Xiaomi Redmi Note 7 has become a hit for its value for money, but over time, any device requires intervention: whether it’s replacing broken glass, installing a new battery or cleaning the speakers from dust, knowledge of the design of the gadget is necessary for any owner. The process of dismantling this device has its own unique features that distinguish it from earlier models of the manufacturer.
The main feature of the design is the way the rear panel is attached, which is completely made of glass and glued around the perimeter. This requires the master to be more accurate, use a specialized tool and strictly observe the temperature regime when heating the case. Incorrect actions at the initial stage can lead to chips or cracks that will make further assembly impossible without buying new parts.
In this guide, we will take a detailed look at every step of the way, from the workplace to the final test of the system's functionality, and you will learn which plumes require special attention when you turn off, how to safely heat the adhesive layer, and what tools are really needed to make a good job, and attention to detail is crucial here.
⚠️ Warning: Before starting any work, be sure to turn off the device. Working with the motherboard on can short-circuit and irreversible damage to electronics.
Tools and workplace preparation required
The Redmi Note 7 is not a good disassembly without a properly selected set of tools. Unlike budget models with plastic covers, you will need heating equipment. The ideal solution is a professional separator or thermostol, but at home you can use a building hair dryer, strictly controlling the heating temperature, so as not to damage the display matrix or internal components.
To work with the adhesive layer and remove the glass will require thin metal blades and suction cups. Plastic cards (mediators) are also useful for primary detachment, but they may not cope with the powerful adhesive composition, so stock up on a few pieces. Don't forget about a set of precision screwdrivers, since the screws in this smartphone have different lengths and types of threads.
- 🔧 Set of screwdrivers (cross-crosses) PH000, PH00) hull-screw.
- 🌡️ Building hair dryer or heating pad for uniform heating of the back cover.
- 🧲 Magnetic mat or organizer for sorting screws by disassembly stages.
- 🧴 Isopropyl alcohol or special liquid B-7000 glue-residue.
- 🧤 Antistatic gloves to protect components from static electricity.
Special attention should be paid to the organization of the workspace. The surface should be clean, flat and well-lit. Small details, such as a vibrator motor or charging connector, are easy to lose if they fall on the carpet or into the slot of the table. It is recommended to use a light background in which all screws and components are clearly visible.
Removal of the rear glass cover
The most risky stage of dismantling Xiaomi Redmi Note 7 is the compartment of the rear panel. The glass is heated unevenly, and if you overdo it on one side, it can burst. Start by carefully warming the perimeter of the device, driving the hairdryer in circular motions. Temperature should not exceed 80-90 degrees Celsius, so as not to damage the battery located directly under the lid.
After warming up, use a suction cup to create a small gap in the bottom of the body. Insert a thin metal blade or mediator into the resulting gap. Move the tool along the edges, gradually cutting the adhesive layer. Don't try to open the lid with a jerk, act slowly and systematically, warming the cooling areas as needed.
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If the glass cracks when removed, paste a wide transparent cross-cross tape over it, which will prevent the fragments from scattering and will allow you to safely complete the procedure of removing the lid.
Once the lid is successfully removed, you'll see a plastic frame that hides most of the components. At this point, it's important not to damage the fingerprint scanner plume if it's not already disconnected, although in this model it often goes in a separate module. Carefully clean the end of the case and the lid of the old glue before reassembling.
Dismantling the protective plate and disconnecting the plumes
And underneath the back, there's a long plastic plate that holds the main plumes and protects the top of the motherboard, and it's mounted with a lot of screws of different sizes, so it's important to keep the screws in order and remember where they are, and if you mess up the screws when you build them, you can damage the threads in the plastic or you can break through the body.
Once the plate is removed, you have access to the main modular connectors, and the first thing you need to do is turn off the battery to turn off the system, and then you can safely disconnect the plumes of the display, the touchscreen and other components, and use the plastic blade to gently lift the connectors, avoiding the use of metal tools near the contacts.
| Component | Location. | Type of attachment | Features |
|---|---|---|---|
| Battery | Center of the hull | Glue strip + connector | Requires heating to remove |
| Basic fee | Upper part | Screws + plumes | Lots of small screws under the plate |
| Lower fees | Bottom of the hull | Screws + plume | There's a charging connector here. |
| Camera module | Center-top. | crone | Fragile lens |
When working with the motherboard, be extremely careful. Even a microscopic scratch on the track can knock the device out of order. If you plan on a full screen replacement, you may need to remove the board, but you can often do with disconnecting the plume and gently moving the module to the side.
☑️ Check before charge is withdrawn
Removal of the battery and replacement of the batteries
The battery in the Redmi Note 7 is placed on double-sided tape, which is the standard for modern smartphones. To remove it, you need to apply heating again, but through the back of the case or gently putting the battery on a plastic card. Under no circumstances do you use sharp metal objects that can puncture the lithium polymer cell and cause fire.
The process requires patience: warm the surface, press the battery slightly to soften the glue, and slowly move it. If the battery is swelling, you need to work with extreme caution, trying not to damage the shell. After removing the old element, carefully clean the seat of glue residue with alcohol.
⚠️ Warning: Never attempt to remove the battery unless the device is switched off or the power connector is disconnected from the motherboard.
When installing a new battery, make sure it has the original capacity and labeling. Using cheap analogues can lead to rapid discharge or malfunction of the system. Use a special glue B-7000 or double-sided electronics tape, applying it with a thin layer around the perimeter to fix it.
Replacement of the display module and touch screen
The screen in Xiaomi Redmi Note 7 is the most expensive component after the motherboard. Replacing the module assembled (frame + glass + matrix) is easier and faster than resticulating individual glass. If you change only glass, you will need professional equipment for separation, which at home is almost impossible to do without the risk of damaging the matrix.
When you install a new module, first check its performance by connecting the plumes to the board without fixing the case. Make sure the image is clean, there are no broken pixels, and the touch screen responds to touches throughout the area. Only after successful testing can you apply glue and fix the frame.
- 🖼️ Check the absence of dust between the layers of the matrix and glass before gluing.
- 🔌 Make sure the plumes sit tightly in the connectors until a characteristic click.
- 🧪 Use a degreaser for the ends of the frame before applying new glue.
- ⏳ Let the glue dry during 1-2 loaded hours for reliable fixation.
The important thing is to move the speaker and proximity sensors from the old module to the new one, which are often sold separately or can already be installed on a new frame, and be careful when working with the tailpipe of the bottom speaker, as it is very thin and easily breaks when handled carelessly.
What if the screen does not burn after replacement?
Assembly of the device and verification of functionality
The final step is to build in reverse sequence, and you can put all the screws in their places, based on your previous notes or your previous diagram, and you can focus on the screws around the plume connectors, which you can't pull over so you don't crush the connector, but you can also get out of the loop.
Before the final sticking of the back cover, it is recommended to start the device first. Connect the battery, press the power button and wait for the operating system to load. Check the cameras, microphone, speakers, vibrator and communication modules (Wi-Fi, Bluetooth, GSM).
Use high-quality glue to stick the back cover, applying it in a thin continuous strip around the perimeter. Avoid getting glue inside the case, on the cameras or into the connectors. After pressing the cover, lock the smartphone with stationery gums for 30-60 minutes until the adhesive compound is fully polymerized.
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The quality of disassembly and assembly directly affects the moisture protection and durability of the smartphone. Don't save on consumables and take time to clean the surfaces.