How to Disassemble Xiaomi Headphones HD Pro without damage: detailed instructions with photos and nuances

Xiaomi headphones HD The Pro is a popular model with hybrid acoustics and active noise cancellation, but even these are not immune to breakdowns. Over time, you can have problems with the microphone, control buttons, battery or sound. Disassembling the device is the first step to diagnose or repair, but without design knowledge it is easy to damage fragile parts.

Many users are afraid to disassemble their headphones themselves for fear of breaking them permanently. However, with the right approach and the right tools, the process is no more difficult than replacing the battery in a smartphone. This article provides a step-by-step guide with a photo, a list of necessary tools and tips on how to avoid typical errors. We also tell you what parts most often fail and whether they can be replaced at home.

If you’ve never taken electronics apart, start by watching Xiaomi’s demo demo video reviews HD Pro on YouTube, which will help you visually assess the complexity of the task, and remember, the warranty on the device is canceled when you open the case yourself, so weigh the risks before you start working.

Preparation for disassembly: tools and security measures

Before you start, make sure you have everything you need: a plastic mediator or a spudger is the main tool, and you can't use metal screwdrivers or knives, because they will scratch the plastic and damage the internal components.

Here is a complete list of what you will need:

• 🔧 A set of plastic mediators (2-3 plentiful)
• 🔍 Loop or magnifying glass (for working with small details)
• 🧲 Magnetic mat or screw container (so as not to lose)
• 📸 Smartphone for photographing the process (useful when assembling)
• 🧴 Isopropyl alcohol (90%+) and cotton swabs to clean contacts
• 🔋 Fryer (if you need to warm up glue)

Important: work on a clean, well-lit surface.Inside Xiaomi headphones HD Pro is used glue based on thermoplastic - when heated to 60-70°It softens, which makes it easier to disassemble. 80°C can damage battery or speakers.

⚠️ Warning: Do not use a household hair dryer at maximum power — 60-70°C (hair drying mode) Keep your hair dryer at a distance. 10-15 cm from the body, evenly warming the seam in a circle.

Step 1: Removal of the mounting screws and access to the fasteners

Start by removing silicone earpieces (speakers overlays) that are mounted on an annular ledge and are usually removed effortlessly. Carefully pull the earpieces from edge to center, rotating the earpiece for even removable. If the overlay is glued (in some batches). HD Pro do so, slap the edge with a plastic mediator.

Under the hood you will see:

• 🔊 Metal grille speaker (do not touch it with sharp objects!)
• 🔧 Two or three screws under a cross screwdriver (usually Torx) T3 or Phillips 00)
• 📍 Model marking and production date (useful for ordering spare parts)

The screws in Xiaomi HD Pros are often lacquered to protect against corrosion. If the screwdriver slips, drop a little isopropyl alcohol on the screw head and wait 10 seconds - this will dissolve the varnish.

⚠️ Note: Some of the screws in HD Pros are different lengths! Remember where each screw was twisted, or fold them into separate containers marked "left earphone" and "right earphone".

Step 2: Separation of the headphone body

Once the screws are removed, you have to separate the front and back of the body, and they're glued around the perimeter, and there are two approaches.

1. Mechanical: gently insert a plastic mediator into the seam between the halves of the case and slowly lead it around, splitting the glue. Start from a place next to the control buttons - there is usually a wider seam.
2. Thermal: warm up the body with a hair dryer (as described above) and repeat the procedure with a mediator. The adhesive will become elastic, and the risk of damage to the body will decrease.

Critical moments:

• 🚫 Don’t press the mediator too hard – the plastic of the case is thin and can crack.
• 🔋 The battery is located at the bottom of the case. If you see bloating, don't continue disassembling).
• 🎛️ Inside, there's a flexible plume that connects the board to the control buttons. Don't pull the halves of the case too far apart.

If the body fails, check if all screws are twisted. - Xiaomi HD Pro sometimes hidden an extra screw under a serial number sticker (it is located on the inside of the headphone, next to the speaker).

Step 3: Fee extraction and dynamics

After the separation of the body, you will see the internal structure:

• 🔋 Battery (stick to the back cover)
• 📱 Printed circuit board with Bluetooth chip and control electronics
• 🔊 Dynamics (mounted on the front panel)
• 🎛️ Flexible control button plume

Procedure:

1. Disconnect the button plume from the board. It's attached with a miniature connector. FFC/FPC. Put a plastic blade on the side (do not pull the wires!).
2. Carefully unfurl the battery wires from the board (if soldered) or disconnect the connector (in new revisions). HD Pro is used connector).
3. Remove the board by pre-photographing the location of all wires and components.

⚠️ Attention: In Xiaomi HD Pro is a type battery 3.7V 85mAh If you see bloating or white plaque on your battery, don't touch it with your bare hands (chemical burn risk.

The speaker in this model is attached to three points:

1. Two screws on the sides (under the bar).
2. Glue around the perimeter of the hull.

To remove it, you just need to unscrew the screws and gently put a plastic blade on the speaker. Don't pull the membrane - it's very thin and easily torn!

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If the speaker is contaminated, clean it with a soft brush (for example, for drawing). Do not use compressed air - this can damage the membrane. To remove earwax from the grille, use a cotton swab dipped in isopropyl alcohol.

Step 4: Diagnostics and replacement of components

Now that all components are available, you can start diagnosing. Xiaomi's most common problems HD Pro and ways to eliminate them:

1. The microphone is not working.

Check it out.

• 🔍 Integrity of wires running from microphone to board.
• 🧲 Cleanliness of contacts on the board (clean with alcohol if necessary).
• 🎤 The microphone itself (usually located next to the buttons) ring it with a multimeter in diode check mode - resistance should be within the limits of the buttons. 1-10 kom.

If the microphone is defective, it can be replaced with a similar one (for example, from donor headphones or order on AliExpress by code). MIC-3216).

2. The button is not responding.

V HD Pros use tactile buttons with metal contacts, most often the problem is oxidation of contacts, clean them with a blower or alcohol. If the button is physically broken, you will need a soldering iron to replace it.

3. Weak sound or distortion

Check it out.

• 🔊 Dynamic membrane integrity (no breaks should be made).
• 🔌 Contacts between speaker and board (call the tester).
• 🔋 Voltage at the output of the amplifier (should be) ~3V at maximum volume).

If the speaker is damaged, it can be replaced with a similar impedance with parameters 32 Ohms, 10 mm diameter. ED-23146 Goertek GK3203>.

4. Quick discharge

Battery in HD Pro is designed for ~500 charge cycles. If the headphones last less than 2 hours, it's time to change it:

When soldering a new battery, observe polarity — "+", black — "-".

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Before replacing the battery, completely discharge it (leave the headphones on before turning off) and this will reduce the risk of short circuits when soldering.

Step 5: Building the headphones back

Assembly is as responsible as disassembly. Follow these rules:

1. Check that all contacts are clean and not oxidized.
2. Make sure the flexible button plume is inserted correctly into the connector (it should snap with a light click).
3. Stick the battery to a double-sided tape (for example, 3M 467) - this will prevent it from being displaced.
4. Before final assembly, check the performance: 🔊 Connect your headphones to your phone and check the sound. 🎤 Record a voice message for a microphone test. 🔋 Make sure the charging indicator is working.

When gluing the body, use glue B-7000 or similar (e.g, LOCTITE 401). Apply it in a thin layer around the perimeter of the back cover, avoiding hitting the speaker or board. After gluing, press the body with a strub or screed on the back cover. 10-15 minute.

⚠️ Warning: Don't turn on the headphones immediately after assembly! Let the glue dry during 1-2 Otherwise, the glue fumes could damage the speaker or the board.

If one of the buttons becomes less responsive after assembly, check if there is any glue on the mechanism, disassemble the earphone again if necessary and clean the button with alcohol.

Common Mistakes and How to Avoid Them

Even experienced masters sometimes make mistakes when disassembling Xiaomi HD Here are the most common of them and ways to prevent them:

1. Damage to the flexible plume

The control button plume is very fragile. Never pull it, just gently pull the connector on the side. If the plume breaks, it can be temporarily restored by soldering the wires directly to the board (but it requires soldering skills). SMD-component).

Battery overheating

When soldering a new battery, do not hold the soldering iron longer. 2-3 Use a soldering iron with no more power than one contact. 30 W and temperature 300-350°C. Use a heat-shrinking tube or tape to protect the board.

Incorrect installation of the bottles

If the earpiece is crooked, it will worsen the noise insulation and comfort. Before installation, squeeze the earpieces with your hands to make it take a natural shape, then put it on the earpiece, starting at the bottom edge.

4. Loss of screws

Screws in HD Pros are tiny and easily lost. Use a magnetic mat or a container with a lid. If the screw is lost, you can replace it with a similar one from a smartphone repair kit (for example, for example, the lid, M1.4×3 mm).

5. Short circuit.

When working with a board, always touch the metal case (for example, the PC system unit) before taking the components. This is to remove static electricity. If you are not sure about your soldering skills, you better contact the service center.

FAQ: Frequent questions about Xiaomi disassembly HD Pro