How to properly solder wires to a headphone plug?

The headset jack differs from the headphone jack in that it has an additional fourth contact, so things are a little more interesting with them. And the reason for this is the presence of a microphone, which elevates the headphones to the rank of a headset. Usually the main problem when trying to repair a headset jack is determining which wire should be soldered where. This is understandable, most often the problem is that there are 4 contacts on the connector and 5 wires. And even if there are 4, then who goes where...?

The entire headphone repair process is shown in detail in my new video:

Repairing the headphone jack has already been discussed in one of the articles.

Headphone repair

If you have minimal skills in working with a soldering iron and a tester, broken wires can be repaired.

Troubleshooting

In working headphones, the sound should be clear, without crackling or loss of sound, and the voice of the speaker at the other end of the line should also be without crackling or interruptions. If this is not the case, then there are two possibilities: a malfunction of the device or headphones. To check, the headphone plug should be connected to a known working device:

• problems remain - a malfunction in the headphones;
• the problems are gone - the device is faulty.

You can do the opposite: connect known-good headphones to the device:

• the problems are gone - the stereo headphones are faulty;
• The problems remain - the device is faulty.

In most cases, the reason is broken wires to the plug or “rocker” (volume control buttons) or to the speaker. The earphone or rocker should be disassembled and the wires soldered, and the plug should be changed or repaired.

Before soldering the wires going to the plug, determine the location of the break. This is done with a tester or multimeter turned on to check resistance:

1. connect the tester to the plug; bend the wire, following the tester readings;
2. when the cable bends at the break point at the plug, the device readings will change;
3. If the break is permanent, then there may be a malfunction or break near the earphone.

Continuity of wires

If the cable inside the plug breaks or it is impossible to remove the protective sheath from it, it is necessary to determine whether the wires match the speakers, microphone and control panel. In this case, different connection schemes are possible:

• the microphone and the rocker are connected using one pair of wires or different ones;
• sometimes the microphone is connected with a shielded wire;
• There is one common wire for all elements or one for each part.

First of all, before soldering the headphone wires, you need to find the ends going to the speakers. This is done with a tester or multimeter turned on to measure resistance:

1. strip the wires to 10 mm of insulation; if there is a shielded wire among them, then it goes to the microphone;
2. put on headphones and start ringing the wires one by one;
3. when connecting the tester to one of the channels and the common conductor, a crackling sound is heard in one of the phones;
4. to the left and right channel - in both.

If the headphones do not have a microphone, then the cable is soldered to the plug, and in the headset, after dialing the speakers, the wires going to the microphone and buttons are determined:

• 4 wires. The remaining one is connected to the microphone;
• 5 cores The remaining two are connected to each other and do not communicate with the speaker - they are connected to a microphone and soldered to the common terminal and the microphone terminal. If they are ringing with stereo headphones, then this is the control panel, and the microphone and both wires are connected to the microphone output;
• 7 cores These are two pairs - to the microphone and to the buttons. Soldered by color in parallel to the common and microphone terminals.

How to solder headphones to a plug

The plug is made of soft plastic, and the pin with slip rings is poured into it. To repair, the case will have to be cut and then connected using heat-shrink tubing of a suitable diameter.

A break in the wire going to the plug can be repaired by soldering:

1. cut the cable;
2. carefully cut the sealed plastic case and remove the plug itself from it;
3. remove cable residues from the housing using a thin drill;
4. the cable going to the headphones is stripped to the length required for soldering;
5. use a tester to check the functionality of the headphones;
6. tin the ends of the cores by 5 mm;
7. put the notched housing through the previously drilled hole onto the cable;
8. solder the wires to the metal middle of the plug, according to the colors of the insulation or the results of ringing;
9. the middle with a soldered cable is placed in a plastic case;
10. A piece of heat-shrinkable tubing is put on top and heated with a hairdryer.

The plug on the headphones is also replaced.

Headphone speaker repair

If there is no sound from one of the speakers, the reason may be a broken wire connecting to it. To repair a faulty earphone, you must open it. In large models, the cover is attached with screws, and in small ones - with latches or with glue. Such speakers are opened with a knife inserted into the gap between the covers.

The soldered wire must be secured inside. To do this, a knot is tied on it, or it is glued with superglue.

The disassembled speaker is assembled and, if necessary, the covers are glued to each other.

Knowing how to replace the wire and how to change the plug will help you save on purchasing new stereo headphones, and in order to solder the plug to the headphones, you need to know the pinout of the wires.

Preparation of components

Assembling new headphones for a computer or smartphone consists of several stages:

• preparation of necessary parts;
• checking the functionality of the cable, connector and speakers with a multimeter;
• connecting the wire to the plug;
• connecting the cable to the unit with a microphone from the input and output sides;
• soldering speakers to wire.

All the necessary parts can be cut from old headphones or a headset for an iPhone, Samsung or a smartphone of another brand. Some of them can be bought, but it is not profitable. In addition, the point of making homemade headphones is lost, since purchasing new parts will cost about the same price as a new gadget.

What is needed for work

To assemble new headphones, you will need to prepare the parts - plug, cable, speakers and microphone. In addition, you need a number of tools - a multimeter to check the functionality of parts, a soldering iron to attach wires to the speakers and plug, rosin, solder. If there is no such device, or the user does not have proper experience working with the device, you can solder the parts to each other without a soldering iron.

Plug

Preparing the plug begins by cutting it off from the old headphones. If the Jack works, it can be cut off along with a few centimeters of wire to facilitate further installation. A faulty plug can be repaired, but to do this you will need to disassemble the part, remove the old wire and attach a new one - this is if the problem is a damaged cable. Otherwise, it is recommended to use another plug and throw this one away.

Cable

The cable should have from three to five cores: 3-4 for headphones, 4-5 for a headset. The length is selected depending on the needs of the user. The shape of the cable does not matter. It is very easy to understand the wires: yellow is grounding, the other two will go to the speakers, and another one or two will go to the microphone.

Speakers

Working speakers need to be cut off from old headphones, after making sure they are working. Most often, old headphones do not function because the wire is broken. The plug fails less often, while the speakers are the part least susceptible to breakdowns.

Microphone

In order not to disassemble the box on the headphones, which contains the microphone, power button and volume control, it is recommended to cut the wire from the top and bottom of this block, stepping back about five centimeters in both directions. The main wires will then be connected to these sections according to the color of the cores.

How to solder wires to a plug depending on the type of plug

Let's look at how to solder wires to a plug, depending on the type of plug and the location of the contacts on it.

2-pin connector:

2-pin headphone jack

There is no point in describing anything in detail here, because in this case it is almost impossible to mix up the wires.

3-pin connector:

3-pin connector (soldering diagram)

The principle of soldering a plug to the headphones, if we have 3 wires, is as follows:

Plug 3 pins (soldering diagram)

It might also look like this:

Plug 3 contacts, option 2 (soldering diagram)

If we have 3 wires (right, left, screen), then solder the copper wire (screen) to the largest contact on the plug, as shown in the figure, and the colored ones (from the headphones) to the remaining two, observing the correct location of the wires.

In the case of 4 wires, carefully twist two copper wires into one and solder them in the same way as in the case of three wires in the figure above.

Soldering 4 wires to a 3-pin plug

Soldering 4 wires to a 3-pin plug

4-pin connector:

In this connector, two wires are responsible for the left and right headphones, one wire is for grounding, and another is for the microphone.

Schematically it looks like this:

4-pin plug (diagram)

Or like this:

4-pin plug (diagram 2)

Video on how to solder wires to a plug (4 pin and 3 pin)

How to strengthen the headphone wire

The difficulty lies in the plug itself, since this is the most dangerous place for the integrity of the cable. By lightly pressing on the plug or rotating the cable, you can find the position at which the two headphones will work. Then it is possible to argue that the difficulty lies in the connector.

Before starting repairs, it is important to understand what the most popular types of headphone jacks are and how they are connected. This will help you figure out how to solder when there are 4 or 3 conductors in the cable. In good brands (KossPortaPro, Philips, Sony, Sennheiser) a separate protected core is used for a separate channel; in cheap options, a common background is used for two channels

In good brands (KossPortaPro, Philips, Sony, Sennheiser) a separate protected core is used for a separate channel; in cheap options, a common background is used for two channels.

The strength of the connection largely depends on how you solder the wires to the plug. If the sound disappears (sometimes present, sometimes absent), first of all it is necessary to identify damaged areas and places of rupture. Often the wires break or the places where the headphones are attached to the 3.5 jack plug are damaged.

Jack plug

Nowadays, headphones made in the form of a zipper are popular. Having put on headphones or a headset, the user can fasten them “under the throat”. This way they wear less

If the shell is removable and it is possible to get to the contact on the speaker itself, then to repair the headphones you first need to check the circuit for a break with an ohmmeter. To do this, we place one of its probes on the speaker terminal, and the second on the connector terminal. If the device shows “1” or an infinity sign, then the integrity of the cable is compromised and it needs to be repaired.

Then you need to determine where the cable broke. You need to be especially attentive to places where there are kinks and frayed insulation. You can cut off the cable little by little and check where the break occurred; The headphones are torn, so the length of the headphones will be reduced, but this is a small price to pay for high-quality sound and no interference. Sometimes the situation requires a cable that is quite long: how to extend it - you need to take care of this. It is best to use a whole wire rather than using several pieces.

For reliable soldering, it is best to use POS-61 solder and tin the conductors with pine rosin. To tin wires with insulating varnish applied, you must first remove it. This is done using a small drywall knife or sandpaper.

All wire ends must be thoroughly stripped; It is best to strip the wires with a knife, cutting the insulation in a circle 1 cm from the end, and then remove it with one movement towards the end of the wire. The main thing when cutting the insulation is not to cut the wire core. It is best to cut wires with a length difference of at least 1 cm, so that the soldering points of adjacent wires do not converge at one point. This will prevent short circuit. For soldering, a soldering iron of 25 W or more is sufficient.

To properly solder the plug, it is recommended:

• clamp it in a vice attached to the table;
• hold the wire with one hand holding tweezers;
• use the second hand to perform soldering operations with a soldering iron.

When discussing how to solder a plug to headphones, it is impossible not to mention the importance of concentration and accuracy. Shaky hands, as well as poor eyesight, are factors that contribute to poor-quality soldering. The next step is to secure the wire

For this purpose, there is a clamp on the connector (where the background wire is soldered), an insulated wire is inserted into it and crimped using pliers

The next step is to secure the wire. For this purpose, there is a clamp on the connector (where the background wire is soldered), an insulated wire is inserted into it and crimped using pliers.

When soldering is done, you need to wait about 30 seconds, and then, holding the plug in one hand, make light swinging movements with the wire with the other hand. This way you can check the quality of the soldering, how well the wires are strengthened; Some headphones are secured with a clip to the collar of a shirt or one of the top buttons for reliability when moving.

Let's return to the question of how to fix headphones if the wire is broken: it is impossible to complete this procedure without a soldering iron. It is better that the sting is as small as possible, otherwise it will be difficult to control or sagging will form.

So, if your headphones are broken, don’t rush to buy new ones. Knowing how to solder headphones, you can save both your money and your nerves.

Soldering dishes or containers

Over time, metal utensils can rust. There is no need to rush to throw away a leaky pan; it should be sealed.

How to do this without a soldering iron? There is a simple way to do this. For the sting you will need a piece of metal strip 30-40 mm wide and no more than 1 mm thick. This is something that can be used instead of a soldering iron. You also need to prepare a piece of lead-tin alloy, flux and a blowtorch or gas torch. The work is carried out in several stages:

1. The metal strip is cut so that it is convenient to hold it with your hand. This side of the strip is wrapped with heat-resistant material.
2. The second end is cut in the shape of the letter V. It is sharpened with a file.
3. The pan is turned upside down. Some material with a metal plate is placed under it so that the metal fits tightly from below to the hole in the bottom.
4. Use sandpaper to clean the surface around the hole.
5. Solder is cut into pieces ø 3-5 mm.
6. Flux is applied to the cleaned surface.
7. Then pieces of solder are placed around the hole.
8. The working end of the strip is heated over an open fire.
9. A homemade soldering iron is used to tin the repaired area of ​​the bottom of the pan.
10. After cooling, the solder is polished with emery.

Note! For soldering dishes and various containers for preparing food, you need to use a food alloy, which consists of 90% tin. This metal is absolutely harmless to human health

Looking for the cause of the damage

Admit it, how often have you seen a headphone cable break right in the middle? The cause of the breakdown is almost always the plug, which, with regular use, is subjected to mechanical stress much more often than other elements of the headphones. Simply squeeze and tug the wire around the plug.

If the sound appears after this, it means that there really is a problem. We simply cut off the old plug - we won’t need it anymore. Although, if the distance between the break and the flexible part of the plug is about cm, there is a chance to use it if it is not possible to buy a spare plug.

In addition, to more accurately determine the location of the break, you can use the tester in resistance measurement mode (Ohm). Touch one end of the plug to any of the plug contacts (the left or right headphone output is the two outermost contacts), and attach a simple needle to the other probe with electrical tape and carefully insert it into the wire a little further from the intended break point. If the tester shows a value of 0 or slightly more than zero instead of 1 (a value with hundredths or tenths), then there is a break in this wire.

One earphone does not work: various reasons and how to fix the device

In addition to broken contacts on the headphones, other problems may arise, for example, the lack of the necessary drivers, a problem in the socket itself, or clogged contacts.

The malfunction of one earphone may also lie in a damaged membrane. You, of course, can try to bend it into place, however, you must understand that this phenomenon is temporary, and soon the device will completely fail without the possibility of repairing it. Fact! Poor hearing is more common with earbuds with silicone tips.

How to solder a wire to a headphone speaker

Let us now consider the situation if the wire breaks inside the speaker or not far from it. Carefully disassemble the headphones. After disassembling the headphones, you will see the usual standard set:

1. Speaker;
2. Wire coming from the second ear;
3. Two wires from the microphone;
4. The cord coming out of the headphones.

When disassembling the headphones, try not to tug at them too much, otherwise the wires may come off the board. In this case, you will have to find each wire its place.

1. Next, carefully inspect the headphones for dangling wires. Any dangling wires must be soldered back.

If the wire in the cable breaks somewhere at the base of the speakers, then it will be easier for us to cut it and resolder all the contacts again rather than resolder the wire at the break point. After disassembling the headphones, we proceed according to the following scheme.

If the design of the headphone body does not allow you to easily pull out the cable, then cut it off at the base. The rubber piece of the adapter can be left for strength.

2. Then we prepare the wire itself.

• We retreat approximately 2 cm from the end of the adapter and cut the cable.
• Now we take the end of the cord and cut off the top layer of insulation about 7-8 cm from it.
• After the top layer is removed, remove the inner one, being careful not to touch the wires.
• Now we clean and tin the ends of the wires.

Headphone cables

3. Then we insert the wires into the earphone and solder them one by one in place of the old wires (soldering each one in turn and replacing it with a new one).

4. After soldering all the wires, assemble the earphone in the opposite direction.

Turn it on and check it. If everything works, then good. If not, then disassemble the headphones again and look further - perhaps the contact in the cable has broken somewhere else, for example, on the section of the cable running from the right earphone to the left.

If the wire breaks inside the earphone

After disassembling the headphones, we carefully look at the disassembled earphone.