Casio fx-82MS Button Replacement

ID: 75195

Description: The Casio fx-82MS is a commonly used simple...

Steps:

1. This is the calculator in question.
2. The tools you will need are: a Phillips screwdriver, a spudger and a soldering iron.
3. If you don't have access to a solding iron, you need a stanley knife instead.

4. Flip over the calculator.
5. Locate the 6 screws on the backside.
6. Remove all six screws.

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

8. Locate the rubber contact points.
9. Solder the rubber contact points, while using the spudger to pry the PCB loose.
10. PCB stands for Printed Circuit Board.
11. Toxic gasses might be created. Hence, do this in a well ventilated room.
12. Start with the lower plugs (left on the photo). Gently pry the PCB loose at the same time.
13. 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.
14. If you don't have accessibility to a solder iron, use a utility knife to remove the plugs.

15. After having soldered away all six plugs, lift up the PCB.
16. Flip the board sideways as shown in the picture.

17. Remove the rubber mat.
18. Do this carefully, to make sure the buttons stay in their place.

19. Replace the broken button.

20. Put the rubber mat back in its place.
21. Make sure you push the six slightly damaged plugs through the rubber mat.

22. Push the PCB back into place.
23. Again make sure you push the slightly damaged plugs through the PCB, to make everything fits perfectly again.

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

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