Author Topic: Noisy EFF board from a Roland JC-120G  (Read 464 times)


  • Chipper
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Noisy EFF board from a Roland JC-120G
« on: April 08, 2019, 09:25:11 PM »
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.


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Re: Noisy EFF board from a Roland JC-120G
« Reply #1 on: April 16, 2019, 01:58:30 PM »
Sounds like the effects board is picking up and amplifying stray RF signals.  Is the board properly grounded?
Life is what you make it.
Still rockin' the Dean Markley K-20X
"New" amp: Fender Frontman 25 DSP (FM25DSP)


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