Step Nine: Arcade Coin Slot Repair
First, if you take a coin and place it in the slot—Does it fall all the way through and not register credits? Or does it get stuck and doesn’t fall through?
Sometimes it is unsightly and you might like to fix this as a cosmetic feature. Unlike a computer, your pachislo slot machine does not have a built-in cooling fan. Sealing cabinet holes will cause your machine to overheat and is a fire hazard. Caution: Keep this machine and all electric/electronic equipment away from water. Stripped, or stuck, screws can quickly derail your projects! When removing a stuck screw, remain patient. When one method doesn't work, don't give up! Take a deep breath, gather a new set of tools, and try an alternative method.
A. If it falls through but doesn’t register a credit, then proceed to follow the steps below.
First, open the coin door. With the coin door open and the game still ON locate the two left and right switches at the bottom of the coin slot. With your eyes look at the wires coming from the coin switch. Make sure both are connected and soldered on. Not taped or glued etc, as some “home owners” have done which will certainly make it lose connectivity over time. If found, solder the wires back in place. One to Normally Open the other to Neutral.
Third, If your finger can’t register a credit manually, then replace the switch itself with a new coin slot switch and solder the wires from the old one onto the new switch. The switch has two screws holding it in place. Unscrew these and the switch simply can be removed. Un solder the wires but make a note of the orientation before you disconnect them. Once your new switch arrives then solder the wires on and screw it back into the coin slot
B. If your coin gets stuck and doesn’t fall through. Open the coin door and watch the path the quarter takes.
Chances are if you watch where the quarter is getting stuck you will find that a paper clip, paper, junk, or Canadian quarter is blocking the path. Simply un block the path of the quarter. You may want to open the coin acceptor like so in order to further remove anything in its path. You may just want to replace the coin acceptor at this time with a new one.