Hi All, I'm replacing a switch in a piece of equipment. I'm looking at the circuit diagram and the actual circuit, and I notice that the diodes in the circuit aren't wired as they are in the diagram.:rofl: The HI signal is dc from 0-1 Volt and LO is ground. Is there going to be any significant difference between the two? I think they do the same thing, but in the real circuit one of the diodes is going to be conducting. While in the diagram neither of the diode are going to be conducting.