Xiaomi Redmi smartphones have a reputation for reliability, but even they are not immune to mechanical damage or failure of internal components. Often owners face broken display glass, battery wear or breakdown of the bottom charging plume. In such situations, there is an urgent need for quality repairs, which begins with the correct dismantling of the case.
The Xiaomi Redmi Note 7's opening procedure requires care, as the design of the gadget involves the use of adhesive compounds and hidden screws under decorative elements. Wrong actions can damage the plumes or rupture the contacts, which will make it impossible or economically impossible to restore the device. It is important to understand that the Note 7's glass back cover is particularly fragile and requires preheating for safe removal.
In this guide, we will take a detailed look at each stage of disassembly, from the preparation of the workplace to the disabling of the motherboard plumes, you will learn about the necessary tools, the specific risks when working with this model and the professional techniques that are used by the masters of service centers.
Tools and workplace preparation required
Before you start to physically affect the body of the smartphone, you need to organize a suitable workspace, the surface should be clean, flat and well lit so that small screws are not lost and the details are clearly visible. Using a magnetic mat or special organizers for screws will greatly simplify the process of reverse assembly.
For a quality disassembly Redmi Note 7 you will need a specialized set of tools that goes beyond the standard household screwdriver. Lack of the right inventory often causes torn slits on the screws or damage to plastic latches of the case.
- 🔧 A set of screwdrivers with Phillips bits (PH000, PH00) Pentalobe (if there are external screws).
- 🔥 A hair dryer or professional heating pad for softening the glue under the back cover.
- 📱 Plastic mediators, suction cup and thin metal scalpel or blade.
- 🧤 Antistatic gloves and tweezers with dielectric tips.
Special attention should be paid to the heating source. Household hair dryer may not give enough temperature to soften the industrial glue that holds the glass, so it is better to use a building hair dryer with the ability to adjust the temperature or a special heating platform.
☑️ Preparation for the dismantling of the Redmi Note 7
Removal of the rear glass cover
The most critical step in the whole process is the removal of the back panel. Unlike the budget models with a plastic case, the Redmi Note 7 is equipped with glass that is glued around the perimeter.
⚠️ Warning: Heat only the perimeter of the case, avoiding prolonged exposure to hot air on the central part where the battery and motherboard are located, so as not to damage them.
Warm up the edges of the device evenly for 2-3 minutes to a temperature of about 80-90 degrees. You can check the readiness of the glue by carefully trying to push the edge with a mediator. If the tool enters with force but without creaking, you can continue.
Insert the suction cup into the bottom of the back cover, closer to the logo, and slightly pull upwards, creating a gap. In the resulting gap, carefully insert a plastic mediator or a thin blade, trying not to immerse it deeper than 2-3 mm, so as not to damage the plumes or the battery itself.
What to do if the lid is cracked?
Swipe the mediator around the perimeter, gradually releasing the adhesive layer. Don't make sudden movements, because the upper part of the glass may have antenna lines or plumes connecting the modules. Once the adhesive is cut all over the circuit, the lid can be carefully removed.
Dismantling the protective plate and disconnecting the plumes
When you remove the back cover, you'll see an interior space that's covered by a black plastic plate that's screwed with a lot of screws of different calibers, and it protects the main components from dust and mechanical stress, and it also locks the top and bottom modules.
You'll need a thin sting screwdriver to twist all the visible screws. Note that the screws can be of different lengths and threads. It's recommended to spread them out in the order they were twisted, or use a circuit so that you don't confuse the attachment points when you build them.
Once the plate is removed, it opens up access to key nodes: the battery, the motherboard and the camera modules, and the first thing you need to do is turn off the battery plume from the motherboard, which is a critical step for the safety of the future.
- 🔋 Carefully bend the battery plume with a plastic tool without using metal objects.
- 📷 Turn off the main and front camera plumes if you plan to replace them or deep cleaning.
- 🔌 Remove the connectors of the display module, pre-screwing the fixing metal brackets.
- 📡 Disconnect the Wi-Fi antenna cables and GSM, If they interfere with access to the right sites.
When working with connectors, it is important to be careful: the plumes in Xiaomi are quite thin and sensitive to clogs. Use tweezers only for the hard parts of the connector, never pull on the flexible cable itself.
💡
Before you turn off any plume, take a photo of the connection, which will help you remember exactly how it was installed, especially if you change several components at once.
Removal of the battery and replacement of components
The battery in the Redmi Note 7 takes up a significant portion of the internal volume and is glued to the frame of the case with double-sided tape. Over time, the glue loses its properties, but often the battery is held tight enough to require effort to extract.
Under no circumstances do not try to tamper with a metal blade or screwdriver. Puncture of a lithium-polymer battery will lead to an instant fire or explosion, which is dangerous to the health of the master.
For safe extraction, use a special hood with suction cups or carefully poke the battery with a plastic card, pre-drip a little isopropyl alcohol under the edges to dissolve the glue. Move slowly, controlling the deformation of the body of the element.
| Component | Location. | Type of attachment | Risk of damage |
|---|---|---|---|
| Battery | Central lower part | Adhesive tape | High (puncture, bloating) |
| Main camera. | Upper left corner | Glue + Paz | Medium (lens scratches) |
| Lower plume | Bottom of the hull | Screws + Gaps | Low (contact gap) |
| Dynamician | Lower right corner | Glue + screws | Medium (membrane damage) |
When installing a new battery, make sure the contact pad is clean. If the old adhesive layer is left on the frame, it must be carefully removed so that the new element will fall flat and tight.
💡
Safety is paramount: Never use sharp metal tools to extract the battery due to the risk of short circuit and fire.
Replacement of display module and glass
Replacing the screen with the Redmi Note 7 often requires a complete disassembly of the device, as the display frame can be integrated with other elements or require access from the bottom to push. In some cases, the module is changed in assembly with the frame, which makes it easier to do.
If you only change glass (about 30 percent of the time), you need a special separator and laminator, which is a complex process that requires skill. When you replace a module assembled (screen + frame), the process is reduced to transferring internal components from the old frame to the new one.
Carefully transfer the motherboard, speaker, vibrator and plumes to the new frame. Make sure that the speaker grid matches the hole in the body, and all screw holes are combined.
⚠️ Warning: When you install a new display, check it before it's finally assembled and pasted. Connect the plumes, turn on the phone, check the touchscreen and the image. Assembly is done in reverse order. Pay special attention to the stacking of the plumes: They must lie in their channels and not be clamped by a metal plate or screws, and any inflection can cause the sensor or camera to function in an unstable way. 📊 What's most commonly broken in Redmi Note 7?Rear glass Screen (display)Both windows at onceOnly frame Building device and checking the health The final step is assembling all the nodes back into the case. Start by installing the motherboard and connecting all the plumes. Make sure each connector is in the groove before the characteristic click. Do not pull the screws, as the threads in the plastic pillars of the case can easily break, which will lead to the board chatting inside.Be sure to check all the functions: sound, vibration, cameras, proximity and charging sensors before sticking the back cover. If everything works correctly, degrease the perimeter of the case and the new lid with alcohol. 🧹 Carefully remove the remnants of old glue and dust from the frames. 🧴 Apply a new layer of glue B-7000 Or use factory duct tape. 🔩 Evenly press the lid around the perimeter and fix the rubber bands on 15-20 minute. 🔌 After drying the adhesive, wipe the case and check the tightness of the fit. A well-designed replacement of components extends the life of your Xiaomi for years. Remember, accuracy at each stage is the key to successful repairs? No, lithium polymer batteries don't require full discharge, and they're even harmful. The optimal charge level for work is about 40-60%. The main thing is to turn off the board by turning off the battery plume before any manipulations. Can you use regular glue instead of special glue? It's not recommended. Normal adhesives (superglue, moment) can highlight fumes that will spoil the camera and screen, and also not provide the necessary elasticity. Use only the B-7000, T-7000 or special adhes tapes. Why is it not working after assembly? It is likely that the fingerprint is damaged from the plugging of the plug in the plug and the hole in the plug.