I thought I'd share what I've spent the past week working through;...........
The top brain section of my B9 previously housed "one of three" V3 EZB's that animated him. Now that I'm converting over the V4. I found that the new version of EZB is just a bit to tall to fit into that tight space by about 1/4 inch when the servo cables are plugged into the ports. So to keep the animation working that I wanted I had to transfer the functions that the old V3 handled down through the neck of B9 onto the EZB V4 that sits in the torso. So, after running the extra 5 feet of wire I thought I had everything ready so I turned on the power and............ Nothing, *tired* The brain was dead. *tired* I had blown the fuse protecting this circuit. Thank goodness I had installed fuses in crucial circuits. Well, maybe.........
After a few days of trying to find the cause of the obvious short and a few packs of 2 amp slow blow fuses I decided to leave the fuse out and place an amp probe across the open hoping to find out just how much amperage I'm pulling. Ya, that wasn't such a good idea because when I switched on the power I watched the amp meter quickly move up to 13 amps (a full 11 amps above it should have been!) *eek* . What happened next was straight out of an episode of Lost in Space; I heard a loud sizzling, saw a flash of light above B9 and then a cloud of foul smelling smoke rolled out of the brain. I looked around for Dr. Smith and realized that I'm Dr Smith this time. *blush*
OK, I still have a problem that I cant find but at least now I know what area to look in. When I reopened the brain lid the first thing I see are fried and melted wires that feed the lower finger lights, a blown transistor on the Light Controller board and a blown diode.
The short was obviously in the very thin wires leading down to the finger lights. Here's what this area looked like before the mishap:
I decided to rewire the thin wires in the brain to thicker and better insulated wire thinking and hoping the short may be in that nest of wires somewhere. Here's the finished look without the V3 installed. Notice the blown diode on the diode board in position #1. I missed this at first:
OK, All's well? No. *tired* Power up and another blown fuse. The Only place left to look is inside the brain cup. What I found was one of the very thin finger light's hot wires got snagged behind the piano wire that the finger lights pivot up and down on. It broke the insulation on that wire and caused a short to the cup's aluminum body. This must have happened when I pulled the new control wires through the cup that I ran down into the torso to that V4 EZB. Here's what it looks like when all is well with no problems:
Once I cleared the short and repaired the damage to the insulation all works great! What I used to repair the insulation was to simply paint on some liquid electric tape.
All is truly well now and both B9 and myself are happy campers!