Disassembling Xiaomi Bluetooth headset: safe dismantling for repair or cleaning

Xiaomi Bluetooth headsets are some of the most popular wireless headphones on the market due to the combination of price, sound quality and functionality. However, over time, even the most reliable models (Air 2 Pro, Buds 3 Pro, TWS 3 and others) may fail: they start to hold the charge poorly, the sound is distorted or the microphone stops working. In most cases, the problem is solved by cleaning the contacts or replacing the battery, but you need to carefully disassemble the body.

This article will help you disassemble a Xiaomi headset without damage, even if you have never done electronics repair before.

• 🔧 What tools are needed and where to get them
• 📲 Step-by-step analysis of different models (with photos and videos)
• ⚠️ Typical errors that lead to breakage of headphones
• 🔋 How to check and replace a battery or speaker

Important: Disassembly is not warranty, so first check whether your problem is covered by official service.

If you're willing to do it yourself, you can do it, but remember, 90 percent of the breakdowns in disassembly are due to the use of inappropriate tools or excessive effort when opening the case.

Training: tools and materials

You don't need professional devices to disassemble a Xiaomi headset, but you can't do without special tools. Here's the minimum set:

• 🔪 Plastic mediator (or guitar) to separate parts of the body. Metal blades scratch the plastic!
• 🔧 Set of screwdrivers (cross-haired) PH00 and flat 1.5 mm) - for screws inside headphones.
• 🧲 Magnetic mat or container – so as not to lose small parts (screws, springs).
• 🔥 Dryer or thermoair station - to soften the glue (not always necessary, but will help with models of Air 2) SE newer).
• 🧴 Isopropyl alcohol (90%+) — Cleaning contacts and removing glue residues.
• 📸 Smartphone with camera – take pictures of each step so you don’t confuse the order of the build.

Where to get the tools cheaply:

• 🛒 Kits for electronics repair on AliExpress (costs from 300) ₽).
• 🔧 In radio parts stores (for example, Chip and Deep»).
• 📱 In service centers – sometimes they are rented.

Do not use knives, scissors or screwdrivers not in size.

⚠️ Warning: If your headset is warranty, disassembly will void it. Check the deadline on the Mi Account website or in the check. For models older than 2 years (for example, AirDots 2019), the warranty is no longer valid.

Disassembly of the body: step-by-step instructions

The disassembly process depends on the model, but the overall scheme is the same for most people. TWS-Consider the universal method on the example of Xiaomi Air 2 Pro (similar to Buds 3, TWS 3 and others).

Step 1: Removal of silicone embushures

Carefully pull the earbuds off the headphone, often with screws or latches hidden underneath, and in some models (like the Redmi Buds 3 Lite), the earbuds are glued to the earbuds, and put it on a plastic mediator.

Step 2: Spinning the screws

Under the embushure you will see 2-4 screws (usually under a cross screwdriver). PH00). Unscrew them and fold them onto a magnetic mat. In Buds 3 Pro models, screws can be hidden under a sticker -- gently tuck it in with your nail.

Step 3: Separation of the hull

Put a plastic mediator in the seam between the front and back of the body. Carefully guide it around the perimeter, disengaging the latches. Don't force it -- if the body doesn't lend itself, there are hidden screws or glue.

For models with adhesive connection (for example, Air 2) SE) warm up the body with a hair dryer (temperature 60-80)°C) 2-3 minutes, then try again.

Step 4: Extracting the fee

Once the case is separated, you'll see a circuit board attached to the front. Gently unplug the plumes (if any) and remove the board. In touch-controlled models (like the Buds 3 Pro), the board can be glued -- use alcohol to dissolve the glue.

Step 5: Dismantling speaker and battery

The speaker is usually attached to latches or glue. The battery is soldered to the board - it will require a soldering iron with a thin sting (power no more than 30 watts). TWS 3 battery can be glued to the case - use a plastic blade for separation.

3. Typical Disassembly Problems and How to Avoid Them

Even with a careful disassembly, you can face unexpected complications, and here are the most common mistakes and ways to prevent them:

The most common mistake is to try to open the case with a knife. Metal scratches the plastic, and a sharp edge can damage the plumes or board. If the latches do not lend themselves, it is better to warm up the case and try again with a plastic tool.

Another problem is the loss of small parts. The screws in the Xiaomi Buds 3 Pro are only 2-3 mm long and easy to drop. Use a magnetic mat or sticky tape to fix the details.

⚠️ Note: The Xiaomi Air 2 Pro and later use ultrasonic welding to attach some elements. If you see the white dots on the body seam, these are weld marks.°C) or a special tool for boiling plastics.

Replacement of the battery: selection and installation

If the headset discharges quickly or doesn't hold the charge, the problem is most likely in the battery. TWS Lithium polymer batteries are used with a capacity of 40 to 60 mAh (depending on the model), you can replace them yourself, but there are nuances.

How to choose a battery:

• 📏 Size - must exactly match the original (measure with a barbell).
• 🔋 Capacity – take with a margin of 5-10% (for example, instead of 50 mAh take 55 mAh).
• 🔌 Connector type – Xiaomi uses batteries with soldered wires (red "+", black "–").
• 🏷️ Brand - better take it ATL Samsung SDI (They're wearing the original headphones).

Replacement process:

1. Solder off the old battery using a soldering iron with a solder suction. Be careful - lithium polymer batteries can ignite when overheated!
2. Clear the contacts on the board with alcohol.
3. Sell the new battery polarity-wise, multimeter voltage (should be 3.7-4.2 V).
4. Secure the battery with double-sided tape or a drop of glue B-7000.

After replacing the battery, be sure to calibrate:

1. Discharge the headphones to 0 percent.
2. Charge to 100% without interruption.
3. Repeat the cycle 2-3 times.

This will help the charge controller to correctly determine the capacity of the new battery.

💡

If the headphone doesn't turn on after the battery is replaced, check the fuse on the board (a small black chip next to the battery) and it can be replaced with a similar one or closed with thin wire (a temporary solution).

5. Contact cleansing and dynamics

If the sound is quieter or wheezing is happening, the problem may be the speaker's contamination or the contact oxidation, and you can clean without completely disassembling, but you have to get to the board for deep cleaning.

Contact cleanup:

• 🧴 Wet the cotton swab in isopropyl alcohol (90%+) and clean the contacts on the board and battery carefully.
• 🔍 For hard-to-reach places, use a toothpick wrapped in cotton.
• 💨 After cleaning, dry the board with a hair dryer (cold air) or leave for 10 minutes at room temperature.

Cleaning dynamics:

• 🎵 Remove the protective net from the speaker (it is glued or held on latches).
• 🧹 Remove dust with a soft brush or compressed air (a canister for cleaning equipment).
• 🚫 Do not use wet wipes or alcohol - this will damage the membrane of the speaker.

If the sound is not restored after cleaning, the problem may be in damage to the membrane or detachment of the speaker coil, in which case you will need a replacement speaker (it can be bought on AliExpress by model number, for example, XMAIR2PRO-DYN Air 2 Pro).

💡

Before cleaning the speaker, make sure to check if moisture has entered the body. If the headphones have fallen into water or been used during rain, first dry them in rice or silica gel for 24 hours.

Assembly and performance check

Getting your headset ready after repair is as important as disassembling it.

• 🔧 Twisting the screws cross-cross to avoid skewing the fee.
• 🔌 Before final assembly, check all connections with a multimeter: Dynamic resistance: 16-32 Ohms (depending on model). Battery voltage: 3.7-4.2 V.
• 🎧 After assembly, check: Sound in both headphones (whether there is any distortion), microphone operation (write down voice note), Bluetooth connection (whether there are any breaks).

If one of the headphones does not work after assembly:

1. Check if the plume is connected correctly (in models with a connector connection).
2. Make sure that the battery contacts are not closed.
3. Reboot the headset (for Xiaomi, you usually need to hold the button for 10-15 seconds).

Sealing tip: If the case is poorly held after disassembly, use double-sided tape 3M glue B-7000 Do not put glue on a board or speaker!

⚠️ Note: Xiaomi Buds 3 Pro and Air 3 models use the system ANC (After disassembly, the microphones may need to be calibrated via the Mi Home app (Hearphone settings section»).

7.Where to buy repair parts

Parts for Xiaomi TWS You can find it on different sites, but it's important to choose a reliable seller so you don't run into a fake:

When buying on AliExpress, pay attention to:

• 📦 Seller rating (must be above 95%).
• ⭐ Photo reviews – check that the spare part is suitable for your model.
• 📏 Sizes – Compare with the original part (use a ruler or a barbell).

If you are not sure about the choice, ask the seller with a photo of your part, for example: “Will this battery work for Xiaomi Air 2 Pro (photo attached)?”

FAQ: Frequent questions about Xiaomi disassembly TWS