1 Value of the Inrush current NTC or PTC resistor
Hello world. The first component that the current passes through in the power supply on the Behringer B1031A studio monitor speaker is a NTC or PTC resistor. It has stopped working and is dead. It has failed and the value has been burnt off. When I bypass it the speaker works fine but because it has purpose and I would like to stay safe I would like to replace it. I cant find a repair manual for it anywhere. Is there anybody out there that has an schematic for it and could tell me what component to order.
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I found a schematic for the 2031(https://www.electronica-pt.com/esquema/f...), but not the 1031. It may still be relevant depending. A lot of times circuits will get reused on similar products from the same manufacturer. Are there any component markings on the board? Many times the components will have a small label next to them to help identify which component it is on the schematic. Pictures would also help! Feel free to add a picture in to the original post.
por Alisha C
Hi, I found that schematic too but it is a completely other circuit. The component is completely burnt NTC termistor and is located directly from the mains, through a fuse in to the NTC termistor. From there to some noise suppressing circuitry in the switched power supply. The mains voltage is 230 volt and and the power draw is a maximum of 200 watt. As I understand this NTC termistor acts as an inrush current limiting device. Does anybody know what value the NTC termistor should have. Is it possible to work that out from the 230V / 200 Watt maximum power draw?
por Timo Romppainen