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Texas Instruments TI-80 Keyboard Mat Replacement

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  1. Texas Instruments TI-80 Keyboard Mat Replacement, Batteries: passo 1, immagine 1 di 1
    • Locate battery cover on the back of the case.

    • Slide battery cover to the right reveal the batteries.

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  2. Texas Instruments TI-80 Keyboard Mat Replacement: passo 2, immagine 1 di 1
    • Remove battery cover.

    • Slide the red lock down.

    • Slide the metal tab to the right of the top battery.

    • Remove the 3-Volt Lithium Coin Cell Battery.

    • Slide the red lock up.

    • Slide the metal tab to the right of the bottom battery.

    • Remove the 3-Volt Lithium Coin Cell Battery.

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  3. Texas Instruments TI-80 Keyboard Mat Replacement, Back Case: passo 3, immagine 1 di 3 Texas Instruments TI-80 Keyboard Mat Replacement, Back Case: passo 3, immagine 2 di 3 Texas Instruments TI-80 Keyboard Mat Replacement, Back Case: passo 3, immagine 3 di 3
    • Using a Torx, T-6 star-bit screwdriver, unscrew four 7.38 mm screws from battery housing.

    • Unscrew four 7.15 mm screws from back casing.

    • Using the blue plastic opener tool along the seam of the case, pry off front casing.

    • Start prying from the bottom of the calculator as the casing hooks into the top.

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  4. Texas Instruments TI-80 Keyboard Mat Replacement, Motherboard and Screen: passo 4, immagine 1 di 2 Texas Instruments TI-80 Keyboard Mat Replacement, Motherboard and Screen: passo 4, immagine 2 di 2
    • Using a Philips PH0 screwdriver, remove the 6 screws. 2 from the top of the Motherboard, 2 from the middle, and 2 from the bottom of the Motherboard.

    • Using a Phillips Ph0 screwdriver, remove 4 screws from the screen mount.

    • Using the blue plastic opening tool, pry the Motherboard up.

    • Using the blue plastic opening tool, pry up the screen from the screen mount.

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  5. Texas Instruments TI-80 Keyboard Mat Replacement, Check keyboard mat: passo 5, immagine 1 di 2 Texas Instruments TI-80 Keyboard Mat Replacement, Check keyboard mat: passo 5, immagine 2 di 2
    • Check the rubber mat for damage or obstruction at the location of non-functioning buttons.

    • Flip the mat over to assess dirt and damage.

    • Replace the mat if it is damaged.

    • Clean off the back of the Motherboard as necessary. The mat lies on top, so dirt and debris may build up. Repeat cleaning as needed.

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Conclusione

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

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