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Casio fx-82MS Button Replacement

Casio fx-82MS Button Replacement

Rebecca Dowling e 4 altri collaboratori

Ultimo aggiornamento il 21 ott 2023

10 minuti

Facile

Introduzione

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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Passo 1 Button

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.

Passo 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.

Passo 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.

Passo 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.

Passo 5

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.

Passo 6

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.

Passo 7

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.

Passo 8

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.

Passo 9

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.

Passo 10

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

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

Passo 11

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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Autore

con 4 altri collaboratori

Rebecca Dowling

Membro da: 12/05/16

104 Reputazione

1 Guida realizzata

+ 1 altro distintivo

Team

Delft University of Technology, Team 1-6, Flipsen Fall 2016 Membro di Delft University of Technology, Team 1-6, Flipsen Fall 2016

TUD-FLIPSEN-F16S1G6

3 Membri

2 Guide realizzate

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