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Texas Instruments TI-1706+ (Prototype)

Date of introduction:  (1996) Display technology:  LCD
New price:   Display size:  8
Size:  4.9" x 2.7" x 0.35"
 125 x 68 x 9 mm3
   
Weight:  1.7 ounces, 48 grams Serial No:  QA1 - 93293026
Batteries:  n.a. Date of manufacture:  mth 02 year 1996
AC-Adapter:   Origin of manufacture:  China (N)
Precision:  8 Integrated circuits:  
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

The TI-1706+ got again a rounder shape and different keys compared to the earlier TI-1706+ introduced three years earlier. This design theme was introduced with the TI-503+.

Dismantling this TI-1706+ Prototype manufactured in February 1996 by Nam Tai Electronics, Inc. in China reveals a clean design centered around an unknown single-chip calculator circuit bonded in Chip-on-Board (COB) technology directly onto a double-sided printed circuit board (PCB) and powered by four small solar cells.

Inspecting the PCB of this TI-1706+ Prototype brought our attention to three small marks reading TI-1706NP, JV302 and YK3552-1 confirming its split from the TI-106. With an early series production model of the TI-1706+ reading YK3552-2 do we assume that this calculator is in Revision 1 of its design (Schematics and PCB). We started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.

A similar housing with a tiltable display was used with the TI-1766+.



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

Joerg Woerner, May 15, 2020. No reprints without written permission.