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Casio FX-991ES Plus Battery Replacement

Introdução

This guide demonstrates the process of replacing the battery for a Casio FX-991ES Plus calculator. The battery will need to be replaced when a dim or distorted display is noticed, or when the calculator stops working. The calculator is equipped with a solar cell that can provide power to the device, but if the battery becomes old or bloated, it should be replaced in order to prevent leakage that might damage the calculator. Although this calculator uses two-way power, it is inconvenient to depend on having to charge the built-in solar cell when the battery is dead.

O que você precisa

  1. Casio FX-991ES Plus Battery Replacement, Battery: passo 1, imagem 1 %32

    • Make sure the calculator is off. If not, turn it off by pressing the [Shift] button then the [AC] [OFF] button.

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  2. Casio FX-991ES Plus Battery Replacement: passo 2, imagem 1 %32

    • Flip the calculator upside down and lay it on a flat surface.

    • Do not press hard on the calculator to avoid turning it on by mistake.

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  3. Casio FX-991ES Plus Battery Replacement: passo 3, imagem 1 %32 Casio FX-991ES Plus Battery Replacement: passo 3, imagem 2 %32

    • Use a Phillips #0 screwdriver to unscrew the 1.6 mm screw on the battery cover.

    • Remove the battery cover.

    • Be gentle while unscrewing the cover, to avoid damaging it.

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  5. Casio FX-991ES Plus Battery Replacement: passo 4, imagem 1 %32 Casio FX-991ES Plus Battery Replacement: passo 4, imagem 2 %32 Casio FX-991ES Plus Battery Replacement: passo 4, imagem 3 %32

    • Use a spudger to remove the old battery. Insert it in the empty slot to pry out the battery.

    • Do not use a sharp item like a knife.

    • Do not use metal tools, to avoid damaging parts of the battery compartment.

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  6. Casio FX-991ES Plus Battery Replacement: passo 5, imagem 1 %32

    • Place the new battery into the compartment with the positive (+) side facing upwards.

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  7. Casio FX-991ES Plus Battery Replacement: passo 6, imagem 1 %32

    • Attach the battery cover and tighten the screw with a Phillips #0 screwdriver.

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  8. Casio FX-991ES Plus Battery Replacement: passo 7, imagem 1 %32

    • To reset the calculator, press the [ON] button.

    • Press the [SHIFT] button.

    • Press the [9] [CLR] button to clear the data.

    • Press the [3] button to choose "ALL".

    • Press the [=] button to agree.

    • Press the [AC] button

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11 outras pessoas executaram este guia.

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Zinab Alhamoud

Membro desde: 01/17/21

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Equipe

York University, Team S1-G4, O'Regan Winter 2021 Membro de York University, Team S1-G4, O'Regan Winter 2021

YORK-O'REGAN-W21S1G4

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4 comentários

Thank you so much! God bless you.

Igor Diniz - Responder

Can you send me one please

In Jaigaon india

chandra giri - Responder

La touche ON de ma calculatrice ne fonctionne plus comment faire ?

Emmanuel Prosper - Responder

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