How to open Xiaomi Poco X3: safe disassembly of the smartphone with your own hands

Xiaomi Poco X3 is a popular smartphone with excellent price/quality ratio, but even it is not immune to breakdowns. Battery replacement, screen repair or dust cleaning require a careful opening of the case. In this article, we will discuss in detail how to open the Poco X3 without damage, what tools you need and what to look for when disassembling.

It's important to understand that disassembling your smartphone is a security issue (if it's still valid), if you're not sure about your skills, you should contact a service center, but for those who are willing to take risks, our guide will help you avoid typical errors and keep the device working.

Preparation for disassembly: tools and security measures

Before you open the Xiaomi Poco X3, prepare everything you need. Without the right tools, you risk damaging plastic latches, plumes, or even the motherboard.

• 🔧 Plastic mediators (2-3 - for gently putting the lid on. Metal tools can leave scratches.
• 🔨 Screwdriver. T3 and T5 — Use magnetic nozzles to keep the small parts from being lost.
• 🧲 Suction cups will help you separate the back cover after warming up, even a glass suction cup will do.
• 🔥 Hair dryer or thermo-air station for softening the glue. Optimal temperature: 70-80°C.
• 📦 So the screw container -- so you don't confuse them when you build them. You can use a magnetic mat.

Also, prepare the workspace: it should be clean, well-lit and without static electricity. Use of an antistatic bracelet is mandatory if you plan to work with the motherboard - the discharge can damage the chips. Remember to take photos of each stage - this will simplify reverse assembly.

⚠️ Warning: Do not use a knife or other sharp objects to lash the lid.Even a little pressure can puncture the battery or damage the plumes.

Step 1: Removing the back cover

The back cover of the Poco X3 is glued to the body, so it needs to be warmed up. Turn the hair dryer on average power and evenly warm the edges of the smartphone for 2-3 minutes. Do not direct hot air to the screen or camera - this can damage the matrix or optics.

After warming up:

1. Suction cup fasten on the bottom of the cover (closer to the USB-C connector).
2. Pull it up carefully - a small gap should appear.
3. Insert a plastic mediator into the gap and slowly lead it around the perimeter, separating the lid.

If the lid doesn't lend itself, warm it up again. Don't put too much effort into it, because there may be fragile elements inside, like antenna contacts or a fingerprint scanner plume.

Step 2: Shutting off the battery

When you take the lid off, you'll see the battery covered in black film, and the first thing you need to do is unplug it from the motherboard.

1. Find the battery connector (usually located at the top of the board, under a metal screen).
2. Carefully put the connector on a plastic picker or tweezers. Don't use metal tools!
3. Make sure the contacts are not closed – touching other board elements can cause a short circuit.

If the battery is swelling, don't try to puncture it or bend it, it can lead to fire, in which case you should contact the service. Also pay attention to the NTC sensor, which is easy to tear off if you do not care.

⚠️ Warning: If after the battery is turned off, the smartphone accidentally turned on (for example, due to the closure of the power button), immediately disconnect the battery again!

Step 3: Removing the motherboard

The Poco X3 motherboard is mounted on multiple screws and hidden under a metal screen to extract it:

1. Unscrew all the screws around the board (usually 10-12 pieces). Remember which screws were where you were standing - they may differ in length!
2. Carefully raise the charge with a plastic mediator. Start with the USB-C connector side.
3. Disconnect all plumes: 📱 Screen plume (at the top of the board). 🔊 Dynamics and microphone plume. 📸 Camera plumes (there are two of them - the main and wide-angle modules).

The plumes are mounted on the latches, and you have to lift them up, and then you have to pull the plume out carefully. Don't pull the wires. If the latches break, you can lock them with tape when you reassemble them.

Step 4: Disassembly of additional modules

If you need to replace the screen, camera or speaker, after removing the motherboard, the process is simplified.

1. Warm up the display edge with a hairdryer (the temperature is the same - 70-80 ° C).
2. Subdue the screen with a plastic mediator, starting at the bottom edge.
3. Disconnect the touchscreen and display plume from the board.

To replace the charging connector or the power button, you'll need a soldering station -- these are soldered to the board -- and without soldering experience, you'd better trust the professionals.

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If you take off the screen, seal it with tape before warming up - this will prevent dust from entering between the layers of the display.

Common Mistakes and How to Avoid Them

Even experienced craftsmen sometimes make mistakes when disassembling the Poco X3, and here are the most common problems and ways to prevent them:

• 🔋 Battery damage -- don't push it or rot. If the battery is swelling, don't try to push it back.
• 🔌 Breaking the plumes -- always lift the latches before removing the plume. If the contacts are oxidized, clean them with alcohol.
• 🔧 Loss of screws - use a magnetic mat or container with cells. Screw screws and boards are often different!
• 📱 The antenna contacts are damaged, they're located on the edges of the board.

Another common mistake is the wrong build, for example, if you forget to plug in the fingerprint scanner plume, the sensor will stop working. Always check the photos taken before the disassembly.

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The most vulnerable part of the Poco X3 is the screen plume, which causes loss of image or touch control, and repairs cost 30-50% of the cost of the smartphone.

Build a smartphone: the reverse process

To assemble Xiaomi Poco X3 you need to reverse order, but with some nuances:

1. Make sure all plumes are tightly connected and the latches are closed.
2. Before installing the battery, check if it is not swelling or damage.
3. Screw the screws cross-curl to avoid skewed boards.
4. Stick the back cover to a double-sided tape (e.g. 3M 9448A) or a special glue B-7000.

After assembly, turn on the smartphone and check:

• 📶 Network operation (SIM-map, Wi-Fi, Bluetooth).
• 🔊 Sound in the speaker and microphone.
• 📸 Cameras (main and front).
• 🔋 Charging (connect the charger).

⚠️ Warning: If the phone doesn't turn on after assembly, check the battery connection and power buttons. Often the problem lies in incomplete contact of the board plume with the battery connector.

FAQ: Frequent questions about Poco X3 disassembly