Soemtron 224 Downloads

Soemtron logo of unknown origin

This page has downloadable drawings and information for the Soemtron ETR 224 electronic calculator.  Updates and corrections to the drawings are uploaded on an ad-hoc basis as they come to hand, but we do not accept responsibility for their subsequent use.  The files will usually be in pdf format so a current copy of an Adobe Acrobat reader will be needed which you can download here.  To download the files right click the relevant link and select "file save as ....", to view the file directly just click the link, assuming you have a pdf viewer installed !.  All files on this website are ©2007- www.soemtron.org, group websites or the files respective owners.

If you know of, or have any more history or information about the Soemtron brand, the 220 222 224 or the very rare 221 machine, test equipment (Prüfgeräte) or you just know more about the Soemtron companies in general then please let us know, contact us here.


Soemtron 224 Circuit and Logic diagrams -
(See the "Snagging list" file for the current list of things to check with our ETR 224)
 
Power supply and mains wiring circuit updated 19/May/2011
Printer mechanical assembly wiring circuit updated 19/May/2011
Digit position photo-amplifier circuit circuit
logic
updated
pending
29/Jan/2010
Solenoid driver boards and mounting bracket wiring circuit circuit
logic
updated
pending
19/May/2011
 
Unknown board function wiring circuit
logic
updated
pending
19/May/2011
 
Keyboard circuit and encoding circuit
logic
updated
pending
23/June/2011
 
 

 


1 V.E.B. Volks Eigener Betrieb, or Peoples Owned Company  
2 Büromaschinenwerk Office Machine Works  
3 Group websites www.soemtron.org
www.soemtron.com
www.pdp-7.org
www.pdp-7a.org



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