Hi. I wanted to know what the difference is between a coin comparitor, door, and mechanism and which ones I need to make my machine's coin slot functional. The second thing I wanted to know concerning the coin door is how I can replace the coin return buttons. I want to replace them with different colors which I would also like to know where I can find. Thanks a lot.
A "coin comparitor" is an electronic coin mech that electronically compares a sample coin (in a holder) to all coins passing by it's sensors. Coins matching the properties of the sample are allowed through and a credit signal issued to the game or vending controller board. Coins inserted that do not match the sample are immediately rejected and sent to the coin return hole. Coin Comparitors require power to operate (usually 12 volts DC, but requirements vary from manufacturer to manufacturer and/or model to model). When no power is applied to the comparitor all inserted coins are rejected. Comparitors are manufactured in two styles: one style is the familiar 3.5" by 5" found in most game doors. The other style is called "roll down" and is similar to what you see on a Donkey Kong (Nintendo) cabinet. Coin Controls, Coinco, National Rejectors, Coin Mech, Mars, Lucky Sunshine, and Asahi Seiko all make coin comparitors. By the way, coin comparitors are much more secure than mechanical coin mechanisms which is why many casinos use them on slot machines. Mechanical coin mechanisms must be kept level to operate correctly, but coin comparitors don't generally need to be level to work.
A "coin door" is the door, frame, reject buttons, coin entry, and coin mechanisms & switches all mounted to an access door installed on a cabinet. Not all coin mechanisms or parts are interchangeable between coin door manufacturers. Coin return buttons are generally NOT interchangeable between different manufacturers.
A "coin mechanism" is the mechanical or electronic unit that sorts/accepts/rejects coins. These may be of the usual 3.5" by 5" game variety that are held to the door by a frame or bracket or the "roll down" variety that bolt directly to a door or wood cutout. Us older industry guys like me refer to coin mechanisms as "coin chutes" and the terms are interchangeable. Mechanical coin mechs generally only accept one denomination and they must be kept level in order to function properly. As they get used they build up dirt/gunk inside them and require cleaning and/or adjustment. In Japan, a coin mechanism is called a "coin selector".