RustyM

Thanx again for the feedback. I suppose it could be the jackplate assembly (also not available I understand.) It may not be sending the needed "handshake" acknowledgement to let the XPS know there's a guitar attached. I may pull it out and do a thorough contact cleaning (I use DEOXIT D5), check cold solder joints, etc. (I of course ruled out the TRS cables I've tried.) Can you tell me if it works/doesn't work with battery power only tells me anything about the integrity of the jackplate? This problem has been too fleeting since 2004 that it's very hard to track down.

I'm not talking about the PX-2 PS. That's ok. I'm talking about the output voltage of the XPS-DI, which supplies the voltage to the guitar, via the TRS (stereo) chord connected to it, when not using the battery power option. Thanx for the feedback. If it should be around 8Vdc, and mine measures exactly 7 Vdc, that's probably why guitar occasionally cuts out. I'm guessing the 7Vdc is right on the threshold for sustained operation. Does anyone know if there are schematics available? It may be something as simple as a leaky cap or faulty regulator. (Maybe there's a trim pot inside of the XPS to adjust its output voltage if I'm lucky?)

I'm not talking about the PX-2 PS. That's ok. I'm talking about the output voltage of the XPS-DI, which supplies the voltage to the guitar, via the TRS (stereo) chord connected to it, when not using the battery power option.

Does anyone know what the correct DC voltage should be, coming out of my XPS DI box, measured at the "ring" part of the TRS cable? (Tip being signal; sleeve being GND) I'm measuring 7 volts on mine. Maybe why it's failing now? (Guitar and XPS 18 years old.)