Disassembly Xiaomi Redmi Note 7: detailed instructions with photos and nuances

Xiaomi Redmi Note 7

self-repair

In this article, you will find detailed instructions for disassembling the Redmi Note 7, taking into account all the technical features of the model, we will tell you what tools you will need, how to remove the back cover correctly without damage, and what to look for when working with internal components. If you have never taken out a smartphone before, take your time: some steps require jewelry accuracy.

⚠️ Important: Disassembling your smartphone will void the warranty (if it's still valid) and can cause permanent damage. If you're not sure about your skills, contact the service center, especially when it comes to replacing your battery: Redmi Note 7 uses battery adhesive fastener, and its improper extraction is fraught with fire.

1. Disassembly preparation: safety tools and measures

Before you start disassembling, make sure you have everything you need. Xiaomi Redmi Note 7 is not the most difficult to repair smartphone, but not the easiest.

• 🔧 Plastic mediators or shoulder blades (2-3 - to separate the back cover. Metal tools can scratch the glass.
• 🔨 Cross screwdriver PH00 — The usual screwdriver won't work, because the screws in the Redmi Note 7 are small and easily torn off.
• 🔥 A hair dryer or a thermo-air station to soften the glue under the back cover. Temperature should not exceed 70.°C, otherwise the screen will be damaged.
• 🧲 A magnetic mat or a container to keep the screws in check. The Redmi Note 7 has 12 of them, all of them of different sizes.
• 🩹 Gloves and safety glasses – the glass cover can crack, and the battery releases caustic substances when damaged.
• 📱 Screen suction cup – will help to gently lift the cover after heating.

Also, prepare the workplace: it should be clean, well-lit and draft-free (dust can get inside the case). SIM-A memory card can interfere with disassembly. If the battery is swelling, don't try to disassemble the phone yourself, because the risk of fire is extremely high.

⚠️ Warning: If you're disassembling the Redmi Note 7 because of charging problems, check the cable and power supply first.In 30% of cases, the phone's "fault" is due to damaged phone USB-port or low-quality charger.

Removal of the back cover: technique and common errors

The back cover of the Xiaomi Redmi Note 7 is glued around the perimeter and is further fixed by latches. Don't try to tear it off by force, it will lead to cracks.

1. Heat the edges of the cover with a hair dryer during 2-3 minutes, keeping him at a distance 5-7 See: Move around the perimeter, paying special attention to the corners.
2. Apply the suction cup to the bottom edge (where the charging connector is) and pull up slightly. If the lid doesn't lend itself, warm up again.
3. Insert a plastic mediator into the gap and carefully guide it along the case, separating the glue. Do not go more than 2 mm deep - there are plumes inside!
4. Once all the edges are separated, remove the lid, and if it doesn't come off, make sure there's no glue left.

Typical Beginner Mistakes:

• 🔥 Overheating – if you hold the hair dryer too close, you can melt plastic latches or damage the screen.
• 🔪 Using a knife – metal scratches glass and can cut plumes.
• ⚡ Disassembly without turning off the battery - a short circuit when touching the motherboard screwdriver will put the phone out of order.

After removing the cover, you will see:

• Battery with plug-in.
• Camera module with three lenses (main, wide-angle, depth sensor).
• A metal plate covering the motherboard.
• Antenna tapes on the sides of the body.

3. Battery disconnection and motherboard retrieval

Before touching the internal components, be sure to turn off the battery.

1. Carefully tuck the battery connector with a plastic spatula and disconnect it from the motherboard.
2. Wait. 1-2 minutes - this will discharge the residual voltage in the capacitors.

Now we can start to extract the motherboard.

1. Unscrew all the screws (there are 12 of them) that fix the metal plate. Remember the location of each screw - they are of different lengths!
2. Remove the plate and put it aside.
3. Disconnect all the plumes connected to the board: Screen plume (the widest, at the top); camera plume (thin, right); switch-on and volume plume (small, left); charging plug plume (bottom).

Carefully tuck the board on one side and pull it out. Don't pull around the corners, because there are fragile components there!

If the board is not taken out, check if the plumes are still connected or if the heat paste is in the way of the processor. The Redmi Note 7 uses double-sided tape to fix the board, so you can sway it slightly from side to side.

⚠️ Warning: If you notice traces of oxidation on the board (green or white coating) is a sign of moisture intake, in which case, before assembly, you must clean the contacts with alcohol and dry the board in rice or silica gel for at least 24 hours.

4. Battery replacement: nuances and risks

The battery in Xiaomi Redmi Note 7 has a capacity of 4000 mAh and soldered to the body with double-sided tape.

• 🔥 Isopropyl alcohol (90%+) — glue-dissolving.
• 🧴 Plastic scraper – to carefully separate the battery.
• 🔋 New battery – original only or certified equivalent (e.g. from Baseus or Remax).

Step-by-step:

1. Apply alcohol to the edge of the battery (don't pour it all!) 1-2 minutes, the glue will soften.
2. Carefully tuck the battery into a plastic scraper and pull it up. If it doesn't lend itself, add alcohol.
3. After extraction, clean the installation site of glue residues with a napkin.
4. Set the new battery up, take the protective film off, press it down and make sure it's flat.
5. Connect the battery connector to the board and check the voltage with a multimeter (should be) ~3.7–4.2).

If the battery is swelling, don't prick it or bend it, because the swelling indicates that the charge controller is not working, and the new battery may be the same as the old one, and this requires a circuit board diagnosis.

Disassembly of the camera module and speakers

If you need to replace your camera or speaker, be careful: these components are attached with fragile plumes.

1. Unscrew two screws that fix the metal frame of the camera.
2. Carefully put the frame on and remove it.
3. Disconnect the camera plume from the motherboard (it is fixed by a latch - lift it up).
4. Remove the module. If you need to replace the camera glass, use a dryer to soften the adhesive.

The speakers in Redmi Note 7 are located:

• 🔊 Lower speaker - under the grille next to the connector USB-C. Fastening on two-way scotch.
• 📞 Top speaker (conversational) - under the screen, glued to the frame.

To replace the lower speaker:

1. Unplug the protective net (it is glue-on, you can put a mediator on it).
2. Unscrew the two screws holding the speaker.
3. Disconnect the plume and remove the module.

⚠️ Attention: If after replacing the speaker the sound became quieter or wheezing appeared, check if the plumes are clamped and if dust does not hit the membrane. In Redmi Note 7, there is often a problem with the oxidation of the speaker contacts due to moisture.

Assembly of the phone: procedure and testing

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

• 🔩 Screw screws – twist them cross-cross to avoid skewing the board.
• 🧩 Trains – only connect them after the full installation of the board, otherwise you can break.
• 🔋 Battery - before connecting, check that it lies flat, without gaps.
• 📱 Back cover - before gluing, clean the edges of the old glue with acetone.

Assembly order:

1. Set the motherboard and fix it with screws.
2. Connect all the plumes (start with the screen, then the camera, buttons, charging connector).
3. Set the battery and connect it to the connector.
4. Close with a metal plate and twist the screws.
5. Apply a new glue to the back cover (for example, B-7000) And you can press it down. Use rods or heavy books for reliability.

After assembly, be sure to test the phone:

• 🔋 Check charging (plug the cable and make sure it's charging).
• 📷 Test all cameras (main, wide-angle, front-facing).
• 🔊 Turn on the music and call – both speakers should work.
• 📶 Make sure you catch the network and Wi-Fi is running.

If something doesn't work, take the phone apart again and check the plumes are connected, and 90 percent of the time, the problem is poor contact.

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After assembly, do not turn on the phone immediately - wait. 10-15 It's a matter of minutes before the glue gets under the lid, and it'll prevent the dust from getting inside the case.

7. Frequent problems after disassembly and their solution

Even if you did everything right, you can have problems after you've done it, and here are the most common ways to fix them.

If the phone starts to run out quickly after disassembly, check if the battery is installed correctly and if the contacts on the board are not damaged. Also make sure that high performance mode is not turned on (check in Settings). → Battery).

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If the phone is unstable after repair (it spontaneously reboots, warms up), most likely the problem is poor contact of the motherboard with the case. Try to change the phone, paying attention to fixing screws and plumes.

FAQ: Answers to Frequent Questions