How to disassemble the Xiaomi Redmi Note 7 phone: a step-by-step guide

Xiaomi Redmi Note 7 has established itself as one of the most reliable smartphones in its price segment, but even the most durable equipment is not immune to mechanical damage. Broken glass, a failed battery or a faulty microphone are common reasons why owners think about self-repair. The process of dismantling this device requires not only accuracy, but also an understanding of the internal architecture of the gadget.

Before you start physical intervention, you need to realize that disassembling the Xiaomi Redmi Note 7 is an irreversible process in the context of factory moisture protection and the tightness of the case. The adhesive properties of the factory gaskets are lost after opening, so you will need a quality adhesive composition of the B-7000 or T-7000 for reverse assembly.

In this article, we will take a detailed look at each step of the work, from the preparation of the workplace to the final connection of components, you will learn what tools are really necessary and what you can do without, and how to avoid common errors leading to device failure.

Tools and workplace preparation required

Preparing for repairs is essential to the success and safety of the procedure, and you need to have a well-lit workplace with a flat surface, preferably covered with an antistatic mat or at least a clean fabric, so that the small screws don't get lost. The absence of dust and static electricity is critical to the safety of the chips.

To work with the Redmi Note 7, you will need a specific toolkit that differs from the standard set for older models due to the design of the case, the main tool will be a suction cup for neatly peeling off the back cover and a set of precision screwdrivers, in particular the cross PH000 and flat blade.

Don't forget to also prepare a screw sorting tank, as the smartphone uses fasteners of different lengths. Using an inappropriate screw can cause a motherboard to break down or damage the threads in the plastic racks of the case. It is also recommended to have isopropyl alcohol on hand to clean contacts and remove residues of old glue.

Removal of the back cover and removal of protective panels

The first and most important step is to safely remove the back glass panel, which in the Xiaomi Redmi Note 7 is glued around the perimeter. To do this, you need to warm the perimeter of the body with a hair dryer at a temperature of about 80-90 degrees Celsius for 2-3 minutes, which will soften the adhesive layer. Do not hold the hair dryer too close so as not to overheat the matrix or battery.

After warming up, place the suction cup at the bottom of the back cover, closer to the logo, and pull up slightly, creating a small gap. In the resulting gap, carefully insert a plastic blade or mediator and carry it along the faces, cutting the glue layer, trying not to damage the plume of the fingerprint scanner, which is located at the bottom.

⚠️ Warning: Redmi Note 7's back cover is made of glass and breaks under excessive pressure.The movements must be smooth, without jerking, especially in the corners of the device.

Once you successfully remove the lid, you will see the bottom protective panel covering the battery and the bottom board, which is fixed by several screws that need to be unscrewed, and underneath this panel is a plume of the main module, which also requires careful handling when you turn off.

Battery Disconnection and Component Dismantlement

Once you have access to the insides of the device, the first thing you need to do is disconnect the battery from the motherboard, a critical electrical safety rule that prevents the power controller from shorting and possibly failing in case of accidental contact of the tools with the board.

To turn off, gently lift the battery plume connector with a plastic blade or nail, moving from edge to center. Don't pull the plume itself, as it may break. After de-energization, you can start removing other components, such as the main and front cameras, as well as the vibration motor module.

The main camera in the Redmi Note 7 is located in the upper left corner and is fixed by a screw. Before removing the camera module, make sure you remember the position of the plume so that when assembled, you do not damage it. The main camera module is quite sensitive to static and mechanical damage to the lens.

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Always disconnect the battery before disconnecting any plume. Even short-term circuits under voltage can burn expensive board components.

Replacement of the screen and work with the display module

Replacing a broken screen is one of the most difficult operations, since in the Xiaomi Redmi Note 7, the display module is often assembled with a frame, but can also be supplied separately. If you change only glass or a touchscreen without a frame, you will need to carefully glue components from the old module to a new one, which involves working with aggressive adhesive solvents.

When installing a new module, make sure all connectors sit tightly in their connectors on the motherboard.The display plume and touchscreen plume are connected side by side, and they are easy to confuse or not press until the click. Once connected, check the performance of the image and sensor response before final assembly of the case.

Importantly, screen quality can vary depending on the maker of the copy or the original part. Original matrixes have better viewing angles and color reproduction, whereas cheap counterparts can consume more power or have backlashes.

Removal of the battery and replacement of the batteries

The battery in the Redmi Note 7 is glued to the body firmly enough, and its removal requires special care. Under no circumstances do not try to tamper with the battery with metal tools or screwdrivers, as a puncture of the lithium polymer cell can lead to fire or explosion.

For safe extraction, use special plastic cards or pulling strips (if provided by the design of a particular batch), preheating the back of the device. If the battery is swollen, you need to work with it as carefully as possible, avoiding any pressure on its surface.

When installing a new battery, make sure that the contact area on the plume is clean and not oxidized. After connecting a new battery, do not rush to close the case - first connect the charger and check whether the charge is coming, as well as whether the percentage of charge in the system is correctly displayed.

⚠️ Warning: If the battery is too inflated, do not put it on the table and do not leave it unattended. Place it in a non-combustible container and dispose of it at a specialized battery reception point.

Assembly of the device and verification of functionality

The final stage is reverse assembly, which requires attention to detail. Make sure all screws are returned to their places, especially those that are of different lengths, as screwing a long screw into a short hole can punch through the board. Check the connection of all the plumes: the main, display, cameras and buttons.

Before applying the new adhesive, wipe the surfaces of the body and back cover with alcohol, removing all residues of the old adhesive. Apply the B-7000 adhesive with a thin layer around the perimeter, avoiding hitting the cameras, speakers and charging connectors. Once the parts of the case are connected, lock the smartphone with rubber rings or a 15-20 minute load for polymerization.

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The build quality directly affects moisture protection and durability. Don't skimp on glue and drying time to keep the smartphone lasting.

Once assembled, turn the device on and perform a full diagnostic: check the sensor (multi-touch), speakers, microphone, vibration response and communication modules. If all functions are working correctly, the repair can be considered successful.

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