简介

If one or a number of your keys are broken or cracked, causing malfunctions in operation or dangerous sharp edges, use this guide to safely replace them.

  1. Remove the battery cover.
    • Remove the battery cover.

    • Remove the AAA batteries from the calculator.

  2. Remove the 5mm Philips #00 screw holding backup battery cover.
    • Remove the 5mm Philips #00 screw holding backup battery cover.

    • Remove the backup battery cover.

    • Use plastic opening tool to remove the backup battery. Place the tool in the small cut-out next to the battery and pry the battery out.

    • Be careful, the backup battery is spring loaded and may shoot up when you remove it.

    • Unscrew the six 7.5mm T6 screws on the back case. You will need to use a screwdriver with a long and skinny head.

    • Pry back case off. Insert the plastic opening tool in the track for the protective cover and pry the halves of the case apart.

    • Keep the screen face-down during this step. Only the motherboard is attached to the face-plate and the screen may fall out.

    • Remove the eight (8) 5mm Philips #00 screws on the motherboard.

    • Carefully remove the motherboard and screen. Grab the board by its side with one hand and the screen with the other. Carefully lift the two parts up.

      • Keep the face-plate face-down to prevent the keys from falling out.

    • Remove light gray rubber keyboard mat.

    • Keep your calculator face down to ensure the individual keys do not fall out.

    • Clean the contacts on the keyboard with a soft cloth.

    • Use tweezers to remove one key at a time.

    • Be sure to keep them organized if you are taking out multiple keys.

结论

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

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Jared

于2012年10月02日注册

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