CASIO fx-5200P Scientific Computer teardown

[jebem]

(06-11-2019 07:31 PM)foroplus Wrote:  Wow. According to the dates printed on the chips and the back metal cover, your calculator is dated as of 1992, while mine is on 1985.
That means this machine was a bunch of years on the market.

That was the reason I didn't put a manufacturing date on this specimen as I usually do after dismantling my machines.

I am not sure about the Japanese date codes. They are not well known and documented imho.

Casio was well known for releasing new models every single year, meaning that each model would have relatively short production lifetime, maybe 2 or 3 years.

1985 to 1986 is the mentioned production years for this model in the usual internet portals, but no one knows for sure.
Probably not even Casio would know by now.

In my calculator I am sure the chips are the original ones, as there is no marks of resoldering anywhere.
So a lifespan of 7 years in production seems improbable for Casio, but we never know.