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modding a pc power supply
I have a salvaged pc power supply I use as an adjustable bench supply.
But it won't go above about 14.9 volts. Apparently it has an overvoltage protection circuit. The board has a TL494 (house-numbered equivalent), and the only other chip on the board is a dual comparator. The power supply is a Fortron/Source FS-250S40G. I have another supply that also hits a ceiling when I adjust the voltage, a Falcon Technology PE-250X with a 494 chip and a 14-pin chip labeled DBL 339. Is there some way I can disable the overvoltage protection on these power supplies? |
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