My Superman hums fairly loudly during attract mode. It seems quiet during game play but whenever the high scores show it hums heavily. Is this a "normal" Superman thing or something I need to fix? I've never been around another SM machine to listen. Thanks in advance!
Ok, it must be a SM thing. I have tried different speakers and it's the same "hum" when the machine is in attract mode...it gets louder when the high scores show. Thanks for the intel!
Atari games buzzed when they were new too. The more lighting or more digits lit on the LED displays, the more noticeable the buzz was. It was obviously not a concern in a noisy arcade back in the day. Just something you noticed and lived with.
Not looking at a schematic but if both the LED displays, and the sound circuits are run off the 5 volt logic, it is possible that a fresh filter cap for the unregulated 5v input may help reduce it.
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Forsyth, MT
