Doepfer

--- In Doepfer_a100@yahoogroups.com, erase <list@...> wrote:
>
> Hi, just got a used A141 and there is some trouble with it, just  
> wondering if there is a quick fix to this. Problem:
> 
> it seems to not shut the envelope voltage correctly, the led is 
there  
> although I have no gate input and when I drive it with my MCV24 it 
is  
> very hard to get it to shut, doing a fast noteon/noteoff simply  
> leaves it "open". not at all what my A140´s acts like. of course I  
> have nothing else plugged into it (except adsr out when testing)

If you have nothing in the 'gate' socket and the LED is still on with 
the 'R' pot set at 0, then there is a problem with the module, as 
(unless there is a newer version than mine, marked 'version 1 1996') 
there is no internal connection possible of the gate to the bus 
(unlike the A-140), so (on a working module) with no gate signal and 
a fast release the envelope should quickly go to zero and the LED 
should go out.

If the ICs are socketted (they are on mine), check that they are all 
seated properly by giving them a firm push. Also, are there any signs 
of obvious modification by the previous owner? - there should be 6 
wires between the 2 boards: 5 are bare wire; the sixth is longer and 
insulated, marked 'gate' at both ends.

Tim