Jokerz!
Williams, 1988You're currently viewing posts by Pinsider stoptap.
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When I had my Jokerz it developed an EXTREMELY loud hum. I tried all the usual fixes (including the above service note).
Nothing worked.
I think it was Korn from the RGP Pinball days that eventually told me to check the DC supply to the sound board. Sure enough there was a lot of AC ripple present. I replaced the bridge rectifiers that supply the DC voltage for the board and it not only fixed the hum but also fixed some other small issues I had been having.
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Leeds
Leesburg, VA