?I copied the following years ago from:? .? I hope that it helps you.

Neil

"One problem is: where to find the + 10V on the receiver board? I found, about 3 cm in front of the original connection of the red LED wires on the board, a pitch that gives me + 10V, looking for it with a tester between the ground and the various pitches. The photo below shows the cables to the original LED (where our circuit is connected instead) and the pitch I used for the + 10V (unfortunately I have a faulty camera, none of these photos are mine) Please, do everything very calmly and carefully: it would be a shame to spoil the receiver for a gross error!"