Users often experience a situation where their favorite Redmi Buds or AirDots suddenly stop working, play sound in only one ear or refuse to charge, which causes panic, because high-quality acoustics cost money, and service centers can request an amount exceeding the cost of a new device. However, in many cases, the problem lies not in a fatal breakdown, but in a software failure or contamination of contacts, which can be fixed on your own.
Before you carry a gadget into the workshop, you need to conduct a thorough diagnosis. Often the cause of failure is the discharge of one of the headphones due to oxidation of contacts or a malfunction of the pairing of the Bluetooth module. In this article, we will examine the algorithms of action from simple software resets to complex manipulations with a soldering iron that will help bring your technology back to life.
Recovery requires careful attention and a basic understanding of how electronics work, and we will look at the techniques that are relevant to most models of the Xiaomi Redmi and Mi True Wireless lineup.
Primary diagnosis and detection of malfunctions
The first step is always to make a thorough diagnosis. If the headphones don't turn on, check the charging case. The indicators on it should light up when you connect to the network. If there is no reaction, the problem may be in the cable or the power supply. Use another one. USB-cable and try connecting the case to a computer or other adapter to rule out power source malfunction.
Notice the LEDs inside the case or on the headphones themselves. Blinking in red often indicates a deep discharge, and constant burning indicates the charging process. If the indicator does not light up even after a long connection, contact areas may have oxidized, a common problem caused by moisture or sweat.
⚠️ Warning: If you notice a bloating battery in the case or the headphones themselves, stop charging immediately.Using the bloated batteries can cause a fire or chemical burn.
Sound check is also important. If one earphone is working and the other is silent, try playing the music and turning the volume down to a minimum, then smoothly increasing. Sometimes static noise or cracking at maximum volume indicates damage to the speaker, but a quiet sound can be a sign of software dissynchronization of channels.
Software reset and reconnection
Most of the problems with Xiaomi wireless headphones are solved by a complete Hard Reset, which removes all data about previous pairings and returns the device to factory parameters. To perform a reset, you usually need to put both headphones in the case and leave the lid open.
Find the touch zones on the headphones or the physical button on the case (depending on the model). You will need to hold them for 10-20 seconds. The exact sequence of actions should be specified in the instructions for a particular model, for example, Redmi Buds 3 Pro or AirDots 2. The indicator should start flashing white or orange, signaling the completion of the process.
☑️ Algorithm of resetting headphones
Once reset, you need to re-pair. Go to your Bluetooth settings on your smartphone, find a list of known devices, and select Forget Device or Unpair for your headphones. Only then start looking for a new device, a critical step that is often ignored when trying to connect to an old profile.
If the standard method doesn't work, try the alternative reset method that is common in some firmware versions, which is to remove the headphones from the case and simultaneously touch the touch areas for 5 seconds until the indicators flash red.
Resolving charging and contact problems
Lack of response to charging is one of the most common complaints, often the fault of contaminated contacts, during operation on metal earphones and inside the case, earwax, dust and oxides accumulate, which prevent the passage of current.
To clean, use a cotton swab dipped in isopropyl alcohol or a special electronics cleaner. Do not use water or aggressive solvents, as they can damage the plastic case or internal electronics. Gently wipe the contacts on the headphones and pins inside the case.
💡
Use an eraser to clean your contacts. A regular school eraser is great at removing oxides from metal sites without damaging them or leaving moisture.
If cleaning didn't help, maybe the problem is that the contacts inside the case are mechanically shifted, and over time, the spring mechanisms can become ineffective, so try to press the headphones in the case with your finger to make contact more tight, and see if the charging light light lights up.
In more complex cases, disassembly of the case may be necessary. This requires caution, since the case is often assembled on latches or glue. When opening, check the integrity of the wires going from the board to the battery and contact groups. Sprayed wire is a common cause of lack of charging.
Solving the problem of desynchronization (only one works)
When the headphones don't see each other and work as two separate mono-devices, it's called desynchronization, in which case the sound goes to only one channel, or the phone sees two devices with the same name, and the solution is forced pairing.
Place both earbuds in a case, close the lid and wait 10 seconds. Then pull them out at the same time. If that doesn't work, reset the previous section, but after flashing the indicators, don't rush to connect to the phone. Give the device 30-60 seconds to internal calibrate the link between the left and right channel.
| Symptoms. | Probable cause | Method of decision |
|---|---|---|
| Only one indicator is on. | Discharge of one of the modules | Long-term charging in the case (2-3 hours) |
| Phone sees 2 devices | Loss of ear connection | Hard Reset and Re-Pairing |
| One channel wheezing | Grid contamination or low charge | Cleaning the grid or fully charging |
| No sound on the bells. | HFP protocol error | Delete profile and reboot the phone |
Sometimes the problem lies in the smartphone itself. The Bluetooth cache may overflow or malfunction. Try clearing the Bluetooth cache in the app settings or resetting the network settings on the phone. This action will delete all stored Wi-Fi passwords and Bluetooth pairings, but often resolves hardware conflict.
Hardware repair: battery and speaker replacement
If software methods are powerless, you will have to switch to “heavy artillery.” Battery replacement is the most popular procedure, since lithium-ion batteries degrade over time. Xiaomi Redmi Buds usually use batteries of the size 401010 or 301010, but the exact size should be measured with stangenzinel.
Opening the earpiece requires heating the body with a hairdryer or carefully snapping the plastic with a thin blade. Be very careful: there is very little space inside, and the plumes of the speakers damage. Carefully unfurl the old battery and solder the new one while observing polarity. A mistake in polarity will instantly disable the board.
Where can I get the batteries to replace?
Replacement of the speaker is less often required, usually after moisture or mechanical impact. Finding the original speakers is difficult, so often use analogues from other Chinese headphones, suitable in size. It is important to keep the body tight when assembled using a thin layer of glue B-7000 or analog.
⚠️ Warning: When soldering, use a soldering iron with a thin sting and a temperature not higher than 300 degrees. Prolonged heating can melt the plastic body of the headphone or damage the sensitive speaker membrane.
Firmware and Update Through the App
Don’t forget the software. Xiaomi regularly releases updates for its accessories, bug fixes and noise reduction. Use the official Mi Home or Xiaomi Earbuds app (available on Google Play and App Store) to manage your headphones.
Connect your headphones to your smartphone and launch the app. If a new firmware version is available, the system will prompt you to install it. The upgrade process is critical: don't turn off your phone screen and keep the headphones close to the device. Interrupting the process can brick the device, and it will be extremely difficult to restore it.
💡
Regular update of firmware through the official application is the best prevention of software failures and channel desynchronization.
You can also set up touch controls in the app, and sometimes users accidentally change the settings to double-task the "Switch off the microphone" or "Activate the assistant" function, which can be perceived as a malfunction. Check the control settings in the app.
Prevention and proper care
So that the question of how to fix doesn't come up in the future, it's important to follow the rules of operation. The main reason for wireless failure is moisture and impact, and sweat that gets into the body during training causes contacts and boards to corrosion.
Regularly wipe your headphones with dry soft cloth. Don't leave your case in direct sunlight or in a cold car. Extreme temperatures are detrimental to lithium batteries. Also, try not to drop the case from a height, as the internal components are attached to the glue and can move away from the impact.
Keep the headphones dry. If they do get wet, don't try to charge them right away.Let them dry for 24-48 hours in a warm dry place, you can use silica gel bags.The use of a dryer is not recommended, as hot air can damage the adhesive joints.
💡
Use waterproof case covers. Silicone pads not only protect against scratches, but also provide additional protection against splashes and sweat.