p870tm 2nd CPU fan port!

Discussion in 'Sager and Clevo' started by tanzmeister, Jan 9, 2018.

  1. poprostujakub

    poprostujakub Notebook Consultant

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    Yellow pin is for speed measurement.
    Leave yellow and blue wires unconnected and connect red wire with red wire of main fan.

    In nearly all Clevos fan is drived by direct current, not PWM. Speed regulation is implemented by changing supply woltage via linear voltage regulator. This regulator is drived from little RC filer, that averages PWM signal from EC.
    This four-wire fan can be also driving like three-wire fans, just leave fourth wire unconned.
     
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  2. ole!!!

    ole!!! Notebook Prophet

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    so right now as you can see in the picture, red is to the right pin1 which is 5v, black is to most left pin4 ground. theres pin 2/3 not connected. do i connect the blue to either pin2/3, or do i splice the original CPU fan so both fan can be controled by primary cpu fan port.

    also the primary cpu fan all black in color not sure which is which, pin 1-3 from top to bottom, which one is 12v/ground/control?
     
  3. poprostujakub

    poprostujakub Notebook Consultant

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    Connect blue wire to pin 2 - if EC have a module to control second CPU fan, fan should start to change speed along with main fan.

    On main fan there is 12V/GND/CTRL, pins 1, 2, 3. You should buy cheapest multimeter like "830" model (there is a lot of different prefixes and suffixes in it's name, depending on manufacturer. In Poland we have this multimeter with names like M830BUZ, DT-830D, but all of them looks same).
     
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  4. Prema

    Prema Your Freedom, Your Choice

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  5. Meaker@Sager

    Meaker@Sager Company Representative

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    Yes, pictures say a thousand words, especially when it comes to wiring ;)
     
  6. ole!!!

    ole!!! Notebook Prophet

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  7. Meaker@Sager

    Meaker@Sager Company Representative

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    I believe it just maxes out speed wise at the moment.
     
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  8. ole!!!

    ole!!! Notebook Prophet

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    thats why asked if connecting pin2/3 will gain control over the fan.
     
  9. ole!!!

    ole!!! Notebook Prophet

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    20180216_195326.jpg

    20180216_203948.jpg

    left fan is the one without lid, right fan arrived today and it has a lid, just need to mount it on and already came with 2 screw holes, gonna look pretty gud!
     
    Last edited: Feb 17, 2018
    Papusan and sicily428 like this.
  10. Meaker@Sager

    Meaker@Sager Company Representative

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    Connecting the pins together? No that would just short two different lines.
     
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