SOEMTRON 220, Instruction Manual

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This manual has been reproduced from an English publication
Entitled
INSTRUCTION MANUAL
for use with the
SOEMTRON 220
ELECTRONIC CALCULATOR
We (
www.soemtron.org
) fully recognise the intellectual property rights of the originating source and will take
steps to remove, alter or further acknowledge this document if we are notified of any infringements. It has
been presented in good faith to aid in understanding the inner workings of the now vintage Soemtron 22x
range of electronic calculators.
It has been published by us to disseminate information about the Soemtron 22x range of electronic desk
calculators manufactured by V.E.B.
(*1) Büromaschinenwerk Sömmerda, as a project to gather and centralise
whatever information can be found about these increasingly rare early electronic calculators.
If you have or know of any information, books, drawings, circuits, hardware, test equipment (prufgerat) or
other memorabilia relating to the Soemtron 220, 221, 222 or 224 calculators, their trade names - Daro or
Soemtron, manufactured by - V.E.B. Büromaschinenwerk Sömmerda, please email us at -
mike@soemtron.org
This document has been scanned from an original book, processed through commercial OCR software to
regenerate the original German text and then automatically translated to English and imported into Microsoft
Word. Layout has been duplicated in line with the original document as much as possible to retain the flow of
the original document. Drawings, circuits and photographs are scans from the original document.
With this effort in mind some of the syntax presented here is a little strange to say the least!. Some portions
have been reworked to be more readable English text but there is obviously more to be done. If you can help
with this, or indeed have any helpful information or comments, please email us at -
mike@soemtron.org
Please use, and hopefully enjoy, this in information in the spirit in which
we undertook to generate it - as an information source for an interesting
piece of early calculator history before the advent of modern electronics,
in the days when “hands on” engineers thought through the problems and
challenges of designing equipment with little resources, to produce the
best end product they could.
February 2017
www.soemtron.org
mike@soemtron.org
*1 - V.E.B - Volkes Eigener Betrieb = Peoples Owned Company