This tutorial is to modify your Motorola stereo headset to accept any standard headphone jack. This modified headset has been tested on the Motorola L7 phone. Everything you do with your phone, headset, cat, dog or anything, is none of my business and I will not be responsible for anything that results in the attempt of this modification. This modification is not hard (at least I didn’t think so) and becomes extremely useful especially if the original headphones break.
Required tools:
Soldering Iron (preferably a fine tip)
Solder
Small flathead screw driver or any small flat object
Hot glue gun with glue
Razor or wire stripper
Required components:
Motorola stereo headset (As seen here)
3.5 mm female audio connector
Additional wire (if you cut too short)
Basic knowledge of how to solder would be a good thing
1) Prepare everything to be soldered. If using a base 3.5 mm audio connector cut 3 strips of wire and strip each end. Tin each wire as well. If you’re using a salvaged connector like mine, strip each wire and tin each end.
2) Take the Motorola stereo headset and pry off the cover with the flathead screw driver, try not to crack or bend any of the plastic, it’s not hard to screw it up.
3) Once every thing is prepared, we can begin soldering. Here is a close up of the board inside the Motorola stereo headset.
Each point that needs to be soldered is colored. Desolder or cut off each wire connecting to these colored points. The original earphones will not be used in this tutorial ( Note, if you want to use them still, get a 3.5 male audio connector and use them to make a new set of earphones, then u could just plug them into the modified headset, or any other audio device)
4) Now, solder the new 3.5 mm female audio connector by connecting the following points
Red - Right
White - Left
Yellow - Ground
If you are not sure what points on your audio connector are which, use www.pinouts.ru. The deepest into the connector is ground, middle is Right, and the tip is Left
5) Make sure everything is seated properly inside the enclosure; optionally, you should add hot glue to the wires that was just installed to prevent damage from excessive force on the connector.
6) Close every thing up and it should work with any set of ear/headphones! This is a picture of mine.
If anything is wrong, reflow each soldered point and check for bad connections with multimeter.
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