Repair Broken Headphone Cable: Connecting Wires, Replacing Insulation, Blue, Green & Red Colors

As in the title, I do not know how to connect the broken wires from the headphones. It stopped almost at the same jack, I thought I would pull the insulation and twist it normally, but it didn't work like that. I took the original spare cable from these headphones and thought about connecting it somehow but I don't really know how. anyone got any error to make it work? I am sending pictures of these cables. there are blue, green and a spare something like gold, and normally from the headphones green and red.

Soldering iron, tin and preferably rosin separately, heat the ends of the cables with a soldering iron in rosin so that some of it remains on the cable, then add tin and you also need to heat a little so that the varnish comes off the cable until the tin starts to grab and then again some rosin and tin. These are varnished cables, so you need to heat them longer so that the tin sticks, if you do it sensibly, you solder these cables where needed. I advise against methods with heating with a lighter, because after something like this, they will not be tinned nicely because the copper will be overheated.

This is probably a face wire often used in miniature headphones. Each core is twisted from several cores with a smaller cross-section, and these are additionally covered with insulating varnish. Therefore, it cannot be twisted effectively, because it is difficult to carefully remove the insulation from these small "strings", so as not to tear them. You can combine this by first removing these colored reinforcing fringes. Then gently scrape the veins, but gently enough not to tear them, and finally solder with flux. As a flux, I suggest using the Polopiryna S tablet in this case - it really is very effective. You just have to try not to inhale all this while soldering (and it smokes a lot).

vieleicht wrote:

Then gently scrape the veins

In 99%, you don't need to scrape anything, the varnish will dissolve itself under the influence of a soldering iron. The rest of the advice is OK. And at the end, insulate with heat shrinks and, if necessary, glue with some glue.