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Hello, just out of curiosity. My colleague got its notebook broken (seems something got sort circuited) and it seems it took the Samsung MZ-VLW2560 drive with itself (the drive, connected to external adapter only heats and is not detected). I had quickly used multimeter over the drive and had found out, that chip S2FPS04X01 A1708 604C858 has several pins connected or shorted to ground. I am not able to find datasheet, but I suppose its some kind of drive IC and since its in QFN-36 body, that only thing connected to ground should be the plate underneath the chip, not the side pins. Is my analysis correct and if yes, should I search for the chip and try to replace to get the data out (colleague had already “mourned” data loss I only want to try it for learning purposes) or am I completely mistaken? Thanks, Regards, Petr Sourek
One of the biggest misconceptions is the difference between the negative side of a logic circuit and ground. They are not the same! I can’t directly answer what’s going on here but we look at the these two spaces differently. The negative side connections are often filtered to ground to prevent noise from either entering or exiting the circuit. Just like your AC outlet/line cords the Neutral side is not the same as the Ground. Each is treated differently, and yes there is a point where the two come together in your breaker panel.
