Smartphone Xiaomi Redmi Note 4X deservedly considered one of the most reliable devices of its time, but even the legendary reliability is not eternal. Sooner or later, the owner faces the need to open the case: whether it is a swollen battery, broken glass or just a desire to clean the speakers from dust. Self-disassembly device requires not only desire, but also a clear understanding of the sequence of actions, since the design of the gadget has its nuances.
Unlike many modern monoblocks, the dismantling process begins not with the screen unplugging, but with the back cover, which greatly simplifies access to the main components. However, rushing can damage the plumes or chipped plastic. In this article, we will discuss each step in detail so that you can safely diagnose or repair your smartphone.
Before you start, it is important to assess your strength and the availability of the necessary tool. Wrong actions can lead to final failure, so carefully study the theoretical part. We have prepared a detailed algorithm that will help avoid common mistakes when working with Chinese electronics.
Preparation of the workplace and tools
Xiaomi's high-quality disassembly is impossible without proper preparation.You don't need a professional service desk, but organizing a clean, well-lit space is critical.Small screws are easily lost on the carpet or rolled off the table, so make sure the surface is flat and has no pile.
The Redmi Note 4X will require a specific set of tools that you can buy from any radio parts store or marketplace, and the main tool will be a set of screwdrivers, which must necessarily contain a bit like Pentalobe (star) or Phillips #000, since the screws are very small.
- 🔧 Plastic blade or mediator for opening the body without damage.
- 🔥 A hair dryer or thermophene to soften the glue under the screen (if it is planned to be replaced).
- 🧲 Magnetic mat or screw sorting container.
- 🧤 Antistatic gloves to protect electronics from statics.
Pay special attention to safety. Lithium polymer batteries require caution: they can not be pierced or severely deformed. If you plan only to replace the battery, heating the case may not be necessary, but if the purpose is to replace the display, then warming up is mandatory.
Removal of the back cover and removal of the frame
The process of opening Xiaomi Redmi Note 4X It starts at the back, and unlike many flagships, the back cover is not stuck around the perimeter, but is held on the latches and a few screws. SIM-cards to provide air outlet and relieve stress from the structure.
In the lower part of the case, next to the charging connector, you'll find two screws that can be hidden under decorative plugs or can be seen immediately. Use a thin screwdriver to unscrew them, trying not to tear the thread. Once the screws are removed, you can proceed to gently crack the cover.
⚠️ Warning: Do not try to lid with a knife or a metal screwdriver with force. The plastic may crack, and the metal tool may damage the internal components or battery.
Use a suction cup or plastic spatula to create a small gap between the frame and the lid. Smoothly guide the tool along the perimeter, freeing plastic latches. Exercise special care in the area of the Home button and the fingerprint scanner, if installed, as thin plumes can go to them, although in this model the scanner is more often displayed on a separate board or integrated into the button plume.
Disabling the plumes and removing the protective plate
When you successfully remove the back cover, you'll see the inside of the smartphone, which is basically a battery, but at the top is a motherboard that's covered with a black plastic or metal plate, and this plate is attached with lots of small screws that you need to unscrew.
It's important to remember the location of each screw, because they can be of different lengths. Using a magnetic mat here would be a great solution. Once the shield is removed, you'll have access to the main connectors. First of all, you need to turn off the battery!
To do this, gently apply a plastic blade to the battery connector, and only after de-energization can the display, touchscreen and main camera module be disconnected, and the plumes are very fragile, and their damage will cause the corresponding nodes to fail.
☑️ Safe shutdown of plumes
Replacement of the battery and work with glue
In the Redmi Note 4X, the battery takes up a significant portion of the internal volume and is glued to the frame of the case. If your goal is to replace the battery, you can't just pull it out. The adhesive used by Xiaomi is strong enough to soften it, and it will require heating.
Use a dryer to warm up the back of your smartphone in the battery area. The temperature should not exceed 80-90 degrees so as not to damage other components. After warming up, you can use a plastic card or a special tool to separate the battery. Move the tool between the battery and the housing, trying not to damage the battery itself.
⚠️ Note: It is strictly forbidden to use sharp metal objects to smack the battery.Puncture of the battery can cause instant ignition or chemical burn.
After removing the old battery, clean the seat of glue residues. The new battery should also be equipped with double-sided tape for secure fixation. When installing the new battery, make sure that the connector sits tightly and until clicked.
How to properly dispose of an old battery?
Removal of display and touch screen
If the screen is broken or the sensor is not working, you need a deeper disassembly. The display module in the Xiaomi Redmi Note 4X is glued to a metal frame. To remove it, the frame must be removed from the body (after turning off all the plumes) and warm up the front part.
Heating is done evenly around the perimeter of the screen, and once the glue is softened, a thin string or a special knife is used to cut the adhesive layer, a process that requires high precision and experience, because there is a high risk of crushing the matrix or damaging the touchscreen even more.
When installing a new module, be sure to use a quality B-7000 adhesive or similar adhesive for electronics. Apply the adhesive with a thin strip, avoiding contact with the camera and speaker optics. Once assembled, the device takes time to polymerize the adhesive - usually 2 to 4 hours.
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Use rubber harnesses or special clamps to lock the screen during glue drying to ensure tight fit throughout the perimeter.
Table of the main screws and their location
When disassembling, it's easy to get confused about the number of fasteners. Below is a table that will help you systematize the process without losing anything. Note that screws can vary in length even within the same group of attachments.
| Location. | Type of screw | Number of | Tool. |
|---|---|---|---|
| Lower edge of the hull | Crusade (P2) | 2 pcs. | Phillips screwdriver |
| Protective charge (top) | Cross (micro) | 10-12 pcs. | Phillips screwdriver #000 |
| Battery anchorage | Adhesive tape | - | Fen/Plastic |
| Charging charge (bottom) | Cross (micro) | 2-3 pcs. | Phillips screwdriver #000 |
This chart covers the main fasteners you'll encounter, and remember that the timing of the tightening should be moderate: a twisted screw can burst the plastic, and an untwisted screw will lead to a backlash of parts.
Assembly and initial launch
The Xiaomi Redmi Note 4X is assembled in reverse order, but there is an important caveat: don't twist all the screws right to the end. First, make all the screws of the safety board, then check the connection of the plumes, and only then finally fix the design.
Before you install the back cover, make sure to check all systems are working, plug the battery, press the power button, and make sure the phone is responding, sound is working, vibration and sensor. If everything works, you can turn off the battery again, wipe the case from the fingerprints and snap the cover.
⚠️ Warning: If the phone doesn't turn on after assembly, don't panic. Often the problem is a poorly inserted connector of the display or battery. Disassemble the device again and reconnect the plumes.
The final step will be to check the tightness (although full moisture protection at home is difficult to achieve) and appearance. Make sure there are no gaps between the screen and the frame, and the back cover sits tight and does not creak.
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The main difficulty of disassembling the Redmi Note 4X is a lot of small screws and fragile plumes that require maximum accuracy when disconnecting.