hi Dieter! thank you from my heart for taking the time to answer to me.
i followed your intructions and checked the board; i can't see the labels for gate/cv, but i compared my module to this photo
http://www.doepfer.de/A100_pictures/doepfer_a190.jpg
[how great is that you have photos of the boards on the doepfer site!]
and it seems that in my module, there is a resistor at the right place.

i posted a photo of my module so you can verify that i'm not mistaken:
https://groups.yahoo.com/neo/groups/Doepfer_a100/photos/photostream/lightbox/1058788174 orderBy=mtime&sortOrder=desc&photoFilter=ALL#zax/1058788174

so, as not to bother you again with the subject, if my module is indeed a later model, i can send midi data through the A190-1 and at the same time send gates from LFO, or cv/gate from external units [for example, a Roland MC202 sequencer] with no fear of damage

again thanks + respect
Yiannis.