Bottles won't release

I have a Cavalier CS-80 mahine that all of a sudden won't vend.  It accepts the quarter, but it then doesn't "click" to allow you to pull the bottle out.  I know very little about how this works.  Where is the vending motor and does this sound like a coin acceptor problem or a problem with the vending motor?  I have had this machine for 14 years and never had this problem.  Thanks for any help you can give me.

[MoonDawg]

You have a gravity fed, slant shelf bottle machine, so you don't need a vend motor.
         The click you used to hear was a solonoid (magnet) that energized to allow release of one bottle, once the coin requirements were met.
         Yes, the problem is with the coin acceptor, and replacement is usually the easiest fix.                  Glen

Thanks for the info.  Do I replace the whole coin mechanism or what and where can I get one of those.  Thanks.