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Texas Instruments TI-30Xa Solar School Edition (Virgina 2nd edition)

Date of introduction:  2005 Display technology:  LCD
New price:  $11.99 Display size:  10 + 2
Size:  5.9" x 3.0" x 0.50"    
Weight:  2.9 ounces Serial No:  
Batteries:  n.a. Date of manufacture:  mth 12 year 2004
AC-Adapter:   Origin of manufacture:  China (N)
Precision:  12 Integrated circuits:  Toshiba T6M79
Memories:  3    
Program steps:   Courtesy of:  Joerg Woerner

The Department of Education, Virginia requested Texas Instruments to disable the decimal-to-fraction key of the TI-30 Xa Solar School Edition. But in January, Dakota Brown, a 12-year-old at Carver Middle School in suburban Richmondís Chesterfield County, figured out that by pressing two other keys on his state-approved TI-30 Xa Solar School Edition for Virginia, he could change decimals into fractions anyway.

Texas Instruments recalled 160,000 calculators and replaced them with the 2nd edition of the TI-30Xa Solar School Edition for Virginia. It is obvious that this edition removed not only the [a b/c] key but even the misused [<-] key.

TI-30XA_Solar_SE_PCB.jpg (60357 Byte)Dismantling the calculator is not as exciting as expected. The TI-30Xa Solar School Edition for Virginia (2nd edition) makes use of a printed circuit board (PCB) known already from the TI-30 Xa Solar. We assume that the contacts of the two keys were removed but we couldn't proof it. 
From much higher interests are two other details:

TI-30XA_Solar_SE_Back.jpg (13733 Byte)The PCB was manufactured in week 47 of the year 2004 according to the date code 4704 which was end of November that year. The backside of the calculator reads N-1204C which interprets as "Manufactured by Nam Tai Electronics, Inc. in December, 2004". 

This early manufacturing date is very confusing because the newspapers stated in their June 8, 2005 prints:
"But in January, Dakota Brown, a 12-year-old at Carver Middle School..."

It is confusing how Texas Instruments manufactured already in December 2004 calculators with a fault corrected that was discovered in January, 2005.

Don't miss the third edition of the TI-30Xa Solar School Edition quietly introduced in 2013. 

 

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If you have additions to the above article please email: joerg@datamath.org.

© Joerg Woerner, June 26, 2005. No reprints without written permission.