Redmi series smartphones have long proven themselves as reliable devices, but even the highest quality equipment requires intervention over time. dismantling Xiaomi Redmi 8T may be required to replace broken glass, worn-out battery or clean the speaker from dust. Self-repair can significantly save on services of the service center, if you act carefully and consistently.
The process of dismantling this model has its own peculiarities related to the design of the case and the location of the plumes. Unlike flagship models, there is no moisture protection, but adhesive joints can be difficult. Before starting work, it is important to understand that breaking the seals in some regions can deprive you of a residual warranty, although this is rarely a problem for budget models.
Preparing the workplace is the foundation of a successful renovation, and you're going to need a clean surface with good lighting, where you don't get direct sunlight, which creates glare, and you don't have to ignore the need for an antistatic mat or even a simple fabric, so that the little screws don't get lost in the carpet pile.
Tools and workplace preparation required
The quality of the repairs you make depends on what you use, and the use of inappropriate tools often results in licking of screws or damage to plastic latches. For the Redmi 8T, you need a specific kit that you can build yourself or buy a ready-made kit.
- 🔧 Set of screwdrivers: mandatory presence of cross PH0 and PH00 hull-board.
- 🔥 Dryer or thermophen: Necessary for softening the adhesive layer under the back cover.
- 💳 Plastic card or mediator: for careful snapping of the case without scratches.
- 🧲 Magnetic mat: will help not to lose microscopic screws during operation.
Pay special attention to the heating element. Household hair dryer may not give enough temperature, so it is better to use a power-adjusted building hair dryer. The heating temperature should not exceed 80-90 ° C, so as not to damage the display matrix on the back side.
⚠️ Warning: Never heat your smartphone in a microwave or over an open fire, which will cause the battery to bloat and the electrolyte to burn.
Before starting the procedure, be sure to turn off the device. If the screen is broken and the touchscreen does not respond, press the power and volume button to force the work to be completed, or wait for the battery to fully discharge if possible.
Removal of the back cover and primary access
The first step is always to remove the back panel. In the Redmi 8T, it is mounted on a two-part glue and several plastic latches around the perimeter. The heat should be uniform, so drive a hair dryer throughout the lid area for 2-3 minutes.
After heating, insert a suction cup at the bottom of the case, just above the Xiaomi logo. Pull the suction cup up, creating a small gap, and into the resulting gap, gently insert a mediator or a thin plastic blade. Move the tool along the edges, trying not to plunge it deeper than 3-4 mm, so as not to touch the plumes.
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If the lid doesn't move away after heating, don't push hard. Add a little more heat, especially to the corner areas where the glue is usually the most.
Be very careful in the area of the camera module and the fingerprint scanner, which can be traced under the plumes that go to the motherboard, and a sharp jerking motion can break thin contacts, which will require soldering or replacing the entire plume.
Once all the latches are clicked, you can put the lid back down to a safe place, you can access the insides, but you don't have to rush to disassemble them any further, you first have to make sure that the device is completely cooled, and check that there's no visible damage to the components.
Dismantling the protective panel and disconnecting the plumes
Inside the case, there's a black plastic panel covering the battery and the motherboard, and it's fixed by a lot of screws of different sizes, and you have to remember or sketch them, because if you confuse the length, you can damage the internal components.
Use a PH00 magnetic screwdriver to unscrew the screws. Act gently, without excessive pressure. After removing all screws, carefully lift the panel starting at the bottom where the charging connector is located. It is important not to damage the antenna contacts, which are often pressed by screws to the body.
| Component | Type of screw | Number of | Location. |
|---|---|---|---|
| Protective panel. | Cross (black) | 12 pcs. | Perimeter of the charge |
| Lower fees | Cross (silver) | 2 pcs. | Dynamic area |
| AKB anchorage | Cross (black) | 1 pc. | Central part |
The next critical step is to turn off the plumes, so before you take off the board or the battery, you have to turn off the system, find the battery connector on the motherboard, and gently disconnect it with a plastic blade, and then you can touch the other display connectors and the touchscreen.
⚠️ Warning: The battery plume must be turned off first, and trying to disconnect other components under voltage may cause the circuit to short and the board to fail.
Use dielectric tools to work with connectors. Metal tweezers can accidentally close contacts on the board, which will lead to irreversible consequences. If the plume sits tight, swing it from side to side, but do not pull vertically up.
Replacement of the battery and work with the glue layer
The battery in the Redmi 8T has a capacity of 4000 mAh and is attached to double-sided tape. Over time, the glue dries up, but in new devices it holds the battery very tightly. Do not under any circumstances try to tamper with metal objects - a puncture of the cell will cause instant ignition.
For safe extraction, use a special suction hood or, in extreme cases, a thin line. Stretching the line after the battery and smoothly "saw" the adhesive layer, gradually moving to the top. This requires patience, but guarantees safety.
☑️ Check before installing a new battery
Before installing a new power supply, clean the seat of the old glue residue. Use isopropyl alcohol or a special cleaner. Apply a new double-sided tape or special glue B-7000 with a thin layer around the perimeter.
It is important not to confuse polarity when connecting, although the Xiaomi connector design usually eliminates such an error. Once connected, check the voltage on the board contacts if you have a multimeter. It should be in the range of 3.7-4.2 V.
Removal of the display module and touch screen
Replacing the screen is one of the most difficult operations. 8T used IPS-It's a matrix that sticks to a frame with glue, and if you change only the glass, you'll need a separator and a blade, but you'll often change the module at home.
To remove the module, first unscrew the screws that hold it around the perimeter of the frame. The number can vary depending on the revision of the board. After unscrewing, heat the front part with a hairdryer to soften the glue, and use suction cups to neatly separate.
When you transfer controls (auditory speaker, front camera, button plume) to a new module, be extremely careful. These components are very fragile. The hearing speaker often has a mesh that is easily damaged with tweezers.
What if the screen does not show the image?
Once you've installed the new module, take your time to stick it in, plug the plumes, turn on the phone, and check the touchscreen, the colors and the brightness, and make sure you're working, apply a new layer of glue around the perimeter of the frame, and press the module with a load for 15-20 minutes.
Assembly of the device and verification of functionality
The assembly is done in reverse order, but requires careful inspection of each step. Make sure all screws are twisted but not pulled. Excessive force can break the thread in the plastic housings, which will lead to backlashes.
Pay special attention to the stacking of the plumes. They must lie in their channels and not be bent. If the plume is clamped with the housing, this can cause the buttons or communication modules to fail after a while.
- 🔌 Connect the battery and check the response of the charge indicator.
- 📱 Turn on the device and check the sensor, speakers and microphone.
- 📡 Test Wi-Fi, Bluetooth and mobile network by inserting SIM-map.
- 📸 Take a few pictures on the front and main camera.
The final step is to install the back cover, apply a thin layer of B-7000 glue or use factory adhesive tape, press the lid tightly around the perimeter and lock the rubber rings for 30-40 minutes until drying out completely.
⚠️ Warning: Do not turn on the phone immediately after applying the glue if it hits the contacts. Let the device dry when off at least 1-2 hour.
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Quality assembly guarantees not only the appearance, but also the protection of internal components from dust and moisture, as well as the stable operation of antennas.