Where is that "vend switch" actually located?
I see that it is part of the coin mech, but something would have to "add" the coins together to get the proper purchase price right?
Or is that a service "vend" switch only if the door is open?
(I'm just curious, don't know much about these)
And also:
Since that particular switch is utilizing both the NO and NC, I would assume that if you jumpered pins 1 --> 3 then pin 7 would have to be removed. They shouldn't both try to work at the same time.
I know I've read about some of these vending machines that you should be able to get into a "service mode" with some sort of button sequence code or something.
Then change the pricing, etc. Not sure if this applys to yours though.