The situation when a couple TWS-One channel familiar to many owners of budget and medium-budget electronics suddenly falls silent, and most often the user encounters this morning, taking the gadget out of the case: the right or left module simply does not emit sound, although the indicator can burn. This doesn’t always mean a fatal break in the speaker; nine out of ten times the problem is channel desynchronization or a Bluetooth protocol software failure.
Before you bring a device to the service, it is worth conducting a deep diagnosis, because the reasons can be trivial. Sometimes it is the oxidized contact on the charging port, and in other cases, a firmware failure that causes the headphones to stop “hearing” each other. Understanding the nature of the malfunction will help save time and money, returning the full sound of your favorite model like Redmi Buds 3 or Mi True Wireless Earphones 2.
In this article, we will look at the recovery algorithms, ranging from simple cleaning of contacts to complex flashing through special utilities, ignoring the primary symptoms can lead to a deep discharge of the battery, after which it will be extremely difficult to reanimate the device.
Program failure and channel desynchronization
The most common reason for the silence of one of the headphones is the loss of communication between the left and right modules. TWS-One earpiece is the master of the smartphone, and the other is the plume that receives the wizard's data. If that chain breaks, the sound disappears.
This often happens if you take your headphones out of the case at different times, or if one of them is dead while the other is running. The smartphone operating system may continue to consider the device connected, although the actual audio stream is not transmitted, in which case a complete reset of the headset settings to factory settings helps.
⚠️ Warning: Before performing a reset, be sure to remove the old pairing in your phone's Bluetooth menu, otherwise the re-synchronization may not go through correctly.
The reset procedure usually looks the same for most Xiaomi models.You will need to place both headphones in a charging case, leave the lid open and pinch the touch zones or physical buttons on the module case (or on the case itself, depending on the model) for 10-15 seconds.
Why doesn't reset always help?
Problems with charging case and contacts
The second most common reason is the banal lack of charge in the silent earphone, which users often do not notice that one of the modules does not charge until they try to use it, which may be due to oxidized contact pads or contamination of magnetic docks in the case.
Mechanical contaminants, such as earwax or pile from a pocket, create an insulating layer several microns thick, enough to interrupt charging. Visually, a case can show that the earphone is inside (a red indicator is burning), but the battery is not being current due to poor contact.
To fix the problem, gently wipe the golden contacts on the legs of the headphones and inside the recesses of the case with a cotton swab slightly soaked in alcohol. Let the alcohol completely evaporate before placing the modules back.
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Use a dry toothbrush to clean hard-to-reach places in the charging case - bristles clean well the compressed dust from the bottom of the indentations.
It’s also worth checking if the headphones fit tightly with the contacts. In some models, such as the Mi True Wireless Earbuds Basic 2, the spring contacts can eventually become fused or oxidized, no longer reaching the court on the headphone.
Diagnostics of hardware faults of speakers
If the software reset and the contacts were not helpful, there is a high probability of physical failure, it can be a plume break, a speaker failure or, as happens most often in budget models, the unstick of the speaker membrane from the housing.
You can diagnose a speaker by carefully putting a low-frequency signal on it. If you hear wheezing, crackling, or no sound at maximum volume, it's likely that the diffuser is damaged or the coil is burned. In Xiaomi models, replacing speakers is often unprofitable due to the complexity of disassembling and adhesively connecting the cases.
Another common hardware problem is the failure of the charge controller inside the earphone itself, in which case the module may be powered from the mains (if you plug it into charging and turn it on), but once you turn off the charging cable, it immediately turns off, which means that the battery is not receiving power or the power chain is broken.
| Symptoms. | Probable cause | Difficulty of repair | Recommendation |
|---|---|---|---|
| The earpiece doesn't turn on at all. | Deep discharge or death of the AKB | Medium | Try to "swing" the current. |
| Quiet sound or wheezing | Grid pollution or speaker breakdown | Low/High | Cleaning or replacement |
| It only works from charging. | Charge circuit malfunction | Tall. | Rationing is required. |
| Can't see the other headphone. | Software or antenna failure | Low. | Resetting settings |
Specificity of Redmi and Mi models: features of firmware
Xiaomi’s ecosystem devices often have unique algorithms, such as AirDots 2, where one headphone automatically shuts down when the battery is low, but doesn’t turn back on even after charging without being completely reset.
For advanced users, it is possible to flash headphones through special utilities on PCs if the model supports this mode. However, for most users this is redundant. It is much more effective to update the firmware through the official Mi Wear or Xiaomi Earbuds app if one of the devices is still functional.
A firmware update often contains patches that fix connection stability. If you have at least one headphone, plug it into your phone, search the About section in the app and check for updates. Sometimes, after an update, the dead channel miraculously comes to life.
⚠️ Warning: Do not interrupt the firmware update process. If the headphone battery dies at this point or the phone loses connection, the device can turn into a brick".
The method of "swinging" a deeply discharged battery
Lithium polymer batteries in miniature headphones are extremely sensitive to deep discharge. If the device was discharged for several months, the voltage on the cell could fall below the threshold at which the standard charge controller in the case recognizes it as connected.
In this case, the case can't see the earpiece and doesn't apply current to it. To reanimate the battery, you need an external low-current power source. USB-the cable, stripping one end and gently (observing polarity!) 3.7-4.2 Volts directly to headphone contacts bypassing the case.
This method, known as "swinging," allows you to raise the voltage to a level where normal charging will start working again, but it requires skills with a multimeter and soldering iron, and without experience, it is better not to take risks, because short circuit lithium batteries can lead to its fire.
☑️ Deep discharge activities
When to contact the service or buy new
Repairs TWS-The cost of original components (especially batteries and speakers) combined with the complexity of disassembling adhesives can exceed the price of a new device. If the warranty period has expired and simple methods have not helped, it is easier to purchase a new pair.
However, if the headphones are expensive (the flagship models of Xiaomi) or are under warranty, contacting an authorized center is the only sure way.
In conclusion, most problems with a single Xiaomi headphone are solved during the cleaning and reconnection phase. Careful charging and regular prevention will allow your headset to last longer.
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90% of cases of “breakdown” of one headphone are solved by a complete cleaning of contacts and the procedure of resetting to factory settings.