Modern smartphones, including popular models of the budget segment from Xiaomi, require a special approach when carrying out service work. Model Redmi 8 has established itself as a reliable device with excellent autonomy, but over time, even the most durable gadget can require battery replacement or repair connectors. Understanding the design of the device is the first and most important step to successfully restore its operability without going to an expensive service center.
The process of dismantling components in this device is not trivial, since the manufacturer uses adhesive joints to fix the back cover, this is done to improve tightness and ergonomics, but significantly complicates access to the insides. Careful study of the sequence of actions will help to avoid accidental damage to the plumes and fragile elements of the body, which can occur when you mishandle the tool.
In this guide, we will take a detailed look at each stage of dismantling, paying special attention to the nuances that beginners often miss. You will learn what tools are necessary for work, how to safely unplug the back panel and how to properly unplug the plumes. A well-designed dismantling is a guarantee that after repair, the smartphone will look and work like a new one, without the creaking of the case or foreign gaps.
⚠️ Warning: Before starting any work, be sure to completely turn off the device. Attempting to disconnect the plume with the motherboard on is guaranteed to cause the power controller or backlight to burn.
Tools and workplace preparation required
For high-quality disassembly Xiaomi Redmi 8 is not enough just to have a knife or screwdriver at hand. Using the wrong tools can damage the screw thread or chips on the frame. Professional approach begins with the organization of space: the table should be well lit, and the surface – clean and antistatic, so that small parts are not lost and electronics are not affected by static discharge.
You'll need a specialized toolkit that you can buy in radio parts stores or order online. The basis of the kit will be precision screwdrivers of various sizes, as the design of the smartphone uses screws of different lengths and shapes of the hat. Also an indispensable assistant will be a plastic blade or mediator, which allows you to open the case without leaving scratches on glossy surfaces.
Special attention should be paid to heating equipment, the glue that fixes the back cover softens under the influence of temperature, which greatly facilitates the opening process. 80-90 degrees Celsius, exceeding this value can damage OLED-the matrix or cause the battery to bloat if it already has defects.
- 🛠️ Precision screwdrivers (cross-hatched) PH000, PH00 Torx T2, T5)
- 🔥 Hair dryer construction or special heating separator for softening glue
- 📱 Plastic blades, mediators and suction cup for neat opening of the body
- 🧲 Magnetic mat or organizer for sorting screws of different sizes
- 🧴 Isopropyl alcohol and thin line or string for cutting adhesive layer
Tool preparation takes no more than five minutes, but saves hours of nerves during the repair process. Make sure the screwdriver sting is exactly the size of the screw strand, otherwise you risk licking the edges, which will turn a simple operation into a difficult task to drill the fastener. Cleanliness and order in the workplace directly affect the speed and safety of the manipulations.
☑️ Checking readiness for repair
Removal of the back cover and primary access
The first step in dismantling the Redmi 8 is to dismantle the back glass panel, which is attached to a two-part glue around the perimeter, and is also held by screws hidden under the logo and at the bottom. SIM-cards and microSD, which will allow you to get additional leverage when opening and reduce internal pressure.
After the tray is removed, warm the perimeter of the back cover evenly with a hairdryer. 3-4 It's a little bit like this, but it's a little bit like this, and it's a little bit like this, and it's a little bit like this. 2-3 minutes), carefully tuck the edge with a spatula in the tray area SIM-the card or lower end, trying to create a minimum gap.
Insert a plastic card or a mediator into the gap, and as you make reciprocal movements, gradually cut the glue around the perimeter. Don't try to open the lid with a jerk or bend it too hard, because the glass can burst, and the internal plumes that go to the buttons or sensors can break. Patience is a key factor in success here.
⚠️ Attention: Do not insert a metal tool deep inside the body.In the area of the lower right corner (when viewed from the back) there is a plume of the fingerprint scanner, which is very easy to damage with the sharp edge of the blade.
Once the glue is cut through the entire perimeter, remove the back cover, and underneath it you will see a decorative plastic lining covering the bulk of the components, and the Xiaomi logo. Accessing the main nodes will require removing this lining, which often requires additional warming up, as it is also planted on the glue.
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Use a thin fishing line instead of a spatula for the first pass around the perimeter - it is guaranteed not to damage the plumes and better cuts old glue.
Dismantling of protective panels and disconnecting plumes
Once you remove the decorative pad, you'll see the interior architecture of the smartphone, and most of the components are covered with metal or plastic screens that are screwed with many screws of different calibers, and at this point, it's critical to be systematized: twist the screws in sequence and arrange them in the order in which they were removed.
The first thing you need to do is disconnect the main battery plume. It's the golden rule of any electronics repair: shutting down the device before turning off the other plumes prevents short circuits. The battery connector in Redmi 8 is located at the bottom of the board and can be closed with a separate metal plate on the screws.
Then you have to turn off the display, touchscreen and the main camera modules, which are fixed with clamping slats, which also require careful handling. Use a plastic blade to snap connectors, avoiding the use of excessive force that can break plastic latches or damage the paths on the board.
| Component | Location of the connector | Type of attachment | Features |
|---|---|---|---|
| Battery | The bottom of the fee | Push-bar | First turn it off! |
| Display. | Central zone | Metal screen | Wide plume |
| Cameras | Top of the pay | Plastic frame | Two connectors. |
| Imprint scanner. | Right end (inside) | Glue fixation | Very thin plume |
When removing metal screens, note that some screws may be hidden under stickers or warranty seals, their integrity is violated when self-repairing, which is worth considering if the device is warranty. Once all plumes are turned off, the motherboard becomes free for retrieval.
Replacement of the battery and lower board
The most common reason for dismantling Xiaomi Redmi 8 is to replace the battery, lost capacity, or repair the lower module with a charging connector. The battery in this model is glued to the frame quite firmly, and to extract it will require patience and chemical assistants. In any case, do not try to pick out the battery with a screwdriver - a puncture of the lithium polymer cell can cause ignition.
To safely extract, apply a little isopropyl alcohol or a special adhesive solvent under the edges of the battery. Wait 2-3 minutes for the liquid to penetrate the adhesive layer, and gently tweak the battery with a plastic card. Movements should be smooth, without sudden jerks. If the battery is swelled, handle it with extreme caution, without pressing on the center.
The lower board, where the USB Type-C connector is located, is attached with several screws and a plume. When replacing this module, it is important to check the status of the contact areas on the main plume from the motherboard. Often the problem of lack of charge is not the board itself, but the oxidation or tearing of this connecting element.
- 🔋 Recycle the old battery in special reception points, do not throw it in the trash can
- 🧹 Before installing a new battery, carefully clean the frame from the remnants of old glue with alcohol.
- 🔌 Check the density of the lower board connector before final assembly
- 🧪 Use it. B-7000 glue for fixing the new battery and body elements
Installing a new battery requires applying a new adhesive layer. Use double-sided tape or B-7000 liquid glue, spreading it in a thin layer around the bed perimeter. Once installed, let the glue grip for 10-15 minutes before final assembly of the case so that the battery does not shift.
⚠️ Attention: When working with glue B-7000 Avoid getting it on camera, speakers and connectors. Excess glue, squeezed out when pressed, can be removed with a cotton swab soaked in alcohol until completely dry.
Working with camera module and dynamics
The Redmi 8 is equipped with a modular camera system, which makes it easier to replace them in the event of mechanical damage or software failures. The main and front cameras are attached to special seats and are fixed with screws or pinch slats. When removing modules, it is important to hold on to their metal body without touching the lenses with your fingers, since fat spots can adversely affect the quality of the images.
The polyphonic speaker in this model is located in the lower end and is often combined with the vibrator in a single design or located next to it. To replace it, you need to completely remove the lower board and disconnect the contact patch that is pressed by the speaker body against the board. The contact group must be clean, without oxides, otherwise the sound will be quiet or hoarse.
When installing new modules, make sure that the sealing gums (if designed) are in their seats, which not only ensure tightness, but also the proper fit of the dynamic membrane, which affects the bass component of the sound. Incorrect installation can lead to rattling of the body when playing music at high volume.
Why can’t the camera focus after the replacement?
Assembly of the device and verification of functionality
The Xiaomi Redmi 8 is assembled in the exact opposite order. Before you twist the screws and stick the lid, you must perform an initial health check of all replaced nodes. Connect the battery, the display plume and try to turn the device on by pressing the power button.
Check the touchscreen, the speaker response, the vibration and, most importantly, the charging process. If all functions are working correctly, you can proceed to the final fixation of the components. Make sure that all the plumes are packed into their channels and not clamped, and the metal screens are in place, providing protection from interference.
To seal the case, use a new layer of glue or a special sealant for smartphones. Apply the composition evenly around the perimeter of the frame, avoiding getting inside the components. Press the back cover and lock it with rubber bands or load for 1-2 hours before the glue is completely dry, this will provide the proper level of protection from dust and moisture.
- ✅ Check the proximity sensor (approximation) during the call
- ✅ Make sure the volume and power buttons have a clear click.
- ✅ Test the operation of Wi-Fi and Bluetooth modules
- ✅ Check the absence of gaps between the screen and the frame around the perimeter
The final chord is to clean the body of fingers and glue residues. A well-assembled smartphone should not make squeaks when squeezed in the hand. If you followed the instructions, your Redmi 8 is ready for active use again.
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Quality assembly is more important than speed: do not rush to twist the screws until you make sure that all the plumes lie flat and nothing prevents the closure of the case.