Just a hint should you clean DU2 Switch on one of the 8000 or even 5500 series. Once at it, just make a hole behind the DU2 switch so it can be hit with air-duster. It saves you time on next visit if Jam 0509 or 4418 appears and if ain't working, the Switch or flag is bad.
DU2 Switch 8000MF inside.jpgDU2 Switch 8000MF outsdide.jpg
DU2 Switch 8000MF inside.jpgDU2 Switch 8000MF outsdide.jpg