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Introdução

This guide shows the step by step process of how to disassemble a TI-89 Titanium calculator in order to replace the power button. This guide may also be followed in order to replace any of the other buttons on the calculator. This process requires few tools and should only take thirty minutes. Please be careful during the disassembly to not damage the internals of the calculator.

  1. Remove the six T6 screws from the back of the calculator.
    • Remove the six T6 screws from the back of the calculator.

  2. Remove the battery cover.
    • Remove the battery cover.

  3. Unscrew the Phillips screw on the internal battery cover.
    • Unscrew the Phillips screw on the internal battery cover.

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  5. Using a spudger or similar prying tool carefully pop the back of the calculator off.
    • Using a spudger or similar prying tool carefully pop the back of the calculator off.

  6. Remove the back of the calculator.
    • Remove the back of the calculator.

  7. Remove the six Phillips head screws from the circuit board.
    • Remove the six Phillips head screws from the circuit board.

  8. Remove the circuit board and the attached display screen. Make sure not to damage the circuit board.
    • Remove the circuit board and the attached display screen. Make sure not to damage the circuit board.

  9. Peel back the rubber grommet sheet.
    • Peel back the rubber grommet sheet.

    • Make sure that the buttons remain attached the the rubber grommet as you remove it.

  10. Remove and replace the On button.
    • Remove and replace the On button.

Conclusão

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

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