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    My NX9420 adapter has 3 wires on the DC part, why?

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by zipper_, Apr 19, 2008.

  1. zipper_

    zipper_ Newbie

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    I wonder why this adapter has 3 wires on the DC-connector. The outer shell appears to be negative while the inner walls appear to be postive when I measure with my DMM. So what is the middle pin used for? I measured the voltage from this pin to the negative part and it seems the volatge is dropping.

    I need to know what to do as I am going to join this uncommon DC connector to a 12v DC adapter, which only has 2 wires.
     
    zipper_, Apr 19, 2008
    #1
  2. flipfire

    flipfire Moderately Boss

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    3rd/middle pin is ground i believe
     
    flipfire, Apr 19, 2008
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  3. zipper_

    zipper_ Newbie

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    I highly doubt it is. The ground part is usually located at the outer parts of the connectors, that is a widely used standard
     
    zipper_, Apr 19, 2008
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  4. flipfire

    flipfire Moderately Boss

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    OHH wires.. sorry i thought it said prong.. my bad
     
    flipfire, Apr 19, 2008
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  5. zipper_

    zipper_ Newbie

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    Why do some laptops use 3-pole systems at all? Any idea?
     
    zipper_, Apr 19, 2008
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  6. K-TRON

    K-TRON Hi, I'm Jimmy Diesel ^_^

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    The third wire, is actually just a wire. It is used to give the wire durability and less flexibility. Its usually just a magnesium strip, which is flexible, and stronger than standard wire.
    You will have no problems going to a 2 wire adaptor

    K-TRON
     
    K-TRON, Apr 19, 2008
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  7. zipper_

    zipper_ Newbie

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    And the inner wire isn't intened to supply the laptop with the main voltage? I measured at least 19 voltage from the inner wall of the connector and about 19 volt from the thin middle pin as well.
     
    zipper_, Apr 19, 2008
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  8. zipper_

    zipper_ Newbie

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    I mean that the inner wall of the connector act as a positive point while the outer wall of the connector act as groun/negative
     
    zipper_, Apr 19, 2008
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  9. geppomau

    geppomau Newbie

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    nx9420 - power supply problem.
    Please anyone of you please could verify the voltage at the connector of nx9420 power supply ? I have a problem regarding my batteries charging and suspect my power supply has a malfunction.
    In my set, the voltage between the inner pin and the outer wall of connector is 19,35 V and the voltage between the inner and the outer wall is 19,90 V. Are these values normal ? Is normal an overheat of the bottom of PC under the mouse pad while AC connected ? Thanks a lot to everyone
     
    geppomau, Jul 6, 2008
    #9