Xiaomi Redmi Note 5: how to open the back cover and not damage the case

Disassembling the Xiaomi Redmi Note 5 is a task that can be required when replacing a broken screen, installing a new battery or cleaning the dynamic head from dust. Despite the fact that the device was released several years ago, its reliable design still attracts interest from craftsmen and enthusiasts who want to extend the life of the gadget on their own.

The challenge is that the back cover in this model is glued around the perimeter to a special sealant, rather than being fixed by screws. This is standard practice for modern smartphones, which ensures the construction is monolithic, but complicates access to the insides. Before you start, you need to prepare tools: a thin plastic blade, a sucker, a dryer for softening the glue and a set of screwdrivers.

It's important to understand that any interference with the design of the device can affect its tightness and moisture protection. If you're not sure about yourself, you should contact the service center. But if you decide to act on your own, this article will be your step-by-step guide to avoid common mistakes and preserve the integrity of all components.

Tools and workplace preparation required

Before starting the dismantling, you need to organize a comfortable workspace, the table should be clean, well-lit and free from foreign objects that can scratch the body or get lost, it is recommended to use an antistatic mat or at least a clean fabric so that small screws do not fly around the room.

For a good disassembly, you will need a specific set of tools, without which the risk of damaging the smartphone increases significantly. Using sharp metal objects instead of plastic blades can lead to battery failure or damage to the display, which will entail additional costs.

• 🔧 Precision screwdrivers (cross-haired) P2 and flat) for screw twisting.
• 🔥 Dryer or thermophene for heating the adhesive layer around the perimeter of the housing.
• 🪒 Plastic mediators or blades for snapping latches.
• 🧲 Magnetic mat or organizer for sorting screws of different sizes.

Special attention should be paid to the heating source. A normal hair dryer may not cope with the task if the glue is too old and hardened, whereas a building hair dryer can overheat the matrix. The optimal heating temperature is about 80-90 degrees Celsius, you need to keep the air flow at a distance of 3-5 cm from the surface.

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Heat the body evenly from all sides, moving the hair dryer around the perimeter, and do not heat one point so as not to damage. OLED-matrix.

The process of heating and separation of the rear panel

The first and most important step is to soften the adhesive compound that holds the back cover. The Redmi Note 5 uses a fairly aggressive adhesive, so it's best not to even try to do cold disassembly, which is guaranteed to lead to cracks in the glass. Turn on the hair dryer and start warming the perimeter of the device.

Hold the phone in your hand (using a glove or a dense fabric to avoid burning yourself) and warm the edges evenly for 2-3 minutes. Periodically check the temperature of the glass with your finger - it should become hot, but not burning. If the case cools, the heating procedure should be repeated.

⚠️ Warning: Never direct a jet of hot air directly into the camera area or the center of the screen, as this can cause yellow spots on the matrix or damage to the sensor.

Once the body is warm enough, place the suction cup at the bottom of the back cover, closer to the edge, but not at the very corner. Pull the suction cup upwards, creating a small gap between the glass and the frame. Insert a thin plastic blade or mediator gently into this gap.

Move the shoulder blade along the perimeter, gradually cutting through the adhesive layer. Don't try to open the lid with a jerk -- act slowly, returning to heat if the adhesive hardens again. Be especially careful in the top where the plumes are located.

Dismantling internal components and disconnecting plumes

When the back cover is completely detached, you'll see the interior of the smartphone, and immediately notice that most of the components are covered by a metal protective plate that's screwed, and you'll need to unscrew them using a screwdriver of the right size to access the connectors.

The first step to take after removing the safety plates is to turn off the battery, a critical step that shuts down the device and prevents short circuits when working with other components, and the battery connector is usually located at the bottom or center of the board.

Then you have to turn off all the other plumes, the display module, the main and front cameras, and the plume of the buttons and speakers. To do this, use a plastic blade or nail, gently lifting the connector up. Don't pull the wires themselves, only the hard part of the connector.

Once all communications are turned off, you can retrieve the motherboard, which is usually held on a few screws around the perimeter and in the center, and be careful, there are antenna contacts under the board that you need to keep in mind.

Replacement of the battery and work with the glue layer

One of the most common reasons Xiaomi Redmi Note 5 disassembly is to replace a worn-out battery.The old battery can swell, discharge quickly or turn off the phone in the cold. Removing the old battery is a process that requires patience, since it is planted on double-sided tape.

Do not try to tamper with a metal screwdriver in the battery, as a lithium polymer cell puncture can cause fire. Use a plastic card or a special strip to pull it out. If the battery is very tight, you can warm up the back of the case slightly (if it is not already removed), or use isopropyl alcohol by dripping it under the edge of the battery.

After removing the old element, you must carefully clean the niche of the residue of the old glue. The surface should be smooth and fat-free. To install a new battery, use special adhesive strips (B-7000 or analogues), which come with a new battery or are purchased separately.

⚠️ Warning: When installing a new battery, make sure its connector sits tightly in the board's socket.A single connector will cause the phone to not charge or show the wrong percentage of charge.

After you install the new battery, don't rush to close the lid. First, check the device's performance: plug in the display plume and try turning on the phone. If everything works correctly, you can start the final assembly.

Assembly of the device and verification of functionality

The assembly is done in reverse order, but there are some nuances: the main task is to properly put all the plumes in your channels and not to squeeze them with metal plates, any tension can lead to a break in the future during operation.

Put the motherboard in place, twist all the screws. Pay attention to the screws of different lengths — they can not be confused, otherwise you can damage the thread or the board itself. Connect the battery plume last, just before the back cover closes.

Before applying a new glue, check the operation of all modules:

• 📞 Make a test call to check the microphone and speaker.
• 📸 Take a few photos on the front and main camera.
• 📶 Check Wi-Fi, Bluetooth and mobile internet.
• 🔌 Connect the charger and make sure the charging is correct.

If all tests are successful, apply a new layer of glue around the perimeter of the frame. Use a special electronics glue (e.g., B-7000 or T-7000) that remains elastic after drying. Apply it with a thin strip, avoiding cameras and sensors.

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The quality of the case gluing directly affects the dustproofness of the smartphone, so do not save on glue and press the cover tightly until completely dry.

Frequent errors and precautions

In the process of repairing the Xiaomi Redmi Note 5, beginners often make mistakes that can cost the device life. One of the most common is ignoring the heating of the case. Trying to remove the lid without first warming up 90% of the time ends in cracked glass.

Another mistake is the use of inappropriate tools: Metal blades can leave deep scratches on the frame or, worse, damage the current tracks on the board. Always use dielectric tools to work inside the case.

Keep in mind the statics. Although modern smartphones have some protection, static electricity can disable sensitive power or memory controllers. Work on an antistatic mat and periodically touch a grounded metal object.

⚠️ Warning: If you find a ballooning battery in the process of disassembly, immediately stop working and remove it with the utmost care.

Also worth mentioning is the screws. The Redmi Note 5 uses screws of different lengths to attach different nodes, and if you confuse them, you can damage the thread or even break the board with a long screw. Sort them out as you unscrew them.

Restoration of leakage and final tests

After assembly, it is important to ensure maximum leakage: the glue should dry for at least 2-3 hours, and it is better to leave the phone under the press (for example, under a stack of books, but without fanaticism, so as not to crush the screen) for the night, this will ensure a reliable fit of the cover.

The final test should include a heating test, leave the phone on for 15-20 minutes and watch the temperature of the case, and if the device is warming in the battery or processor area without active load, then the plume is not fully connected or there is a short circuit.

Check the touchscreen across the screen. Sometimes, after a sloppy build, there may be "dead zones" or false presses in the corners, which indicates a skewed frame or damage to the digitizer plume.

Successful disassembly and assembly of Xiaomi Redmi Note 5 is not only saving money on the service, but also a valuable experience. Following these recommendations, you can qualitatively replace components and extend the life of your smartphone.