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Texas Instruments TI-82 Teardown

撰写者： bushing
发布于： November 10, 2010
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拆解

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简介

This is a basic teardown of the venerable TI-82 calculator.

这个拆解是不是维修指南。 要维修你的的Texas Instruments TI-82，请使用我们的维修手册。

  1. The calculator comes with a matching protective shield which slides down over the front; when the calculator is in use, you can slide it over the back. This is a nice touch, as it makes the cover much more difficult to lose.

    • The calculator comes with a matching protective shield which slides down over the front; when the calculator is in use, you can slide it over the back. This is a nice touch, as it makes the cover much more difficult to lose.

    编辑

  2. Flip the device over to access the battery cover. Using a spudger, pry the release tab down and then pull the battery door up and off the calculator. Remove:

    • Flip the device over to access the battery cover.

    • Using a spudger, pry the release tab down and then pull the battery door up and off the calculator.

    • Remove:

    • 2 7.2mm Phillips #0 screws

    • 1 15.3mm Phillips #0 screw, and a battery retaining clip.

    • The CR1616 coin cell battery preserves settings and programs in memory while the main batteries are being changed.

    编辑

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  4. Insert a spudger into the seam between the two halves of the case, and pry it apart.

    • Insert a spudger into the seam between the two halves of the case, and pry it apart.

    • Watch out for corrosion in older calculators around the battery terminals -- this is why you should never leave batteries in electronics for extended periods of time.

    编辑

  5. Opening the two halves of the calculator reveals a foil shield over the rest of the electronics.

    • Opening the two halves of the calculator reveals a foil shield over the rest of the electronics.

    • Remove four Phillips screws to access the electronics underneath, then pull the shield away.

    编辑

  6. ... And, here's the guts of the thing.

    • ... And, here's the guts of the thing.

    • SRM20255LLM10 / F4ZM1938 (32Kbyte SRAM)

    • LH531GP4 (Mask ROM)

    • T 84C00AM-8 (Z80 CPU)

    • Toshiba / TC14L010AF / 1273 9506EAI (ASIC)

    编辑

  7. Remove the remaining Phillips screws. The screen and main board will lift out, leaving the membrane keypad in the front case.

    • Remove the remaining Phillips screws.

    • The screen and main board will lift out, leaving the membrane keypad in the front case.

    编辑

作者

bushing

于2010年04月23日注册

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创作了13篇指南

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