Xiaomi AirDots Headphone Disassembly 2 – Tools, Tips and Typical Errors

Why to Disassemble Xiaomi AirDots 2 and When It’s Justified

Xiaomi AirDots 2 wireless headphones (also known as Mi True Wireless Earbuds 2) have become one of the most popular headphones in the world. TWS-But like all technology, they don't last forever: over time, you might have problems charging, sounding, or connecting. Disassembling headphones isn't always a last resort, and sometimes the only way to get the device back on track without buying a new one.

The reasons for disassembling AirDots 2 can be from trivial cleaning of contacts to replacement of the battery or speaker, but it is important to understand that these headphones are not designed for self-repair — their body is glued together, and the internal components are miniature. One careless movement can lead to irreversible damage. So before you start to take tools, assess your strengths and risks.

In this article, we'll go through the whole process in detail, from tool preparation to headphone assembly back, and you'll learn what pitfalls can occur at each stage, and how to avoid them, and if you've never repaired electronics before, you might want to see a specialist.

Preparation: tools and materials for disassembly

To take the Xiaomi AirDots 2 apart with minimal risk, you'll need a special set of tools. A regular screwdriver won't help here, because the headphone case doesn't stick to the screws, but to the glue and the latches.

• 🔧 Plastic mediator or spatula (to carefully separate parts of the body). Metal tools can leave scratches!
• 🔥 Hair dryer or thermo-air station (for softening the glue) Optimal temperature is 60-80°C.
• 🧲 Magnetic screwdriver. T3 or T4 (If there are hidden screws in your model).
• 📦 Container for small parts (so as not to lose springs or seals).
• 🧴 Isopropyl alcohol 90%+ (Cleaning contacts and removing glue residues).
• 🔋 Multimeter (to check circuits and battery if you plan to repair).

We also recommend you stock up on double-sided tape or B-7000 glue for reverse assembly - the original glue loses its properties after disassembling. If you're disassembling headphones for the first time, practice on old or non-working devices to feel the force of pressing and the opening angle.

⚠️ Warning: Do not use a knife or sharp objects to open the case! even a small pressure can damage the PCB or speaker.

Step 1: Disassembly of the headphone body

So the hard part is opening the body, and the AirDots 2 body is made up of two parts that are glued together around the perimeter, and the main thing is to gently separate them without damaging the internal components.

1. Heat the body. Use a hair dryer at minimum power, evenly warming the earpiece for 1-2 minutes. The glue will become softer, and the risk of damage will decrease. Don't overheat - the plastic can deform!
2. Insert the mediator. Start at the bottom of the headphone (on the charging contacts side). Carefully insert the mediator into the slot and slowly lead along the body, disconnecting the latches.
3. Top cover separation. Once the mediator passes around the perimeter, the lid should separate. If you feel resistance, don't pull, then warm up the problem area again.

Inside, you'll see a circuit board, a speaker and a battery. Don't touch contacts with your bare hands -- static electricity can damage chips. Use an antistatic bracelet, or at least ground by touching a metal object.

Heated up the body with a hair dryer (60-80 ° C |)

Prepared a plastic mediator |

Turned off the headphone from the charging case |

Checked for hidden screws (if the model is modified)|

Put a soft fabric on the working surface-->

Critical: In some AirDots 2 batches, there may be a T3 screw hiding under the rubber button seal. If you don't notice it and try to open the case by force, the board will crack! Always inspect the earphone under a bright light before disassembling.

Step 2: Battery extraction and dynamics

After opening the case, you need to carefully remove the battery and speaker, the battery in AirDots 2 is soldered to the board, and the speaker is fixed with glue.

• 🔋 Battery: Seal it off with a thin stinging iron (no more than 30 watts of power). Preheat the contacts with a hairdryer, this will make it easier. Don't overheat the battery - it can swell!
• 🔊 Speaker: Put a plastic mediator on it, starting at the edge. The speaker is attached to double-sided tape, but sometimes the manufacturer adds a drop of glue.
• 🧩 Fee: Disconnect the plumes (if any) and carefully remove the board. Don't pull on the Wi-Fi antenna - it's fragile!

If you're looking at headphones to replace a battery, look at the labeling. The original batteries have capacity. ~40 mach and size 15×10×3 Substitutes shall be the same in size and voltage (3,7 V).

⚠️ Warning: If the battery is swelling, don't try to prick it or bend it! This can cause fire. Carefully remove it and dispose of it according to the rules for handling lithium-ion batteries.

Step 3: Diagnostics and repairs of internal components

Now that all the components are removed, we can start diagnosing. Most of the problems Xiaomi AirDots 2 is associated with four nodes: battery, speaker, charging contacts and control board.

1. Battery problems

Symptoms: the earphone discharges quickly, doesn't turn on, the case doesn't see it.

• 🔋 Check the voltage with a multimeter (should be) ~3.7-4.2 V. If less than 3 V, the battery is dead.
• 🔌 Look at the contacts on the board. Oxidation or cliffs require soldering.
• ♻️ Replace the battery with a new one. Use the original or proven analogues (e.g. 301230) 40mAh).

2. Sound problems

Symptoms: wheezing, lack of sound in one earpiece, distortions.

• 🔊 Check the integrity of the speaker. If the membrane is torn, just replace it.
• 🎛️ Look at the speakers on the board. They often oxidize or move away.
• 🔧 Re-silver the speaker if the contacts are gone. Use flux and thin solder.

💡

If the headphone doesn't turn on after the battery is replaced, check the polarity! On the AirDots 2 board, the plus contact is usually marked with a red circle or the letter "P".

3. Charging problems

Symptoms: Case doesn't charge the earphone, display flashes red.

• 🧹 Clean the contacts on the headphone and in the case with a cotton swab dipped in alcohol.
• 🔍 Check the spring contacts in the case - they can bend or oxidize.
• 🔧 If the problem is in the headphone board, check the charge circuit with a multimeter (resistance between contacts should be ~10-20 Om).

Step 4: Build the headphone back

Assembly is as important as disassembly, and it's important to keep it tight and connect all the components properly.

1. Install the speaker. Apply a thin layer of B-7000 glue to the speaker edge and press it against the body. Make sure it sits tightly, without skewing.
2. Connect the battery. Seal it to the board, keeping it polar. Check the multimeter voltage, it should be ~3.7 V.
3. Lay the board. Carefully place the board in the case without clamping the plumes. Make sure the Bluetooth antenna doesn't touch the metal parts.
4. Stick the body together. Put a thin layer of glue around the perimeter of the bottom of the body. Use clamps or rubber bands to keep the parts tightly attached to each other.

After assembly, allow the glue to dry for 1-2 hours. Do not turn on the earphone immediately - check first with a multimeter, if there are short circuits between the charging contacts and the body.

💡

The most common build error is compressing plumes or antennas, which causes communication to break or the earphone to be completely inoperable. Always check the space inside the case before final gluing!

Common Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when disassembling Xiaomi AirDots 2. Here are the most common problems and ways to prevent them:

• 🔥 If the dryer is too hot, the plastic will deform, and the body will not close tightly. Use a temperature of no more than 80.°C and heat evenly.
• 💥 It's a Bluetooth antenna that's glued to the board and it's easy to come off.
• 🔋 Short circuit of the battery, if soldering is mixed up "+" And the "-" can swell or ignite. Always check for polarity!
• 🧲 Loss of small parts. Contact springs or sealing rings are easily lost. Use a magnetic mat or container.
• 🎛️ It's a microphone damage, it's next to the speaker, and it's attached to the board with thin wires!

If you make a mistake, don't panic. For example, a torn antenna can be soldered back, and a deformed body can be straightened out by heating up with a hairdryer and pressing under the press, the main thing is not to try to "power" assembly if something goes wrong.

⚠️ Warning: If after repair, the earphone starts to warm or smell like a burn, turn it off immediately! This is a sign of a short circuit that could lead to a fire.

FAQ: Frequent questions about the dismantling of Xiaomi AirDots 2