Full instructions: how to disassemble the phone Xiaomi Redmi Note 4X

Disassembly of the smartphone Xiaomi Redmi Note 4X may be required for various reasons: replacement of broken glass, installation of a new battery or repair of the charging connector. This device, built on the basis of the Snapdragon 625 processor, has proven to be a reliable device, but physical damage or wear of the battery over time makes interference with the hardware inevitable. Before starting work, it is important to understand that you act at your own risk, and any careless step can lead to the final failure of the gadget.

The dismantling process in this model is not the most complex in the industry, but requires accuracy and special tools. The body of the device is fastened by screws and adhesives, and the internal components are tightly pressed with a metal frame. Careful preparation of the workplace and the right choice of tools is the key to the successful completion of the operation. In this article, we will discuss each step in detail to minimize the risks of damage to fragile plumes and chips.

Special attention should be paid to the state of the battery before work. If you plan to change the battery due to its bloating, be extremely careful: a puncture of the body can lead to fire. For safe disassembly, you will need: a set of screwdrivers (cross PH000), a plastic shovel (mediator), a sucker and, preferably, a thermophen or a heating plate to soften the adhesive. The heating temperature of the back cover should not exceed 80-90 degrees Celsius, so as not to damage the display matrix on the back side.

Workplace preparation and necessary tools

The Xiaomi Redmi Note 4X’s high-quality disassembly begins long before the first screw. You need to organize a space with good lighting to see small details and not lose tiny cogs. It’s recommended to use a magnetic mat or cell container where you sort the fastener by disassembly stages. It’s easy to confuse screws of different lengths, and screwing a long screw into a short hole can break the motherboard and knock the phone out forever.

Heating is a critical preparation step. The glue that fixes the back cover hardens over time. Using a hair dryer allows you to evenly warm the perimeter of the body, making the glue plastic. Keep the flow of hot air at a distance of 3-5 cm from the surface, constantly moving the hair dryer so that you do not overheat one point. If there is no thermophen, you can use household tiles wrapped in foil, but controlling the temperature in this case is more difficult.

• 🛠️ A set of precision screwdrivers (mandatory availability) PH000 and PH00).
• 📱 Plastic blades and mediators for opening the body without scratches.
• 🌡️ Thermophen or heating pad for softening the adhesive layer.
• 🔍 Lupus or magnifying glass for working with small connectors.

⚠️ Warning: Do not use metal blades or knives to lick the lid. Metal can damage antenna inserts, scratch the frame or, worst of all, short the contacts of the battery if it breaks through.

Rear cover removal and frame removal

After the body perimeter is warmed, insert the suction cup into the bottom of the back panel, closer to the Mi logo, and slightly pull upwards, creating a gap. In the resulting gap, carefully insert a plastic mediator. Driving the tool along the faces, cutting the adhesive layer, but try not to plunge the shoulder blade deeper than 3-4 mm, so as not to touch the internal plumes that go from the side buttons to the board.

When the back cover is removed, you see a metal frame that is screwed with a lot of screws. The Redmi Note 4X uses a lot of fasteners of different lengths. Twisted all the visible screws around the perimeter and in the center. Pay special attention to the screws near the cameras and connectors — they can be hidden under stickers or plugs. Once the fastener is removed, the frame will also need to be tampered with a mediator, since it is held on the latches and glue res.

Removing the frame is a high-risk moment for plumes. Often the bottom of the frame is glued to the middle frame or has complex hooks. Act slowly, checking if the cables are tight. In some versions, the antenna wire can be laid under the frame, and a sharp jerk will cause it to come apart. The metal frame serves not only as a protection, but also as a shield against interference, so its integrity is important.

Disabling the plumes and retrieving the battery

The first thing you do, once you've accessed the motherboard, is to turn off the power. Find the battery connector and gently put it in a plastic blade. In the Xiaomi Redmi Note 4X, the battery connector is conveniently located, but requires precision: the force must be directed upwards, not sideways, so as not to break the seat on the board. The power outage will keep the device from short circuiting if further manipulations.

Then disconnect the main plumes: the display, the touchscreen and the subscreen buttons, which can be closed with metal clipping slats, unscrew the screws that fix these slats, and then turn off the cables. Remember the location of each connector or take a photo at each stage. The plumes are very thin and break at the slightest skew of tweezers.

Removing the battery is a patient task, and the battery is glued into the case with double-sided tape. Do not try to pull it over one edge or pierce it with a needle to make it easier to remove. Use a plastic card or a special hood. You can slightly warm the area under the battery (through the screen if it is still in place, or through the body) to soften the glue. Pull by special tongues if they are preserved, or gently blow the battery around the perimeter.

Replacement of the display and touch screen

If the purpose of disassembly is to replace the broken screen, then once the frame is removed and the plumes are turned off, the display module can be removed. In the Redmi Note 4X, the display is often changed to the frame assembly, which makes it easier to do. However, if you change only the glass or matrix separately, the process becomes jewelry. It requires the complete removal of the old glue and degreasing the surface of the new frame.

When installing a new module, make sure that the protective film from the adhesive layer is removed. The alignment should be perfect: a skew even half a millimeter will lead to a "step" or uneven fit, which can be re-unsticked. After installation, gently press the module around the perimeter, squeezing out air bubbles.

It's important to check the touchscreen before it's fully assembled. Put the plumes on, turn on the phone, and test for multi-touch and sensitivity. If everything works, you can start the final assembly. The quality of the display copy can be very different from the original: the colors can be paler, and the angle of view is narrow. Keep this in mind when buying spare parts.

⚠️ Warning: When installing a new screen, do not press hard on the front camera and sensors. Excessive pressure can damage the backlight plume or the matrix itself, leading to black spots or stripes.

Working with connectors and small components

A common problem with the Xiaomi Redmi Note 4X is the loose-knit Sub-board charging connector, which requires the motherboard to be completely dismantled to replace, as the connector is on the bottom board, which is connected to the main plume, which runs under the battery and other components, making it difficult to replace without being completely disassembled.

When working with small components, such as a vibrator or loudspeaker, use tweezers with curved ends. The speaker in this model is also glued, so it needs to be carefully pruned. When installing a new speaker, make sure that the contacts are tightly pressed against the response platforms on the board, otherwise the sound will be quiet or hoarse.

Making a motherboard requires attention to the screws. As mentioned earlier, they come in different lengths. Wrapping a long screw into a hole for a short one can damage the tracks on the board or even break through it. Use the sorting method by laying out the screws in the same order you twisted them.

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Use isopropyl alcohol to clean the plume contacts. If the phone has been in water or has been in use for a long time, the oxides on the contacts can cause malfunctions. Wipe the connectors with a soft brush soaked in alcohol and let them dry before assembly.

Final assembly and functional verification

The assembly is reversed. First, the motherboard is installed and the screws are fixed, then all the plumes are connected. Make sure that each connector is up before the click. Then the battery is stowed (if you changed) and glued. Only after checking all the connections can you install a metal frame and twist the screws.

The back cover is glued to a new layer of glue. The old glue is better removed completely so that the new adhesion is maximum. Apply a thin layer of special B-7000 glue or use pre-cut adhesive tapes around the perimeter. Press the cover with rubber harnesses or a load for 15-20 minutes for primary polymerization.

After assembly, turn on the device and perform a full test: check the sound, vibration, camera, Wi-Fi, Bluetooth and proximity sensor. If all functions are working properly, the Xiaomi Redmi Note 4X disassembly can be considered successful. Don’t rush to twist all the screws at once, you should first check the device in a partially assembled state.

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The success of repairs depends not only on the availability of spare parts, but also on the quality of preparation: warming up, the right tools and lack of haste are the main factors of success.

Frequently Asked Questions (FAQ)