How to disassemble Xiaomi Mi Air 2 SE: detailed instructions with photos and tips

Why to Disassemble Mi Air 2 SE and What to Know Before Starting

Xiaomi Mi Air 2 SE wireless headphones are a popular model with good value for money, but like any appliance, they are not immune to breakdowns. Most often, users face battery discharge problems, a microphone malfunction or mechanical damage to the body. Disassembly may be necessary to clean contacts, replace the battery or repair the speaker - but this is a process that requires accuracy and preparation.

Before you start screwdriver, consider: Mi Air 2 SE are not designed for self-repair. Headphone case is glued, and internal components are miniature and fragile. Xiaomi official service refuses warranty service after self-disassembly — even if you do not break anything, the autopsy marks will be noticeable. If the headphones are still warranty, it is better to contact the service center. If the warranty is over or repair is urgent, we begin preparation.

In this article, you will find step-by-step instructions with photos, tool lists and critical warnings to help avoid common mistakes, and we will also tell you which parts can be replaced yourself and which ones are better left to the professionals.

What tools will be needed to disassemble

To disassemble the Mi Air 2 SE carefully, you will need a specialized set of tools. Don't try to do with improvised means - this is almost guaranteed to damage the body or internal components.

• 🔧 Plastic mediator or opener for smartphones (thickness 0.1-0.2 mm) – for separation of glued parts of the body.
• 🔨 Thin screwdriver with a cross-tipped tip (PH00 or PH0) — squirt.
• 🧲 Magnetic mat or container – so as not to lose small parts (screws, springs).
• 🔍 Lupe with backlight - the internal components of the headphones are tiny, without increasing them, they can easily be damaged.
• 🧴 Isopropyl alcohol (90%+) and cotton swabs - to clean contacts and remove glue residues.
• 🔥 Hair dryer or thermo-air station (optional) - to soften the glue if the body does not lend itself.

If you are planning a battery replacement or speaker, prepare:

• 🔋 New battery (capacity 55 mAh, model) BL-5B analogue).
• 🔊 Speaker (if you need a replacement, the original Mi Air 2 will do). SE speaker or compatible).
• 🧵 Thin bilateral scotch or glue B-7000 — fixing.

⚠️ Warning: Do not use metal tools to separate the body! even a small scratch on the plastic can break the tightness of the earphone and lead to moisture getting inside.

Step-by-step instructions: how to disassemble the headphone body

The disassembly process starts with the top of the body being separated from the bottom, and that's the hardest part -- if you're not careful, you can break the latches or break the plumes.

1. Step 1: Heat the body (optional). If the headphones are new or the glue has not lost strength, heat the body slightly with a hairdryer (temperature not higher than 60 ° C) for 1-2 minutes. This will soften the glue and facilitate separation. Don't overheat - the plastic can deform!
2. Step 2: Separate the body. Put a plastic mediator in the gap between the top and bottom of the body (start on the side opposite the button). Carefully drive the tool around the perimeter, gradually disconnecting the parts. If you feel resistance, do not push harder, but try to heat again.
3. Step 3: Remove the board. Once you separate the case, you'll see a circuit board glued to the bottom, and it's connected to the button and the microphone with thin wires -- don't pull for a fee! First, unplug the plumes (if there are any) or gently lift the board by putting it on the edges.

Inside the enclosure you will find:

• 🔋 Battery (stick to the bottom cover).
• 🔊 Dynamic (attached to the top of the).
• 📶 Bluetooth antenna (thin metal strip).
• 🎛️ Printed board with control chip and charging contacts.

Heat the body with a hair dryer (optional)

Prepare a plastic mediator

Separate the upper part of the body with neat movements

Remove the fee without damaging the plumes

Take a picture of the details before the disassembly-->

If you need to reach the battery or speaker, proceed extremely carefully:

• The battery is glued - put it with a plastic spatula and gently disconnect the contacts from the board.
• The speaker can be soldered or fixed with glue. If soldered, you will need a soldering iron with a thin sting (power no more than 20 watts).

⚠️ Warning: Don't touch battery contacts with metal tools - this can cause short circuit! Use plastic or wooden sticks.

What can be repaired on your own and what can’t

Not all Mi Air 2 SE breakdowns are repairable at home, and here is a list of typical problems and opportunities to fix them:

If the problem is related to a software failure (earphones do not connect, constantly reboot), try resetting them to factory settings:

1. Put the headphones in the case.
2. Press and hold the button on the case for 10 seconds until the indicator flashes red and white.
3. Take out the headphones and try to reconnect.

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If after disassembly one of the headphones stopped working, check the integrity of the Bluetooth antenna - it can come off with careless removal of the board.

Common Mistakes in Disassembly and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when repairing the Mi Air 2 SE. Here are the most common ones and ways to prevent them:

• 🔨 Broken latches of the case. Cause: metal tools or excessive force. Solution: heat the case and use only plastic pickups.
• 🔥 The cause: the board is pulled out abruptly. Solution: Before you remove the board, take a picture of the plumes and unplug them neatly.
• 🔋 Short circuit of the battery. Reason: touching the contacts with metal tools. Solution: use dielectric (plastic) tools.
• 🧲 Loss of small parts. Cause: no magnetic mat, solution: work on a light surface and use a magnifying glass.

Another common problem is that the headphones may not turn on after repair if:

• The fee is set curved and closes the contacts.
• The battery is connected with polarity violation.
• The speaker is not tightly pressed to the body (there will be wheezing or lack of bass).

⚠️ Warning: If the headphone doesn't charge after assembly, check the integrity of the spring contacts on the board. They often bend or fall off when disassembled sloppyly.

How to replace the battery in Mi Air 2 SE

The battery is the most common cause of malfunctions Mi Air 2 SE. Over time, it loses capacity, headphones discharge in 10-15 minutes or do not hold charge at all, Replacing the battery is one of the few operations that can be performed at home with patience and accuracy.

You'll need:

• New battery (capacity) 55 mAh, size 30×15×3,5 mm).
• Double-sided Scotch or B-7000 glue.
• Tweezers and a plastic spatula.

Step-by-step:

1. Disassemble the body (as described above) and reach the battery.
2. Carefully tuck the battery into a plastic spatula, which is glued but not soldered, and you just have to separate it from the body.
3. Disconnect the battery contacts from the board. They can be soldered or simply pressed with springs (depending on the headphone revision).
4. Install a new battery, making sure the polarity matches (plus to plus, minus to minus).
5. Secure the battery with double-sided tape or glue. Don't use superglue, it can damage the plastic!
6. Put the body back together.

After the battery is replaced, the headphones may not turn on immediately - give them 5-10 minutes to charge in the case.

• The polarity of the battery connection.
• Integrity of contacts on the board (sometimes they are oxidized).
• The density of the adjoining spring contacts in the case.

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Replacing the battery in the Mi Air 2 SE is possible without a soldering iron, if the contacts are not soldered, but simply pressed, the main thing is not to confuse the polarity and securely lock the new battery.

Cleaning contacts and restoring charging

If the headphones stop charging or the charge is jerking, the problem is often oxidized contacts, which can be due to moisture, dust or natural wear, and cleaning contacts is a simple procedure that often returns the headphones to work.

What you need:

• Isopropyl alcohol (90%+).
• Cotton swabs or microfiber wipe.
• Tooth cleaning (for hard-to-reach places).

Procedure:

1. Disassemble the headphone body (it is enough to remove the lower cover).
2. Drink a cotton swab with alcohol and gently wipe the contacts on the board and battery. Don't be afraid to overdo it - the alcohol quickly evaporates and leaves no trace.
3. To clean the spring contacts in the case, use a toothpick wrapped in cotton. Walk through all metal parts, including the Type-C connector.
4. Allow the parts to dry for 10-15 minutes before assembly.

If the oxidation is strong (green or black), you can use an eraser for mechanical cleaning, but be careful not to erase the spray from the contacts!

⚠️ Warning: Never use acetone, gasoline or other aggressive solvents to clean! They break down plastic and can damage electronic components.

When to contact the service

Not all Mi Air 2 SE breakdowns can be fixed at home, but here are some of the best ways to trust the professionals:

• 🔧 If you see chips, burnt tracks or fallen off elements on the board, self-repair is almost impossible - you need a soldering station and experience with the system. SMD-component.
• 🎛️ Bluetooth malfunction: If the headphones don't connect to the phone or permanently cut off communication, the problem may be an antenna or a chip.
• 🔊 The speaker breaks. The speaker changes are possible, but it requires a soldering iron and fine tuning. If you don't set it right, it will distort the sound.
• 💧 If the headphones get wet, they need to be disassembled, washed with alcohol and dried in a special chamber.

The cost of repair in the service depends on the breakdown:

• Replacement of the battery - from 800 to 1500 rubles.
• Repair of fees - from 1500 to 3000 rubles.
• Replacement of the speaker - from 1000 to 2000 rubles.
• Cleaning after moisture is ingested - from 500 to 1000 rubles.

If headphones are older than 2-3 years, it is sometimes cheaper to buy new ones, but the Mi Air 2 SE is still a popular model, and their repair is often justified.

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Check the reviews and reputation of the workshop before you go to the service. Some "services" simply resell used parts, passing them off as new ones.

FAQ: Answers to Frequent Questions