Multifunction displays and cameras... does display turn on voltage to the cam, or ?
Situation is 2011 vintage Raymarine E120 W display. Have two analog video cams, Speco CNC-627M. When I go to video mode on the Raymarine one can choose 4 different cameras. I have 2 cameras, one in engine room, one aimed aft outside aft deck.
The one in engine room shows up fine on the display as camera 3. The other one...no signal. Yesterday found out "no signal" is because prior to my ownership of the boat someone pulled the cable out of the camera far enough that not only did it disconnect the wires from the connector internally, but as it pulled thru it caused the end terminals all 3 wires to end up touching each other !
So after separating the wires, I check voltage and get nothing...presume the touching caused a short somewhere.
The point of all this rambling is it would help to know how exactly these things are supposed to work to know where to look for a blown fuse or whatever. So the question is-
When you are in video mode on the Raymarine E120 and press, say, camera two....does the Raymarine turn on 12 volts to camera two....or do the cameras always have 12 volts "on" and the Raymarine only allows the signal wire activated for camera two ?