Ok well I haven't been on here for a while now and I'm not sure if I'm in the right thread but.. I got this head a few years ago worked great. But one day I went to go turn it on and I'm getting very little voltage, the light will illuminate very faint and cut out and light up again. I also hear a relay click while this goes on. I sourced a schematic for the head but I'm not by it now to isolate the problem. Now what should I do to go about this I'm not terrible with electrical circuitry to repair it. But I'm not sure where to get parts and if anyone has suggestions on what the problem is or know where to get parts let me know thank you!!