Smartphone Xiaomi Redmi 9T has proven itself as a reliable device with a powerful battery, but even the highest quality equipment over time requires maintenance. The need to disassemble the gadget can arise for various reasons: from the banal replacement of broken glass to more complex repair of the motherboard or cleaning speakers from dust.
The process of dismantling this device has its own peculiarities related to the design of the housing and the location of the plumes. Unlike some other models, here the back cover is glued around the perimeter, which requires careful heating and the use of special tools. Incorrect actions can lead to damage to the internal components, so it is important to prepare the workplace in advance and familiarize yourself with the sequence of operations.
In this article, we will take a closer look at each stage of disassembly, focusing on the nuances of turning off the plumes and working with the adhesive layer. You will learn what tools are necessary to safely open the Redmi 9T, how not to damage fragile connections and what to look for when you reassemble. A competent approach to repair will prolong the life of your device and restore its functionality.
Tools and workplace preparation required
Qualitative disassembly of any electronic device begins with the preparation of the right tools. To work with the Xiaomi Redmi 9T, you will need a set of precision screwdrivers, including the cross PH00 and PH0, as well as a flat screwdriver for neat tweaking of elements. Using a magnetic mat will help not lose small screws, which in different parts of the smartphone can differ in length and thread.
Special attention should be paid to tools for working with adhesive joints. Since the back panel is attached to double-sided tape, you need a thermophen or high-quality heating pad to uniformly warm the perimeter of the case. As auxiliary means, use plastic mediators, a sucker to lift the lid and tweezers with curved ends for manipulation in hard-to-reach places.
- 🛠️ Precision screwdriver set (PH00, PH0, Flat)
- 🔥 Thermophen or heating panel to soften glue
- 📱 Plastic blades and mediators for opening the body
- 🧲 Magnetic screw-sorting mat
- 🧤 Antistatic gloves and tweezers
Before starting work, be sure to turn off the smartphone and remove the tray for SIM-This will not only protect the device from short circuit, but also prevent accidental damage to the contacts when the body is bent. The workplace must be well lit and all tools are located in reach to minimize unnecessary movement.
⚠️ Warning: Never start disassembling if your smartphone battery is over 25% charged, battery damage during dismantling can cause fire or chemical burns.
Removing the back cover and protecting the internal components
The first step is to heat the back panel. Set the temperature of the thermophen in the range of 80-90 degrees Celsius and evenly warm the perimeter of the device for 2-3 minutes. Do not hold the hair dryer too close to the center of the body, so as not to damage the display matrix or internal plastic elements from overheating. Once warmed, the adhesive layer becomes elastic, which allows you to carefully separate the cover.
Using a suction cup, create a small gap between the back cover and the frame at the bottom of the smartphone. Insert a thin plastic mediator into the resulting gap and, as you slid along the perimeter, cut through the glue residue. Move slowly, controlling the depth of the instrument's immersion, so as not to touch the plumes that fit the camera modules and buttons.
Nuances of the glue layer
Once the lid is successfully removed, you will have access to the insides, but don't rush. Immediately notice the location of the screws that lock the protective bar. Xiaomi Redmi 9T uses a system of screws of different lengths, and their entanglement during assembly can lead to a breakout of the motherboard. It is recommended to immediately sort the fastener on the magnetic mat according to the mounting zones.
The next step is to turn off the battery, which is a critical step that cannot be ignored, because even after the smartphone is turned off, there may be residual voltage on the board, and disconnecting the battery plume will protect the electronics from surges in the manipulation of other connectors, such as the display or cameras.
Dismantling the protective bar and disconnecting the plumes
The protective bar covering the main connectors is mounted with several screws. Carefully unscrew them using a suitable sized screwdriver to avoid breaking the hats. Once the metal plate is removed, access to the main plumes: the display, the main and front cameras, and the charging connector is opened.
To turn off the plumes, use a plastic blade or a special tool to lift connectors. Metal objects such as needles or blades are better not to use, as careless movement can damage the contact areas on the board. The movement should be directed strictly upwards, without distortion, so as not to break the connector itself.
☑️ Check before charge is withdrawn
| Component | Location of the plume | Type of attachment | Features of withdrawal |
|---|---|---|---|
| Battery | Central part | Latcher. | First to turn off |
| Display. | Top of the pay | Tight landing | It requires care. |
| Main camera. | Next to the display | Latcher. | Fragile module |
| Charging plume | The bottom part | Latcher. | Going to the bottom board |
Once all communications are shut down, you can move to retrieve the motherboard, which is usually further fixed by perimeter screws and may have hidden attachments under the tray. SIM-It's a map or a volume button. 9T You also need to disconnect the antenna cable, which often passes through special slots in the case.
Replacement of the battery and work with the lower fee
The battery in Xiaomi Redmi 9T has a large capacity and occupies a significant part of the interior space. It is glued to the body on a powerful double-sided tape. To extract it without damage, it is recommended to use special hoods with suction cups or gently tweak the battery with a plastic card, preheating the rear part of the case (if the lid is already removed, you need to warm through the front panel with caution or use special adhesive solvents around the perimeter).
Never try to remove the battery by putting metal tools behind the center, which can cause lithium to puncture and ignite instantly. If the battery sits very tightly, it's better to use gradual loosening and heating than brute force. After extracting, degrease the seat with alcohol before installing the new cell.
The lower board, where the charging connector and microphone are located, connects to the motherboard with a main plume. When replacing this plume, it is important to properly fit it into the guide channels. Incorrect stacking can lead to overlay and break contacts with time. Also in this area there is a vibrator motor that is attached to glue or screws.
⚠️ Warning: When installing a new battery, make sure the connector is tightly latched. Poor contact can cause spontaneous reboots or device failure to turn on.
Removal of the display module and replacement of glass
Replacement of the display in the Redmi 9T is often required after falls. The screen here is mounted on a frame, and to replace it you need to unstick the old module. Heat the front panel to a temperature of about 70-80 degrees. Use a thin line or a special knife to cut the glue between the frame and the matrix.
Be extremely careful with OLED-(if applicable to a particular modification) or IPS-Any pressure in the center of the screen can cause spots or complete failure. When you move electronics to a new frame, carefully monitor the position of the speaker grid and light sensors.
When assembly, use a new adhesive layer (B-7000 or special stickers) to ensure tightness and reliable fixation. Old adhesive should be removed completely so that the new adhesion is maximum. Spread the thin layer of adhesive evenly around the perimeter and tightly press the module, fixing it with rubber bands for 15-20 minutes.
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Use rubber rings or stationery clamps (with a paper pad) to evenly press the screen against the frame during drying of the glue. This will prevent gaps.
Assembly of the device and verification of functionality
The assembly is done in reverse disassembly. Start by installing the motherboard and connecting all the plumes. Make sure each connector has issued a distinctive click when snapping. Lay the plumes flat, no cracks, and install metal safety strips in place, twisting all the screws.
Before the final sticking of the back cover, it is recommended to conduct an initial check. Connect the battery and temporarily press the display plume. Turn on the device and check the touchscreen, cameras, speakers, microphone and vibration motor. If all functions are working correctly, you can turn off the power and proceed to final sealing.
Apply a new adhesive layer to the frame of the case. Carefully combine the back cover, starting at the top, and progressively press it around the perimeter. Remove the excess glue if it came out before it froze. Leave the smartphone alone for a few hours for full polymerization of the adhesive.
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The key to successful assembly is to keep the pressure out, so if the part doesn't fit in, make sure you've forgotten to unscrew the screw or disconnect the plume.