Disassembly of the Xiaomi Redmi 8 smartphone can be required in various situations, from replacing broken glass to installing a new battery.This budget bestseller, despite the affordable price, hides a rather complex design inside, requiring careful approach during dismantling. Before you start active actions, you need to clearly understand that any violation of the seals or sloppy handling of components can lead to final failure of the device.
Unlike the flagship models, there's no moisture protection, but the glue that holds the back cover very tightly, and you'll need not only physical strength, but also patience to separate the elements of the case without chipping or cracking, and the main challenge at this point is to heat the adhesive layer around the perimeter without overheating the display module itself, which is also sensitive to high temperatures.
The process requires a specific set of tools that are rarely found in a typical home toolbox. Using inappropriate items such as knives or needles greatly increases the risk of damage to plumes or battery puncture. Next, we will look at each step of the procedure in detail to minimize the risks and successfully repair your gadget.
Tools and workplace preparation required
Quality preparation is half the success of any electronics repair. To safely disassemble the Redmi 8, you will need a specialized toolkit that provides access to all screws and latches. Lack of the right tool often leads to licking of screw hats or damage to the plastic elements of the case.
First of all, get a heating appliance, which can be a professional heating pad, a temperature-adjusted hair dryer, or, in extreme cases, a hot water heater, although the latter option is less effective for softening industrial glue, suction cups for lifting the lid and thin plastic mediators or blades for cutting the adhesive layer are also critical.
- 🔧 Set of screwdrivers: mandatory presence of a cross screwdriver PH000 and PH00, and a flat screwdriver for the snapping of plumes.
- 🔥 Heat source: dryer or heat heat heater for uniform heating of the perimeter of the rear panel.
- 🧲 Magnetic mat: will help not to lose tiny screws and systematize them in the stages of disassembly.
- 🧤 Antistatic gloves: protect internal components from static electricity and fingerprints.
Special attention should be paid to the organization of the workspace. The surface should be clean, dry and well lit. It is recommended to use a light background, which is clearly visible small parts and screws, which will prevent their accidental loss.
☑️ Preparation for disassembly
Removal of the back cover and primary access
The first step in the dismantling process is to remove the tray for SIM-This is a mandatory procedure, as trying to remove the lid with the tray installed can cause it to break or damage the internal mechanisms of the smartphone.
⚠️ Warning: Don't try to pull the back cover from the volume or power buttons, because there are plumes that are easily damaged. Start warming up and putting on the bottom or the ends opposite the connectors.
After removing the tray, warm the perimeter of the rear panel evenly.The temperature should not exceed 80-90 degrees Celsius, so as not to damage the display matrix on the back. Keep the hair dryer at a distance of 3-5 cm from the surface and move it around in a circle for 2-3 minutes until the plastic is warm to the touch.
When the glue is softened, use a suction cup to create a small gap between the lid and the frame. Insert a plastic mediator or blade into the resulting gap. Movements should be sliding, parallel to the plane of the smartphone to cut the adhesive layer, not break the plastic fixtures. Move slowly around the perimeter, periodically warming up the cooling areas.
Once the lid is removed around the perimeter, take it off completely.In some versions, additional elements or plumes may be glued to the lid, although in Redmi 8 the main electronics are on the lower board. Carefully raise the panel and check for connections before final removal.
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If the back cover cracks when removed, do not throw it away immediately. Large fragments can be temporarily fixed with transparent tape so that they do not interfere with further dismantling and do not hurt your hands.
Dismantling the lower board and battery
When you remove the back cover, you see the bottom of the smartphone, which is covered with a plastic decorative pad, and this pad is fixed by several screws that you need to unscrew, and underneath it, you can see the main charging socket, the speaker, and the bottom of the antenna.
To access the battery and the main board, you need to disconnect the plumes. The first thing you do is you turn off the plume that runs from the bottom board to the main board. To do this, gently lift the connector latch with a flat screwdriver or a nail, and then the plume will easily exit the connector. Never pull the plume itself, only the hard connector.
| Component | Firming | Tool. | Risks. |
|---|---|---|---|
| Lower fees | 4 screws + plume | Screwdriver PH00 | The gust of the plume |
| Battery | Glue + connector | Plastic card | Battery puncture |
| Dynamician | 2 screws + pinch | Screwdriver PH00 | Membrane loss |
| cable | Latcher. | Tweezers | Cable break |
The battery in Xiaomi Redmi 8 is attached to double-sided tape, which becomes very durable over time. Use a special adhesive solvent (such as B-7000 or isopropyl alcohol) to extract it, dropping a few drops under the edge of the battery, or use a thin line / plastic card.
If the battery is swollen, be especially careful not to squeeze it. After disconnecting the connector from the main board, carefully remove the battery, putting it on the bottom.
Removal of the display module and the main board
Dismounting the screen is the most risky step, as the matrix (easily) breaks. In the Redmi 8, the screen is glued to the frame, but often changes with the frame or requires careful peeling off. If your goal is to replace the display, it is easier to buy a module with a frame, which will simplify the assembly.
To remove the main board, you must first dismantle all remaining components that interfere with access: the vibrator, the front camera, the auditory speaker and the antenna module. The main board is fixed with perimeter screws and protected by metal screens, which also need to be removed.
When disconnecting the main board plumes, be very careful. They are very thin and fragile. Use dielectric tweezers to work in hard-to-reach areas. Before fully removing the board, make sure that all connectors, including the button plumes and notification indicator, are disconnected.
⚠️ Warning: Metal screens on the board may have hidden screws under the stickers. Carefully inspect the surface before attempting to remove protection to avoid damaging the contacts.
Once all the mounts are freed, the main board is carefully removed from the body. Notice the location of the rubber seals and guides, they must fall into place when they are reassembled. Losing even a small screw can lead to rattling of the body or short circuit.
Secrets of working with plumes
Replacement of connectors and minor repairs
A common reason for dismantling the Redmi 8 is to replace the bottom charging connector (sub-board), which often fails due to moisture or mechanical wear. This module is completely changed and inexpensive, making repairs cost-effective.
When installing a new connector, make sure that the contact pads on the plume and the board itself are clean. Contact oxidation is a common problem that can be eliminated with alcohol, but if the corrosion is deep, you will need to replace the plume, and in this operation, the plume that goes to the main board is often changed.
- 🔍 Check the status of the antenna contact: it must fit tightly to the board, otherwise there will be problems with the signal network.
- 🧹 Clean the dynamic speaker grid of dust using a soft brush to improve sound.
- 🔩 Check the thread in the screw holes: if it is ripped, the screw will not hold the board, which will lead to backlash.
If you change the connector, check the charging before the smartphone is fully assembled. Connect the cable and make sure the device responds to the connection and starts charging, which will avoid re-disassembly in the event of a new part failure.
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Replacing the bottom connector is the most common and simple operation when disassembling Redmi 8, available to beginners with the availability of basic tools.
Assembly of the device and verification of functionality
The assembly is done in reverse disassembly, but there are some nuances: first of all, you need to apply new glue or special adhesive tapes (B-7000, T-7000) to the frame before installing the back cover, the old glue will not ensure tightness and reliable fixation.
When you install the screws, keep the tightening moment in mind. Don't twist them to the point of force, the plastic of the Redmi 8 can crack. Just lock the screw, feel a slight stress. Pay special attention to the screws around the connectors, they are often of different lengths.
After assembly, turn on the device and conduct a full test of functionality: check the touchscreen in all zones, take a photo on the front and main cameras, check the sound in the speaker and through headphones, as well as the operation of Wi-Fi and mobile communication.