Disassembly Xiaomi Redmi Note 7: a detailed guide with photos and tips

Xiaomi Redmi Note 7 is one of the most popular models of 2019, but even such a reliable device needs repair over time. Whether it is replacing a broken screen, a bloated battery or a faulty speaker, disassembling the phone is inevitable. However, the design of the Redmi Note 7 has its own features: glued body, fragile plumes and the risk of damage to the glass rear panel. In this article, you will find a step-by-step instruction with photos of key steps, a list of necessary tools and unique tips for disassembly without damage that you will not find in standard manuals.

It's important to understand that disassembling a Xiaomi smartphone voids the warranty (if it's still valid) and requires care. For example, the fingerprint scanner plume on this model is attached to the middle frame and easily breaks when you walk carelessly. We'll tell you how to avoid typical mistakes, such as why you can't start disassembling the back cover from the bottom edge (there are antenna contacts) and how to properly detach the battery so as not to burn the motherboard. If you've never taken your smartphones apart before, this guide will help you do everything as safely as possible.

Preparation for disassembly: tools and precautions

Before you start, you can assemble a complete set of tools, and without them, the Redmi Note 7 will be a high-risk torment.

• 🔧 Plastic blades (2-3 pieces, 0.2-0.4 mm thick) - for putting the cover and disconnecting the plumes.
• 🔥 Dryer or thermo-air station (power of at least 800 W) - for softening the glue.
• 🔩 Screwdriver. T3 and T5 (magnetic, with a short sting) - for screws fastening the board and screen.
• 🧲 Magnetic mat or organizer - so as not to lose small parts (screws, gaskets).
• 🔋 Suction cups (2 pcs) - for careful removal of the back cover after heating.
• 🧴 Isopropyl alcohol (90%+) — glue-cleaner.
• 📏 Plastic tweezers - for working with plumes and small connectors.

Pay special attention to the temperature regime when the case is heated. The optimal temperature for softening the adhesive is 70-80 ° C. Exceeding 90 ° C can damage the screen or battery! Heat the lid evenly, driving the hairdryer in a circle for 2-3 minutes. Do not direct hot air to the camera or speaker - their plastic elements can deform.

⚠️ Warning: If you're disassembling a Redmi Note 7 with a broken screen, seal it with tape (in multiple layers) to prevent shards of glass from entering the body and damaging your hands.

Disassembly scheme Xiaomi Redmi Note 7: step-by-step guide

Start with power cut and retrieval SIM-And then we follow a very strict sequence, which is that if you break it, you can break the plumes or damage the flexible boards:

1. Heat the back cover. Set the hair dryer temperature to 75°C and warm the back evenly for 2-3 minutes. Start at the edges, gradually moving to the center. The glue under the Xiaomi logo holds stronger — give this space extra time.
2. Suck the lid. Suck the lid to the top left corner (near the camera) and pull it carefully. Once the slit appears, insert a plastic spatula. Don't try to rip the lid off sharply, it will lead to cracks!
3. The plumes are disconnected. Once the lid is removed, you'll see 3 plumes: fingerprint scanner, antenna and main (to the motherboard) that need to be disconnected in strict order: 📱 First - the fingerprint scanner plume (attached by a latch, rises upwards). 📶 Then - the antenna plume (carefully tuck it with a spatula on the side). 🖥️ Last of all - the main battery plume (it is glued, pull the tongue).

Now we can start removing the battery. It's glued to the body, so you'll need to reheat (now the mid-frame) and tidy it with a plastic card. Don't use metal tools, they can puncture the battery and cause a fire!

All plumes disabled |Shot screw locations photographed |Battery removed or disconnected |Play cleaned of dust with dry brush-->

Common Mistakes in Disassembly and How to Avoid Them

Even experienced craftsmen sometimes make mistakes that lead to additional costs, and here are the most common mistakes and ways to prevent them:

The fingerprint scanner plume is particularly noteworthy, and on the Redmi Note 7, it's attached to the middle bezel and has a fragile connector. Many artisans accidentally snap it off by pulling the lid. To avoid this, after heating, gently lift the lid only in the area of the camera, then unplug the scanner plume and only then remove the panel completely.

⚠️ Warning: If your smartphone stops turning on after you disassemble, check the contacts of the battery on the board. Often they become oxidized or contaminated. Clean them with alcohol and a soft brush.

Replacement of the battery: nuances and recommendations

The Redmi Note 7 battery (the BM47 or DM-BM40) is one of the most vulnerable parts of the device, and after 2-3 years of use, it often inflates, causing the screen to detach or damage to the motherboard.

• 🔋 Turn off the battery plume first thing after removing the lid. Even if the smartphone is off, the residual charge can cause a short circuit.
• 🔥 Heat the battery to 60-70°The glue underneath is very sticky, and without heating, you risk breaking the battery.
• 🧴 Use isopropyl alcohol to remove glue residues. It does not conduct current and is safe for electronics.
• 🔧 Check the new battery before installing.The original battery should have a Xiaomi hologram and markings on it. 4000mAh 3.85V.

When installing a new battery, apply a thin layer of glue B-7000 perimeter, but avoid the area NFC-After the replacement, be sure to calibrate the battery: fully charge the smartphone, then discharge until automatically switched off and recharge 100.

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If the battery is replaced, check the energy consumption in the settings (Settings → Battery → Battery Use). Often, poor software or background processes are to blame, not the battery itself.

Disassembly of the screen and replacement of the display

The Redmi Note 7 screen (JDI NT36672A or BOE NT36672) is glued to a midframe around the perimeter, and its plume runs under the battery, which makes it difficult to replace, but following the instructions, you can do this:

1. Turn off the battery plume and remove the battery (as described above).
2. Heat the screen around the perimeter to 70°C, paying special attention to the corners.
3. Subdense the display with a plastic spatula, starting from the lower right corner (there are fewer plumes).
4. Disconnect the screen plume - it is attached with a latch, which must be lifted up.
5. Check the new screen before installing. The original module must have Original for Xiaomi marking and serial number.

When you install a new screen, look at the edge pads, which provide a uniform press and protect against dust. If the pads are damaged, replace them with new ones (article MDY10-E-18A). After assembly, check the proximity and autobrightness sensor, which often get lost when you replace the display.

⚠️ Attention: If vertical stripes or flicker appear after changing the screen, check the density of the plume. Often the problem is solved by reconnecting the connector.

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When changing your screen to a Redmi Note 7, be sure to transfer the old light-shielding grid (if it is intact) and gaskets to the new module.

Build a smartphone: reverse sequence and testing

The Redmi Note 7 should be assembled in reverse order, but with a few nuances in mind:

• 🔩 Screw the screws cross-cross to avoid skewing the middle frame.
• 🧲 Plug in last, starting with the battery, then the screen, antenna and fingerprint scanner.
• 🔋 Press the battery evenly, without distortions, so as not to damage the contacts.
• 📱 Stick the back cover, starting from the upper edge, gradually pressing to the frame.

After assembly, be sure to conduct testing:

1. Check the operation of all buttons (Power, Volume).
2. Make sure the screen sensor responds to touches around the perimeter.
3. Test the cameras (main and front), speakers and microphone.
4. Connect the charger and check the battery indication.
5. Activate the NFC and fingerprint scanner (if you have been replaced).

If something doesn’t work, take the smartphone apart again and check:

• The density of the plumes fit (often they are not fully inserted into the connectors).
• Integrity of contacts on the motherboard (oxidation or pollution).
• Correct installation of screws (skews can put pressure on the board).

Where to buy parts for Redmi Note 7 and how to avoid fakes

When buying parts for Redmi Note 7, it is easy to run into low-quality counterparts.

Before buying, check the reviews of the seller and request a photo of the part marked. Original parts are usually packaged in Xiaomi branded packages with a hologram. If the price is too low (for example, a screen over 2000). ₽ instead of 4500-6000 ₽), It's a sure sign of a fake.

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When buying a battery, pay attention to the date of production (indicated on the label).The optimal age of the battery is not more than 6 months from the date of manufacture.

FAQ: Frequent questions about the Redmi Note 7 disassembly