Dear Märklin Friends,
I 've just put again in its operational condition my Märklin Digital Layout, controlled by a CS1. Well, I just reconnected these 2 Signals, which I switched only in analogue mode (red and green wires), because I do remember there were too many issues using them digitally. Anyway, for some reason I can't explain to myself, the Signal is constantly on "Stop" mode (red) e and I can't switch it to "go" (green). I've tried to take off the power of the Trafo, but I can't still now have any control on it. You must know that the layout has been inactive for many years. Any suggestion to make it switching back to "Go" will be very appreciated. The Lichtvorsignal is perfectly lighted on, but anyway it doesn't switch in the same way as the 76393,
Best regards
Prof. Stefano Rocca

Dear Rüdiger,
the wires are in such way: cables yellow and brown to the Analogue Märklin Trafo (light and O output); cables red and green to the O of the Analogue Trafo (white plastic case), but they're supposed to be connected to a 7072; the two red wires to B of the C-tracks (B). In such type of Signals where are the coils? I'ven't checked them because I do suppose there aren't any coils. Tomorrow mornng I'll bring a picture.
Best regards
Stefano

Just go to Märklins homepage and search for the signal. There you'll find the manual for the signal with the analogue operation.

There's only one coil which is the relay for turning on/off the power to the track/catenary. The red and green cables are supposed to be connected to 72720. 72720 gives a short impulse to one of the contacts to switch over from red to green or green to red.

Your permanent connection of red and green to the Trafo's O- output might be the fault - connect only either, and only shortly (like 72720 or 7072 would do), to change the signal picture.



I have to apologize for my misconception; no coils, you are right.