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SOLVED: type of transistor used at hard drive thermal sensor inside iMac a1224 - iMac Intel 20" EMC 2133 and 2210 - iFixit
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T2GM1 DELL HARD DRIVE THERMAL SENSOR CABLE FOR DELL PRECISION T7600 / T7610 / TOWER 7910 ( T7910 ) - HDD
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What's the purpose of the pins besides the SATA connector in a hard drive 3.5"? | Tom's Hardware Forum
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