I recently inherited a Canon AT1 in great-looking condition with what appears to be the kit lens. After making a silver-oxide replacement battery out of button cells and shrink tubing, it seems to work, and the metering is spot on, but about 10 percent of the time the shutter doesn't seem to work right, resulting in some pretty neat looking photographs with scorched edges, or mostly, the right-third of the photo being a bit over exposed, sometimes also featuring beautiful red auroralike ribbons all over the place.
Since I also vaguely remember experiencing weird shutter lag when these photos were taken, I assume it's the shutter. The mirror cushion foam has all deteriorated and gets on the mirror sometimes, so it's possible that it has gotten in something and gummed it up. The shutter works when it works though, even up to 1000. So I would really like to get it working.
Do you know where I could find exploded diagrams? Is there any chance that I could fix this myself? I'm pretty handy with other stuff but never tackled a camera.