HP 3500 - Manual (Page 171)

4. If the paper is visible, remove it.
5. If the paper is not visible, check inside the printer in the top of the tray opening. Remove
any paper.
6. Replace Tray 2 and optional Tray 3.
Note Use Tray 1 and the lower rear door (rear output bin) when printing on heavier paper. See
Printing on special media for more information.
7. Press to resume printing.
ENWW Clearing paper jams 159