Disassembly Xiaomi Mi 9T Pro: a complete guide with photos and nuances

Xiaomi Mi 9T The Pro is one of the brand's most popular smartphones, but even it's not immune to breakdowns. Disassembly of the device may be needed to replace the battery, display, speaker or dust cleaning. However, improper actions often lead to damage to the plumes, rupture of cables or loss of leakage. This article will help to avoid mistakes: here you will find a step-by-step instruction with a photo, a list of necessary tools, as well as critical nuances that are not written about in standard guides.

Model Mi 9T The Pro (codenamed raphael) has a unique design with a retractable front camera, making it difficult to disassemble, and unlike classic smartphones, it requires special care when working with the camera mechanism and flexible plumes. We will analyze the process from spinning screws to removing the motherboard, as well as give recommendations for reverse assembly and testing after repair.

Preparation for disassembly: tools and security measures

Before you start, make sure you have everything you need, and even one tool that you don't have can cause permanent damage, like trying to stick a knife in the back cover instead of a mediator is almost guaranteed to leave scratches or cracks.

Here is the minimum set that will be required:

• 🔧 Setting screwdrivers PH00 and Y00 (screw-size)
• 📱 Plastic mediators or shoulder blades (thickness 0.1–0.2 mm)
• 🔥 Hair dryer or thermo-air station (for softening glue)
• 🧲 Suction cup for removing the display (diameter 5-7 cm)
• 📦 Organizer for screws (so as not to confuse the assembly)
• 🛠️ Tweezers with curved ends (for working with plumes)
• 🔋 Multimeter (to check battery contacts)

Pay special attention to the temperature regime when the glue is heated. Overheating over 80°C can damage OLED-screen or battery: The optimum temperature for softening the adhesive is 60-70°C. Also, don’t forget about grounding: static electricity can disable the motherboard chips.

⚠️ Note: If you understand the Mi 9T Pro with a broken display, be sure to stick tape on it before heating. Glass fragments can fly apart when exposed to temperature.

Step 1: Removing the back cover - how not to damage the glue and latches

Mi back cover 9T The Pro is attached to double-sided tape and plastic latches, and the first mistake that newcomers make is trying to tamper with it from the corner where the camera is located, and this leads to cracks in the lens area or damage to antenna lines.

The right course of action:

1. Turn off your smartphone and remove it. SIM-map.
2. Heat the hair dryer of the edge of the cover around the perimeter (10-15 seconds per site).
3. Insert the mediator in the gap between the lid and the case at the Type-C connector.
4. Carefully drive the mediator along the edge, separating the glue. Reheat the site when resisting.
5. After separation 2/3 Remove the lid, holding it by the upper part (there are plumes).

If the lid doesn't lend itself, don't use too much force. Maybe the glue hasn't softened enough or you missed the latch. 9T Pro has a hidden latch near the on button – it is easy to miss.

Step 2: Shutting off the battery – why it’s critical to do it first

Once the lid is removed, the first thing you need to do is turn off the battery. 9T Pro, it's located at the top of the device and it's covered with a black protective film, and trying to work with a connected battery can lead to a battery:

• 🔥 Short circuit when touching the screwdriver of the motherboard.
• 💥 Damage to the power controller (repair cost up to 50% of the price of the smartphone).
• ⚡ Electric shock (in rare cases, if the capacitors are not discharged).

To turn off the battery:

1. Remove the protective film from the battery (it is glued weakly, you can tweezers).
2. Screwdriver. PH00 unscrew the screw that fixes the battery connector.
3. Carefully slap the connector with a plastic spatula and disconnect it.

After the battery is turned off, wait 1-2 minutes, this will discharge the residual capacitors on the board. You can check the absence of voltage with a multimeter by applying probes to the contacts of the connector.

⚠️ Warning: If you see a bloated battery (the lid is raised in the center), do not continue disassembling. The bloated battery may ignite if punctured. In this case, a professional replacement is required at the service center.

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Before you turn off the battery, take a picture of all the plumes, and when you build them back, you can avoid connection errors.

Step 3: Dismantling the motherboard - working with plumes and screws

Mi motherboard 9T The Pro is mounted on 12 screws of different sizes. They're easy to confuse, so use an organizer or stick the screws on the scotch in order of twisting. The board also has three main plumes:

• 📸 Main camera plume (three modules: 48 MP) + 8 MP + 13 MP).
• 🎤 Microphone plume and dynamics.
• 🔄 The tail of the retractable front camera (the most fragile!).

Deconstruction procedure:

1. Unscrew all screws, starting with the longest (at antenna modules).
2. Disconnect the plumes in order: speaker → main chamber → front-camera.
3. Squash the board with a plastic blade on the Type-C connector side.
4. Carefully raise the fee, checking if it clings to unnoticed plumes.

Be very careful with the front camera plume, which passes through the mechanism of the retractable module, and its damage will lead to a broken selfie camera, if the plume breaks, you will need to replace the entire mechanism (cost - from 3,000 rubles).

Step 4: Disassembling the retractable camera mechanism is the most difficult step

Retractable camera mechanism is the most vulnerable element in the Mi 9T Pro. It costs more to repair than replacing a display or battery, and if the camera stops retracting or jamming, the reasons may be as follows:

• 🔧 The garbage got into the guides (dust, sand).
• 💧 Corrosion after moisture is injected.
• ⚡ Damage to the motor or gears.
• 🔌 Power plume break.

For diagnosis:

1. Check if the camera is blocked by the protective glass (sometimes it shifts after falling).
2. Connect your smartphone to charging – if the camera is retracting, the power problem is.
3. Light a flashlight into the slot of the mechanism: visible contamination indicates the need for cleaning.

If a complete disassembly of the mechanism is required:

1. Unscrew the 4 screws that lock the camera module.
2. Carefully remove the mechanism, do not pull the plume!
3. Use alcohol and a soft brush (not cotton swabs - they leave fibers behind).
4. Lubricate the guides with silicone lubricant (not lithole or WD-40!).

⚠️ Attention: If the camera is skewed or jammed after assembly, don't push the mechanism. It can break the gears. You'd better take it apart and check it again.

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Retractable camera mechanism is the most expensive part of the Mi 9T The Pro is in repair. It costs 40-60% of the cost of a smartphone in the secondary market.

Step 5: Replace the display - nuances with OLED-screen-and-glue

Display Mi. 9T Pro is it OLED-It's a sensor array with an integrated touch layer, and it's harder to replace than smartphones. IPS-screens, because:

• 🔥 A thin glue layer that is easily damaged when heated.
• 📱 Flexible plumes going to the motherboard (they are easy to tear).
• 💡 Lighting that can go out when the wrong connection.

Step-by-step:

1. Heat the screen with a hair dryer around the perimeter (temperature - 70).°C, time - 2-3 minutes).
2. Suction the display from the bottom edge (there are no plumes).
3. With a mediator, separate the glue, moving from the center to the edges.
4. Disconnect the display and sensor plumes (they are located under metal protection).
5. Install a new screen by pre-cleaning the frame of the old glue with isopropyl alcohol.

When installing a new display, use double-sided scotch 3M 9448A Or similar, it provides better fixation than cheap Chinese counterparts:

• 🎨 Color rendering (whether there is yellow or greenish tint).
• 👆 Sensor operation (especially at the edges).
• 🔦 Lighting (whether there are dark spots or stripes).

Back-Building and Testing – How to Avoid Errors

Assembling Xiaomi Mi 9T Pro should be in reverse order, but taking into account a few critical points:

• 🔧 Screw the screws cross-curl to avoid skewing the board.
• 📶 Before installing the cover, check the Wi-Fi and GPS — sometimes the antenna plumes shift.
• 🔋 Connect the battery last, after checking all the plumes.
• 🔍 After assembly, check the tightness of the body - if there are gaps, moisture protection (IP53) won't work.

For testing, use:

• 📱 Test codes: ##4636## - battery and network information. ##6484## - sensor test. ##64663## - display check.
• 🔧 Annexes: CPU-Z (for sensor testing), Display Tester (on broken pixels).

If after assembly the smartphone does not turn on:

1. Check if the battery is connected.
2. Make sure the power button is not recessed (sometimes it sticks after disassembly).
3. Connect to charging – if charging is going on, but the screen does not turn on, the problem is in the display or plumes.

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If after assembly the smartphone overheats or discharges quickly, most likely, the motherboard is poorly fixed or the thermal paste on the processor is damaged.

FAQ: Frequent questions about the Xiaomi Mi disassembly 9T Pro