How to disassemble the Xiaomi Redmi 7 phone: the full guide

Modern smartphones, including popular models of the budget segment from Xiaomi, require careful handling, but even with careful operation, there are situations when you need access to the internal components of the device. Disassembly of Redmi 7 may be required to replace a broken display module, install a new battery or clean the speaker from dust. It is important to understand that opening the case is a process that requires not only the right tools, but also a certain amount of caution to avoid damaging fragile plumes.

Before you start dismantling, you need to assess the risks and make sure you have minimal electronics skills.The interior of the smartphone is dense enough, and the fasteners can differ in length and type of thread. Incorrect assembly can lead to short circuit or mechanical damage to the board, so following the instructions is critical to successfully complete the procedure.

In this article, we will take a detailed look at each step of the Xiaomi Redmi 7 disassembly, from spinning the screws to turning off the plumes. We will focus on the specific nuances of the design of this model, such as the location of the sensors and the features of the rear lid mounting. Carefully study the material before starting work to avoid common errors.

Preparation of the workplace and necessary tools

The quality of the workspace is the key to the successful disassembly of any equipment. You need a smooth, well-lit surface, preferably with antistatic coating or just a clean desk without a pile. First of all, turn off your smartphone completely and remove the tray for the first time. SIM-cards and memory cards to avoid accidentally turning on or damaging contacts during operation.

To manipulate the Redmi 7, you will need a specialized toolkit that can be purchased from electronics stores. Using inappropriate items such as knives or pins significantly increases the risk of damage to the body and internal components.

• 🔧 Precision screwdrivers (cross-haired) PH000 and flat) - the main tool for screws.
• 🔥 Dryer or thermophen - necessary to soften the glue under the back cover.
• 💳 Plastic card or mediator – for safe slashing of the case.
• 🧲 Magnetic mat or container with cells - for sorting screws by stages.

Pay special attention to the organization of screws. Xiaomi Redmi 7 uses screws of different lengths for different nodes, and if you confuse them during the assembly, you can damage the thread or pierce the board with a long screw. It is recommended to use the method of "blind copying": laying out the removed parts in the order of their dismantling, you can easily assemble the device back.

Removal of the back cover and primary access to components

The Redmi 7 design involves mounting the rear panel on a two-part glue and screws under plugs. Heating is a must, as trying to remove the cold cover will lead to its cracking. Heat the perimeter of the device with a hairdryer for 2-3 minutes, constantly moving the air flow so as not to overheat the display matrix or battery.

⚠️ Warning: Do not heat the device to a temperature that cannot be tolerated with your fingers (above) 60-70 Excessive heating can swell the battery or damage the adhesive frames of the display.

After warming up, insert the suction cup at the bottom of the back cover, pull up slightly to create a gap, and gently insert the mediator. Drive the instrument along the perimeter, cutting the adhesive layer. Do not immerse the mediator too deeply to avoid hitting the plumes coming from the buttons or fingerprint sensors if it is connected to the cover (in this model, the scanner is usually on the plume going to the board).

When the lid is removed, you see the internal structure of the smartphone, and immediately notice the location of the main nodes: the motherboard is covered with a plastic lining, and the battery takes up most of the space, and at this point it is important not to put physical effort on the plumes.

Dismantling of protective plastic lining and disconnection of plumes

The Xiaomi Redmi 7 motherboard is protected by a black plastic pad that is mounted with a variety of perimeter screws. Use a thin cross screwdriver to remove it. The screws can be hidden under stickers or in recesses, so inspect the surface carefully.

Once the lining is removed, you can access the main connectors, and the first thing you need to do is turn off the battery to shut down the system and avoid short circuits when working with other components, and the battery plume is connected to the bottom edge of the board and is fixed by a metal clipplate.

• 🔌 Unscrew the screws fixing metal plates over the connectors of the display and touch screen.
• 🔋 Carefully disconnect the battery plume, undercutting it with a plastic blade from the bottom up.
• 📱 Remove the display and touchscreen plumes using the same gently snapping method.
• 📷 Turn off the main and front camera plume if you need to replace them.

When working with connectors, it is important to observe safety precautions: do not press on the board itself, rely on the tool against a metal screen or special areas near the connector. Fragile contacts easily break with careless handling, which will require replacing the entire module or complex repairs on a micro solder.

Extraction of the motherboard and auxiliary modules

To fully remove the motherboard, it is necessary to free it from all mounts and antenna cables. In Redmi 7, an antenna cable (coaxial wire) often passes through special channels in the case and is connected to the board by snapping connectors.

Remove the main camera module, which is usually mounted with a single screw or inserted into the groove. Be careful with the lens - do not touch the lens with your fingers, as fat marks are difficult to remove. Also at this stage, the conversation speaker and the button plume are removed if they interfere with the removal of the board.

Once all the plumes are turned off and the screws removed, the board should come out of the case freely. If it's stuck, don't pull, check if you forgot to unscrew any screw or snap the antenna connector. The circuit board is the most expensive and complex element that requires maximum accuracy.

Replacement of the battery and work with adhesive bases

The battery in Xiaomi Redmi 7 is mounted on two strips of glue. It is strictly forbidden to use metal tools to extract it that can pierce the lithium polymer cell and cause a fire. The best way is to heat the back of the device (if the battery is still inside) or use a plastic card and isopropyl alcohol.

Apply a little alcohol (don't pour directly on the board!) around the battery perimeter, wait a couple of minutes for the solvent to penetrate the glue, and gently shift the battery with the card.If you install a new battery, be sure to use a new adhesive base (B-7000 or ready-made double-sided tapes) so that the battery doesn't hang around inside the case.

⚠️ Warning: If the battery is swelling, do not press it or try to pierce it. Remove it as carefully as possible, observing fire safety, and dispose of it at a special reception point.

When installing a new battery, make sure that the connector plume is not clamped and lies flat. Once connected, check the smartphone's response to charging before final assembly of the case, which will save time in the event of a new battery failure.

Assembly of the device and final performance check

The Redmi 7 is assembled in reverse sequence. Set the motherboard, plug all the plumes before you click. Pay special attention to the touchscreen plume and the display, they must sit tight. Twisted all the screws, but don't drag them over so as not to break the thread in the plastic pillars of the case.

Before you stick the back cover, make sure you test it. Connect the battery, press the power button, and make sure the phone boots up, the sound, vibration, touchscreen and cameras are working. If everything is working correctly, you can apply a new glue and fix the cover.

To fix the lid, use a special electronics glue (e.g., B-7000) or a pre-made adhesive frame. Apply a thin layer of glue around the perimeter, press the lid and lock the device with rubber bands for 15-20 minutes before initial grasp. Remove the excess glue immediately until it has frozen.

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Use rubber harnesses or stationery gums to tightly press the lid against the body while the glue is drying, but do not tug over to avoid damaging the display glass.

Frequently Asked Questions (FAQ)

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The main key to success is not to rush when disconnecting the plumes and carefully monitor the length of the screws during assembly.