A sound technician brought this head phones for repair. The left side of that head phone was working.

The other side was completely dead, not even a distortion.

dynamic stereo headphone repair

This is a professional high quality head phones used by sound technicians in the field but was a little bit old and needed good quality maintenance.

dynamic stereo headphone fix

Four screws on both side speakers need to come out to see what was wrong. After the screws were taken out; I could see the inside speaker. Very thin but high quality wires soldered inside

how to fix headphone

After testing, I realized that the two red wires are hot, the gold ones are the ground and the return is the grey wire. I did continuity testing between the two speakers and the main stereo plug; I came to conclusion that the ground wire was loose somewhere in the headphones.

Replacing the wire inside those headphones is going to be tricky and I hate to work on details thing like that.

how to repair headphone

Tracing the fault was easy but repair the fault was really tricky. I bought a new audio cable and cut the plugs off and used the cables inside to connect the red and the ground wires. It is easier replace both instead of just one. It will also look good.

parts in headphone

These are the torn old ground wire that I discovered inside and once I replaced the ground and the hot red wire, the sound was loud and very clear. Another happy customer and of course Mission accomplished.


This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.

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Jestine Yong works as an Electronics Repair Lecturer in Kuala Lumpur Malaysia and his training website is http://www.NoahtechElectronicsTraining.com. You can check out his repair blog at http://www.JestineYong.com

2 comments on “Dynamic stereo headphone repaired. Sony MDR-7506

  1. Parasuraman says:

    Good! I know, repairing a headphone is a pain!

  2. Royce says:

    Yes I agree, I just recently repaired a pair of my own AKG headphones, loosing sound on RHS, the wiring was a real challenge to solder, took me three attempts to fix it, but they now work.

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