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Thread: Roland JC-120 BB03539

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    Roland JC-120 BB03539

    Jazz Chorus amp chorus and vibrato not working. I think this is the 1984 model. I have opened it up and am looking for help. Trying to figure out what is what and canít find a schematic. Any advice may help. Chorus and Vibrato might be very faint, not deep at all. It worked for years and years but would love to get it working again.

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    Senior Member nevetslab's Avatar
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    Theses are the two JC120 schematics I have. Usually will get you close even if they're not exact as being worked on.

    roland_jazz_chorus Schematic.pdf
    Roland-JC120-JC160 Schematic.pdf

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