Teardown difficulty:
Moderate
Duration:
14 min

Recommended tools

Disassembly/Repair of the mobile device Xiaomi Mi Mix 2S (Xiaomi Mi Mix 2S M1803D5XA) with each step description and the required set of tools.


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How to disassemble Xiaomi Mi Mix 2S, Step 1/1 How to disassemble Xiaomi Mi Mix 2S, Step 1/2

Step 1. Open the back cover

We recommend using a special heating device such as a separator machine, heat gun, or heating mat. It will simplify the process. You can use a home hairdryer, but you will have to make a nozzle by hand or have a suitable one in the kit to gently heat and concentrate the heat flow in the right place.

ℹ️️ The surface of the back cover must be heated to soften the adhesive underneath. The approximate heating temperature is 50° C / 125° F.

Use a thin plastic film or pick for separation. To facilitate the process, you can use isopropyl alcohol. It is often the most difficult to pass the tool between the parts to be divided. Choose the far edge from the FFC cables or buttons.

Do not use a lever or any force for separation that could damage the elements inside.

⚠️️ Pay attention to the fingerprint sensor cable! The cable connects the fingerprint sensor on the back cover to the motherboard.


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Step 2. Unscrew the screws

Using a screwdriver (Phillips 1.5 mm PH #000), unscrew the ten screws.


How to disassemble Xiaomi Mi Mix 2S, Step 3/1 How to disassemble Xiaomi Mi Mix 2S, Step 3/2

Step 3. Open the cover

Pry over the edges. Move an opening tool along the edge detach the clips and remove the cover with an NFC tag and antenna pads and tracks.


How to disassemble Xiaomi Mi Mix 2S, Step 4/1

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 Mi Mix 2S model has a battery BM3B with 3300 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. Disconnect the connector

Pry up the fingerprint sensor connector and remove the back cover.


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Step 6. Unscrew one screw

Using a screwdriver (Philips 1.5 mm PH #000), unscrew one screw securing the motherboard.


How to disassemble Xiaomi Mi Mix 2S, Step 7/1 How to disassemble Xiaomi Mi Mix 2S, Step 7/2

Step 7. Unscrew the screws

Using a screwdriver (Philips 1.5 mm PH #000), unscrew the five screws.


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Step 8. Unscrew the screws

Using a screwdriver (Philips 1.5 mm PH #000), unscrew the two short screws.


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Step 9. Remove the loudspeaker

Disconnect the coaxial cable connector. Pry over the edges and remove the loudspeaker assembly with a coaxial cable.


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Step 10. Disconnect the connectors

Disconnect the coaxial cable connector, inter-board cable connector, connector to the LED light sensor.

⚠️️ 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 11. 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.


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Step 12. Remove the battery

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

Also, we need to remember or look in advance at the location of the flat cables under the battery, so as not to damage them.


How to disassemble Xiaomi Mi Mix 2S, Step 13/1

Step 13. Disconnect the connectors

Pry up the connectors of the side buttons cable, display module cable, inter-board cable, front camera cable, and 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 14. 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 15. Remove the cameras

Pry up the connector and remove the assembly of the two rear cameras.


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Step 16. Remove the front camera

Carefully peel off the long flat cable with a front (selfie) camera.


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Step 17. In the display frame remained

ℹ️️ In the display frame remained: the vibration motor, earpiece speaker, coaxial cable.

Detailed disassembly instructions of Xiaomi Mi Mix 2S 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 medium complexity and takes about 14 minutes in time. Our manual is suitable for all models Xiaomi Mi Mix 2S — Xiaomi Mi Mix 2S M1803D5XA released for markets in different countries.



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