elekTRONarcade
Active member
The noise...THE PAAAAIIIINN!!! (Another MCR Hum thread)
EDIT Neeeeeeevermiiiind. Fixed it. I forgot the filter board was there and has caps. Replaced the caps and its working better.
Thanks to me, myself and I for all the help!
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So, the quick and dirty: Popped in a Spy Hunter-style suitcase power chassis in my Koz Krooz'r, wired it up along with an ArcadeShop linear PS board and a Happ switching PS. As soon as I turned it on, there's a HORRIBLY loud hum from the speakers. Volume control pot on the service panel doesn't work or help. I figured it was the ArcadeShop board, which I heard had major issues when it came to noise interference. So I completely removed the AS linear board and the switching PS, and wired up my original Midway linear PS.
Same thing, no change. Still has the horrible hum, and the game is LOUD when its coined up and playing.
L--O--U--D, I say. You have no idea lol. Even with the PCB removed, the hum is still the same.
It appears to be an overvoltage issue from the suitcase, as the lamps are now burning really bright on the coin door, and I've had one of the slo-blows fuses pop (the fourth fuse over from the left) when left on too long. Any ideas if this is indeed the culprit, and what I can do to fix it? I've already ruled out both the ArcadeShop and Midway linear PSs, the switching PS and the game PCB.
EDIT Neeeeeeevermiiiind. Fixed it. I forgot the filter board was there and has caps. Replaced the caps and its working better.
Thanks to me, myself and I for all the help!
-------------------------------------------------------------------------------------------------------------------------------------
So, the quick and dirty: Popped in a Spy Hunter-style suitcase power chassis in my Koz Krooz'r, wired it up along with an ArcadeShop linear PS board and a Happ switching PS. As soon as I turned it on, there's a HORRIBLY loud hum from the speakers. Volume control pot on the service panel doesn't work or help. I figured it was the ArcadeShop board, which I heard had major issues when it came to noise interference. So I completely removed the AS linear board and the switching PS, and wired up my original Midway linear PS.
Same thing, no change. Still has the horrible hum, and the game is LOUD when its coined up and playing.
L--O--U--D, I say. You have no idea lol. Even with the PCB removed, the hum is still the same.
It appears to be an overvoltage issue from the suitcase, as the lamps are now burning really bright on the coin door, and I've had one of the slo-blows fuses pop (the fourth fuse over from the left) when left on too long. Any ideas if this is indeed the culprit, and what I can do to fix it? I've already ruled out both the ArcadeShop and Midway linear PSs, the switching PS and the game PCB.
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