We recently purchased a 6022 and every once in a while the printer will fail to print a document and instead will print a black page. I have searched troubleshooting, support, and this forum and not seen any reference to this problem or a solution.
I think that the documents being printed that turn out this way are PDF's.
I am running OS X El Capitan with the latest driver (Dec '15).
If you have any ideas how to address this issue I would appreciate the assistance.