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Casio fx-82MS Button Replacement

Casio fx-82MS Button Replacement

Rebecca Dowling

Rebecca Dowling e 4 altri collaboratori

Ultimo aggiornamento il 21 ott 2023

10 minuti
Facile

Introduzione

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The Casio fx-82MS is a commonly used simple calculator in many schools. It has a very long lifetime. But sometimes a button stops working, which can be very annoying. In this guide we will guide you through the steps to fix this problem.

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  1. Casio fx-82MS Button Replacement, Button: passo 1, immagine 1 di 2 Casio fx-82MS Button Replacement, Button: passo 1, immagine 2 di 2

    • This is the calculator in question.

    • The tools you will need are: a Phillips screwdriver, a spudger and a soldering iron.

    • If you don't have access to a solding iron, you need a stanley knife instead.

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  2. Casio fx-82MS Button Replacement: passo 2, immagine 1 di 1

    • Flip over the calculator.

    • Locate the 6 screws on the backside.

    • Remove all six screws.

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  3. Casio fx-82MS Button Replacement: passo 3, immagine 1 di 1

    • Once all six screws have been removed, take the back part off of the calculator.

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  4. Casio fx-82MS Button Replacement: passo 4, immagine 1 di 2 Casio fx-82MS Button Replacement: passo 4, immagine 2 di 2

    • Locate the rubber contact points.

    • Solder the rubber contact points, while using the spudger to pry the PCB loose.

    • PCB stands for Printed Circuit Board.

    • Toxic gasses might be created. Hence, do this in a well ventilated room.

    • Start with the lower plugs (left on the photo). Gently pry the PCB loose at the same time.

    • For this step a third person is required for safety. One person uses the solder iron, the other one uses the spudger to pry the PCB loose.

    • If you don't have accessibility to a solder iron, use a utility knife to remove the plugs.

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  6. Casio fx-82MS Button Replacement: passo 5, immagine 1 di 1

    • After having soldered away all six plugs, lift up the PCB.

    • Flip the board sideways as shown in the picture.

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  7. Casio fx-82MS Button Replacement: passo 6, immagine 1 di 2 Casio fx-82MS Button Replacement: passo 6, immagine 2 di 2

    • Remove the rubber mat.

    • Do this carefully, to make sure the buttons stay in their place.

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  8. Casio fx-82MS Button Replacement: passo 7, immagine 1 di 2 Casio fx-82MS Button Replacement: passo 7, immagine 2 di 2

    • Replace the broken button.

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  9. Casio fx-82MS Button Replacement: passo 8, immagine 1 di 2 Casio fx-82MS Button Replacement: passo 8, immagine 2 di 2

    • Put the rubber mat back in its place.

    • Make sure you push the six slightly damaged plugs through the rubber mat.

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  10. Casio fx-82MS Button Replacement: passo 9, immagine 1 di 1

    • Push the PCB back into place.

    • Again make sure you push the slightly damaged plugs through the PCB, to make everything fits perfectly again.

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  11. Casio fx-82MS Button Replacement: passo 10, immagine 1 di 1

    • Place the back side of the casing back on top of the front.

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  12. Casio fx-82MS Button Replacement: passo 11, immagine 1 di 1

    • Put all six screws back in the back side of the casing.

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