How to Fix a Loose DC Jack

Written by lisa wampler
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How to Fix a Loose DC Jack
To fix a loose DC jack, you must be able to solder. (Comstock/Comstock/Getty Images)

DC (direct current) jacks are often used in electronic components that require batteries and also offer a jack for plugging the unit into an AC (alternating current) outlet. The jack accepts the power from the electrical socket and sends it to a transformer so the transformer can convert the power back to direct current. In most cases, a DC jack mounts to the electrical circuit via a soldered connection to the PCB (printed circuit board.) When the solder joint weakens or breaks you must fix the loose DC jack to prevent intermittent power issues.

Skill level:
Moderately Easy

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Things you need

  • Screwdriver
  • Soldering iron
  • Solder

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Instructions

  1. 1

    Remove the screws that hold the chassis together so you may access the PCB board. In most cases, the chassis is held together with Phillips screws, but in some cases you might require the use of a socket set, Torx driver or Allen wrench to remove the chassis screws.

  2. 2

    Locate the PCB board that has the DC jack mounted on it. This is easily done by looking at where the cable plugs into the DC jack and then looking inside the chassis to match the location.

  3. 3

    Remove the screws that secure the PCB board to the chassis and lift the PCB board from the chassis. Be careful: Often, wires soldered to the PCB board lead to other components.

  4. 4

    Turn on your soldering iron and allow it to heat up. Place a small amount of solder on the tip of the soldering iron.

  5. 5

    Locate the soldering lugs for the DC jack. They protrude through the PCB board. You might find two, four, six or eight lugs. They are all located close together and directly under the jack.

  6. 6

    Solder any broken joints with the soldering iron. Do not overheat the PCB board. Solder one lug at a time and make sure you do not solder any lugs to each other.

  7. 7

    Place the PCB board back into the chassis and secure the PCB board with the screws.

  8. 8

    Place the chassis back together and secure the two pieces together with the screws.

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