All about the Roland Jupiter-series

Hi all

I have a later jp-8 (14 bit version) with a groove electronics retrofit

i have a problem with the output (both xlr and balanced) for the lower 
part.

there always seems to be a squealing (about 10khz) coming out of it.

fine i can gate the channel, but the noise is still mixed with any 
sounds coming from that output.

also, when i hit tune, you can very quietly hear the squeal again

is it some kind of power supply issue?

thanks for any replies in advance :)

phil
cosmic groove transmission