I am working with (2) Konica Minolta Copier / printers, both model 554e. Last year they printed fine. Now they are dropping any print job sent to it.
Looking in the log on that unit, the Error is "Dropped" & "Authentication Failed"
We upgraded OS's on our workstations to Mac OS X 10.11x. The old print drivers were removed, and the new print drivers are installed. I have tried setting them up with the identical procedure used last year, with authentication codes for each user.
There is also an error on the OS side: "The Optical Photoconductor Needs to be Replaced" sometimes comes up, other times I get "The paper tray is almost empty". The job seems to complete, and it never shows up at the printer. The KM Log always reveals Authentication failed.
The printer is setup using it's IP Address. Other things I have tried is setting up the printer with LPP, IPP, Jet Direct Socket.
Does anyone have any ideas on this?