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Author Message   Arfd Tinkerer Username: Arfd Post Number: 7 Registered: 01-2013 Rating: N/A Votes: 0 Posted on Sunday, January 27, 2013 - 05:32 pm:    I had a couple F-1N with this problem. In both cases the wind jam was caused by the first curtain brake getting mis-aligned. It is simple to put right but requires a lot of disassembly. The problem you describe could also be a simple electrical problem. Take the battery out and examine the bottom contact, it should spring up, then press the shutter release. If that doesn't work take off the base plate and look at the release solenoid at the rewind end. Using a small screw driver very gently release the armature. If already wound the shutter will release, if not it is very likely the shutter isn't wound and the problem is a wind fault either due to the brake or something stuck in the shutter gears.