Mirror sticking on old Ricoh SLR. Is there a fix?

Hey folks. I must first confess I'm new to photography, outside of point and shoots that is. I've used this old Ricoh in the past, and though I recently bought a dSLR, I'm curious if the Ricoh is fixable. When you click the shutter button, the mirror goes up, but sticks in the upright position, usually for a few seconds. I've found one similar topic online, but I'm wondering if anybody here has experience with this so I can get some first hand info. I don't even know if I can still find film easily these days, but if it's possible to fix it and get some film, I'd like to try my hand at that again as well. Thanks! If you need more info, just ask.