i have intel dh67cf motherboard ,i found the system fan have some problem,when the temp goes up,the speed of fan goes down,i found a part called 12w27,that in the fan control circuid damaged.it is a n-mos or not,what it’s parameter ?thanks
the part located in this area of the board(two n-mosefet?),beside the superio IC.
looks like this
similar to this kind of electronic part
but the silk-scree is this
there are two 12W27,on board test of the good one is like this,3v pwm in ,3v pwm out inversely.
The bad one has no output signal.Then I get a part silked 702:z from other kind of board to replace this,the fan can be controled in the right mode(tempreture ups speed ups),the out put like the following red line(a little lower than normal).So I want to get the exect type of the part,enable to make the scope seems good.Thanks.