Disassembly Xiaomi Redmi Note 3 Pro: a complete guide with photos and tips

Xiaomi Redmi Note 3 Pro

In this article, you will find a step-by-step guide with photos of key stages, a list of tools you need, and unique tips to help avoid typical errors. We will also tell you which parts of the Redmi Note 3 Pro often fail and how to diagnose them before disassembly.

⚠️ Warning: Disassembling your smartphone will void the warranty (if it is still valid) and can cause permanent damage if you do not do the right thing.

Before starting work, be sure to turn off the device and remove SIM-You need to work on a clean, flat surface with good lighting, and that minimizes the risk of losing small parts.

Training: tools and materials

To disassemble the Xiaomi Redmi Note 3 Pro, you will need a specialized set of tools. Do not try to do with improvised means (knives, screwdrivers of the wrong size) – this is almost guaranteed to damage the body or internal components.

• 🔧 Plastic blades (2-3 (a) - for the careful liding and disconnection of the plumes.
• 🔨 The screwdriver. PH00 — for shell screws (normal) PH0 won't fit!).
• 🧲 Magnetic mat or screw container – to avoid losing small details.
• 🔥 Hair dryer or thermal air station - to soften the glue under the back cover (optional, but recommended).
• 📸 Smartphone for photography – capture each step so as not to confuse the order of the assembly.

Also prepare isopropyl alcohol (90%+) for cleaning contacts and thin gloves – they will protect your hands from sharp elements of the body and prevent fatty traces on the internal parts.

Critical: the screws in the Redmi Note 3 Pro are of different lengths (3 mm and 4 mm). If you confuse them during assembly, you risk damaging the motherboard! We recommend spreading them in groups on a magnetic mat with marks.

Removal of the back cover: safety

The Redmi Note 3 Pro's back cover is glued around the perimeter, but it also holds on the latches, and the main mistake of the newcomers is trying to tamper with a knife from the corner, which leads to cracks in plastic or damage to the antenna contacts under the lid.

Algorithm of action:

1. Heat the hair dryer of the edge of the cover (temperature ~60°C) for 1-2 minutes to soften the glue.
2. Insert a plastic blade into the gap between the lid and the body at the charging connector (there is less glue).
3. Carefully drive the shoulder blade along the body, alternately snapping the clamps.

If the lid doesn't respond, don't increase the heat -- you'd better do it the other way around, and if you do it right, it'll come off with a characteristic snap of the latches.

Heat the edges with a hairdryer (60°C) | Use only a plastic blade | Start with a charging connector | Do not force the center of the cover-->

⚠️ Attention: There are flexible antenna contacts under the lid, and if you break them, the Wi-Fi and cellular signal will deteriorate. When you lift the lid, hold it by the edges, don't pull it up!

3. Battery disconnection: why you should do it first

When you take the lid off, the first thing you'll see is a battery with a black insulation film, and many people skip this step and try to unscrew the motherboard right away, but that's a big mistake. The battery is connected to the board, and if you accidentally close the contacts (like a screwdriver), you can:

• ⚡ Short circuit with damage to the power controller.
• 🔥 Battery fire (rarely, but possible with severe CK).
• 💥 The exit USB-port or charger.

To disconnect the battery:

1. Put a plastic blade on the black connector (it is under a white sticker with a warning).
2. Carefully pull the connector up - it should come out effortlessly.
3. Close the connector with a tape so that you do not accidentally connect it back during operation.

Now you can safely proceed to further disassembly. If you are planning to replace the battery, it is glued to double-sided tape. Use isopropyl alcohol and a plastic card to remove it (metal tools will pierce the battery!).

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If the battery is swelling, don't try to puncture it! Place the smartphone in a sealed container and take it to a recycling point. Bloated batteries can spontaneously ignite.

4. Dismantling of motherboard: screws and traps

The Redmi Note 3 Pro motherboard is mounted on 11 screws of varying lengths, and their location and length are shown in the table below:

Before you unscrew the screws, take a picture of their location.

1. Disconnect all the plumes: the display, touchpad, cameras and home buttons (it is combined with a fingerprint scanner).
2. Unscrew the screws in the order "from edges to center" so as not to deform the board.
3. Carefully raise the cost of edges, starting from the side USB-port.

⚠️ Beginner's Trap: There's a plume of a vibrating motor under the board. If you pull the board abruptly, it'll break. Before you lift it, make sure all the plumes are disconnected!

5. Screen disassembly and display replacement

The screen Redmi Note 3 Pro consists of three layers: protective glass, touch panel and AMOLED-When the top layer (cracks, scratches) is damaged, the entire module is often replaced, because the sensor and matrix are glued together.

To dismantle the screen:

1. Heat the display edge (70°C) with a hairdryer for 3-5 minutes.
2. Put a plastic spatula on the corner where the front camera is located.
3. Carefully drive the shoulder blade along the edge, separating the adhesive base.
4. Disconnect the display and sensor plumes from the motherboard.

When installing a new screen:

• 🔹 Use a new two-way Scotch (for example, 3M 9448A).
• 🔹 Check the sensor before final assembly – sometimes you need to reconnect the plume.
• 🔹 Do not turn on your smartphone without a connected battery – it can burn the backlight controller!

The cost of the original display module for the Redmi Note 3 Pro — from 2500 to 4000 rubles (2026). Chinese counterparts are cheaper (1200-1800 rubles), but often have problems with color reproduction and sensor sensitivity.

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When changing the screen, always test the new module before applying the glue, and if the matrix is defective, it will not be possible to return it after installation.

Typical malfunctions and their diagnosis

If you're looking at the Redmi Note 3 Pro for repair, first identify the symptoms of the malfunction, and here's a table of the most common problems and their likely causes:

For diagnosis, use:

• 🔍 Lupu - to inspect the chips for burning.
• 📊 Multimeter – check the voltage on the battery (normal: 3.7–4.2V).
• 💻 USB-debugger ADB) — sensor-check.

If the problem is with the software (hangs, reboots), try flashing the device through Fastboot before you physically repair it. The firmware instructions for the Redmi Note 3 Pro (codenamed kenzo) are available on the 4PDA forum.

7.Assembly: How to Avoid Mistakes

Assembling Xiaomi Redmi Note 3 Pro should be in reverse order, but taking into account several nuances:

• 🔄 Connect the plumes last so as not to hook them when installing the board.
• 🔋 Connect the battery only after full assembly - this will eliminate short circuit.
• 📏 Screw the screws cross-cross so that the board sits flat.

After assembly:

1. Check the operation of all buttons and sensors.
2. Connect charging – if the smartphone does not turn on, check the battery connection.
3. Make sure there are no backlashes of the body (this is a sign of improperly installed latches).

⚠️ Note: If after the assembly stopped working speakers or microphone, most likely you forgot to connect the child board (it is located separately from the main and is responsible for audio.

If everything is working properly, put a new protective film on the back cover (it is sold in repair kits), which will restore the tightness and protect against dust.

FAQ: Answers to Frequent Questions