Disassembling a smartphone is a process that requires not only technical skills, but also an understanding of the device of a particular gadget. Xiaomi Redmi 8 is popular for its balance between price and functionality, but like any electronic device, it can require repair or replacement of components. Most often, users face the need to reach internal nodes when a broken rear window or worn-out battery. Removing the lid is the first and most important step in the entire recovery process.
Many owners are afraid to start self-repairing for fear of damaging fragile plumes or breaking the seal of the case. However, if you act carefully and have the right toolkit at hand, the task becomes quite feasible even for a beginner. It is important to understand that the design of modern smartphones involves the use of adhesives to fix the panels, which requires patience and heat. Patience is the key word here, since rush often leads to breakdowns.
In this article, we will take a detailed look at all the steps of dismantling the back panel, paying special attention to safety measures and the nuances of working with adhesives. You will learn what tools are needed, how to properly warm the case and what to do if the lid does not lend itself. Proper preparation of the workplace and adherence to the sequence of actions will help you avoid common mistakes and successfully complete the work.
⚠️ Warning: Before starting any work, be sure to completely turn off the device. Attempting to disassemble the included smartphone can lead to a short circuit and failure of the motherboard.
Tools and workplace preparation required
The use of improvised tools such as knives or needles is highly undesirable, as they can damage internal components or leave scratches on the frame. For the Redmi 8, you will need a minimal but effective kit that will ensure the safety and convenience of the process. Preparation of the workplace also plays a critical role: the desk must be clean, well-lit and free of foreign objects.
Special attention should be paid to the heating source: the glue that glues the back cover softens at a temperature of about 80-90 degrees Celsius. Using an open fire or too powerful industrial hair dryers can lead to overheating of the display or deformation of the plastic elements of the case. The optimal choice is a household hair dryer with temperature adjustment or a special heating pad for phones.
To work, you will need the following tools:
- 🔧 Dryer or heat heater for heating the adhesive layer.
- 🎴 Plastic card or mediator for snapping latches.
- 🌀 Suction cup for careful pulling of the cover.
- 🔩 Set of screwdrivers (cross-haired) P2 and P00) screw.
- 🧴 Isopropyl alcohol or liquid B-7000 post-assembly.
Keep your eyes safe. When working with glue and small parts, there is a risk of particles or solvent spray. Work in a well-ventilated room, especially if you use chemicals to remove old glue. Organizing the space around you will not lose small screws that can easily roll under furniture.
☑️ Preparation for disassembly
The process of heating and separation of the rear panel
The most difficult step, which requires maximum concentration, is heating and primary separation of the cover. The rear panel of the Xiaomi Redmi 8 is attached around the perimeter to double-sided tape. To ease its adhesion, you need to warm the surface evenly. Don't hold the hair dryer at one point for too long, constantly move it, covering the entire area of the rear cover for 2-3 minutes.
After enough warming up, try to gently pull the suction cup upwards, creating a small gap between the frame and the lid. If the suction cup slides, rub the surface with alcohol or use tape for better grip. Once the minimum gap appears, insert a plastic mediator or a thin plastic card. Do not use metal at this stage, so as not to damage the internal plumes that pass close to the edges.
Move the mediator along the perimeter of the body, gradually cutting through the adhesive layer. The movements should be sliding, parallel to the plane of the phone. If you feel strong resistance, stop pulling and warm up the problem area again. Forced process can lead to cracks in the glass or, worse, damage to the display on the back side.
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Heat the phone evenly from all sides, paying special attention to the corners where the glue concentration is usually higher. You can check the temperature with the back of the palm - the body should be hot, but not burning.
Disabling the plumes and removing the protective plate
Once the lid has been successfully separated from the body, don't rush it off completely. At the bottom of the device, under the plastic protective plate, are the connectors of the main modules. This plate is secured by several screws that need to be twisted out with a cross screwdriver. Carefully avoid breaking the thread and losing small fasteners.
Under the plate, you'll see plumes of the display, the battery, and possibly the main camera module. Before you take the lid off, you need to turn off the battery plume. This is a critical step that will turn the device off and prevent accidental short circuits when working with other components. Use a plastic blade or nail to snap the connector.
Only after the battery is turned off can you gently remove the back cover to the side, now you have full access to the insides of your smartphone, if your goal was just to replace the battery, half the way is already gone, and if you need a deeper repair, make sure that all the screws are folded in a container with a magnet or placed in the order of their removal.
What to do if the battery plume does not turn off?
Table of the main components under the cover
You'll come across a lot of different details when you're going to take a look at them, and understanding their location and purpose will help you avoid confusion, and here's a table of the basic elements that become available after you remove the back cover and the safety bar.
| Component | Location. | Function | Features of dismantling |
|---|---|---|---|
| Battery | Central lower part | Powering the device | Fixed with glue, requires careful peeling |
| Maternity fee | Upper body | Managing all processes | A lot of small plumes, requires attention. |
| Camera module | Upper left/right corner | Photography | Fragile, afraid of dust on the lens |
| Dynamician | Lower end | Sound reproduction | Often has a rubber gasket for tightness |
Each of these elements requires a personalized approach. For example, when working with a motherboard, it is important not to damage the microscopic elements on its surface. The camera, in turn, is extremely sensitive to contamination - any speck of dust on the sensor will spoil the quality of the photos. So when removing these modules, try not to touch their working surfaces with your fingers.
Replace the battery and remove old glue
If the purpose of the disassembly was to replace the battery, then after turning off the plume, the old battery should be removed. In the Redmi 8, it is glued quite firmly. Do not try to undermine it with metal tools, especially in the central part where the battery itself is located.
Use special plastic cards or thin strings to separate the battery from the frame. You can pre-apply a little isopropyl alcohol under the edge of the battery (if the design allows), or slightly warm the back of the already removed lid to soften the glue. Act slowly, evenly spreading the force.
Once the old battery is removed, the seat must be cleared of the residue of old glue, which can be done with alcohol and soft cloth or plastic scraper, the surface must be clean and defatted before installing the new battery, and use special adhesive strips or double-sided electronics tape to fix the new battery.
⚠️ Warning: Never use superglue (cyanacrylate) to fix the battery. Its vapor can damage the electronics, and it becomes fragile and can crumble, damaging the battery when expanding.
Assembly of the device and check of performance
The final step is assembly. Set up a new battery (or an old one if you only changed the lid) and plug the plume in until you click the right click. Make sure the connector is up straight. Then you can temporarily (without screws) install the safety plate and check the phone's health. Press the power button. If the device is on and shows charging, you did the right thing.
Now you can start installing the back cover. Apply a new layer of glue (liquid B-7000 or special adhesive tapes around the perimeter). Spread the composition evenly in a thin layer, avoiding getting into the cameras and speakers. Combine the cover with the body, starting at the top, and press tightly around the perimeter.
For better adhesion, it is recommended to lock the phone with money bands or put under a small press (for example, a heavy book) on the phone. 1-2 Don't turn on the phone or load it at this time, and after the glue is dry, twist all the screws of the protective plate and put the tray in place. SIM-map.
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The quality of the assembly depends on the cleanliness of the surfaces and the time the glue is drying. Don't rush to remove the gums early.