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Title: Help - Roland JC 120 no chorus
Post by: painkiller on February 13, 2021, 03:13:14 PM

Hi to all

I have an old 1976 Roland Jc 120.
Vibrato is working - chorus not :-/
I changed all Capacitors on the PCBs - I refurbished the Switch of Vibrato / Chorus.
I checked the speaker wiring.
I really don't know what else to do -
Does someone have an idea ?

Thanks !!

Title: Re: Help - Roland JC 120 no chorus
Post by: Jazz P Bass on February 14, 2021, 01:37:09 AM

There are many different schematics on this amp model.
here is the '1982'.
See if it is close.
You need to troubleshoot the circuit.

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Solid State Amplifiers => Amplifier Discussion => Topic started by: painkiller on February 13, 2021, 03:13:14 PM