Noisy EFF board from a Roland JC-120G

[Phil_Pop]

I friend sent me a Roland JC-120G with only one working channel, I fixed the bad channel "just a blown fuse" I also notice
what sounds like an AM radio coming from the speakers when the EFF Board is installed in the amp.

Does any one have a schematic for the EFF board? the AMP serial number is Z9G1267.

Looks like the EFF board's number is E74366.

[joecool85]

Sounds like the effects board is picking up and amplifying stray RF signals.  Is the board properly grounded?