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Old 05-21-2022, 04:55 PM   #2
R_J
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Join Date: Jun 2012
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Default Re: Strange Power Supply Behavior on Skyworth 55U5A14G

This is an always on power supply that outputs 12 volts at low current, The stb pin voltage is supplied by the main board and turns on the pfc circuit etc on the power supply so it will operate at a higher current to operate the tv/backlights etc.
The main board will likely have a 12 volt to 5 volt regulator.
The STB pin is the same as a PS_ON pin.

Last edited by R_J; 05-21-2022 at 05:07 PM..
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