As some alternative, you can also print PDF-Dokuments directly from the printer.
Thinks to check before:
Step by step:
Log in
Touch "system home" in the top left corner.
Touch the button with the 9 quares in the top right corner.
Open "Print/Scan (Memory Storage Device)"
Select "Print from Storage Device"
Select the PDF and hit print.
To savely remove the USB storage device, click the little icon in the bottom line and remove the device.