Xiaomi Redmi 4X, despite its age, remains a popular device due to the reliability and availability of spare parts. Often owners face the need to replace a broken display, worn-out battery or faulty charging connector. Self-disassembly of the case allows you to save significantly on the services of service centers if you perform all the actions carefully and consistently.
The process of dismantling this gadget has its own unique features related to the location of the plumes and the attachment of components. Unlike more modern models, there is no waterproof glue around the perimeter, which facilitates access to the insides, but requires care when working with plastic latches. A properly selected toolkit and understanding of the logic of the assembly is the key to successful repair without damage.
Before you start, you need to make sure you're ready to take responsibility for the outcome. Static electricity and careless movement can permanently disable electronics. In this article, we'll look at each step in detail, focusing on removing the back cover without cracks and safely shutting down the battery plume.
Preparation of the workplace and tools
The quality of disassembly of any electronic device begins with the organization of space. You need a clean, well-lit table, which will not be foreign objects that can scratch the case or get lost. Small screws and parts are better immediately put in special organizers or magnetic mats, so as not to confuse them during assembly. Chaos on the table is the main cause of loss of small components and the appearance of unnecessary parts after repair.
To work with the Redmi 4X, you'll need the minimum toolkit you'll find in any radio shop.Don't try kitchen knives or thick screwdrivers, as they're guaranteed to damage plastic.A specialized opening tool is inexpensive, but saves the case from chipping.
- 🛠️ A set of precision screwdrivers (mandatory presence of cross-shaped) PH000 and PH00).
- 🔧 Plastic spatula (mediator) or thin metal scalpel (for neat tweaking).
- 💨 Hair dryer (construction or household) for heating glue, if it was used in previous repairs.
- 🧲 Magnetic mat or screw sorting containers.
Be careful of safety. Make sure that the smartphone is turned off before any manipulations are initiated. If the battery is swollen or has visible damage, you should work with it very carefully so as not to damage the shell or cause fire. Lithium polymer batteries are sensitive to punctures.
⚠️ Warning: Never use metal tools to snap plastic panels near the display - one awkward movement can crush the matrix.
Dismantling the back cover and SIM card
The first step is always to get the snails out. SIM-This is a critical step, because trying to remove the lid with the tray installed will cause it to break or damage the contacts inside the smartphone. Use a clip or a special needle by pressing into the hole on the end of the device. The tray should come out smoothly, without jerking.
The back cover of the Xiaomi Redmi 4X is made of metal and mounted on powerful plastic latches around the perimeter. Unlike many modern models, there is no glue holding the lid, so dryer heating is usually not required unless the phone has previously been opened. However, if the lid sits very tightly, you can slightly warm the edges to soften the plastic latches.
Start by putting the lid on the bottom of the case, closer to the charging socket, or at the top corner. Put the plastic blade in the gap between the frame and the lid and drive it along the edges, gradually snapping the locks. A characteristic click will signal the successful release of the next latch. Don't make excessive efforts to avoid breaking the plastic ears.
☑️ Check before removing the lid
Once all the latches around the perimeter are freed, the lid will easily be removed, and below that you will see a metal shielding plate covering most of the components, and at this point you will already see the screws that you will need to unscrew to continue accessing the motherboard.
Removal of metal screen and access to the board
And underneath the back, there's a big metal plate that acts as a screen and protects the components, and it's screwed with a lot of screws of different sizes and lengths, and it's important not to confuse them, because screwing a long screw into a short hole can damage the board or the body, and the screws are located around the perimeter of the plate and in the center.
Use a magnetic-tipped screwdriver to unscrew the screws and immediately fold them into a prepared container. Some screws may be hidden under stickers or warranty seals that you have to gently puncture or remove. Once all the screws are unscrewed, the plate will not be removed by itself - it is held on the plumes that go to the buttons and connectors.
| Type of screw | Location. | Number of | Features |
|---|---|---|---|
| Long. | Body angles | 4 pcs. | Structure the main structure |
| Medium. | Along the side faces | 6 pcs. | Fixing the frame |
| Short. | Central part | 3 pcs. | Keeping the connector protection |
| Micro. | Near the camera | 1 pc. | It requires care. |
Carefully lift the metal screen, starting at the bottom, where the plume of the on and volume button is located. Be careful: the plume is very thin and easily breaks when a sharp jerk. Raise the screen a few millimeters to access the connector.
Nuances of button plumes
Shutting down the battery and plumes
The most important step in disassembling is to turn off the power. While the battery is connected to the motherboard, any manipulation of other plumes carries the risk of short circuit. Find the battery connector, which is usually located in the upper or central part of the board, and gently disconnect it with a plastic blade.
Once you turn off the power, you can start to shut down the rest of the components. The display plume in the Redmi 4X is wide and fastened tightly enough. It's located next to the battery connector. To turn it off, use a plastic tool by putting the connector up from the bottom. You can't use metal tools here, because you can damage the contact pads on the board.
- 🔋 Disconnect the battery plume first.
- 📱 Carefully disable the wide plume of the display and touch screen.
- 📷 Remove the connectors of the main and front cameras.
- 📡 Turn off antenna contacts (often just pressed with metal).
You also need to disconnect the plume from the bottom board (where the charging connector and microphone are) to the main board. This plume runs under or along the battery. In some versions, it can be glued, so care is required. Disabling all the plumes frees the motherboard to be retrieved.
⚠️ Warning: When disabling the display plume, hold the screen with your finger so as not to create tension and damage the fragile tracks inside the plume.
Once all connections are disconnected, the motherboard becomes free, but it can still be held by screws at the top of the case or by a speaker. Check for additional fasteners before attempting to retrieve.
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Use tweezers with curved ends to grab plume connectors in hard-to-reach places, but don't squeeze them too hard to break the plastic.
Removal of the battery and replacement of components
In the Xiaomi Redmi 4X, the battery is glued to the body with double-sided tape. To replace it, you must first remove the battery itself, which often causes difficulties for beginners. Don't just try to pull the battery by the tongue if it is dead - you can tear the shell or damage the plume.
To safely extract, use a building hair dryer or a special heater. Heat the back of your smartphone (a metal cover if it's already removed, or heat through a frame if the battery's still inside, but it's harder) to 40-50 degrees. This will soften the adhesive layer. You can use a suction cup to lift the battery, and a plastic card to separate it from the case.
If you change other components, like the bottom board with the charging socket, it's easy enough to take it out after the plumes are turned off. Often, you change the microphone with the connector, because they can be soldered or tightly integrated into one assembly. Check the status of the contact areas on a new part.
The new battery is installed in reverse order. Be sure to apply a new layer of double-sided tape or B-7000 adhesive to keep the battery from dangling inside the case. Vibration when operating can damage the contacts if the battery is not fixed.
Assembly of the device and check of performance
The Redmi 4X is built in a very reverse sequence, so you can put all the components in place first, plug in the display, the cameras, the buttons, and then plug in the battery, and you can check the device immediately without screwing or closing the lid.
Press the switch. If your smartphone is on, check the touchscreen, sound, vibration and charging. Make sure the display has no artifacts or dead zones. If everything is working correctly, you can proceed to the final fixation. Turn off the battery again if you need to press the plumes with a metal plate.
Set up a metal screen and twist all the screws. Keep them in mind their length and location. Then snap the back cover, starting on one side and going around the perimeter until the characteristic click of all the locks. SIM-map.
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Final check of operability before full assembly of the case is a mandatory step, which will save time in case of detection of a malfunction.
Once fully assembled, wipe the fingerprint case and turn on the device for the final test. If you've changed the display, you may need to calibrate the sensor, which often happens automatically or through an engineering menu.