Hi all, happy to have found this forum. Have a Yamasa Type A Wai 2 Pulsar with these numbers on it. Y-4-14 serial 063712. Game plays normally until it pays out, then it always overpays and sometime gives an E-3 error even though the hopper is full. I suspect a faulty coin counter. I cannot find an optical device any where on the hopper, just a switch with an arm on it where the coins come out of the hopper. The switch has the name Micro and is made by Yamatake- Honeywell. There are no wires leading to any sort of optical sensor. Unit worked fine for years, then this problem occurred. Any help or ideas greatly appreciated. Thanks.