DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-1750 (3rd design)
Date of introduction: | 1978 | Display technology: | LCD (yellow) |
New price: | Display size: | 8 | |
Size: | 4.5" x 2.7" x 0.35" 115 x 68 x 9 mm3 |
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Weight: | 2.3 ounces, 65 grams | Serial No: | 167773 |
Batteries: | 2*LR44 | Date of manufacture: | mth 02 year 1978 |
AC-Adapter: | Origin of manufacture: | Japan | |
Precision: | 8 | Integrated circuits: | Toshiba T3709 |
Memories: | 1 | ||
Program steps: | Courtesy of: | Joerg Woerner | |
Download manual: | (US: 0.8M Bytes) |
This TI-1750 looks identical to the 2nd version but uses an even cheaper internal construction. The connection between the LC-display to the printed circuit board (PCB) was changed from the former discrete coil springs to a zebra-stripe (an arrangement of conductive and isolation rubber pieces).
Before the TI-1750 was later replaced with the similar TI-1750-II it got a massive cost reduction. Don't miss the 4th design of the TI-1750.
Read more about the history of the TI-1750 here.There
are different rumors which companies designed and manufactured the TI-1750,
usually you get Toshiba and Sharp.
Comparing the 4 versions with similar calculators manufactured by Sharp we could
reject this speculation. On the other hand we can’t believe that Toshiba used
a calculator chip from competitor Sharp.
Searching
all parts for a hint to possible manufacturers gives you the Sansyu
logo.
Press the X-RAY
button and view the internals of a TI-1750.
Watch carefully and you'll notice the odd battery compartment !
(Pictures provided by Edward Soudentas)
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, May 16, 2002. No reprints without written permission.