Where is the speaker Xiaomi Redmi Note 7: location, inspection and repair

The Xiaomi Redmi Note 7 is still one of the most popular budget smartphones, despite the release of newer models, its reliability and price-quality ratio attract users, but even such devices eventually have problems — for example, with sound. If you notice that the speaker has become quieter, distorts the sound or stopped working, the first thing you need to do is find it correctly.

In this article, we will not only show you where the speaker is in the Redmi Note 7 (and why it is often confused with a microphone), but also explain how to diagnose faults yourself. You will learn what tools you need to disassemble, how to distinguish hardware from software failure, and what to do if the sound disappears after falling or getting moisture.

The material will be useful for both beginners and those who have already tried to fix the smartphone themselves. All instructions are based on official documentation of Xiaomi and the experience of service centers, and photos will help you visually navigate the device.

Xiaomi Redmi Note 7 design: where to look for a speaker

The Redmi Note 7 uses one main speaker (monophonic), which is responsible for playing sound during calls, music and videos. Unlike the flagship models, there are no stereo speakers - the second connector on the bottom panel (near the USB-Type C) is often mistaken for a speaker, but in fact it is a microphone for noise reduction.

To pinpoint the speaker's location, look at the bottom of the smartphone (where the charging connector is) to the left of the port. USB-C You'll see a grid with 7-9 And the speaker is the speaker, and on the right is the microphone grille (usually with a microphone) 5 smaller diameter holes. The photo below shows a comparison:

• 🔊 Dynamic: left lattice, 7–9 holes, sound when playing music.
• 🎤 Microphone: right grille, 5 holes, used for conversations and recording.
• ⚡ USB-C: Charging port in the center, not to be confused with the speaker!

Importantly, some Redmi Note 7 Pro versions or regional versions may have slightly different holes, but the arrangement remains the same. If you're in doubt, turn on the loud music and listen to it, the sound will come from the left grille.

How the speaker inside the Redmi Note 7: disassembly and diagram

The speaker in the Redmi Note 7 is a microscopic electrodynamic emitter that is attached to the motherboard through a flexible plume, located at the bottom of the body, under a metal plate, and covered with a protective mesh (the same lattice with holes).

• 🛠️ Body speaker: plastic module with magnet and membrane.
• 🔌 Power plume: a thin cable connecting the speaker to the motherboard.
• 🛡️ Protective net: prevents dust and debris from entering.
• 🧲 Sealer: rubber gasket for tightness (important when moisture is ingested).

When disassembling the smartphone, the speaker is under the following layers (from top to bottom):

1. Rear cover (glued, requires heating to remove).
2. Battery (soldered with a plume, you need to disconnect).
3. Metal plate (attached to 4 screws).
4. Dynamic (fixed on bilateral scotch).

To access the speaker, you will need to unscrew 8 screws (type) T3 and T5) And you can gently disconnect the battery and the camera, and don't pull the speaker plume, because it's fragile and can come off the board, and you can use a plastic mediator to tweak it.

How to check the speaker for performance: 3 ways

Before you disassemble the phone, make sure it's the dynamics, not the software settings, that are the three most reliable diagnostic methods:

1. Verification through the engineering menu

This is the most accurate way to test the hardware, to enter the engineering menu.

1. Open the Phone app.
2. Dial the combination: ##4636###.
3. Select the Hardware Testing option → Audio.
4. Press Speaker Test and listen to the sound.

If there is sound, the speaker is working. If not, there is a problem in the hardware (the speaker, the plume or the contacts on the board).

2. Testing through third-party applications

Install Phone Doctor Plus or TestM from Google Play. These programs check all components of the smartphone, including the speaker.

1. Launch the app.
2. Select Speaker or Sound.
3. Follow the instructions on the screen (usually ask to confirm if the sound is heard).

Manual inspection

If you can’t use the programs, check the speaker manually:

• 🎵 Turn on the music at maximum volume – the sound should be clear, without wheezing.
• 📞 Call your phone from another device – the ringtone must be played through the speaker.
• 🔊 Record a voice message and listen to it – if the sound is distorted, the problem may be in the microphone or speaker.

Typical malfunctions of the speaker and their causes

The speaker in the Redmi Note 7 can fail for several reasons. TOP-5 The most common problems and their signs:

If the problem occurred after the phone fell, most likely, the plume has departed or the speaker membrane has been damaged. If the sound has disappeared after moisture, check the oxidation of the contacts (needs to be cleaned with alcohol). In case of software failures (for example, after updating), resetting or flashing will help.

⚠️ Warning: If the speaker starts to wheez after prolonged use at maximum volume, this is a sign of wear and tear of the membrane.

How to clean the speaker Redmi Note 7 without disassembly

If the sound is quieter or there are wheezing, try to clean the speaker without disassembling. In 70% of cases, the problem is solved by removing dust and debris.

• 🧹 Soft toothbrush (new, unused!).
• 💨 A container with compressed air (can be replaced with a rubber pear).
• 🧴 Cotton swab dipped in isopropyl alcohol (no more than 70%).
• 🔦 Lighting lamp.

Step-by-step:

1. Turn off the phone and place it on a flat surface with the speaker grille up.
2. Carefully walk with a dry toothbrush on the speaker holes, moving in one direction (for example, from left to right).
3. Use compressed air (hold the balloon vertically, 5-7 cm away) to blow out the dust. Don't blow with your mouth - moisture from your breath can get in!
4. If there are any contamination, slightly wipe the grille with a cotton swab with alcohol, without pressing hard.
5. Let the phone dry for 10-15 minutes before turning on.

If the sound hasn't improved after cleaning, it means the problem is deeper, maybe the membrane has been damaged or the contacts have gone, and then you'll need to disassemble.

💡

Do not use sharp objects (needles, toothpicks) to clean the speaker, they can tear the membrane. Also avoid wet wipes: liquid can leak in and cause corrosion.

Replacement of the speaker in Redmi Note 7: step-by-step instructions

If the speaker doesn't work after cleaning and diagnostics, it needs to be replaced.The cost of the new module for the Redmi Note 7 is from 300 to 800 ₽ (depending on the seller, you will need a replacement:

• 🛠️ Setting screwdrivers (T3, T5, cross-section).
• 🔥 dryer or heat-tile.
• 🧲 Plastic mediator or shoulder blade.
• 🔧 Tweezers and soldering iron (if you need to solder the plume).

Step-by-step process:

1. Turn off the phone and remove the tray for SIM-map.
2. Heat the back cover with a hair dryer (a temperature of ~60°C) for 2-3 minutes to soften the glue.
3. Put the lid on the mediator, starting at the bottom corner (where the speaker is). Be careful, there are plumes under the lid!
4. Unscrew 8 screws that fix the metal plate over the battery.
5. Disconnect the battery plume (use a plastic blade to avoid damaging the contacts).
6. Remove the metal plate and find the speaker - it is glued to the body.
7. Carefully disconnect the speaker plume from the motherboard (do not pull the wires!).
8. Install a new speaker, plug in the plume and assemble the phone in reverse order.

⚠️ Warning: When you assemble, make sure that the sealing gum speaker is in place, it protects against dust. If it is not, the sound will be muffled.

If the speaker still does not work after replacing, check:

• 🔌 Correctness of connection of the plume (it must click when fixing).
• 🔋 The state of contacts on the motherboard (clean with alcohol when oxidizing).
• 📱 Phone sound settings (probably system sound disabled).

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The most common mistake when replacing a speaker is to connect the plume incorrectly. Make sure it's plugged in to the point and locked with a latch. If the plume dangles, there's no sound!

What to do if the speaker does not work after a fall or moisture

Falls and liquids are the two main reasons for the speaker failure in the Redmi Note 7. Depending on the situation, the actions will be different.

If the phone falls

With mechanical shock, most often suffer:

• 🔊 Dynamic membrane (cracking or deforming).
• 🔌 The plume (departs from the fee or breaks).
• 📱 Contacts on the board (bending or breaking).

What to do:

1. Check the speaker for performance (see section above).
2. If there is no sound, take the phone apart and check the integrity of the plume.
3. If the plume is severed, it can be soldered back (but it is better to entrust this to a specialist).

If the phone is wet

Moisture causes contacts to corrosion and short circuits.

1. Turn off the phone and remove the battery (if possible).
2. Dry the speaker with a dryer in cold mode or leave the phone in rice for 24 hours.
3. Clean the contacts with alcohol (at least 90%) – this will remove the oxides.
4. If after drying the sound is not restored, replace the speaker - moisture could damage the membrane.

Don't turn on the phone until it's completely dry!Even if it turns on, the moisture inside can cause corrosion after a few days.

FAQ: Frequent questions about the dynamics of Xiaomi Redmi Note 7