Texas Instruments TI-31 SOLAR (China)

Date of introduction:  1987 Display technology:  LCD
New price:   Display size:  8 (5 + 2)
Size:  5.5" x 2.8" x 0.45"
 140 x 72 x 11 mm3
Weight:  2.8 ounces, 78 grams Serial No:  699531
Batteries:  n.a. Date of manufacture:  mth 10 year 1988
AC-Adapter:   Origin of manufacture:  China (T)
Precision:  11 Integrated circuits:  Toshiba T6974S
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner 
    Download manual:   (US: 3.2 MByte)

The production of the TI-31 SOLAR was shifted in 1987 from Japan to China without changing any part of the calculator.

This TI-31 SOLAR manufactured in October 1987 by Toshiba in China makes still use of the T6974S single-chip calculator circuit introduced already in 1984. 

The later Italian version of the TI-31 SOLAR looks totally different. 



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Joerg Woerner, December 5, 2001. No reprints without written permission.