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JFP1 connection I've recently bought PC components in Germany, this is actually the first PC I'm building myself. Everything went good at first, but when I got to the JFP1 connection, the one for the ON and RESET buttons and the LED lights on the front of the chassis (Coolermaster CM690), I encountered a problem... On the mainboard (K9A2 CF-F) I had 9 pins with POWER, RESET, POWER LED and HDD LED written next to two pins each, of which 1 had a + and 1 had a -. That's all as it should be. On the cable coming from the front of the Coolermaster, though, I only had 4 series of two cables with the same text written on it as on the mainboard, but no + or - anywhere on the POWER, RESET and HDD LED couples. (With couples I mean the + and - wire together, you probably understood but I'm saying just to be sure). Strangely, the POWER LED exists of two wires not attached to each other and they have + and - written on them... But the ones that don't have + or - (AKA the POWER, RESET and HDD LED couples) do have a triangle!!??? on one of the two wires. I need to know wether this triangle means + or -, so I can correctly connect the cables to the motherboard. Yours desperately, Yannick

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  • Yannick Verhoog Oct 17, 2008

    Well, I've done some research as well...
    From what I read on WIkipedia, I understood that the triangle can be a diode, which would make sense for the LED lights, and that the wide end of the triangle is the anode, and the tip opposite to it the kathode. The anode should therefor be connected to the - , and the kathode to the +. For the POWER and RESET buttons, though, I wonder if they contain a diode, for those aren't needed there...
    And if there are no diodes, does it matter which wire I connect to a pin??
    Unfortunately, these answers only raise more questions, because I'm not really sure of what I've found.
    If someone would confirm or deny what I'm saying here I'd be very grateful...

    Thanks already!

  • Yannick Verhoog Oct 17, 2008

    I've connected a battery to the LED, and after a little messing around it worked. The arrow apparently indicates the kathode, the + on the mainboard.

    Consider this topic closed.

    PS: how do I actually close a topic. I've still got a problem in my list which is 3 months old...



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Hi Yannick,
For the POWER and RESET connectors, it does not matter which way you connect the pairs. Both ways will work. The HDD LED coupler will only work if connected the right way. You can however try it both ways until the LED works. You cannot damage your board if this is connected the wrong way.
Hope this solves your problem.

Posted on Dec 03, 2008


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