Solder AC to laptop? Wiring code ?

Discussion in 'Computer Hardware' started by Parangles, Mar 18, 2017.

  1. Parangles

    Parangles

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    Hello all- the AC connector on the laptop has gone- cant bother
    get/install new socket. Want to solder connect the power/transformer
    cable directly to the sockets wires.(' DC in cable' in manual ) There are
    5 wires internally (2 red 2 black, 1 blue) going to the socket but
    only two, no ground coming in. I could pair the reds and the blacks but what do
    I do with the blue ? The pin in the center of the socket is + and the outer ring is -.
    Its an old Thinkpad but their forum seems to be dead/defunct.
    Please see photo- thanks.

    No photo - "There was a problem uploading your file "
     
    Last edited: Mar 18, 2017
  2. glc

    glc Forum Administrator Staff Member

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    Reduce the file size to 2 megs or less and resize it to no more than 1024x768 pixels, then drag it from your file explorer into the forum reply box.
     
  3. Parangles

    Parangles

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    File is 800 x 718 , 68kb. Tried via the toolbar mountain/'image ' icon and also
    via "Upload a File' button- same msg. Linux ?

    Edit- dont think Linux can do drag and drop from one window to another.
     
  4. Parangles

    Parangles

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    Thanks glc



    thinkpad AC.jpg
     
  5. tmathews

    tmathews

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    Offhand, I'd guess red = +, black = -, blue = shield (not connected on the cable side). If you've got an ohmmeter, just check continuity between the socket and the wires. Which model ThinkPad? I've had good luck finding laptop motherboard schematics online, and that would tell you about the motherboard side of the white connector.
     
  6. Parangles

    Parangles

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    "I'd guess red = +, black = -, blue = shield"
    Thanks for the encouragement! It worked out fine with some wads of hot glue inside and out to
    keep it in place. Discarded the blue- think that is probably for the battery charging circuit,
    and thats long gone.
    Just using this as a iTunes jukebox in my living room.
    Its a major hastle getting anything down here from the USA- theft at post office,
    customs forms, duty etc etc.
     
    Blaster3 likes this.
  7. Jbc223456

    Jbc223456

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    I would assume the same lines as tmatthews, but I think the blue is for V+(sense), which would limit charging capacity to the battery once it has reached a certain limit, and then only trickle in power as needed to keep the battery topped up.