Introduction

For this guide you will remove all of the internal components in order to access the front cover.

Image 1/2: Place the calculator face down. Image 2/2: Place the calculator face down.
  • Remove the calculator's protective cover.

  • Place the calculator face down.

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Image 1/2: 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. Image 2/2: 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.
  • 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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Image 1/2: Remove the battery cover without disconnecting either end of the blue wire. Image 2/2: Use your finger to move the battery cover to the side.
  • 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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Image 1/1: When inserting a new battery, check the polarity (+ or -) and insert the new battery with the + side on top.
  • 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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Image 1/1: Do not disconnect any wires or you will need to solder them back on.
  • 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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Image 1/1:
  • 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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Image 1/1: Carefully chisel off the 11 circular pieces that connect the lower circuit board to the calculator.
  • 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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Image 1/3: 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. Image 2/3: Carefully pry the screen out of the calculator with a prying tool or spudger. Image 3/3: Pry the lower circuit board from the calculator by inserting a prying tool between the base of the calculator and the circuit board.
  • 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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Image 1/1: If you turn the calculator over, all of the buttons will fall out.
  • 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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Image 1/2: If the buttons do fall out, use the second picture to put them back properly. Image 2/2: If the buttons do fall out, use the second picture to put them back properly.
  • 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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Image 1/1: Using a spudger, undo the 5 clips around the edge of the casing that connect the front cover to the calculator.
  • Empty the buttons into a bag or place them somewhere that they will not be lost.

  • Using a spudger, undo the 5 clips around the edge of the casing that connect the front cover to the calculator.

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Image 1/1:
  • Pry the front cover off of the calculator with a prying tool from the bottom up.

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Conclusion

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

Robert Sekerak

Member since: 04/25/2014

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4 Guides authored

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Cal Poly, Team 11-52, Amido Spring 2014 Member of Cal Poly, Team 11-52, Amido Spring 2014

CPSU-AMIDO-S14S11G52

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