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Toshiba LC-833WA

Date of introduction:  1978 Display technology:  LCD (yellow)
New price:   Display size:  8
Size:  5.3" x 2.7" x 0.35"
 135 x 68 x 9 mm3
   
Weight:  3.0 ounces, 86 grams Serial No:  D58606
Batteries:  2*LR44  Date of manufacture:  year 1978
AC-Adapter:   Origin of manufacture:  Japan
Precision:  8 Integrated circuits:  Toshiba T3566
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

LC-833WA_P1.jpg (164123 Byte)This calculator seems to be identical to the TI-1790 introduced by Texas Instruments in 1978, too. Main differences are the design and arrangement of the keys.

LC-833WA_Disp.jpg (94317 Byte)It combines a basic calculator, a clock, alarm-time and stopwatch function in a compact housing. Don't miss the original LC-831W using two discrete displays for the calculator and clock functions.

A perfect copy of this calculator was sold in the former GDR (German Democratic Republic - Eastern part of Germany) as MR411 and later MR413. Canon of Japan used similar hardware in the LC Quartz.

Dismantling the LC-833WA reveals a clean layout centered around the Toshiba T3566 single-chip calculator circuit, a tiny crystal for the timekeeper and a small buzzer. Please notice that the shape of the printed circuit board (PCB) is identical with the TI-1790 and even the layout has only slight differences.

Compare this calculator with the TI-1790.

The keyboard layout was later changed, notice the combined RM/CM key on the LC-834WA.



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

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