I got this gaf Ansco Autoset CdS from a store for next to nothing. Shutter froze up when I got it, it stuck open 3/4 of the way. It is basically same as a Minolta Hi-Matic. They both comes with a Citizen PE shutter. Lets do it. Important reminder, you might have to do a lens collimation after this, i checked mine, it came out perfect, but it might not always be the case.
4.) I said don’t pull it off, because, under where its circled red here, there is a tiny little metal ball underneath. You have the option of unscrew that part and get the ball out first, or, lift the whole thing out and hope you don’t lose the ball. The ball gives you the click while selecting A, B or Flash. Either way, Lift this off carefully.
5.) First you need to know there’s a roller on the top of that pin circled in purple, the tiny roller does come off, you might as well take it off and put it aside.
Proceed to take the whole shutter speed ring off with the brass color plate This assembly controls the manual aperture, and, Shutter.
6.) You see the actual shutter. I am not going to tell you exactly how everything works. But, If your shutter appears to be stuck, check where I circled with purple. The red circle is actually where the shutter button triggers the chain reaction. You probably wants to use some lighter fluid, one tiny drop at a time, and move everything with your finger, also observe the chain reaction when you wind the film. Where it has 2 purple circle overlapping is critical, if that is not right the shutter won’t cock right, once again, observe. Its very easy to get lighter fluid on the shutter. If you do. Wipe it off with electrical cleaner (But i am not responsible for long term effect with electrical cleaner on the shutter blades), So, just don’t get the shutter, the aperture, and the rear lens element (in that order) oily.
Little note on the focusing ring when reassembling. Putting the final (front lens element) piece in. Twice it back on all the way in, and you put the front (focusing) ring back on, the front ring will only fit one way watch the 3 lines at the side it will give you pretty good ideas. After that, with the lens screw all the way in, set the ring to infinity, and put the set screws back on. Now, check you focus at infinity via lens collimation, if needed.