- Joined May 22, 2020
I have a small 6W uv water sterilizer that ceased working after a small leak. 120V unit with 350V output. I opened it up and saw a blown component on one leg of the input ac connector. Not much of it was left to identify other than it was small and looked glassy. I assumed iniitially that it was a simple fuse but on closer exam saw it was labeled "fr" which I presume means fusible resistor. My question is what was its likely resistance? DC impedence of input side without fr is 1.2 ohms. I presume it's feeding a small step up transformer but hard to follow the circuit details on the small pcb. I don't know there wasn't any downstream damage as well but thought I'd try to resurrect. I assume it was about 2k ohms but any help with my limited info would be appreciated.