Additional Pictures 


The keyboard assembly of the EC-1000 was manufactured by Texas Instruments.

The printed circuit board (PCB) of the EC-1000 uses similar components like the
TI-3000 but looks totally different. Not a typical design a TI calculator.
Please notice the magic number on the left side.

The solder side of the PCB with the etched 13-04-709-718 number.

If you have additions to the above article please email:

Joerg Woerner, February 26, 2003. No reprints without written permission.