... COIN signal4. Red line - - - - - - - - - - joint DC + 12 vTroubleshooting:1. The power cord is bad contact, coin, the coin machine lamp, whether the ... Press set key 3 seconds, indicator light is bright.Constant input 30 pieces of different COINS, lights, set finish.Pay ... should be clean in the contact situation, and disconnect all power supply circuit, must be completed by adults3) the product clean ...