49.xx errors are mostly caused by invalid print commands, corrupt
data, or invalid operations. Basically the printer "does not understand" the print job.
- restart the printer to clear the print job from the printer's memory.
-if the error returns disconnect the network/USB cables from the unit and cycle power again.
If the error comes back without the network/USB connected perform a cold reset on the device and go the next step.
- Once the unit is at Ready reconnect the network/USB cable.
If the unit gets the 49.xx error or begins to print a job then gets the error disconnect the cables again and power cycle the printer. This time when you plug the network/USB cable in watch the control panel for any signs of the unit receiving a print job. When the printer says "Processing" press the cancel button on the printer. This should clear the "bad" print job.
I strongly recommend updating to the latest driver for the device Drivers Software
. If you had an issue with a PDF file use the Post Script (PS) driver.