Individual speakers, or, as they are called, headphones, are designed to listen to information (speech, music). They are very often used as a headset to communication devices (walkie-talkie or mobile phone).
Electric circuit stereo headphones.
Almost any user of these devices at least once faced with a situation where the headphones cease to function. Information on how to properly solder the headphones will help avoid the cost of purchasing a new device.
Finding out the cause of the headphone malfunction
The most likely cause of a device failure can be the rubbing of wires inside connecting cables, provoked by frequent bends. Most often this occurs at the point of connection of the wire to the earphone or plug. Occasionally there are damage to the cores in the middle of the cable, but this happens in most cases due to a one-time mechanical effect (the cable was pinched by a door, a box, etc.).
Determining which of the headphones breaks the cable is usually easy. When playing music, the damaged speaker is silent.
To find the place of the fracture, you need to bend the wire at an angle of 90 degrees, through the thumb along the entire wire.
If the conductor wire is not completely frayed, then you can determine the place of the break using a tester. Measured resistance between the common wire and the wire going to the headphone. The principle of determination is to change the instrument readings when the spatial position of the wire changes. If the contact is not broken, then, like a wire, the resistance values reflected by the tester will be constant. A different picture will be observed when the cable is partially frayed: the readings on the screen will be very sensitive to the slightest deviations of the wire from the original position.
Theoretically, even the so-called folk methods can be avoided. Detecting a headset with a partially compromised contact integrity can help the characteristic crackling sound in the speakers, which is heard when the cable is swaying.
It is generally accepted that troubleshooting in headphones is carried out from top to bottom, that is, directly from the headset itself to the plug. The most characteristic places of breakdowns are localized where the connections are located. Knowing the faulty channel and having disassembled the junction of the wire and the loudspeaker, it is possible with 50% probability to find the fault location.Back to table of contents
Direct soldering process
Headphone repair is reduced to the restoration of contact in damaged veins.
For this you will need:
- soldering iron;
- office or construction knife.
To ensure complete confidence in the elimination of the problem area, a piece of cable approximately 1-3 cm long is cut from the earpiece.
To remove the protective insulating body, you must clean the floor an inch (1.25 cm) of the outer sheath using nippers or a construction knife.
Using a construction knife, the external insulation of the cable is cleaned. Inside there are two wires marked with different colors. The left channel is most often marked in red, the right channel is marked in green, the common channel is marked either in blue or yellow. Sometimes the common channel is a copper uninsulated wire.
At a site of about 0.5 cm from the end of the wire it is necessary to remove the insulation.
Depending on the material, it can be removed in several ways:
- Polymer insulation neatly, in order not to damage the conductive material, is removed with a knife.
- Varnish and paint are removed by burning with a soldering iron or mechanically using a knife or fine emery cloth.
The stripped ends of the inner cores are filled with solder. The soldering iron is turned on in the network and kept for the time necessary for its heating. Then a small piece of solder is taken with the tip of the soldering iron tip. The stripped end of the wire is mounted on rosin. The tip of the soldering iron is a uniform distribution of the molten solder over the entire bare surface. Wires are ready for soldering.
Simplifying the process, you can combine tinning and removal of lacquer insulation.
To do this, you must additionally take a tablet of acetylsalicylic acid (aspirin) or any aspirin-containing medication. Even expired pills will do. So, before you run into the street, you need to look into the home first-aid kit.Back to table of contents
Headphone repair recommendations
Headphone wiring scheme.
Another way to combine the removal of varnish and tinning involves the use of fine-grained sandpaper. A small piece of rosin is placed on the working side of the emery paper. It fits the end of the wire to be tinned. The tip of the heated soldering iron takes a small amount of solder and presses the wire. When the rosin melts and the wire heats up, it is pulled out of the soldering iron tip with a little effort. Grain abrasive while removing the heated and slightly softened insulation. At the same time there is a tinning. By repeating a similar procedure, you can get evenly covered tip of the core, ready for soldering.
The body of the cut off earpiece is carefully disassembled with a knife along the assembly line. The tip of the heated soldering iron is placed in the contact area of the old wires. As soon as the solder softens, the wires are immediately removed.
The cable with the stripped ends is inserted into the hole in the headphone case. It is very important not to forget to tie a safety knot on the cable. It will preserve the integrity of the contacts in case of unforeseen jerking of the wire, taking over the entire load.
The ends that are ready for soldering can only be soldered to their contact points on the headphone housing. It is important to observe the correct connection of the contacts in accordance with the color marking.
It is very convenient to solder the headphone wires, using a wooden clothespin as an auxiliary tool. It will work as a mini-clamp and will not only help to fix the workpieces securely, but also save fingers from possible burns.
A similar procedure should be followed when there is a need to repair the cable in the connection area with the plug:
- cut the cable;
- strip the insulation;
- to cheat mounting ends;
- if necessary, disassemble the body of the plug;
- solder the ends into place;
After restoring the device, you can enjoy the sound of your favorite music in your own repaired headphones.