Have any of you successfully repaired an early FM with a jammed shutter? It appears to be locked up deep inside it somewhere.
The mirror moves freely on this one.
The mirror moves freely on this one.
if the mirror moves then the problem usually can be fixed by opening the bottom cover.
Did you to try to remove the brass plate with three screws and the lever connected to the rewind shaft? There's also chance that the small locking lever on the rewind shaft is not returning as it should :
Additionally, try to release the shutter by pressing the pin from the bottom.
Then you can try to open the top cover and trip the shutter directly by pressing the brass pin under the shutter button. If it works that means there's problem with shutter button assembly.
I had an FE that did this from time to time. It was always possible to free it without dismantling, but I’m sorry to say I can’t remember how! I presume you have tried turning the sprocket roller? All the shutter speeds? And running the self-timer?
The problem is that the original FM is completely different internally from any other SLR that I have seen, concentrating nearly all of its mechanisms in a unique design beneath its shutter speed selector.
The rest of the Nikons are designed to be unjammed from underneath, where it is not possible with this original model.
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