I assume you are referring to this paragraph from the A-154 manual:
"Attention! If the controller and/or trigger board of the A-155 has
been modified (recognizable by additional electronic
parts soldered at the bottom side of the board) the modification has
to be cancelled. Otherwise the A-155 will
not work flawless in combination with the A-154. For details how to
undo the modification please contact technik@
doepfer.de."

I see no evidence of "additional electronic parts soldered to the
bottom side" of any of the boards in either A-155. I don't think
they have been modified.


--- In Doepfer_a100@yahoogroups.com , "selfoscillate"
<synaptic_music@...> wrote:

>
>
> hello david,
>
> i guess that you have those a155's which are modified,
> so the modifications have to be removed.
> have you checked your a155's for those additional
> parts mentioned in the manual
>
> best wishes
>
> ingo
>
>
>