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Disassembly/Repair of the mobile device Xiaomi Redmi 7A (Xiaomi Redmi 7A M1903C3EG) with each step description and the required set of tools.


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How to disassemble Xiaomi Redmi 7A, Step 1/1 How to disassemble Xiaomi Redmi 7A, Step 1/2

Step 1. Open the back cover

Using a spudger or a plastic pick, carefully, around the edge, detach the back cover clips, and remove it.

Do not insert the tool deeply or bend it. Otherwise, the housing may be tampered with or damaged.

⚠️️ Be careful when opening the cover from the volume and power buttons side. Thin cable and fragile buttons are straightforward to damage.


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Step 2. Unscrew the screws

Using a screwdriver (Phillips 1.5 mm PH000), unscrew the eight screws.


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Step 3. Open the cover

Pry over the edge and remove the cover hiding the motherboard.


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Step 4. Disconnect the battery connector

Disconnect the battery connector as soon as possible. It is better to use a non-metal or plastic tool to avoid any damage.

ℹ️️ The Xiaomi Redmi 7A model has a battery BN49 with 4000 mAh capacity (aka rechargeable battery).

⚠️️ It is highly recommended to disconnect the connector to avoid possible short circuits during disassembly.


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Step 5. Unscrew the screws

Using a screwdriver (Phillips 1.5 mm PH000), unscrew the eight screws.


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Step 6. Remove the loudspeaker

Pry over the edge and remove the loudspeaker assembly.


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Step 7. Remove the inter-board cable

Carefully, preferably from the edge, disconnect the connectors and remove the inter-board cable connecting the mainboard to the daughterboard (also known as the sub-board).

⚠️️ Be careful when removing the cables from the connectors, the cables are pretty thin, and it is easy enough to break them or damage the contact tracks inside.

ℹ️️ An arrow on the FFC cable (flexible flat cable) indicates its correct position.


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Step 8. Disconnect the connectors

Disconnect the coaxial cable connector, cable to the touchscreen.

⚠️️ Do not pull on the cable or pry it with a sharp tool, the connectors are pretty weak and break easily, or the cable falls out of the end (lug).


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Step 9. Remove the daughterboard

Remove the sub-board. It may be glued to the frame or attached with attachments like latches or hooks, so be careful.

ℹ️️ The sub-board contains a charging port (Micro-USB), microphone, spring contacts for the speaker, and an antenna unit.

⚠️️ It is not necessary to insert the tool underneath when removing the sub-board. Internal components could be damaged.


How to disassemble Xiaomi Redmi 7A, Step 10/1 How to disassemble Xiaomi Redmi 7A, Step 10/2

Step 10. Disconnect the connectors

Pry up the connector of the display module cable, coaxial cable.

⚠️️ Be careful when removing the cables from the connectors, the cables are pretty thin, and it is easy enough to break them or damage the contact tracks inside.


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Step 11. Remove the battery

Bend the display module cable vertically and remove the battery.

With extreme care, remove the battery because it is glued from the inside by the manufacturer.


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Step 12. Unscrew one screw

Using a screwdriver (Phillips 1.5 mm PH000), unscrew one screw securing the motherboard.


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Step 13. Remove the motherboard

Carefully remove the printed circuit board. There is no need to use a lever or try to reach the circuit board by force. Make sure that nothing is getting in the way or holding the circuit board.

The motherboard, also, may be attached with attachments like latches or hooks, be careful.

⚠️️ Do not bend the circuit board when removing it or push tools under it. Unbeknownst to yourself, you can damage components or cables from the inside.


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Step 14. Remove the front camera

Disconnect the connector on the motherboard, and remove the front (selfie) camera.


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Step 15. Remove the rear camera

Disconnect the connector on the motherboard, and remove the rear camera.

Detailed disassembly instructions of Xiaomi Redmi 7A in the video, made by our mobile repair & service center:

If you have a question, ask us, and we will try to answer in as much detail as possible. If this article was helpful for you, please rate it.


Disassembling\Repair has easy complexity and takes about 9 minutes in time. Our manual is suitable for all models Xiaomi Redmi 7A — Xiaomi Redmi 7A M1903C3EG released for markets in different countries.



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