FX500 hum

[movinginslomo]

got my hands on one for very cheap, trying to run it through the effects loop in a hx stomp. Lots of hum and redline, even though I'm using the -10db input and instrument level send/returns on the hx stomp. Any fixes for the hum? It came with an original (I assume) 12v yamaha pa-3 power supply. I've tried to get the unit as far away as I can from my computer monitor and the hx stomp as possible. I'm hoping it doesn't need a recapping. Anyone had to service one of these? There is scant info out there. I have a keeley realizer so I don't really need this unit but I wanted to play around with it anyways

[cestlamort]

How does it do when guitar > fx500 > amp? (Or headphones)
Also maybe test both front and rear inputs.

[movinginslomo]

Tested in front of hx stomp, tested both front and rear. tried direct from unit into SSL2 interface. Even tried direct with headphones. It be hummin.

[ryland]

Do you have another power supply that you could try with it?

[movinginslomo]

Damn. No. could a faulty power supply be the cause?

[ryland]

It is possible, but it's most likely the filter caps. I was just trying to see if you could rule out the power supply before needing to open it up...which is honestly not that bad if you can solder.

[movinginslomo]

It is possible, but it's most likely the filter caps. I was just trying to see if you could rule out the power supply before needing to open it up...which is honestly not that bad if you can solder.

Yea time to figure out where the filter caps are