Despite their age, the Redmi Note 3 mobile devices remain popular due to their robust metal body and performance. However, time is not spared for electronics: batteries lose capacity, screens break, and charging connectors fail. Owners often face the need for self-intervention to extend the life of the gadget or restore its functionality.
The opening process of this smartphone has its own unique features related to the design of aluminum alloy. Unlike plastic models, it requires a special approach to heat and accuracy when working with latches. Quality preparation of the workplace and the availability of a specialized tool is the foundation of successful repairs, allowing you to avoid damage to internal components.
In this article, we will take a closer look at each step of dismantling, from removing the back cover to fully removing the motherboard. You will learn about hidden screws, the features of turning off the plumes and the nuances of working with the adhesive base of the display.
Workplace preparation and necessary tools
Before you start dismantling, you need to organize the space, you need to work with small electronics, you need good lighting and no static electricity, and you need to use an antistatic mat, or at least a dry, clean surface of the table, covered with cloth without pile.
To do this successfully, you need a specific set of tools, without which you risk breaking the screw thread or damaging the plastic mounting elements, and a heating element (dryer or heating pad) is required to soften the adhesive that holds the display module.
- 🔧 Set of screwdrivers (cross-haired) PH000 Torx T5) — squirt.
- 🌡️ Thermostat or suction cup - for safe lifting of the heated screen.
- 🛠️ Plastic mediators (scapula) - for snapping the body without scratches.
- 🧲 Magnetic mat - for sorting screws, so as not to confuse them when assembling.
Pay special attention to the choice of suction cups. for Xiaomi Redmi Note 3 It's perfect with its smooth glass, but if the screen is already broken, you'll need to use tape to keep the glass from falling inside. 80-90 degrees Celsius, so as not to damage LCD-battery-matrix.
Removal of the back cover and removal of the frames
The design of the Redmi Note 3 (especially the Kenzo version) is unique in that the back cover is a non-removable part of the metal body, but it is not glued. However, to access the insides, you first need to remove the upper and lower decorative plastic inserts.
Start by twisting the two screws at the bottom of the device, on the sides of the USB connector. After removing them, gently tuck the bottom plastic plug with a mediator. Move along the perimeter, snapping hidden clips. A similar procedure is performed with the top, where the camera and speaker are located.
⚠️ Warning: Extremely cautious in the area of the main camera module. The plastic is thin and excessive force can cause the fasteners to crack or break.
When you remove the plastic frames, you'll see the inside of the smartphone, you'll see the motherboard, the metal screen, and the battery, and at this point, it's important not to damage the antenna plumes that can be laid under the decorative elements.
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Photograph the location of the screws before extracting them. In Xiaomi smartphones, the screws can be of different lengths, and installing a long screw in a short hole can break through the motherboard.
Disconnecting the battery and removing protective screens
The first thing you do after you access the insides is to turn off the device, find the battery plume that's connected to the motherboard, gently put the connector in a plastic blade and disconnect it, and then you can continue working, so you can't short circuit.
Then you remove the metal plate that covers the main nodes, and it is fixed by several screws, often hidden under stickers or located in recesses, and use a magnetic screwdriver to avoid dropping the fastener inside the case.
In some versions, additional plumes may be placed under the protective shield, such as button connectors or flash modules. Before removing the metal completely, make sure that all connections are freed.
- 🔋 Disconnect the battery plume first thing for safety.
- 🔩 Unscrew all visible screws from the metal screen.
- 📱 Check for hidden screws under warranty stickers.
Once the protection is removed, you can access the main display and touchscreen connectors, and you can now move on to removing the motherboard itself or disassembling the screen, depending on the purpose of the repair.
☑️ Safe disassembly
Extraction of motherboard
The motherboard in the Redmi Note 3 is tightly secured, and in addition to perimeter screws, it can be fixed in the grooves of the case, and once all the fasteners are unscrewed, the board needs to be slightly raised and gently moved to the side to release from the seats.
Remember to turn off all the remaining plumes: the main display plume, touchscreen plume, button plumes, front camera and speaker. Connectors often have a locking mechanism that you need to bend up before removing the plume.
When you remove the board, look at the main plume that goes to the bottom board (with the charging connector), which can pass under the battery or be glued to it, and sudden movements are not allowed here.
Dismantling of the display module
The hardest part is the separation of the screen. The display in the Xiaomi Redmi Note 3 is glued around the perimeter. This stage requires uniform heating of the front panel. Warm up the edges of the device for 3-5 minutes.
Use a suction cup to create a gap between the glass and the frame, and insert a thin mediator into the gap. Drive the tool along the perimeter, cutting the adhesive layer. Move slowly so as not to damage. LCD-matrix, which is located directly under the glass.
⚠️ Warning: If the screen is broken, use transparent tape, pasting it cross-patched on the front part, which will prevent fragments from crumbled and allow the suction cup to stay on the surface.
Once the module is separated from the frame, it can be removed. At this stage, often replace the glass (special equipment is required) or change the module entirely. When installing a new module, be sure to apply a new layer of glue B-7000 or use a special adhesive tape.
What to do if the screen does not unplug?
Battery replacement and device assembly
The battery in this model is also attached to double-sided tape, which you can use a plastic card or a special lever to extract, and you need to peel the battery from the opposite side of the plume, trying not to damage the cell itself.
When installing a new battery, make sure that the contact pad on the lower board is clean. If you have changed the screen, transfer all the elements (speaker, vibrator, plumes) from the old module to the new one.
It is important to properly lay all the plumes so that they are not clamped when the case is closed. After assembly, but before twisting the screws, it is recommended to connect the battery and check the performance of the touchscreen and images.
| Component | Type of attachment | Tool. | Difficulty |
|---|---|---|---|
| Back cover. | Latchers | Mediator. | Low. |
| Screen. | Glue + screws | Fryer, sucker. | Tall. |
| Battery | Double-sided scotch | Plastic spatula | Medium |
| Maternity fee | Screws + plumes | Screwdriver PH000 | Medium |
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The main difficulty of dismantling Redmi Note 3 is the abundant use of glue for the display and neat work with thin metal frames that are easily deformed.