Teardown difficulty:
Moderate

Recommended tools

Disassembly of the mobile device Samsung Galaxy A9 Pro (2019) SM-G887 (Samsung Galaxy A8s SM-G8870) with each step description and the required set of tools.


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Step 1. Before disassembling!

⚠️ Before disassembling, do not forget to turn your phone off.


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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.


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Step 3. 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 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.

Do not let the liquid get inside the smartphone.

The process can be seen in our video entirely so, as well as in detail, at the end of the instructions.


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Step 4. Unscrew the screws

Using a screwdriver (Phillips 1.5 mm PH000), unscrew 8 screws.


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Step 5. Open the cover

Pry up the connector and remove the cover with an NFC and a fingerprint sensor.


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Step 6. Disconnect the battery connector

Disconnect the battery connector as soon as possible. ℹ️️ The Samsung Galaxy A9 Pro SM-G887 / Samsung Galaxy A8s Pro SM-G8870 (both the same model) has a battery EB-BA750ABU with 3400 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.


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Step 7. Unscrew the screws

Using a screwdriver (Phillips 1.5 mm PH000), unscrew 8 screws.


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Step 8. Remove the loudspeaker

Remove the loudspeaker assembly with antennas.


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Step 9. Unscrew one screw

Using a screwdriver (Philips 1.5 mm PH000), unscrew one screw securing the sub-board.


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Step 10. 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 11. Remove the battery

Carefully we remove the battery.

In our case we had a non-original barely glued battery. So, we just pried and removed it. You, maybe need a particular tool like plastic film/sheet and isopropyl alcohol to dry the adhesive base.

As you can see under the battery there is nothing; no cables or open space leads to the display. It will make this task easier. However, do not forget our moto slowly but surely, do no rush, push hard, or pry. It's a marathon, not a sprint!


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Step 12. Disconnect the connector

Pry up the coaxial cable connector.


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Step 13. 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.


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Step 14. Remove the front camera

Pry up the connector and remove the front (selfie) camera.


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Step 15. Unscrew one screw

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


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Step 16. Disconnect the connectors

Pry up the connectors of the display module cable, proximity sensor 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 17. 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.


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Step 18. Remove the cameras

Pry up the connectors and remove the three rear cameras assembly.

Detailed disassembly instructions of Samsung Galaxy A9 Pro (2019) SM-G887 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 minutes in time. Our manual is suitable for all models Samsung Galaxy A9 Pro SM-G887 — Samsung Galaxy A8s Pro SM-G8870 released for markets in different countries.



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