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Need help fixing the terminal connection on LG speakers

Discussion in 'Troubleshooting and Repair' started by rilij, Jul 23, 2014.

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  1. rilij

    rilij

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    Jul 23, 2014
    Hi all,

    I have some LG speakers with which the left terminal connection has decided to stop working, i would really like to repair it but have no experience with this sort of thing!

    Ill attach a link to the speakers user manual and an image of the connection type.

    Any advice and help (such as what part I need and how to replace it) would be greatly appreciated.

    http://www.manualslib.com/manual/242885/Lg-Ht321dh.html?page=19#manual

    Many thanks!
     

    Attached Files:

  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    It's a very fuzzy image, but they look like the types of connectors where you push a lever, a hole opens up and you stick the wire in. Releasing pressure from the lever causes a metal contact to press against the wire.

    There are only a few things that can go wrong:
    • The spring is weak or broken and insufficient pressure is maintained against the wire to make good contact.
    • The wire is insulated or excessively corroded or dirty, or it's so long it makes contact with something it shouldn't
    • You can't get the wire in
    • The contact is broken off inside so while everything appears correct, it's not connected to anything
    • There is another fault outside of the connector and immediate end of the wire (e.g. dead amplifier, dead speaker)
    Does the speaker work in the other channel (i.e. swap them over)?
     
  3. rilij

    rilij

    4
    0
    Jul 23, 2014
    Hi Steve,

    Yea sorry about the image quality, buy you're indeed correct on the type of connection. I have swapped them, and the left speaker works when connected to the right channel.
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    OK, assuming nothing is obviously wrong with the left connector it's time to open it up and take a peek inside.
     
  5. rilij

    rilij

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    0
    Jul 23, 2014
    Just screwed the top off and this is my view (attached image)

    There were also two screws I've removed from the back which were either side of the 'speakers' section on the back.

    Tried giving it a wiggle but wont come loose.

    What next? :)

    Sorry for image quality the camera on my tablet isn't the best
     

    Attached Files:

  6. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    What is this device? Those don't look like speaker outputs.
     
  7. rilij

    rilij

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    Jul 23, 2014
    Oh sorry, it's the console thingy the speakers plug into
     
  8. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,496
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    Jan 21, 2010
    I've skimmed over the manual you linked to but I don't know what the thing is. Telling me it's a console doesn't help. Is it a CD player, a TV, a game console?

    What is the rated output power?

    Are the speaker just speakers, or do they have inbuilt amplifiers? (they'll have a separate power connection in this case).

    The image you've shown doesn't show anything I'd expect to see near the output of anything with more than a very low power output. Otherwise I'd expect to see heatsinks and/or moderate to large transistors.
     
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