Electrical – Extremely low volume on headphones after jack repair

headphonesresistancesoldering

My headphones all of a sudden stopped working in one ear, then both. Same old story, I cut open the plug saw 5 wires (it's a TRRS plug, mic and button + headphones). The wires are

  1. Red (Right Of course)
  2. Blue (Left of course)
  3. Golden (ground of course)
  4. Green (no clue)
  5. Golden and Blue twisted together (no clue)

Just to start off, I stripped the wires, burned the enamel coating, and re-soldered the Red, Blue and Golden wires to old jack only as below-
P.S – picture just for reference
plug wiring

  1. Blank
  2. Ground
  3. Red
  4. Blue

Plugging in the headphones to my laptop (which has a combo 3.5mm jack) I can hear sound on both earcups, but the sound is extremely low. My soldering is pretty shabby, so I'm suspecting that my bad soldering has increased the resistance so much that sound is low, but I'm not sure.

Why is the volume so low and how may I fix it?

Best Answer

I just have fixed such issue several days ago. Most probably you have issue with ground wire being broken. Sound is low level because now, without ground wire, you have two speakers connected in series.

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