Just in case there are any people out there who still use Hasselblad EL models... I just acquired a 553 ELX to use exclusively for studio portrait work. Everything on it works well, except for the shutter release. Unlike the OP, I can sometimes get the shutter to release by pushing the shutter release button, but only about every other time I press it (actually pretty consistently the first press doesn't fire the shutter, but the second consecutive one does). I made this video to illustrate what's happening:
In trying to troubleshoot this, I took off the film back and the lens and can watch what happens when I depress the shutter release. The little flat head of the release lever (number 26 in the diagram from the service manual, page 18) pokes out of the back of the body but the shutter doesn't fire. However, if i nudge the little poked-out head of the release lever with my finger (pressing lightly down on it) the shutter will then fire as expected! If I put it in 'A' mode and try this without the back on, I can pull out gently on the release lever head, and the shutter fires every 1 second or so, as expected in A mode.
Also, further info: I also tried the second release button hole and experienced the same problem, and took it to a camera repair shop and they tried another button, so it's not just the release button hole.
Does anyone out there know how I could go about fixing this without having someone (or myself) tear down the camera to adjust the release lever?
Shot in the dark, and I hope no one minds me resurrecting this thread from the depths.
Thank you in advance internet.