⚠️ Before disassembling, do not forget to turn your phone off.
Disassembly of the mobile device Xiaomi RedMi Note 3 Pro SE (Xiaomi RedMi Note 3 Pro SE 2015161) with each step description and the required set of tools.
Step 2. Remove the tray
Use the ejection tool (aka Needle) or Paperclip. Push the tip all the way into the hole until the tray ejects, and then pull the tray of SIM and Memory card (Micro SD) out.
⚠️ Pay attention! The tool must be inserted into a hole on the edge of the phone's housing. Do not press too hard. It may break the tray eject mechanism.
Step 3. 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. The thin cable and fragile buttons are straightforward to damage.
⚠️ Look in advance in the picture for the cables’ location for fingerprint sensor, inter-board, touchscreen, display, buttons (if any) under the cover to not damage them accidentally.
Step 5. Disconnect the battery connector
Disconnect the battery connector as soon as possible.
ℹ️️ The Xiaomi RedMi Note 3 Pro SE 2015161 model has a battery BM46 with 4000 mAh capacity (aka rechargeable battery).
⚠️ It is highly recommended to disconnect the connector to avoid possible short circuits during disassembly.
Also, try not to use a metal tool to disconnect the rechargeable battery connector or do it carefully.
Step 6. Unscrew the screws
Using a screwdriver (Phillips 1.5 mm PH000), unscrew five screws. ℹ️️ Be sure to note the location of the screws before disassembling. When assembling the device, screwing the screw in the wrong place may damage the device or its parts.
To avoid damage, the removed screws and individual pieces (as gaskets or brackets) must be laid out in the appropriate order, or the screws and their holes in the phone must be marked with colored markers.
Step 8. Disconnect the connectors
Disconnect the coaxial cable connector, cable to the mainboard, on the daughterboard.
⚠️ 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).
Step 9. Remove the daughterboard
Remove the sub-board. It is glued to the frame with metalized tape, so to facilitate the process, the sub-board can be heated a bit.
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.
Step 10. Unscrew the screws
Using a screwdriver (Philips 1.5 mm PH000), unscrew four screws and remove the cover with antenna tracks.
ℹ️️ Be sure to note the location of the screws before disassembling. When assembling the device, screwing the screw in the wrong place may damage the device or its parts. To avoid damage, the removed screws and individual pieces (as gaskets or brackets) must be laid out in the appropriate order, or the screws and their holes in the phone must be marked with colored markers.
Step 12. Unscrew the screws
Using a screwdriver (Philips 1.5 mm PH000), unscrew three screws and remove the bracket securing the vibration motor.
Step 14. Disconnect the connectors
Pry up the connectors of power volume buttons cable, display cable, touchscreen cable, inter-board 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.
Step 15. Remove the motherboard
Carefully remove the printed circuit board. There is no need to use a lever or try to reach the board by force. Make sure that nothing is getting in the way or holding the board.
⚠️ 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.
Step 16. In the display frame remained
ℹ️️ In the display frame remained: the earpiece speaker, battery, and vibration motor.
Detailed disassembly instructions of Xiaomi RedMi Note 3 Pro SE in the video, made by our mobile repair & service center:
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