I have an old Nikon S rangefinder and the shutter sticks sometimes. Also, There aren't two images in the viewfinder when you are focusing and nothing seems to change when you turn the focus dial. I am not very familiar with this camera and haven't even shot a roll of film through it yet. Any suggestions? Thanks!
This camera is pretty easy to work on. The entire rangefinder is wide open under the top chrome cover, easy to check out. You can reach the shutter curtains just by removing the frame around the film opening in the back. I have a few sketches, though not a complete set... email if you'd like them.