Teardown difficulty:
Hard
Duration:
8 min

Recommended tools

Disassembly/Repair of the mobile device Xiaomi RedMi 4A with each step description and the required set of tools.


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How to disassemble Xiaomi Redmi 4A, Step 1/1 How to disassemble Xiaomi Redmi 4A, Step 1/2

Step 1. 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.


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Step 2. 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 3. Unscrew the screws

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


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Step 4. Open the cover

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


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Step 5. Unscrew the screws

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


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Step 6. Remove the loudspeaker

Pry over the edge and remove the loudspeaker assembly with antenna tracks.


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Step 7. 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 4A model has a battery BN30 with 3030 mAh capacity (aka rechargeable 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.


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Step 8. Unscrew one screw

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


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Step 9. Remove the coaxial cable

Pry up the connectors and remove the coaxial cable.


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Step 10. Remove the daughterboard

Disconnect the coaxial cable connector, inter-board cable.

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 11. Remove the rear camera

Disconnect the connector on the motherboard. Pry at the end of the body and remove the rear camera with its frame.


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Step 12. Disconnect the connectors

Pry up the connectors of the side buttons cable, display cable, touchscreen 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 13. Turn over the PCB

Turn over the motherboard, disconnect the connector of the inter-board cable from the inside and remove the motherboard.


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Step 14. Remove the earpiece speaker

Pry at the bottom and remove the earpiece speaker.

⚠️️ Be careful! The earpiece speaker is glued a bit with adhesive.

⚠️️ If we pry the speaker in the middle we may break the earpiece speaker in half.


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Step 15. Remove the vibration motor

Pry at the bottom and remove the vibration motor.

⚠️️ Be careful! The vibration motor is glued a bit with adhesive.


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Step 16. Remove the buttons

Unstick the side buttons cable and remove it.


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Step 17. In the display frame remained

ℹ️️ In the display frame remained:

Detailed disassembly instructions of Xiaomi RedMi 4A 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 hard complexity and takes about 8 minutes in time. Our manual is suitable for all models Xiaomi RedMi 4A released for markets in different countries.



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