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Time：2021-09-18Views：0
Some customers buy old cooling fans in the market, just want to try samples, the second-hand stock always has some unsatisfactory places, in fact, it only needs 2 lines, one positive and one negative work, but the second-hand goods are three lines How to do it?
Of the three lines, the red line is positive, the black line is negative, and the third is the functional line. The yellow, blue, and green lines are generally FG and RD signals. A few of them are PWM functions. The wire can be cut, the heat dissipation performance of the cooling fan is not affected, but the signal function is missing if it is cut.
But it is best not to connect the third line with the red positive line. Some designs may burn out the circuit. It is still so big to cut off the third cooling fan directly.
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