Could use alittle help please. As soon as I plug the barrel jacks into the TIU it trips the the Z-1000. Nothing is plugged into the TIU other than the Z-1000. Any help would be appreciated.
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The TIU Barrel Jack is out of phase with the Hot and Common of the track inputs. Just reverse the wires going to the barrel jack and you should be good.
AGHRMatt posted:The TIU Barrel Jack is out of phase with the Hot and Common of the track inputs. Just reverse the wires going to the barrel jack and you should be good.
Matt, since he has no track inputs or other transformers connected, I doubt that's it. 
Off-hand, I'd say there's a problem with the TIU. Hard to say what it is, examine the aux power jack and see if something is bent inside. It could also be an internal component. I don't know if there's a TVS diode across the aux power, but I suspect there might be. It could be shorted.
I was confused by the post. He states when he plugs in the barrel jacks, (plural), into the TIU it shorts. Is he plugging a barrel jack into the aux input, or does he have an adapter on the barrel jack and plugging it into fixed one. If the latter, I would guess he has a shorted diode on fixed one.
If he's plugging it into FIXED #1 and it's tripping, I'd agree. I was reading that he was plugging it into the AUX jack, but I don't see that specifically stated.
Once again, we're guessing because of no clarity of the problem description. 
I took it as two barrel plugs. One black and one red! both from the Z1000.
I just love guessing
My bad. Read too much into the question.
Matt, it's hard to know exactly what he's doing, as pointed out he said "jacks", so I have no idea what is actually going on.
If he has a phasing issue between the aux power and the channel input, you could still be right. 
Sorry for confusing you the way I presented it. I have my Aux power supply disconnected. When I plug in the 50-1017 TIU barrel jack adapter into the Z-1000 is when it trips the Z-1000. If I just have the Aux power supply connected to TIU the red light on the TIU is lit.
What is connected to the TIU, and where is it connected? You still really didn't clarify exactly what is connected where!
disconnect the TIU from anything else. Apply power to fixed #1 input. Does it trip?
When I apply power to fixed input 1 with everything disconnected it trips the Z-1000.
I've been sitting on the sidelines watching this. Try moving the power to Fixed Input 2. If need be, you can change your Variable channels to Fixed. It may be just a bad channel.
Finally! It's most likely the TVS diode across FIXED #1, a fairly common issue.
If you connect AUX power and then power any other channel (not FIXED #1), does that channel work? If so, it points to the FIXED #1 channel. As I said, by far the most common short on the fixed channels is the TVS diode.
