Einleitung

For this guide you will remove all of the internal components in order to replace the buttons.

  1. Remove the calculator's protective cover.
    • Remove the calculator's protective cover.

    • Place the calculator face down.

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  2. Using a Phillips #1 screwdriver, remove the six 6mm screws from the back of the case and place them to the side.
    • Using a Phillips #1 screwdriver, remove the six 6mm screws from the back of the case and place them to the side.

    • Start from the notches on the top edge and use your fingers or a prying tool to carefully pry the back cover from the calculator.

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    • Use a Phillips #00 screwdriver to remove the two 7.5 mm screws holding the battery cover to the case.

    • Remove the battery cover without disconnecting either end of the blue wire.

    • Use your finger to move the battery cover to the side.

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    • Use the flat side of a spudger to remove the battery by lifting the bottom edge.

    • When inserting a new battery, check the polarity (+ or -) and insert the new battery with the + side on top.

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    • After removing the battery, use a Phillips #00 screwdriver to take out the 4.5mm screw directly to the right of the solar panel.

    • Do not disconnect any wires or you will need to solder them back on.

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    • Next, use a Phillips #00 screwdriver to remove the two screws located on each side of the striped ribbon between the two green circuit boards.

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    • Be careful not to scratch the gold lines on the circuit board since it may damage the circuit.

    • Carefully chisel off the 11 circular pieces that connect the lower circuit board to the calculator.

    • When reassembling the calculator, glue the lower circuit board back in place by dabbing glue into the holes that you chiseled.

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    • When removing the parts from the calculator be careful not to break any wires or ribbons. The solar panel, screen, and lower circuit board should remain connected throughout this guide.

    • Lift the top edge of the solar panel with a finger and slide it away from the circuit board to disconnect it from the calculator.

    • Carefully pry the screen out of the calculator with a prying tool or spudger.

    • Pry the lower circuit board from the calculator by inserting a prying tool between the base of the calculator and the circuit board.

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    • Grab one of the top corners of the gray rubber button pad and peel it off of the buttons.

    • If you turn the calculator over, all of the buttons will fall out.

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    • Locate the button that needs replacement and lift it out of the calculator with tweezers.

    • If the buttons do fall out, use the second picture to put them back properly.

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Abschluss

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

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Robert Sekerak

Mitglied seit 25.04.2014

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Team

Cal Poly, Team 11-52, Amido Spring 2014 Mitglied von Cal Poly, Team 11-52, Amido Spring 2014

CPSU-AMIDO-S14S11G52

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