TIU Fixed 2 Voltage Leak??

Question would be, does it do it with a load on the output?

Yes, a rather light load.  A friend built a signal bridge with five pairs of LEDs that are powered by Fxd2.  That's the reason I noticed the voltage.  It was enough to make five LEDs glow very slightly for the 3 secs when powering the TIU.

See if a bit more loading will change that.  I'm surprised 1/4V does anything for an LED, it doesn't do it here.  I have to get to a bit over 1.25 volts before any visible light comes from a standard red LED, those have an operating voltage of 1.5 volts, the typical for colored LED's.  I don't know of any LED's that operate much lower than that.

Did the friend include any capacitors in his circuitry?

Nope.  Just the LED and a resistor.

I have to believe the voltmeter reading is not correct, there has to be at least some spikes of greater voltage coming out to light the LED at all.  It doesn't take much, but voltage is key.

C'mon guys, the question is why is there any voltage from Aux Pwr appearing on Fxd 2.

I'd guess it could be as simple as coupled AC from the KW, even though the transformer is at zero volts.  I can tell you that I see nothing with a PH180 switched off with the Rev. L TIU powered in aux mode.

I can't  see how the aux power supply can jumper over to fixed 2. We know the pin on the tiu's aux power jack is common to the black on fixed 1 but how does it get over to fixed 2?

What's  common to the kw and z-500 ? the wall outlet  I suppose.

Is there track connected anywhere on the outputs of the tiu???

The ZW and KW are plugged into the same power strip, which is OFF.  The handles of the ZW and KW are positioned to supply 16v when powered.  The outputs of VAR1, FXD2 and VAR2 are connected to blocks that have a common return.

What happens if you disconnect the KW from the FIXED 2 input and then power the whole rig on?  How about if you connect nothing to the outputs?

There's doubtless some stray power in a very small amount, but it's pretty hard to know where it's coming from with everything connected.