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by mulmen
1220 days ago
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I have a "reset board" for WPC games that is many years old at this point. It piggybacks on the power connector from the power board to the system board and steps down the unregulated 12v supply to power the 5v rail, bypassing the power board's 5v which can become unreliable as voltage regulators age and fail, triggering a watchdog on the system board that causes a reset. It is a plug-in mod that is reversible (I actually do not currently use it). Also you can buy new boardsets for System 11 machines in both kit and complete form. They are electrically identical to the Williams parts but use modern components. They even come on red PCBs like the Williams development boards. |
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