Additional Pictures 


The battery compartment of the SR-51 gives access to the electrical
contacts used to connect the PC-100 printer cradle.

The Main printed circuit board (PCB) of a SR-51 calculator. The brain of the
calculator uses the TMC0501 and a stack of 2 SCOM (TMC0522,523) circuits. 
A second PCB holds the keys, display and driver circuits.

The Display and Keyboard PCB of the SR-51 with two Texas Instruments
SN27882 display drivers and fourteen 7-segment LED-Displays. 

horizontal rule

If you have additions to the above article please email:

Joerg Woerner, November 24, 2008. No reprints without written permission.