Hi
My first post here, hello all.
I have a burnt out resistor on the mains input to a small low power switch mode supply which powers the microprocessor board on a dehumidifier.
The resistor it totally burnt out, open circuit, value unknown.
I've searched online for the circuit, but nothing found, it is a 'Silvercrest SLE420-A1 Dehumidifier', resistor R5.
The resistor in question is right on the mains input of the circuit between the mains fuse and the bridge rectifier and in parallel with an 1100uH inductor, the resistor is in line with the live mains and all current used by the SMPS must pass through this component.
I've looked at some smps circuits online to get an idea of what sort of value to try but all the circuits I have found don't have anything except a fuse and a thyrstor before the mains rectification.
I feel it must be part some sort of filter along with the inductor and is probably fairly low value, about 10 ohm or less but I don't know much about switching power supplies, any clues folks?
Thanks
Neil
My first post here, hello all.
I have a burnt out resistor on the mains input to a small low power switch mode supply which powers the microprocessor board on a dehumidifier.
The resistor it totally burnt out, open circuit, value unknown.
I've searched online for the circuit, but nothing found, it is a 'Silvercrest SLE420-A1 Dehumidifier', resistor R5.
The resistor in question is right on the mains input of the circuit between the mains fuse and the bridge rectifier and in parallel with an 1100uH inductor, the resistor is in line with the live mains and all current used by the SMPS must pass through this component.
I've looked at some smps circuits online to get an idea of what sort of value to try but all the circuits I have found don't have anything except a fuse and a thyrstor before the mains rectification.
I feel it must be part some sort of filter along with the inductor and is probably fairly low value, about 10 ohm or less but I don't know much about switching power supplies, any clues folks?
Thanks
Neil