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What if any, is an acceptable resistance here?

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    #1

    What if any, is an acceptable resistance here?

    On this motherboard(and another like it) I'm getting beeps on diode mode at these coils. I posted the resistance readings to ground. At the risk of sounding dumb, shouldn't all coils be OL on my multimeter when measuring resistance to ground?

    https://imgur.com/A0oCmAz
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    #2
    Re: What if any, is an acceptable resistance here?

    Originally posted by survivalbloke View Post
    shouldn't all coils be OL on my multimeter when measuring resistance to ground?
    https://imgur.com/A0oCmAz
    Undamaged coils will show as a short on a regular multimeter, not open circuit. The resistances you measured there are very likely not the resistances of the coils but resistances of components located between the coils and ground.

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      #3
      Re: What if any, is an acceptable resistance here?

      Originally posted by survivalbloke View Post
      On this motherboard(and another like it) I'm getting beeps on diode mode at these coils. I posted the resistance readings to ground. At the risk of sounding dumb, shouldn't all coils be OL on my multimeter when measuring resistance to ground?

      https://imgur.com/A0oCmAz
      resistance on coils is ok. it can go down to 1-2ohm on CPU or GPU main power phase

      Comment

        #4
        Re: What if any, is an acceptable resistance here?

        Originally posted by ktmmotocross View Post
        resistance on coils is ok. it can go down to 1-2ohm on CPU or GPU main power phase
        Much appreciated! I'm trying to hone my board skills more and this helps.

        Comment

          #5
          Re: What if any, is an acceptable resistance here?

          Originally posted by Traceless View Post
          Undamaged coils will show as a short on a regular multimeter, not open circuit. The resistances you measured there are very likely not the resistances of the coils but resistances of components located between the coils and ground.
          Perfect, and thank you. I've got a lot to learn! I got the wrong idea from what I now know as a bad youtube video. I was looking for a fast way to find shorts on a board. Well, not necessarily to pinpoint the short quickly because I would do that with voltage injection and a thermal camera. More like just seeing which power rail the short was on. I was clearly on the wrong track lol.

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