How can I remove the Fuser from a Dell P1500 Laser Printer?

How can I remove the Fuser from a Dell P1500 Laser Printer?

The test page has four smudge lines (about half an inch width) across the printed page. it seems a roller where the page passes through either has excessive toner (dirty) or the Toner cartridge itself is defective. I need to remove the fuser to see if the toner residue resides there.