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Additional Pictures 

 

This BA-20 Profit Manager Calculator was manufactured in July 1990 by 
Compal Electronics in Taiwan (Date code C-0790 mth 07 yr 1990).

The printed circuit board (PCB) of the BA-20 is centered around a n Inventa LI3163 single-chip calculator circuit.
Please notice the empty space for the backup battery and the contacts for the omitted switch.

Close-up view of the clock module.

  
The printed circuit board (PCB) of the clock module.

Close-up view of the single-chip clock circuit.

Close-up view of the Inventa LI3163 single-chip calculator circuit.



 Close-up view of the PCB-Mark of a BA-20.


horizontal rule

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

Joerg Woerner, April 5, 2020. No reprints without written permission.