The Xiaomi Mi 9T Pro, also known as the Redmi K20 Pro, has become a hit with its bezel-less screen and outgoing front camera. However, it is this design element – the motorized camera module – that makes the process of dismantling the device much more difficult than conventional monoblocks. Owners often face the need to replace a broken display or spent battery, but are afraid to damage fragile mechanisms.
Disassembling this machine requires not only accuracy, but also a specific set of tools, as well as understanding the sequence of actions. Any careless movement can lead to a break in the plumes or damage to the mechanism of the exit camera. In this article, we will look at each step in detail, from the preparation of the workplace to the final assembly, so that you can safely perform repairs at home.
Before you start physically affecting the body, you need to make sure you have sufficient skills with small electronics. Static electricity and excessive effort when peeling glass are the main enemies of the new master. Proper organization of the process will save you time and nerves, preventing the appearance of unnecessary parts after assembly.
Tools and workplace preparation required
Quality training is half the success of repairing complex electronics. To work with Xiaomi Mi 9T Pro you will need specialized tools, as a standard set of screwdrivers will not be enough.
You will definitely need a heating element to soften the glue. This can be a professional separator, thermoribbon or even a regular heating pad if there is nothing better at hand. The heating temperature of the back cover should be approximately 80-90 degrees Celsius, but keeping the device heated for longer than 10-15 minutes is not recommended to avoid bloating the battery.
- 🛠️ Precision screwdriver kit (cross-hatch) PH000, PH00 flat).
- 🔥 A hair dryer or heating panel to soften glue.
- 📏 Plastic mediators and suction cup for neat opening of the body.
- 🧲 Magnetic mat or organizer for sorting screws.
- 🧤 Dielectric gloves and antistatic bracelet.
Special attention should be paid to medical alcohol or special adhesive solvent (B-7000, T-7000). Without chemical action, it is almost impossible to remove the back window without chipping, since the factory adhesive over time polymerizes and becomes very rigid. Use a syringe or a thin needle to inject liquid under the glass around the perimeter.
⚠️ Warning: Never start picking glass with a screwdriver or knife immediately after heating. - Xiaomi Mi back cover glass 9T Pro is very thin and will burst from point pressure, even if it was heated.
Make sure your workplace is well lit. Small parts like motherboard mount screws or plume connectors require excellent visibility. If you have a magnifier or microscope, that's a big advantage when working with miniature connectors.
Removal of the back panel and primary access
The first step is always to remove the tray. SIM-This is a critical step that is often ignored, which causes damage to the case when you try to tamper with the glass. Once the tray is removed, you need to turn off the device even if the battery is completely discharged, which is a safety measure when working with power chains.
Heat the back of your smartphone evenly. Move the hair dryer throughout the back cover, lingering at the edges where the adhesive layer is located. The process can take 3 to 5 minutes depending on the power of the heating element. The glue in the area of the main camera module and in the lower part of the body often holds the strongest, so these areas need to be given special attention.
Use a suction cup, glue it to the bottom of the back cover, and create a little tension. Insert a plastic mediator into the gap. Don't try to open the body with one motion; it's better to slowly guide the mediator around the perimeter, gradually cutting through the adhesive layer.
⚠️ Warning: Be extremely careful in the top of the smartphone, where the mechanism of the exit camera. Excessive force or the mediator entering this area can irreversibly damage the gearbox motor.
Once the glue is cut all around the perimeter, remove the back cover, and you will see an interior space that is enclosed by a decorative plastic panel that holds the main camera modules and NFC-This panel is also glued and requires careful handling.
Dismantling of decorative panel and battery
The plastic cover that hides the insides is attached to a double-sided tape and a few screws, and first of all, you have to unscrew all the visible screws that hold this panel, and they're usually around. 10-12 They can vary in length, so use a magnetic mat to sort.
Once the screws are removed, the panel will still be held on the glue, carefully heat it with a hair dryer and, using a suction cup and a mediator, separate the plastic from the metal frame, and underneath this lid is the battery, the bottom board and the plumes that connect the components.
The next critical step is to shut down the battery. The battery plume in the Xiaomi Mi 9T Pro is located under a metal protective plate at the bottom. You'll have to remove another metallic lining by unscrewing several screws to access the connector.
☑️ Pre-switch check
Only after the battery is turned off can you safely continue to work, carefully bend the plume using a plastic blade, do not pull the connector itself, act on the edges of the connector, and then you can start removing the battery itself, which is also planted on the glue.
- 🔋 Carefully pull on special tongues (if any) to extract the battery.
- 🌡️ If there are no reeds, slightly warm up the battery area (do not overheat!).
- 💧 Use isopropyl alcohol to dissolve the glue under the battery.
- 🚫 It is strictly forbidden to pierce or bend a lithium polymer battery.
Removing the battery is one of the riskiest things, and if the battery is swelling, any manipulation of it is dangerous, and then you should be careful not to damage the cell shell.
Working with the mechanism of the exit camera
The Mi 9T Pro's unique feature is a mechanical selfie camera, which is located at the top of the body and requires a special approach when disassembling, which is mounted with multiple screws and connected to the motherboard with a thin plume.
Access to the motor mount often requires removing the top of the internal plastic bezels. Act slowly, as plastic frame latches can be brittle after prolonged use. The camera mechanism contains small gears that can pop out if handled carelessly.
| Component | Type of attachment | Risk of damage | Tool. |
|---|---|---|---|
| Reductor motor | Screws + plume | Tall (cogs) | Tweezers, screwdriver. |
| Camera plume | Connector clamp | Middle (break of tracks) | Plastic spatula |
| Guides | Grounding | Low. | Tweezers |
When removing the camera module, it is important to remember the position of the gears or to fix their position if you plan to disassemble the engine itself, but to replace the display or battery, it is usually enough to unscrew the fasteners and turn off the plume.