As title says, I’m trying to run a 60Hz UPS (specifically a CP1500AVRLCD) on a 50Hz supply via a step-down transformer. The unit pretty much refuses to turn on, which I suspect is because a) it must be connected to AC power to turn on for the first time, and b) a 60Hz detector is telling it that mains power is not present.
Anyone know how I can modify the timing circuit to detect 50Hz instead? I’m pretty sure the lower frequency won’t hurt anything (and I’m willing to risk losing magic smoke if it does). I assume I can probably add or swap a resistor, but I can’t find a service manual or schematics anywhere online, and I’m not great at figuring out a circuit board visually. Any help is appreciated!
Anyone know how I can modify the timing circuit to detect 50Hz instead? I’m pretty sure the lower frequency won’t hurt anything (and I’m willing to risk losing magic smoke if it does). I assume I can probably add or swap a resistor, but I can’t find a service manual or schematics anywhere online, and I’m not great at figuring out a circuit board visually. Any help is appreciated!