Has any one tried repairing a Paxton Net 2 Door entry system 12V power supply, model number 411-501.
They all seem to suffer with the same dead fault, no 12V out put.
When defective they still have HT on the smoothing cap and the collector of the chopper transistor.
I notice two small 4 pin chips, I assume are Opto Couplers and 4 med size electrolytic caps, that must be suspect.
A year ago replacement power supply's were £40, so not really economic to fault find, but now they are a whisker short of £85 inc VAT.
They all seem to suffer with the same dead fault, no 12V out put.
When defective they still have HT on the smoothing cap and the collector of the chopper transistor.
I notice two small 4 pin chips, I assume are Opto Couplers and 4 med size electrolytic caps, that must be suspect.
A year ago replacement power supply's were £40, so not really economic to fault find, but now they are a whisker short of £85 inc VAT.