HP Deskjet 3520 Inkjet Printer - Manual (Page 40)

paper jam
Follow each of these steps until the paper jam is cleared.
1. Remove the paper from the paper tray.
2. If you are printing labels, verify that a label did not become detached from the
label sheet while passing through the printer.
3. Remove the Rear Access Door. Press the handle to the right, then pull out the
door.
4. Remove the paper jam from the back of the printer, then replace the Rear
Access Door.
5. Reload paper in the paper tray.
6. Reprint the document.