I recently bought a Konika Auto S2 and was using it to take some photos of a trip I went on but it started to jam and I can't get it unstuck, the shutter is manual so there's no problem w/battery, what should I do?
Probably the blades are gummed up. This may happen even if there is no visible grease on the blades. See the articles on the (virtually identical) Konica Auto-S1.6 and 'Canonet blade cleaning' in the article section.
On the Auto-S2 and some other cameras the shutter has to cycle correctly, otherwise the advance lever will be blocked. Don't try to move it until the shutter has worked properly.