Modern Xiaomi smartphones often delight users with excellent specs, but repairing these devices requires a special approach: the rear panel, or “back”, in many models is glued to a special factory glue, which makes the process of dismantling it difficult and risky. A sloppy autopsy can damage the plumes, rupture the fingerprint scanner plume or even break the battery itself.
In this article, we will discuss how to remove the lid from the smartphone of Xiaomi without damaging the internal components. We will look at the necessary tools, the steps of heating the glue and the sequence of actions for different series of devices. Attention: if you do not have experience with small electronics, it is better to entrust this procedure to the professionals in the service center.
However, if you are confident and willing to act carefully, our guide will help you avoid common mistakes. It is important to understand that the design of the case of the Redmi Note, Mi and Poco models can be significantly different, so there is no universal method of "one motion"; then we will move on to the preparation of the workplace.
Required tools and workplace preparation
Before you start dismantling, you need to organize the workspace, the surface of the table should be clean, flat and well lit, ideally use an antistatic mat, but you can also use a regular wooden table without unnecessary debris, you need special tools that will ensure the safety of the process.
The main heating tool is the thermophene, or at least a quality heating pad. A regular hair dryer rarely gives enough temperature to soften the B-7000 or T-7000 industrial adhesive used in Xiaomi plants, and suction cups, mediators (plastic blades) and a thin blade will also be required.
☑️ Preparation for opening of the hull
Don't forget to prepare the screw tank if the model implies that they are under the plugs. Magnetic mat will be an excellent assistant to not lose tiny fasteners. It is also recommended to have isopropyl alcohol on hand for the final cleaning of surfaces.
Features of the design of smartphones Xiaomi and Redmi
Xiaomi engineers use different build methods depending on the price segment of the device. In low-end models, Redmi lids are often held on latches and minimal adhesive, while the flagships of the Mi and Xiaomi series can be completely sealed. Understanding the type of mounting is key to success.
In most modern models, the fingerprint scanner is located on the back and connected to the motherboard with a thin plume, which is the most vulnerable part of the structure. If you pull the lid sharply without disconnecting the connector, you are likely to tear the plume, after which the scanner will stop working.
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Before starting work, be sure to remove SIM-If you forget to do this, the trays can deform or damage the inside of the device when they are heated and pressured.
The back glass can be either a separate element or part of a framed module. In some Redmi devices, the cover is plastic, which makes it more flexible, but also more prone to cracking when heated. Be extremely careful when working with materials that are sensitive to temperature.
The process of heating and softening glue
Heating is the most critical step, and the goal is to heat the adhesive layer around the perimeter to a temperature. 80-90 Celsius, but not overheating the battery or display, overheating can cause the battery to bloat or yellow spots on the surface. OLED-screen.
Use a hair dryer, moving it evenly around the perimeter of the back cover. Do not hold the flow of hot air at one point for more than 3-5 seconds. The optimal warming time is from 3 to 5 minutes depending on the power of the equipment. You can check the temperature with the back of the palm - the body should be hot, but tolerant to touch.
Alternative to fenu
After warming up, try to gently apply the angle of the cover with the mediator. If the tool is difficult to enter, the heating should be continued. Never use metal blades to initially open the gap, as they damage the battery immediately below the glass. Only act with plastic tools.
Technique for safe opening of the body
When the glue is softened, insert the suction cup into the bottom of the back panel (where there is no fingerprint scanner) and pull up slightly. At the same time, insert a plastic mediator into the gap. Move the tool along the perimeter, cutting the adhesive layer.
Move slowly, making small, forward movements. If you feel strong resistance, stop and warm up again. You can't have a sharp jerk. Pay special attention to the area around the camera and the fingerprint scanner, where the glue can be applied with a thicker layer.
| Smartphone zone | Type of attachment | Autopsy risks | Recommended instrument |
|---|---|---|---|
| Lower end | Glue + latches | Damage to the plume speaker | Mediator, sucker. |
| Camera area | Tight glue | Cracking of camera glass | Thin mediator |
| Imprint scanner. | Glue + plume | The plume break | Plastic spatula |
| Side edges | Latchers | Breaking plastic hooks | Thin blade (carefully) |
Once the perimeter is passed, don't rush to remove the lid completely. Xiaomi models often have extra glue in the center or under the camera module. Carefully lift the panel and look inside in good lighting.
⚠️ Attention: If you feel that the lid is holding in the center, don't pull it by force. It's probably a glue cushion under the battery or the camera. It requires spot heating of the area.
Disabling the plumes and the final withdrawal
When the lid is lifted a few millimeters, you need to visually assess the connections. In 90% of cases, the fingerprint scanner is connected to the board. Find the connector and gently disconnect it with a nail or a plastic blade.
In some older Redmi models, the plume can go not to the scanner, but to the NFC antenna, which is also pasted on the inside of the lid. Be careful of any pulling elements. Only by making sure that there are no connections, you can finally remove the back panel.
Put the lid off in a safe place so it doesn't get dusted or fall, and now you can access the insides of the device to replace the battery or other components, and the cleanliness inside the case is critical to the longevity of the device.
Frequent errors and precautions
One of the most common mistakes is to ignore the battery level: before opening, discharge the battery to 15-25%. A fully charged battery when punctured or severely deformed can catch fire or explode, which is extremely dangerous.
Another mistake is to use too aggressive solvents to remove old glue. Acetone or liquids with its content can melt the plastic of the case or damage the oleophobic coating of the display if the liquid leaks under the frame. Use only special cleaners or isopropyl alcohol.
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Safety is above all: if during the heating process the battery began to swell or the smell of burning appeared, immediately stop work and ensure the ventilation of the room.
⚠️ Warning: Never leave the thermophene on unattended. airflow temperature can reach 300-400 The degree is enough to ignite paper or plastic in seconds.
Also, don't try to use force if the lid doesn't lend itself. It's better to spend an extra 5 minutes warming up than buying a new case or repairing a broken screen. Patience is the master's main tool.