The JC-120 (1975–present) is famous for its and built-in stereo chorus/vibrato . Techs need the schematic to troubleshoot:
These models feature stereo FX loops and modern component layouts. Their specific Circuit Diagrams can be found in newer service manuals. Official Schematic Libraries jc-120 schematic
Could you clarify if you are looking for a (like a BBD chip or transformer) or a physical replacement part like a speaker or knob? The ultimate JC-120 thread The JC-120 (1975–present) is famous for its and