We disassemble Xiaomi Redmi Note 7: where are the buttons, connectors and internal modules

Why do you need to know the location of the elements in the Redmi Note 7?

Xiaomi Redmi Note 7 remains one of the most popular budget devices even years after its release, its reliability and maintainability make the model popular in the secondary market. But what if you need to replace the battery, clean the charging connector or check the performance of the speaker? Without knowing the exact location of the components, the risk of damage to the board or plumes increases significantly.

This article will help you understand where the key elements are in the Xiaomi Redmi Note 7 phone, from external buttons to chips on the motherboard. We will look at both surface parts (connectors, cameras, speakers) and hidden components (antennas, sensors, microphones), information will be useful for both self-repair and for diagnosing faults before going to the service center.

Particular attention will be paid to typical problems of the model - for example, why the vibration call stops working or how to check the serviceability of the Type-C connector. All schemes and recommendations are based on official Xiaomi documentation and the experience of repair masters.

External elements: buttons, connectors and speakers

To start with, what you can see with the naked eye is that the Redmi Note 7 is made of aluminum-framed glass (front and back), which affects access to the internal components, and these are the main exterior elements and their layout:

• 🔋 The Type-C connector is in the bottom of the case, in the center, responsible for charging and transmitting data, a common problem: contamination of contacts or mechanical damage when the cable is not properly connected.
• 🔊 Main speaker - located to the right of the Type-C connector. Responsible for sound reproduction during calls and multimedia.
• 🎤 Microphone next to the Type-C connector on the left (if you look at the screen) and the second noise-cancellation microphone is at the top of the body.
• 📶 Tray for SIM-The card is on the left side of the card, and supports two nano-SIMs or one nano-SIM. + microSD.

The control buttons are arranged in the same way as Xiaomi’s, with the power button on the right side (just above the middle), the volume buttons under the power button, and the fingerprint scanner embedded in the screen (at the top), rather than on the back, as in earlier Redmi Note series models.

⚠️ Warning: When cleaning the Type-C connector, do not use metal objects - this can damage the contacts.

Back: Cameras, sensors and hidden elements

The back of the Redmi Note 7 hides several important components, and underneath the glass panel are:

• 📷 Dual main camera - vertical module in the upper left corner (when you look at the screen). IMX486 (48 MPP, f/1.8) Additional sensor (5 MP, for background blur)
• 💡 LED flash between cameras, can be used as a flashlight.
• 📡 Antenna lines are thin metal strips on the sides of the body, responsible for receiving the signal. LTE/Wi-Fi.
• 🔋 Battery - takes up most of the interior space (capacity 4000 mAh) and fastened on double-sided scotch.

Under the back panel is also hidden: vibromotor (in the lower part, next to the motherboard), NFC-antenna (in the upper part, if the model supports the NFC), proximity and illumination sensor (near the front camera).

Fun fact: The Redmi Note 7 uses an infrared port (at the top of the case) that allows you to control appliances through the Mi Remote app. This is a rare feature for budget smartphones.

Internal Disassembly: Motherboard and Key Chips

To access the internal components, you need to remove the back panel, which requires heating the adhesive layer (better use a hair dryer or a special station) and carefully tweaking the mediator.

1. The battery is glued to the body, detached after the plume is turned off.
2. The motherboard is located under the battery. It's mounted on the screws.
3. Trains – connect the board with the screen, buttons and other modules.

The Redmi Note 7 motherboard features the following chips (see table below):

Important: the Qualcomm PMI8998 power chip is located next to the charging connector and often fails when using non-original RAM. If the phone does not turn on or charge, in 70% of cases, the problem is in it.

⚠️ Warning: Don't pull the plumes when disassembling - they're fragile and can come off the board. Use a plastic mediator to gently disconnect.

Turn off the phone and remove it. SIM-map

Heat the back panel with a hair dryer (temperature 60-70°C)

Prepare plastic mediators and a T3 screwdriver

Turn off the battery before working with the fee

Take a picture of the location of screws and plumes-->

Frequent problems and how to diagnose them

Knowing the location of the components helps to quickly determine the cause of the malfunction.

• 🔋 No charge. → Check: Type-C connector (contamination, damage to contacts) Charging plume (may move away from the board) Power chip PMI8998
• 🔊 No sound in the speaker. → Possible causes: Mesh pollution speaker (dust, moisture) Damage to plume or contacts on the board Audio codec malfunction WCD9340
• 📶 Bad signal from the network → The problem may be in: Antenna lines (check integrity) WCN3990 (Wi-Fi/Bluetooth) SIM-tray (contacts may have oxidized)

If the vibration call does not work, check: vibromotor (the lower part of the board), plume connecting it to the motherboard, settings in the Sound → Vibration menu.

Often the problem is solved by simple cleaning of contacts or replacement of the engine (the cost of the part is ~ 300 rubles).

To diagnose screen problems (artifacts, lack of image), check: the display plume (may be clamped or damaged), the connector on the motherboard, the matrix itself (for physical damage).

In Redmi Note 7 uses IPS-matrix with a resolution of 2340×1080, and its replacement costs 3-5 thousand rubles.

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If the phone falls into water, DO NOT turn it on right away. Disassemble, dry the board in rice or silica gel for 24-48 hours, then alcohol-clean the contacts. This will increase the chances of recovery.

How to safely disassemble Redmi Note 7: step-by-step instructions

If you're going to take your phone apart, follow this algorithm. You'll need tools like plastic mediators, a T3 screwdriver, a hair dryer or a thermo-air station, a screen suction cup.

1. Turn off the phone and remove it. SIM-Wait for the battery to cool down completely.
2. Heat the back panel with a hair dryer (60-70°C) for 2-3 minutes to soften the glue.
3. You can put the mediator in the panel, starting at the bottom corner, and you can move around the perimeter carefully.
4. Disconnect the battery plume (it is under a black insulation tape).
5. Unscrew the screws of the motherboard fastening (there are 12 pieces, all of different lengths - remember the location!).
6. Carefully disconnect all plumes, starting with the camera and screen.

The rule is, don't put too much effort into it -- if something doesn't disconnect, check if all the screws are twisted and if you forgot to turn off the plume.

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The most common mistake in disassembling is to damage the fingerprint scanner plume, which is thin and goes from screen to board. Be especially careful with this part!

Where to find spare parts and how much they cost

For repair Redmi Note 7 spare parts can be purchased at the following sites: AliExpress (cheap, but long), eBay (faster, but more expensive), local service centers (guarantee, but the price is higher).

The cost of popular components (2026):

When buying spare parts, pay attention to: compatibility with the phone version (for example, the Redmi Note 7 and Note 7 Pro have different cameras), quality of execution (cheap Chinese counterparts can quickly fail), equipment (the screen replacement kit should include glue and tools).

Xiaomi doesn’t sell original parts directly, but certified service centers use parts from official suppliers. If you’re in doubt, it’s best to turn to professionals — especially to replace chips or solder contacts.

FAQ: Frequent questions about Redmi Note 7