Additional Pictures 


This SR-51-II (Version 1) was manufactured in September 1976 by
Texas Instruments in Lubbock, TX (Date code LTA 3677 wk 36 yr 1976).

The battery compartment of the SR-51-II with its Battery Pack BP6 removed.

The rear part of the housing showing the MAJESTIC MOLD description.

The SR-51-II with the rear part of its housing removed.

The compact assembly of the SR-51-II with three printed circuit boards (PCBs) and many interconnections. 

The calculator module with the keyboard assembly and power switch removed..

The calculator module with the power supply removed.

The Main-PCB with centered around the TMS0500 Building Blocks and two display drivers.

Close-up view of the TMC0501E Enhanced Arithmetic Chip.

Close-up view of the TMC0581 Double Scanning and Read-Only Memory Chip.

Close-up view of one of the two SN27882 Display Driver Chips.

Close-up view of the 12-digit DIS273D LED Display with magnifying lens.


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If you have additions to the above article please email:

Joerg Woerner, December 20, 2023. No reprints without written permission.