2nd follow up:
I just found out that workcentre 6015 can be started in diagnostic mode, See: https://www.support.xerox.com/en-us/article/en/1554710
From the main menu one can enter a menu that plots test pages. A test page that displays a grid in black, cyan, yellow and magenta was printed without a problem. This shows that the hardware of the machine is capable of printing.
I also dit a [All test] (result ok) and did a reset to factory settings with a menu called [Clear All NVM]. However after restarting the machine I still get the CRUM ID error (despite all toners being original)
Machines are sold as open from Xerox.
The first supply you put into them encodes the status/contract/region of the device.
So you have regions, which are NA/DMO and Asia pacific
And you have contracts, which are Metered (On a contract with Xerox) and Sold (purchased retail)
So you bought from somewhere, used up the original supplies and threw in a 3rd party cartridge, the machine locked itself to the region and contract programmed to that item. And until you can find out what that was, you are pretty much out of luck, it could get costly. Xerox can convert the machine back to open status, but they won't do it for free, and in the case of using a 3rd party, it would likely just get your warranty voided at the same time.
Our cyan cartridge is empty. It is part of a set of 4 cartridges that are non-Xerox but they worked fine. We ordered a replacement set of 4 Xerox cartridges. Replacing the Cyan cartdrigde gives us a 093-962, which is really surprising since it is genuine Xerox. After trying the other 3 replacements (yellow, magenta, black) they all produce the non-xerox error. Also tried it from starting the printer empty without cartridges. It seems highly unlikely to me that in a batch of 4 cartridges all 4 are4 defective. Putting the old cartridges back in gives no error, these are accepted but then we are stuck with our empty cyan cartridge...
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