Have you worked on cameras before? If not, do your camera a favor and do NOT touch it until you have some experience with repairing cameras. I suggest buying a Petri 7S on eBay (they're worthless), and practice disassembling and reassembling portions it until you're comfortable with tiny screws and parts. I have serviced many classic cameras, and when I see marred screwheads, scratches near screwheads, and internal damage, I say "an idiot has tampered with this one." Then I have to fix the damage, as well as whatever was wrong to start with. Don't learn on that beautiful Lord!
Mark Overton