> Can anyone tell me which way round the power lead to the 197 module goes
> I cannot see any indication on the circuit board - is it red line
> on the left (at the edge of the board) or on the right (next to C2)
>
> Cheers, Nick

The red stripe (-12V) has to show to the edge of the board (not towards C2).

Best wishes
Dieter Doepfer