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Author Message   Riccardo Tinkerer Username: Riccardo Post Number: 2 Registered: 12-2007 Rating: N/A Votes: 0 Posted on Friday, December 28, 2007 - 03:51 pm:    If you have the older type of back which have a 120/220 switch; they are a sophisticated piece of mechanics. I unjammed my with a long work which included a complete opening, I hope you don't need to go that far. Little flat springs are hidden behind the panel... Have you tried turning the gear that protudes on the side? A check for a more "serious" jam is if if the frame counter starts showing the numbers not aligned, but "half clicks" in the frame window.