Texas Instruments TI-510

Date of introduction:  1991 Display technology:  LCD
New price:   Display size:  8
Size:  5.4" x 4.1" x 1.15"
 136 x 106 x 29 mm3
Weight:  3.5 ounces, 99 grams Serial No:  
Batteries:  LR54 Date of manufacture:  mth 12 year 1990
AC-Adapter:   Origin of manufacture:  Malaysia (I)
Precision:  8 Integrated circuits:  Toshiba T9731BU
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

Nevertheless the identification number TI-510 points to a handheld calculator, it should be called a "small desktop" machine. Outside of Europe an almost identical product was sold as TI-1798 - the nameplate of a desktop calculator.

TI-510_PCB.jpg (67851 Byte)Dismantling this TI-510 manufactured in December 1990 by Inventec Corporation in Malaysia reveals a clean design centered around a Toshiba T9731BU single-chip calculator circuit soldered on a double-sided printed circuit board (PCB) and powered by four solar cells and a small LR54 (LR1130) backup battery like its identical twin TI-1798 manufactured for the European market. The battery wasn't used with the first production batches of the TI-1798 manufactured in Taiwan.

Inspecting the PCB of this TI-510 calculator brought our attention to a small mark reading 1OSB863-01B known already from the TI-1798. We started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.

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Joerg Woerner, November 12, 2003. No reprints without written permission.