I have a satellite receiver with no power and I did the voltage test with light bulb across the fuse. I found this component to get hot but I am not sure what type of resistor or capacitor it is. On the board it says TH1 and it is dark in color. The part has 10SP 010 written on it. Can I replace it with something similar. Thanks D.D
It was a NTC thermistor and the function is to limit the inrush current that can kill the components in the power section during start up. An NTC thermistor has a relatively high resistance at room temperature, so at turn-on, it limits the current charging the load’s rail capacitors. As the thermistor heats up, its resistance drops, so the power supply becomes relatively low impedance. You can test it using an analog meter set to x 1 ohm and it should show a low ohms reading. In your case i guess the thermistor have no problem and it could be in somewhere else. Hope this helps!