How to disassemble Xiaomi Buds 4 Pro: a complete guide with photos and tips

Why should you take down Xiaomi Buds 4 Pro?

Xiaomi Buds 4 Pro is the flagship model with active noise cancellation, adaptive sound and IP54 protection, but even these are not immune to breakdowns. Most often users face pollution of speakers, mesh detachment or battery failure after 1.5-2 years of use. Disassembly may be required to:

Cleaning internal components from dust and earwax, which accumulates despite IP54 protection;

Replace the battery (capacity drops after ~500 charging cycles)

repair touch control buttons that stop responding to touch

- restoration of contacts after falling or getting moisture (even with IP54, complete tightness is not guaranteed).

The manufacturer does not provide official service repairs for this model - only replacement under warranty. However, when it expires or mechanical damage (not covered by warranty), self-disassembly becomes the only economically viable solution. In Buds 4 Pro, 3M VHB glue is used to fix the body, which complicates the process, but does not make it impossible.

Tools and materials: what you need for disassembly

For careful disassembly of Xiaomi Buds 4 Pro without damage to the body and internal components, prepare:

• 🔧 Plastic mediators or shoulder blades (thickness 0.1–0.2 mm) – for separation of glued parts.
• 🔥 Hair dryer construction or thermo-air station (temperature 60–80)°C) - for softening the glue.
• 🧲 Magnetic screwdriver. T3 and T5 — screw-off.
• 📦 Tweezers with thin ends - for extracting plumes and small details.
• 🧴 Isopropyl alcohol (90%+) — Removing glue residues and cleaning contacts.
• 🔋 Multimeter – to check the battery and chains (optional).

⚠️ Warning: Do not use metal shoulder blades - they leave scratches on the glossy plastic of the case.°C: This can damage the lithium polymer battery or melt plastic guides inside the headphone.

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Before disassembling, take a photo of each stage on your phone – this will help you to properly assemble the headphones back, especially if you are doing electronics repair for the first time.

Preparation for disassembly: steps before starting work

Unpreparedness is the main cause of damage during disassembly. Follow this checklist to avoid typical errors:

Charge headphones to 30-50% (full charge is dangerous when heated) | Turn off Bluetooth and remove headphones from the case | Prepare the workplace: clean desk, good lighting | Check the tools for defects (blanked shoulder blades, chips on mediators) | Put on an antistatic bracelet or periodically touch a grounded object

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Pay special attention to the battery: if the headphones were completely discharged, let them stand for 10-15 minutes charging before disassembling. Lithium polymer batteries in a discharged state are more fragile and can deform when heated.

It is also recommended to mark the left and right headphones (for example, stickers) so as not to confuse them when Assembly – the internal components may look the same, but have different calibration microphones and speakers.

⚠️ Warning: If the headphones were in water or were subjected to severe humidity, dry them in rice or silica gel for at least 48 hours before disassembling. Otherwise, the risk of short circuits when heated with a hairdryer increases 3-4 times.

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

The case Xiaomi Buds 4 Pro consists of two parts glued around the perimeter. dismantling requires patience - haste will lead to chipped plastic or plumes.

Step 1: Heating the body

Turn on the dryer at minimum power (60-70 ° C) and evenly warm the headphone case for 1-2 minutes, holding it at a distance of 5-7 cm. Do not direct the air flow to one place - this can deform the plastic. The goal is to soften the glue, but not melt it completely.

Step 2: Separation of parts of the body

Insert a plastic mediator into the gap between the front and back of the housing (start at the bottom edge where the charging contacts are located). Carefully swipe the mediator around the perimeter, scrolling it slightly to separate the glued surfaces. If the housing does not respond, warm it up for another 30 seconds.

Step 3: Extract the internal components

After the separation of the body, you will see:

• 🔊 Dynamic (mounted on the front panel).
• 🔋 Battery (stick to the back cover).
• 📶 Board with antenna and touch buttons (connected by a plume to a speaker).

Disconnect the plumes by tweezing them carefully. Don't pull the wires, they're soldered to the board and can come off. If the plume doesn't respond, check if there's a latch on it (in Buds 4 Pro, it's on the main connector).

⚠️ Note: There is a microphone on the headphone board MEMS (Don't touch it with metal tools, static electricity can knock the microphone out of order.

Disassembly of the charging case: features and nuances

The case Xiaomi Buds 4 Pro is easier to understand than the headphones themselves, but has its pitfalls.

• 🔋 Battery capacity of 500 mAh.
• 📊 Charge control board with controller BQ25601.
• 🔌 Wireless charging connectors (if supported by your modification).

For the case-breaking:

1. Unscrew the 4 T3 screws on the back cover.
2. Carefully tuck the lid with a plastic spatula - it is held on the latches.
3. Disconnect the battery, pre-soldier or disconnecting its connector (depending on the revision of the case).

The most common problem in disassembling a case is the breaking of thin wires that go to the headphone charging contacts, which are soldered to the board and easily detached when handled carelessly, and if the wires are broken, they can be soldered back, but you need a soldering station with a thin sting (0.2-0.4 mm) and solder with flux.

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Common Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when disassembling Xiaomi Buds 4 Pro. Here are the most common of them and ways to prevent them:

Another critical mistake is ignoring contact checks after assembly. After battery replacement or cleaning, be sure to check the resistance of the chains with a multimeter (in vertebrae mode).

• 🔌 Contact charging on the headphone body.
• 📶 Antenna cable (thin wire from the board to the upper part of the body).
• 🔊 Seeding Dynamics Connections.

If the headphones don't turn on or are not case-specific, 90 percent of the time, the problem is poor contact. Take them apart again and check all the connections.

Assembly and testing after repair

The Xiaomi Buds 4 Pro should be assembled in reverse order, but with a few nuances in mind:

1. Applying new adhesive: Use 3M VHB (double-sided 0.2mm thick Scotch) or B-7000 glue. Apply it with a thin layer around the perimeter of the case, avoiding hitting the speaker or contacts.
2. Train check: Make sure all plumes are tightly inserted into the connectors. In Buds 4 Pro, the main plume has a latch that must click when closed.
3. Test before final assembly: Connect headphones to the case and check: 🔋 Charging (the indicator on the case should flash). 🎵 Sound (play the test track). 🎤 Microphones (use a voice assistant).

If everything works, gently compress the headphone case and leave it under the press (for example, in a clutch with soft sponges) for 10-15 minutes to grasp the glue. Full polymerization takes ~24 hours, so avoid active use of headphones during this period.

⚠️ Warning: After assembly, the active noise reduction function may disappear (ANC). This is due to a leakage breach in the hull. ANC, Check: Integrity of rubber pads around the speaker, density of front and rear body, presence of all screws (if any in your headphone revision).

FAQ: Answers to Frequent Questions