Xiaomi Redmi 8T has proven to be a reliable device with excellent autonomy, but even the highest quality equipment over time requires maintenance. Most often users are faced with the need to replace a broken display or a worn-out battery that loses its capacity over time. Self-disassembly can save a significant amount of money if you have minimal electronics skills and the appropriate tool.
Before you start dismantling, it's important to understand that this model's case is glued. The back cover is glued onto double-sided tape around the perimeter, which requires care and patience when heating. Any careless movement can damage the glass or internal plumes, so prepare the workplace in advance. In this article, we'll take a closer look at each step to minimize the risks and successfully repair your gadget.
The process does not require unique engineering knowledge, but requires attention to the details of the design. Redmi 8T has a classic interior layout for the budget segment, where the main modules are located under a protective plate.
Preparation of the workplace and necessary tools
A good disassembly of a smartphone is impossible without the right tools. Using inappropriate items such as knives or pins often results in scratches on the frame and damage to the internal components. You will need a set of precision screwdrivers, which necessarily have cross bits of the size of the PH00 and PH000, as the screws in Xiaomi can vary in length and diameter.
You need a heat source to work with the adhesive layer. A household hair dryer won't work here because of the low flow temperature, so it's better to use a professional thermophen or, in extreme cases, a quality heating pad for the screens. Also, don't forget about the suction cup, a plastic spatula (mediator) and a thin metal scalpel for the initial grating of the lid.
- 🛠️ Set of screwdrivers with a magnetic holder and different bits.
- 🔥 Thermophen or heating plate for softening glue.
- 🧰 Plastic mediators and metal scalpel.
- 🧲 Magnetic screw-sorting mat.
⚠️ Warning: Before starting work, be sure to turn off the device and remove the tray SIM-Attempting to disassemble the machine on could short-circuit and cause the motherboard to fail.
Organize the space so that small details don't get lost. The screws in Xiaomi Redmi 8T have different lengths at different mounting points, and if you confuse their places when you build, you can damage the thread or break through the board with a long screw. It is recommended to use a magnetic mat with markings or take photos of each stage of the fastener unscrew.
Removal of the back cover and primary access
The most difficult step is often to carefully separate the rear window from the metal frame. The adhesive layer becomes very strong under the influence of time, so heating is a mandatory procedure. Turn on the thermophen at a temperature of about 80-90 degrees and evenly warm the perimeter of the device for 2-3 minutes, constantly moving the air flow so as not to overheat the display matrix on the back side.
Once heated, place the suction cup at the bottom of the back, closer to the logo, but not at the very edge. Pull the suction cup up, creating tension, and in the resulting gap, carefully insert a plastic mediator. Don't try to drive the tool deep at once, it is better to slowly drive it along the perimeter, periodically warming up the resistance sites.
What to do if the lid does not move?
Be very careful about the fingerprint scanner, which is built into the back cover, and it comes with a thin plume that is easy to tear when you jerk abruptly. Open the lid, don't throw it far, but first disconnect the connector of the scanner plume from the motherboard, if the design allows, or act extremely slowly.
Dismantling the protective plate and disconnecting the plumes
When you successfully remove the back panel, you will see an internal layout that is closed with a black plastic or metal plate, and this protection is fixed with many screws of different calibers that need to be twisted counterclockwise. The Redmi 8T may also have a sticker with warranty seals that overlaps some screws, they will have to be carefully cut with a scalpel.
When you remove the plate, don't be in a hurry to disconnect all the plumes immediately. The first thing you need to do is turn off the battery to turn off the device. This is a critical safety step to prevent contacts from accidentally closing when working with other components. Only after the battery is turned off can you safely work with the display and other modules.
☑️ Procedure for disconnecting plumes
To turn off the plumes, use a plastic blade or nail, it is better not to touch the connectors on the board with metal tools, so as not to leave microscopic scratches on the tracks. The connectors in modern smartphones are fragile enough, so you need to pull strictly upwards, without distortion. Pay attention to the location of the antenna contacts, which are often pressed by screws to the body.
Replacement of the battery and work with the battery
In the Xiaomi Redmi 8T, the battery takes up a significant portion of the internal volume and is glued to the frame with a special glue. To extract it, you will need to use the heating again, but through the hole that was released after removing the components, or gently tweak the battery with a plastic card. Never try to pull the battery behind the wires or bend it by force.
When working with lithium polymer power sources, there is a risk of damage. Puncture or severe deformation of the battery housing can lead to ignition or bloating. If you notice that an old battery is swelling, treat it with the utmost care, do not squeeze it and do not heat it to high temperatures.
| Parameter | Meaning | Note |
|---|---|---|
| Capacity | 5,000 mAh | Nominal capacity |
| Type | Li-Po | Lithium-polymer |
| Tension. | 3.85 In | Working voltage |
| Firming | Adhesive tape | It requires heating. |
The new battery is recommended to check the multimeter for voltage, it should be within normal limits. When installing a new battery, make sure that the contact area on the frame is cleared of the residue of old glue to ensure a tight fit and a good heat sink. It is better to fix the new battery on special adhesive strips (B-7000 or bilateral scotch), rather than on superglue.
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Use special pull-out strips (pull-tabs) if you have them on the factory battery. If you don't have them, gently drop some alcohol or isopropyl alcohol under the edge of the battery to dissolve the glue.
Replacement of the display module and touch screen
If the purpose of disassembly is to replace the broken screen, then after turning off the plumes, you need to remove the display module itself. In Xiaomi Redmi 8T, the screen can be framed or be a separate component glued into the case. Most often in budget models, the module changes completely assembled with the frame, which simplifies the process.
When you reglaze the glass or replace the matrix in the old frame, you need to thoroughly clean the glue residues. Use a special solvent and carefully scrape the residues with a spatula. The surface must be perfectly clean, otherwise the new module will lie unevenly, and there will be lights or "rainbow" around the edges.
- 🧹 Carefully clean the frame of old glue and dust.
- 🧪 Degrease the surface with an alcohol napkin.
- 🧪 Apply a new layer of glue B-7000 thin-layer.
- ⏱️ Let the glue dry. 1-2 minutes before pressing.
⚠️ Warning: Don't push too hard on the center of the screen when you install it. Point pressure can crush the matrix, and the display will appear black spots or stripes that will not disappear.
Assembly of the device and verification of functionality
And the way you build it is reversed, but with one important thing: don't twist all the screws right up to the end. First, make all the screws on the safety plate, then check the touchscreen and the images by turning on the device, and if everything works correctly, you can finally tighten the screws and glue the back cover.
To stick the back cover, apply a thin layer of glue around the perimeter or use a ready-made double-sided tape cut out into the shape. Press the lid evenly and lock the device with rubber bands 15-20 minutes before the initial grasp of the glue. Excess glue exposed outwards is easily removed with a napkin until it has frozen.
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A check of all functions (camera, sound, vibration, network) should be carried out before the final assembly of the housing to avoid re-disassembly.
Once you've finished building, turn on your smartphone and run a diagnostic. Check the sensor sensitivity on all the edges of the screen, the proximity sensor (the screen should go out when you talk) and charge. If you've changed the battery, let the device fully charge and discharge to calibrate the power controller.