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Texas Instruments TI-52 (Italy)

Date of introduction:  1987 Display technology:  LCD
New price:   Display size:  10 + 2
Size:  3.5" x 6.0" x 0.65"    
Weight:  4.0 ounces Serial No:  
Batteries:  2*LR44 Date of manufacture:  wk 02 year 1990
AC-Adapter:   Origin of manufacture:  Italy
Precision:  12 Integrated circuits:  Toshiba T7767S
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner
    Download manual, Addendum: (DE, FR: 11.8 MBytes)
(EU: 0.9 MBytes)

In 1987 the complete design of the TI-52 and its sibbling TI-30 Galaxy was revised and production of the calculators shifted from Japan to a Texas Instruments facility located in Rieti, Italy.

TI-52_PCB.jpg (110620 Byte)Dismantling the featured TI-52 manufactured in February 1990 and comparing it with an original TI-52 assembled in Japan reveals some interesting differences. The original design makes use of two rigid printed circuit boards (PCBs) while the second generation is based on only one, two-sided flexible PCB.

TI-52_Detail.jpg (29827 Byte)The position of the display was moved away from the upper boarder of the calculator housing to allow the already from the TI-1030 known technology of contacting PCB traces with the LCD display using a metal clamp.

TI-52_Bat.jpg (30261 Byte)Even the battery compartment was redesigned and the orientation of the two batteries changed. 

 

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

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