Yamaha CS80

Fellow CS-80 owners, with the power off, could you please do me a solid and measure the resistance between the +15V power rail on the card riser (the lower bar that the cards screw into) and ground. I am trying to figure out if the 70 ohms I'm getting is normal or if this is indicative of a partial short. Thanks! Cheers, Jonathan


I don't have one here, but 15V/70 ohms = 214 mA, which seems a low amount of current for all of those voice boards.  But since it's not powered on, it might be a reasonable impedance for this situation. Certainly 70 ohms is nowhere near a short circuit, given the large amount of circuitry present. It's not clear to me if a shorted component/capacitor would NOT show a short when no power was present, but then go short when power was applied...I don't think so...


jkjelec