Добавлено (11.09.2020, 16:50:18) --------------------------------------------- this component is heating up because the owner of the device instead of using the 5v supply used a 12v supply to power the device
I see an inductor close to it so I assume thats a switching regulator. I see there are more such sot23-5 on this board. Can you check what is U12, U13 and U14 are? If they have same markings?
I am afraid that you need trace the pins and draw a pinout. What is the input voltage for this device on the power jack? I see one 5v test point, check if it connects to one of the pins on the S1Axx.
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