Elektor Formant Modular

Thanks Kris.. I need all the help I can get (maybe we should take 
this off list? Dont wanna annoy the old pros's???)

> Is it a new module MSS2000 or the old one.
I think it must be one of the old ones? (how new is new? It wwas 
originally a school project for a Spanish friend, in the early 80's)

> On the schematic the solder pads are labelled, If you're lucky 
your board 
> will also be labelled.

It is...

> if not match it up with the one in the book and find all your 
power lines.
> 
> By the sounds of things your supply has went wrong or is being 
connected 
> wrong.
> 
> Test the wires, connect your black probe to the ground of the 
power supply 
> to wall socket. 

What do you mean here? touch black probe on gound of the circuit.. 
then.. what with the wall socket?


then the red to the Ov line out. This should read 0v,

Aha.. NOW I get it.. sorry...

OK TRIED THIS: COnnected BLACK to earth part of my wall socket
(actually power strip earth) and touched RED on all parts of the 
PSU..
I get OV everywhere (actually I get minus 0, but I gues that 
nothing?)

 
> Then test +15v and -15v the same way. LABEL your wires at this 
point.
> Confirm this section before doing anything else.

if I touch BLACK to the Ov out of PSU and red to +15 I get +15


if I touch BLACK to the Ov out of PSU and red to +5 I get +5


if I touch BLACK to the Ov out of PSU and red to -15 I get 0.

So I think the -15 is gone somewhere?

BTW. I notice that there is NO connection from the earth cable in 
the mains lead, blue and brown go to their places on the 
transformer, but the earth is cut off, it this a thing? SHould,nt it 
be connected to earth somewhere????????

Mark...



>