Introduction

Buttons will sometimes become cracked or damaged, or they may fall out. This guide shows you how to access, remove, and replace the buttons.

Image 1/1: Slide the battery cover to the right to reveal the batteries.
  • Locate the battery cover on the back of the case.

  • Slide the battery cover to the right to reveal the batteries.

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Image 1/3: Slide the metal tab to the right of the bottom battery. Image 2/3: Remove the 3-Volt Lithium Coin Cell Battery. Image 3/3: Slide the red lock down.
  • Slide the red lock up.

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

    • Remove the 3-Volt Lithium Coin Cell Battery.

  • Slide the red lock down.

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

    • Remove the 3-Volt Lithium Coin Cell Battery.

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Image 1/3: Unscrew four 7.15mm screws from the back casing. Image 2/3: Using the blue plastic opener tool along the seam of the case, pry off from the front casing. Image 3/3: Start prying from the bottom of the calculator, as the case hooks into the top.
  • Using a Torx T-6 star-bit screwdriver, unscrew four 7.38 mm screws from the battery housing.

    • Unscrew four 7.15mm screws from the back casing.

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

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

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Image 1/3: Remove 4 screws from the screen mount using the PHO bit. Image 2/3: Using the blue plastic opening tool, pry the motherboard up from the bottom case. Image 3/3: Using the blue plastic opening tool, pry up the screen from the screen mount.
  • Using a PH0 screwdriver from the 28-bit driver kit, remove 6 screws: 2 from the top and 4 from the bottom of the motherboard.

    • Remove 4 screws from the screen mount using the PHO bit.

      • Using the blue plastic opening tool, pry the motherboard up from the bottom case.

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

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Image 1/1: If obstructions are present, clear them.
  • Check the back of the buttons for damage or obstructions.

  • If obstructions are present, clear them.

  • Do not tilt the calculator, or buttons may fall out.

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Image 1/1:
  • If a button is damaged, use tweezers to lift the button out of the facing.

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Image 1/1: For all buttons, there is an extrusion in the upper left quadrant when looking at the back of the key. These should be aligned with the top of the calculator.
  • Insert new button, making sure that it is positioned properly.

  • For all buttons, there is an extrusion in the upper left quadrant when looking at the back of the key. These should be aligned with the top of the calculator.

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Conclusion

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

Calvin

Member since: 01/08/2015

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