Xiaomi Poco X3 is a popular smartphone with excellent price-quality ratio, but even it is not immune to breakdowns. Disassembly of the device may be necessary to replace the battery, display, speaker or dust cleaning. However, the wrong actions can lead to damage to the plumes, rupture of flexible cables or loss of tightness. In this article, a step-by-step photo instruction, a list of necessary tools and unique recommendations for disassembly without damage.
Before you start, consider the Poco X3's adhesive body and brittle plumes. Even experienced craftsmen sometimes have problems with the first autopsy. If you've never disassembled a smartphone, practice on an old device or go to a service center. In this article, we'll look at three levels of disassembly: Removing the back cover, retrieving the battery, and dismantling the motherboard.
Preparation for disassembly: tools and security measures
You'll need specialized tools to disassemble the Poco X3, and using improvised tools (knives, screwdrivers of the wrong size) is almost guaranteed to cause scratches on the body or damage to the latches.
- 🔧 Plastic blades (2-3 (S) - for the removal of the lid without scratches
- 🔧 Tweezers with curved ends - for working with small plumes
- 🔧 The screwdriver (PH00 or PH0) — motherboard screw
- 🔧 Suction (optional) - helps to lift the cover after heating
- 🔧 Hair dryer or thermoplatform - for softening the glue (temperature) 60-80°C)
- 🔧 Isopropyl alcohol (90%+) — cleaner
- 🔧 Antistatic bracelet – protection against static electricity
If you don't have a thermoplatform, a normal dryer will do, but watch the temperature: overheating above 90°C can damage the battery or screen. Also prepare a clean workplace with good lighting - small screws and plumes are easily lost.
⚠️ Warning: Do not use metal tools to separate the lid! Even a gentle impact will leave microcracks on the aluminum frame, which then become hotbeds of corrosion.
Step 1: Removal of the back cover – heating and separation technique
The back cover of the Poco X3 is glued around the perimeter and is held on plastic latches. The main mistake of beginners is trying to tamper with it without first heating. The glue becomes brittle in the cold and breaks with the latches.
- Turn off your smartphone and remove it. SIM-map.
- Heat the body with a hairdryer around the perimeter for 2-3 minutes, keeping at a distance of 5-7 cm The temperature of the body should become warm (not hot!).
- Place the suction cup closer to the bottom edge (where the USB-C connector is) and pull up slightly.
- Insert a plastic blade into the resulting gap and carefully lead along the edge, separating the latches.
If the lid doesn't respond, heat it up again. Don't force it, the latches break at pressures of more than 2 kg. Be especially careful around the camera and the side buttons, where the plumes pass.
☑️ Check before removing the lid
After removing the cover, you will see:
- 🔋 Battery with connected connector
- 📱 Motherboard under metal screen
- 🔊 Dynamic and vibrator at the bottom
- 📷 Camera and fingerprint sensor plumes
⚠️ Note: Some modifications of Poco X3 NFC There's an extra layer of glue under the lid to protect you from moisture, so if the lid is removed tightly, don't pull it by force, warm it up again.
Step 2: Shutting down the battery – why it’s critical
Before touching the motherboard or plumes, be sure to turn off the battery.Even when off, the smartphone consumes current (for example, to power a real-time clock), and a short circuit can burn the charging controller.
The battery in the Poco X3 is glued, but the connector is easily accessible.
- Find the orange connector (usually signed BATTERY) on the motherboard.
- Carefully tuck it in with a plastic spatula, pulling it up. Don't use metal!
- After turning off, check the voltage on the contacts with a multimeter - it should be 0 V.
If the connector doesn't lend itself, don't force it. It might be glue-locked, drop some isopropyl alcohol and wait 10 seconds.
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If the smartphone accidentally switched on after the battery is turned off, this is a sign of a damaged power controller, in which case it is better to stop disassembling and contact the service.
Step 3: Removing the battery – how not to damage it
The battery in the Poco X3 is glued to the body with double-sided tape, and if you pull it by force, you can tear the shell or tear off the thermal sensor.
- Put a plastic shoulder blade on the battery from any angle.
- If it does not rise, warm the body with a hairdryer (not higher than 70 ° C!).
- Put a thin plastic card under the battery and slowly lead it along, cutting off the glue.
- After extraction, clean the body of glue residues with alcohol.
Do not use sharp objects (knives, scalpels) - they can puncture the battery. If the shell is damaged, immediately place it in a non-combustible container (for example, a metal jar) and do not use.
| Situation | Reason. | Decision |
|---|---|---|
| The battery is swelling. | Overheating or deep discharge | Dispose of it at a service center. |
| Clay's not going away. | Low temperature or old glue | Heat to 70°C, use alcohol |
| The battery won't shut down. | Oxidation of contacts or damage to the connector | Clean with alcohol, check with a multimeter |
Step 4: Dismantling the motherboard – working with screws and plumes
The Poco X3 motherboard is mounted on 12 different sized screws, remember the location of each one, if you mix it up, you can damage the board when you build it, and we recommend taking a picture of the board before you dismantle it, or using a circuit:
Procedure:
- Unscrew all screws (use a magnetic screwdriver to avoid losing them).
- Disconnect the plumes: 📷 Main camera. 📱 Display module 🔊 Dynamician and microphone 👆 The fingerprint sensor (if any)
Carefully raise the fee, starting at the top edge.
The plumes are fixed by latches. To disconnect them, lift a black plastic brace (don't pull the plume itself!) If the plume is broken, it can be replaced, but it requires soldering.
What to do if the screw breaks?
Step 5: Disassemble the display module – when necessary
Poco display X3 It consists of several layers: glass, sensor, OLED-If the screen is cracked, but there is an image, just change the glass. If the image is missing, the problem is in the plume or matrix.
To remove the display:
- Heat the body with a hairdryer (especially at the edges of the screen).
- Subdue the screen with a plastic spatula, starting at the bottom edge.
- Disconnect the display and sensor plume (they are usually glued together).
If after the assembly of the smartphone does not turn on, check:
- Is the battery on?
- Are the plumes damaged (visually and multimeterly).
- Whether all screws are twisted (a missing screw may cause a short circuit).
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The most common cause of failure after disassembly is damage to the plume of the display or battery. Always check their integrity before assembly!