HP Color LaserJet 8500 Service Manual - Page 435

Paper path troubleshooting General paper path checklist
Verify the green lever on the fuser is down.
Check that the post charger cleaner is pushed all the way to the right. Media jams could occur when it is out of place.
Clean the printer. Toner and paper dust in the paper path inhibit free movement of media through the printer and block the sensors.
Vary the input and output selections of the printer to determine if the problem is associated with a particular area of the printer.
Worn separation rollers on the input tray cause last-page multi- feeds. Check the condition of the pick-up rollers and separation rollers when troubleshooting multi-feeds. Bent separation tabs cause misfeeds and multi-feeds. Replace the tray if necessary.
Defective input tray switches can cause media jams by indicating the wrong size media to the formatter board.
Scraps of paper left in the paper path can cause intermittent media jams. Always check that the paper path is clear when cleaning the printer and when clearing media jams. Also, remove the fuser and carefully check it for jammed media.
Reduce curl of black-only transparencies by: • placing the transparencies in a presentation sleeve • printing to the left (face-up) output bin
Verify that the media requirements are met (see page 29). Wrinkled pages
Verify the green fuser lever is down.
Verify the media size and type are set correctly in the printer driver and the printer control panel.
Verify the media meets the specifications listed in the HP LaserJet Printer Family Paper Specification Guide. EN Paper path troubleshooting 433