DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-1795+ (1998 Nam Tai)
|Date of introduction:||1998||Display technology:||LCD|
|New price:||Display size:||8|
|Size:|| 5.1" x 4.2" x 1.0"
130 x 106 x 26 mm3
|Weight:||3.3 ounces, 94 grams||Serial No:|
|Batteries:||n.a.||Date of manufacture:||mth 05 year 1998|
|AC-Adapter:||Origin of manufacture:||China (N)|
|Program steps:||Courtesy of:||Joerg Woernerr|
first glance looks this TI-1795+ almost identical to the first design of the TI-1795+,
main differences are the slightly rounder design of the housing and a new layout
of the keys in the left column.
Dismantling this TI-1795+ manufactured in May 1998 by Nam Tai Electronics in China reveals a clean design centered around an unknown single-chip calculator circuit mounted in Chip-on-Board (COB) technology on a small double-sided printed circuit board (PCB) and powered by small solar cells. A larger, single-sided PCB is used for the keyboard and connected with a short flat flexible cable (FFC). Please compare with a TI-1795+ manufactured three month later by Kinpo Electronics still using a conventional Flat Pack (FP) housing and just one PCB.
Inspecting the PCBs of this TI-1795+ calculator brought our attention to two small marks reading TI-1795NP JP302-2 resp. TI-1795NP JP307-2 while its stable mate manufactured by Kinpo Electronics is marked with SD29-11. We spotted a very similar PCB-Mark already with the Radio Shack EC-2006A and Privileg SOLAR 31. We started compiling a list of the PCB-Marks on calculators manufactured by OEMs for Texas Instruments.
The Second Generation of the TI-1795+ was introduced in January 1996 and an interesting journey around the Globe began:
TI-1795+ Second Generation Prototype
Kinpo Electronics (Taiwan),
• TI-1795+ Second Generation Cal-Comp Electronics (Thailand), October 1995 and April 1998
• TI-1795+ Second Generation Nam Tai Electronics (China), May 1998
• TI-1795+ Second Generation Kinpo Electronics (China), August 1998
Within four years this TI-1795+ was replaced with the TI-1795SV (SuperViewTM). Compare it with the TI-1800 and the odd TI-808.
A similar calculator with 10 digits of display capability was sold with the TI-1796+.
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© Joerg Woerner, March 16, 2020. No reprints without written permission.