Teardown difficulty:
Moderate
Duration:
15 min

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Disassembly of the mobile device Nokia 5.1 Plus TA-1105 with each step description and the required set of tools.

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How to disassemble Nokia 5.1 Plus TA-1105, Step 1/1 How to disassemble Nokia 5.1 Plus TA-1105, Step 1/2

Step 1. Before disassembling!

⚠️ Before disassembling. Don't forget to turn your phone off.


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Step 2. Remove the tray

Using the Key or Paperclip tool and open the SIM and Memory cards (Micro SD) tray and take it out.

⚠️ Pay attention! The tool must be inserted into a special hole on the edge of the phone's housing. Do not press too hard, it may break the tray ejection 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.

⚠️ Pay attention to the fingerprint sensor cable located from the inside.


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Step 4. Disconnect the fingerprint sensor

Disconnect the fingerprint sensor connector and remove the cover.


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Step 5. Unscrew the screws

Using a screwdriver (Torx T5), unscrew the 12 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 part. 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.


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Step 6. Open the cover

Remove the cover with antennas that protect the printed circuit board (PCB). Try to lift the covers by the edges and not push anything between them to not accidentally touch or short-circuit anything on the PCB.

ℹ️️ On the upper cover, you can see the metalized coating on the plastic in the form of tracks and contact pads. These are Wi-Fi, Bluetooth, and GPS antennas.

⚠️ It is crucial while reassembling, checking the spring contacts on the board, and the contact pads on the cover match and touch. Otherwise, signal loss or signal may be quite weak.


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Step 7. Disconnect the battery connector

Disconnect the battery connector as soon as possible.

ℹ️️ The Nokia 5.1 Plus TA-1105 model has a battery HE342 with 3000 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 8. Unscrew the screws

Using a screwdriver (Torx T5), unscrew the 7 screws.

ℹ️️️ 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 part. 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.


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Step 9. Open the cover

Open the cover hiding the PCB.


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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. Disconnect the connector

Pry up the coaxial cable connector.


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Step 12. Remove the daughterboard

Remove the sub-board. It is glued to the frame with metalized tape, so to facilitate the process, the board can be heated a bit.

ℹ️️ The 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 under the board when removing the sub-board. Internal components could be damaged.


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Step 13. Remove the loudspeaker

Remove the loudspeaker assembly.


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Step 14. Remove the front camera

Disconnect the connector and remove the front (selfie) camera.


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Step 15. Disconnect the connectors

Pry up the connectors 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 16. 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 17. Remove the cameras

Disconnect the connectors and remove the assembly of two rear cameras.

Detailed disassembly instructions of Nokia 5.1 Plus TA-1105 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.

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Disassembling\Repair has medium complexity and takes about 15 minutes in time. Our manual is suitable for all models Nokia 5.1 Plus TA-1105 released for markets in different countries.



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