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Texas TI-34 solar scientific calculator from 1987
05-04-2016, 04:56 PM (This post was last modified: 05-04-2016 05:57 PM by jebem.)
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jebem Offline
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RE: Texas TI-34 solar scientific calculator from 1987
The PCB is fixed by plastic rivets in the keyboard area, and screws in the processor/display/solar panel area.

[Image: Texas_TI-34_solar_011.jpg] [Image: Texas_TI-34_solar_012.jpg] [Image: Texas_TI-34_solar_013.jpg]

Unfortunately it is not possible to remove the keyboard membrane because someone made a mistake when using strong glue to do a repair.

[Image: Texas_TI-34_solar_014.jpg]


SoC processor: Toshiba T7988 8740H Japan
PCB ref. 10TI34-21B

EDIT: Amazingly, the T7988 processor datasheet can still be found!

[Image: Texas_TI-34_solar_015.jpg] [Image: Texas_TI-34_solar_016.jpg]

Power supply limiter/regulator: a 1.75V LED and a 22uF capacitor in parallel with the 2.2V solar panel.

[Image: Texas_TI-34_solar_017.jpg] [Image: Texas_TI-34_solar_018.jpg]


LCD display. Zebra strip used to connect it to the PCB.

[Image: Texas_TI-34_solar_019.jpg]
Jose Mesquita
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RE: Texas TI-34 solar scientific calculator from 1987 - jebem - 05-04-2016 04:56 PM



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