How to open Redmi 8: a guide to disassembling the body

Xiaomi smartphones have proven to be reliable and affordable, but even they are not immune to mechanical damage or failure of internal components. The Redmi 8 model, released in 2019, remains popular due to its autonomy and strength, but from time to time there is a need to get to the “innards” of the device.

The process of opening this device is not trivial, because the manufacturer has applied adhesive design around the perimeter of the back cover, which provides protection against dust and splashes, but greatly complicates access to the motherboard. Non-collectible design involves the use of special solvents and tools to safely separate parts without damaging them. If you have never before encountered electronics repair, it is important to be aware of the risks associated with damage to the plumes and battery.

In this guide, we will discuss in detail all the stages of preparation and direct opening of the case. You will learn about the necessary tools, precautions and sequence of actions that will minimize the risk of failure. A competent approach to disassembling a smartphone is the key to successful repair and extension of the life of your gadget.

Preparation of the workplace and necessary tools

Before you start working, you need to organize a comfortable and well-lit workplace, light should fall evenly, without creating glare on the glossy surfaces of the phone, so you can see small screws and plumes. There should be no extra objects, dust or pile on the table, as they can get inside the case and cause a short circuit.

The quality of the toolkit is directly related to the success of the operation: Cheap screwdrivers can lick the screw heads, and metal blades can damage plastic latches. To work, you will need a set of precision screwdrivers, including cross nozzles of the size of PH00 and PH000, as well as hexagons, if they are required for specific screws.

Special attention should be paid to tools for working with the adhesive layer. The Redmi 8 back panel is glued tightly, and without heating it is almost impossible to open, you will need a hair dryer (better a building with temperature control, but also a powerful household) or a special heating pad for separation of displays. Also, you can not do without a suction cup, a thin mediator blade and a plastic card.

• 🛠️ Precision screwdriver set (PH00, PH000) and antistatic-coated tweezers.
• 🔥 Source of heating: building hair dryer, household hair dryer or thermal heating heater.
• 🧤 Suction cup for lifting the cover and thin plastic mediators (scapula).
• 🧴 Isopropyl alcohol or special solvent of glue B-7000.

Don't forget to prepare the screw folding container. The best way to do this is to use a magnetic mat or a cell container, marking each unscrewing step, and this will help you avoid confusing screws of different lengths when you reverse assemble, which is critical to the integrity of the case.

Security measures and disconnection of power of the device

Safety is not just a formality, but a necessity dictated by the physical and chemical properties of the components of a smartphone. The Lithium-ion battery installed in the Redmi 8 can catch fire or explode if damaged. So the first rule is: never open the device if the battery has bloated or visible damage to the body.

⚠️ Warning: Before starting any work, be sure to turn off the smartphone. Attempting to disconnect the battery plume when the device is on can lead to the combustion of the power controller on the motherboard.

The second aspect of safety is working with heating appliances. When heating the back cover with a hairdryer, it is important not to overheat the battery itself or the display. The optimal temperature for softening the adhesive is about 80-90 degrees Celsius. Keep the hairdryer 3-5 cm from the surface and constantly move the flow of hot air around the perimeter, avoiding local overheating at one point.

Static electricity is also worth taking care of. Although modern smartphones have some protection, a discharge of statics from your body can damage sensitive electronics. It is recommended to use an antistatic bracelet or periodically touch a grounded metal object before touching internal components.

The process of heating and separation of the back cover

The most difficult step, which requires patience and accuracy, is the separation of the rear glass panel. The design of Redmi 8 involves tight fitting of glass to the frame around the perimeter. Start by carefully warming the edges of the device. Turn on the hair dryer and warm the perimeter evenly for 2-3 minutes, periodically checking the temperature with your hand (the cover should become hot, but not burning).

After warming up, place the suction cup at the bottom of the back cover, closer to the logo, but not at the very edge. Pull the suction cup up slightly, creating tension, and insert a thin plastic card or mediator into the resulting gap. Do not use metal tools at this stage, as the glass may crack from point pressure.

Move the mediator along the perimeter, cutting the adhesive layer. The movements should be sliding, parallel to the plane of the smartphone. If you feel strong resistance, stop pulling and warm up the area again. The adhesive layer hardens again when cooled, so you need to act quickly, but without jerking.

Pay special attention to the areas around the camera module and the fingerprint scanner, where the glass is thinner and the risk of damage to the internal components is higher, if the lid does not respond, maybe the glue did not warm up to the end, or you missed the area with a denser application of the adhesive.

Dismantling internal components and access to the battery

When you successfully remove the back cover, you'll see the inside of your smartphone, and you'll immediately notice a plastic protective plate that covers the top of the body, where the main nodes are located, and it's secured with a few screws that you need to unscrew. 10-12 They can be of different lengths, so remember which screw is twisted from where.

Removing the plastic pad, you will have access to the motherboard, the main camera module and the battery plume. The battery in Redmi 8 is located at the bottom and closed with a separate metal or plastic plate, which is also screwed. To replace the battery or access the bottom plumes, this protection also needs to be dismantled.

First, disconnect the battery plume from the motherboard. Use a plastic blade or nail, gently putting the connector upwards. Do not use metal tools to turn off the plumes, so as not to close contacts. After the power is turned off, you can safely unscrew the screws that hold the board and remove it to replace the connectors or clean.

Removing the battery itself, which is attached to the double-sided tape, requires reheating the bottom of the case, putting the battery on a plastic card from one edge, and slowly unwinding it, gradually moving inwards, and sudden movements can cause the cell to deform, which is strictly forbidden.

Replacement of the display module and work with the frame

If your goal was to replace a broken screen, the Redmi 8's opening process has its own characteristics: the display module is attached to a plastic frame, which in turn is glued into the case. It is often easier and safer to replace a module assembled with a frame than to try to glue the glass to the old frame at home.

To remove the display, you need to unscrew all the screws around the perimeter of the plastic frame. 15-20 And once you've twisted the screws, you need to carefully separate the frame from the body, and you need to put it around the perimeter, and then again, heating will help, because the frame is also planted on glue.

The display plume passes under the battery or through special channels in the case. Be extremely careful when pulling it out. The new module is recommended to check for performance before installation, simply by connecting the plumes and turning on the phone without permanently gluing it, which will avoid re-disassembly in the event of a marriage.

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Use isopropyl alcohol to remove the residue of old glue, which evaporates quickly and does not conduct current, which is safe for electronics.

When you install a new screen, make sure all sealing gums are in place. They protect the speaker and microphone from dust and moisture. If the seals are lost, you can use thin strips of special sealant, but this is less reliable.

Assembly of the device and checking leakage

The Redmi 8 is assembled in reverse order, but with the introduction of new adhesive layers. You can not use the old adhesive, because it has lost its properties. To fix the back cover and display module, use a special adhesive B-7000 or T-7000, or ready-made adhesive tapes cut along the outline.

Apply a thin layer of glue to the low-fat frame. The glue that you press on the lid must be removed immediately before it freezes. After applying the glue, assemble the device, twist all the screws and tightly press the edges of the case. For better fixation, you can use stationery gums, wrapping them around the phone for 1-2 hours.

After assembly, be sure to check the operability of all functions: touchscreen, cameras, speakers, microphone, vibrator and fingerprint scanner. Make sure the smartphone sees SIM-If everything works correctly, it means that the repair process has been successfully completed.

⚠️ Warning: Do not turn on the phone to charge immediately after assembly if you have used liquid glue.Let it dry completely within the recommended time (usually). 12-24 hours) so that the adhesive vapor does not damage the camera or sensors.

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Quality cleaning of old adhesive layers and degreasing of surfaces is a guarantee that the smartphone will not creak and dust in the future.

Frequently Asked Questions (FAQ)