How to Disassemble Xiaomi Mi 9T independently: photo instructions, tools and expert advice

Xiaomi Mi 9T (He's a Redmi. K20 In some regions, it is a popular smartphone with a retractable front camera that is still popular among users years later, but like any technology, it is not eternal: over time, you may need to replace the battery, speaker, charging plume or even screen. Disassemble this device yourself - a task not easy, but feasible, if you know the nuances of the design and avoid typical errors.

In this article you will find a step-by-step photo instruction, a list of necessary tools, as well as unique tips for disassembling without damaging the retractable mechanism of the camera - the most vulnerable part of the Mi. 9T. We will also tell you what parts most often fail, how to diagnose them and where to buy quality parts. If you have never disassembled smartphones, it is no problem: our recommendations will help minimize the risks.

Warning: Disassembly Xiaomi 9T Errors can cause the camera's retractable module to break down (it costs a lot to repair). 30-50% If you're not sure about your phone, if you're going to have to pay for it, if you're going to have to short circuits, you'd better go to the service center, but if you're going to do it yourself, read on.

Preparation for disassembly: tools and security measures

Before you start, you can pack everything you need, and without the right tools, you're at risk of damaging your body, your plumes, or even getting hurt, and here's a full list of what you're going to need:

• 🔧 Set of screwdrivers (cross-haul) PH00, flat 1.5 mm, five-pointed Y0.6 back-coat).
• 📱 Plastic mediators (2-3 pc.) or guitar mediators - for separation of the cover.
• 🔥 Dryer or thermo-air station (at least 800 W) for softening the adhesive.
• 🧲 Magnetic mat or screw container – to avoid losing small details.
• 🛠️ Suction (optional) - helps to lid after heating.
• 🔌 Multimeter – to check the battery and contacts after disassembly.
• 🧴 Isopropyl alcohol (90%+) — Cleaning contacts and removing glue residues.

Also prepare the workplace: it should be well lit, clean and without static electricity (ideally - antistatic mat). 9T has fragile plumes, so avoid disassembly on soft surfaces (sofa, bed) where parts may get lost or bend.

⚠️ Warning: If the phone battery is swollen, don't heat it with a hair dryer and try to disassemble it yourself! The bloated battery may ignite.

Before disassembling, be sure to turn off the phone and remove it. SIM-If the battery is not removable (and in Mi) 9T It is just like this, it will have to be manually turned off after the back cover is removed - we will talk about this in the next section.

Removal of the back cover: how not to damage the glue and plumes

Xiaomi's back cover 9T It's glued around the perimeter, and it has latches in the top and bottom, and the main challenge is not to damage the fingerprint scanner plume that goes from the lid to the motherboard, and if you tear it off, you have to change the entire module (cost). ~1500-2000 ruble.).

Removal algorithm:

1. Heat the edges of the phone with a hairdryer (temperature) ~60-70°C) during 2-3 You can keep your water flowing evenly along the perimeter, and don't send hot air to one place for too long, because it can warp the plastic.
2. Insert a plastic mediator into the gap between the lid and the frame (start with the lower left corner where there are no plumes). Carefully drive it along the body, gradually separating the lid.
3. Once the lid starts to give in, don't pull it too hard, because there are latches underneath the top (near the camera) and click them one by one.
4. After removing the lid, do not put it down with the screen - there are glue residues on the inside that can stick to the table.

If the lid doesn't lend itself, don't use too much force, you better warm up the problem area again. 9T The adhesive is particularly strong in the area of the camera and USB-Type C connector.

When you remove the lid, you'll see the battery, the motherboard, and a few plumes. Don't touch the metal parts with a screwdriver, it can cause you to short circuit, wear an antistatic bracelet, or periodically touch an earthed object (such as a heating battery).

Disconnection of the battery and work with the motherboard

Before touching any components, be sure to turn off the battery. - Xiaomi 9T need:

1. Find the battery connector (it is located next to the bottom of the board, marked in black or red).
2. Carefully put a plastic blade on the connector and disconnect it.
3. Wait 1-2 minutes - this will allow the residual capacitors to discharge on the board.

Now you can start dismantling the other components. 9T located:

• 📶 Antenna modules (stick to the cover, connected by plumes).
• 🔊 Speakers and microphones (lower speaker often fails due to dust intrusion).
• 🔋 Charging controller (if the phone is not charging – check this chip with a multimeter).
• 📷 Retractable camera connector (fragile, if damaged, the camera will cease to extend).

If you need to replace, for example, the charging connector, first disconnect all the plumes that prevent the dismantling of the board. 9T board is attached to 12 screws of different sizes - remember or photograph their location, so as not to confuse the assembly.

⚠️ Warning: If you notice darkening on the board, swollen capacitors or traces of oxidation are signs of moisture. In this case, be sure to dry the rice or silica gel board for at least 24 hours before assembly and clean the contacts with alcohol.

Replacing the retractable mechanism of the camera will require a complete disassembly of the phone, including the removal of the screen, a process that is more complex and risky — if you are not sure of your skills, it is better to trust it with professionals.

Battery Replacement: A Step-by-Step Guide

Battery is one of the most frequently replaced parts in Xiaomi 9T. Signs that the battery needs replacement:

• ⚡ The phone's running out of power. 2-3 hourly with moderate use.
• 🔋 The battery swelled (the cover began to "step away" from the body).
• 📉 The percentage of charge jumps (for example, from 50% immediately drops to 15%).
• 🔌 The phone does not charge or only charges in a certain position.

To replace the battery, follow the instructions:

1. Turn off the old battery (as described above).
2. Put a plastic spatula on the battery on either side. 9T It's glued to double-sided tape, so it's going to take a lot of effort. Don't use metal tools, they can puncture the battery!
3. If the battery fails, warm it up with a dryer on the back (maximum 60).°C).
4. After extraction, clean the installation site from glue residues with alcohol.
5. Install a new battery (we recommend the original battery). BM4D or qualitatively ATL).
6. Stick it to a new double-sided scotch (for example, 3M 9448A).

After replacing the battery, do not turn on the phone immediately - let the glue grab (10-15 Then plug in the charger and check if it's charging. If the phone's not turning on, check the plug and the power button.

💡

Before buying a battery, check it for authenticity: the original Xiaomi batteries have a hologram on the package and a serial number that can be checked on the manufacturer’s website.

Disassembly of the retractable camera: risks and recommendations

Retractable camera mechanism is the most vulnerable part of Xiaomi 9T. His breakdown often happens because of:

• 💥 Phone drops (even from a small height).
• 🧊 Infection of dust or sand into the mechanism.
• 🔋 Battery discharge during camera operation (mechanism may "jam").
• 🛠️ Improper disassembly (damage to the plume or gears).

If the camera stops retracting, try the software reset first:

1. Reboot the phone.
2. Open the Camera app and switch to the front camera.
3. If the camera doesn’t retract, try to manually pull it upwards easily (sometimes helps with jamming).
4. If nothing works, a disassembly will be required.

To repair the chamber mechanism:

1. Remove the back cover and battery (as described above).
2. Disconnect the camera plume from the motherboard.
3. Unscrew 4 screws that attach the mechanism to the frame.
4. Carefully remove the module. Don't pull the plume!
5. Check the gears for chips or dirt, clean the mechanism with alcohol.
6. If the gears are broken, replace the entire module (cost) ~3000-4000 ruble.).

⚠️ Warning: When disassembling the camera mechanism, do not touch the lenses - they are left on prints that will then be visible in the photo.

If you're not sure about your skills, you should go to the service -- retractable camera repair requires jewellery precision. In most cases, it's cheaper to replace the entire module than to fix it.

Phone Assembly: How to Avoid Mistakes

Assembling Xiaomi 9T After a disassembly, it's a very important process:

• 🔩 Screws: make sure they're all swirled into their places. 9T there are screws of different lengths - if you mix up, you can damage the board.

After assembly:

1. Turn on your phone and check all the features: Camera (main and front), Charging (wired and wireless if supported), speakers and microphone, fingerprint scanner, screen sensor.

If something doesn’t work, take the phone apart again and check the corresponding plumes.

If the phone overheats or discharges quickly after assembly, possible reasons:

• Bad battery contact.
• Damage to the thermal paste on the processor (you will have to apply a new one).
• Short circuit on the board (multimeter diagnostics are needed).

💡

The most common build error is forgetting to plug in the fingerprint scanner plume, so if the phone doesn't recognize the fingerprint after it's turned on, check the connector.

Where to buy spare parts for Xiaomi 9T How not to run into a fake

The quality of the parts directly affects the performance of the phone after repair, and here are the reliable sources for buying components:

When buying spare parts, pay attention to:

• 📄 Availability of a guarantee (at least 30 days).
• 📷 Photos of real goods (not stock pictures).
• ⭐ Customer reviews (especially with photos of installed details).
• 🔍 Compatibility – make sure that the spare part is suitable for Xiaomi Mi 9T (M1903F10G).

Avoid buying from sellers with:

• 🚩 Lack of sales history.
• 📉 Prices are well below the market (likely fake).
• 📦 Lack of packaging or marking.

If you are buying a screen or battery, ask the seller to check the part before shipping (e.g., take a photo of the screen running or test the battery with a multimeter).

FAQ: Answers to Frequent Questions