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Repair LCDs Tandy EC-4025 (TI Collegiate)
09-23-2017, 06:07 AM
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RE: Repair LCDs Tandy EC-4025 (TI Collegiate)
(09-23-2017 01:16 AM)John Cadick Wrote:  I have a Tandy EC-4025. A couple of the LCDs have lost some segments.

1. Anyone know anything about the Calc?
2. Anyone have any tips on repairing/replacing LCDs?

This calc is identical to the TI Collegiate.

I gave a couple of the Texas variants. They can be acquired for low cost here in Europe (10 to 15 Euros for a used in good working condition machine).

Never tried to open them.

But in these machine generations, usually the lcd uses a cheap unreliable flat cable built from plastic where composite conductive material is deposited to make the trace wires.
This kind of conductive material will brake with aging.
I have fixed other models by simply applying hot air over the flat cable. I just use a regular air drier as the tool.

I have posted here before this technique applied on a Casio but can't find the message.

Jose Mesquita
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RE: Repair LCDs Tandy EC-4025 (TI Collegiate) - jebem - 09-23-2017 06:07 AM



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