computer? How about scanning? Are you trying to print from Acrobat or other such software? If yes, what happens if you disable "Print as Image" from the software's Print settings?
Yes, we can print the internal pages, cyan prints as normal ... calibration charts, etc.
No, we can't print Cyan from copying or printing - either from the glass or over the network.
Printing the largest sheet size only has the Cyan printing only around the side edges.
Im assuming that you lost cyan right after they replaced the cyan developer housing. If that is the case check that the ground clip on the back of the developer housing isnt bent. Most likely the bias spring housing in the back of the machine that makes contact with the developer housing clip was damaged and is not making a good contact.
The connection at the back of the machine looks to be pretty good.
We have taken out the drum / developer tray and switched it with the tray from another machine and still have the same issue. All colours are printing except cyan.