A dirty USB connector leads to difficulties with charging - it does not work or goes very slowly. There are also problems connecting the smartphone to the computer for synchronization or data transfer. There are three ways to clean your phone's charging socket:
- A simple piece of paper;
- Using a fine needle brush;
- Medical alcohol;
- A cylinder of compressed air.
First we will work with a needle and brush, then we will look at other methods.
How to clean contacts from oxidation on your phone?
First, soak a cotton swab in alcohol. Then, to clean the contact, wipe it with a cotton swab dipped in alcohol. Also clean darkened contacts
You can use a regular eraser. Then wipe with alcohol.
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Features of cleaning the nest
Here we present the main commandment of doctors - do no harm. The micro-USB connector is thin and can be easily damaged by careless actions or a rough brush. Do not use thick needles, sandpaper, screwdrivers or power tools here. Only careful handling - as with a patient lying on a surgical table. Remember that damage to electrical contacts will require repairs at a service center.
The cleaning process comes down to three steps:
- The first is to remove large contaminants stuck in the nest.
- The second stage is to clean the connector with a brush.
- The third step removes oxide from the contacts.
Next, all you have to do is dry the phone and you can use it.
Aliexpress sells unusual protective accessories - plugs for connectors. They will prevent clogging of the sockets in the phone. Cost - within 80-100 rubles.
An effective way to clean the phone socket: step-by-step instructions
Find step-by-step instructions for cleaning the charging socket:
- The first stage is to inspect the connector and clean it with a thin needle. A regular sewing needle or a needle from a medical syringe will do (take a syringe of the smallest volume - for example, a tuberculin one). Simply blow the dirt to be removed onto the table;
- The second stage is fine cleaning with a brush. Its pile should penetrate into the nest, reaching the most secluded corners. Use your wife's or girlfriend's cosmetic brush, take an old toothbrush of medium hardness. Place the lint inside the connector and clean it. No hard brushes or sudden movements - spare your smartphone and your own money;
- The third stage is cleaning with alcohol or an alcohol-containing liquid, which helps to completely clean the electrical contacts.
As soon as the alcohol dries, carry out tests by connecting the cable to the charger.
Kontaktraininger
Those who do not know how to clean contacts from oxidation can be advised to opt for this professional cleaning product Liqui Moly from the German company Liqui Moly. The scope of application of this substance is automotive equipment and consumer electronics. The product is designed to clean dirty contacts, remove oxide film and reduce contact resistance. According to the manufacturer, the cleaner only needs 10 minutes. Judging by consumer reviews, this time may be longer. It all depends on the degree of pollution. The product is sold in 200 ml aerosol cans. To purchase Kontaktreininger, you will have to shell out 500 rubles.
Contact 60
If you don’t know which contact cleaner to choose, experts advise purchasing the Kontakt 60 brand. Among similar products, this cleaner, judging by numerous consumer reviews, is considered the most popular. It is designed to clean contacts and dissolve oxides. In addition, with the help of Kontakt 60, home craftsmen process electrical contacts of household appliances.
This product successfully cleans both old and worn out and contaminated contacts. In addition, it reduces the resistance at the junctions, which prevents the insulation coating from melting and improves the quality of power. In addition to battery terminals, this product is also used to treat switches, sockets, plugs, microcircuits, sockets, lamps, fuses, capacitors, etc. The product is sold in aerosol cans of 100, 200 and 400 ml. The price varies from 250 to 800 rubles. It is noteworthy that Kontakt 60 is exclusively a cleaning agent. If the contact connection requires additional protection, then you are better off buying the Kontakt 61 brand.
What to do?
First of all, you need to make sure that the terminals really need cleaning. To get to them, just cut off the pads. Then you need to unscrew and remove the battery. The terminals should remain in the saline solution for some time. To prepare it, use baking soda (a couple of spoons) and well-heated water. The more saturated the solution, the faster the chemical process will occur. In most cases (if the layer of white coating is not very thick), you can limit yourself to only washing the terminals in soda.
A little theory
According to science, the process of filling modern lithium-ion energy storage devices occurs in two stages:
- The power controller chip passes direct current until the terminal voltage is between 4.2 and 4.33 volts.
- When the calculated charge reaches approximately 85% of the full capacity, the current gradually decreases to 15-30 milliamps (at 97-100%), while the voltage is maintained at 4.2V.
What does the process look like in general?
The smartphone “understands” that it’s time to start charging when the output voltage reaches the critical limit of 3.5V-3.6V. This value corresponds to 0% on the indicator, in the usual “coordinates” in Android or iOS.
Main consumers in mobile technology
Now food for thought. A cell phone consists of many modules, but the main consumers in modern mobile phones are:
- Camera - up to 600 mA,
- Wi-Fi in network scanning mode and active data transfer - 100-300 mA,
- Processor under active load (in our example, the CPU is used to draw maps) - 100-300 milliamps,
- Display with maximum backlight level - 100-300 mAh,
- GPS chip in satellite search mode - 200-300 mA,
- Camera LED flash - 150-200 milliamps.
Taken together, this results in high energy consumption when actively using technology, for example, as a power-hungry navigator or video recorder in a car.
If you use a 1 amp charger or a heavily damaged USB cable, the battery will be discharged rather than charged.
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Troubleshooting the USB connector.
Lift the board so that you can reach the USB with pliers. Here our task is to squeeze the outer edges of the USB connector so that they fall into place.
Why use pliers? I tried with tweezers, but the force that needs to be created in order to squeeze the connector has to be applied too much - and this is dangerous because at the moment of compression we do not control our force and can pinch the edges. Then you will have to bend them, and this already risks the fact that you can completely bend and break the USB connector or tear it off from the board.
It is not necessary to compress the entire surface, but rather its middle
. If we squeeze over the entire surface, we will simply flatten the USB connector, and we don’t need that. Therefore, the process will be as follows: lightly squeeze both surfaces with the corner part of the pliers, and then check with the charging plug or cord. If the plug dangles, apply a little more pressure and check again.
The main thing here is not to overdo it
, so that you don’t have to bend everything back, so it’s better to do the whole process in several stages. The next photo is probably a little scary, but there were no small pliers, so I squeezed it as I did.
There is no need to do it very tightly either.
. Take your phone and check how hard the plug from the charger or USB cable fits into it.
When finished, reassemble everything in reverse order. You may have difficulty installing the flexible cord back. Everything is simple here. Insert the cable into the connector as far as it will go and use the tip of a screwdriver to press on the upper part of the latch.
In this article, I described only one way to fix a bad contact of the Micro-USB connector of a tablet computer . If you have other options or methods, I would be very grateful if you tell us about them, since there will already be several of them. You can also read the article about preventive repair of the USB connector of the Samsung Galaxy S3 phone. Good luck!
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134 comments
Good evening Julia! Glad you liked it. Thanks for leaving a comment!
Or you can change the connector yourself to another (same one) purchased on the Internet. Otherwise, the plate itself dangles in the connector
Thanks for the manual, I found what I was looking for. I’ll probably start with shamanism with the cord in the form of tightening the plate and protruding the clamps; if I don’t get by with this, I’ll have to disassemble my tablet. Already the fifth charge is dying(And the problem is not even in the tablet connector, but in using one charger for several gadgets... Some of them are always bending the charging connector...((
