How to fix sticky buttons for a TI-30X IIS

Written By: Yong Ho Kim
  • Comments: 1
How to fix sticky buttons for a TI-30X IIS

Difficulty

Moderate

Steps

8

Time Required

25 - 45 minutes

Introduction

If your Texas Instruments Calculator(model TI-30XIIS) buttons are sticky/stuck. Most likely, the calculator's keyboard membrane and sensor are dirty and require cleaning.

Keeping buttons from sticking and removing the sticking is easy and simple with a little cleaning. Fixing the issue at the source saves money and unnecessary tech waste rather than getting rid of a difficult-to-use calculator.

Although in step 6 we will be removing the circuit board, it does not require any soldering since we will not be disconnecting any connected wires from the calculator.

Make sure to turn off the calculator before beginning.


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    • Use the #0 Phillips screwdriver to remove the 4 screws at the back of the calculator

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    • Use a Flat Head Screwdriver or a thin strong object like a card to separate the front and the back of the case.

    • Separate it carefully to not break the 8 clips.

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    • Use a pointed tool to push the battery out of its terminal until it is out far enough to remove with your fingers.

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    • Using a knife, Razor, or other perscion cuting tool, remove the top of the 10 plastic rivets that connect the keyboard sensor to the front case.

    • Be careful when moving the calculator when the rivets are gone since they keep the calculator's keyboard sensor and keys together when the calculator back case is off. Keep keys down to prevent the loss of keys.

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    • Use a flat tool to unclip the two tabs that secure the circuit board.

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    • Remove the circuit board, keyboard sensor, and keyboard membrane from the front case.

    • The circuit board has 2 wires connecting to the solar panel, This cannot be removed without soldering/desoldering the connecting wires. Move all listed parts above to a location where there is little to no tension on the wired to prevent damage.

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    • Use rubbing alcohol to wipe down both parts using q-tips or any other cleaning cloth.

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    • Using q-tips, remove the keys and clean the keyhole and the keys to ensuring that they are residue-free. When done, return all the keys to their original position.

    • Keys are very light and small, have a container or a safe location to keep keys to prevent keys from getting lost.

Conclusion

To reassemble your device, follow these instructions in reverse order.

Author

Yong Ho Kim

Member since: 31/01/23

193 Reputation

One comment

Fantastic guide. Is there any concern with cutting the plastic rivets?

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