Jc-120 Schematic [hot] Jun 2026

Generally a mono spring reverb tank, though some schematics show it could be modified for stereo-like separation.

The JC-120 is essentially two independent 60-watt amplifiers in a single cabinet. This "true stereo" design is critical for its signature sound. Roland - Global Dual-Channel Preamp : The schematic features two distinct channels. (Normal) is a straightforward clean path, while jc-120 schematic

The amp operates with significant headroom to deliver its signature 120-watt (RMS) output (60W x 2), ensuring that the output stage does not distort easily. Serviceability and Considerations Generally a mono spring reverb tank, though some

The Roland JC-120 Jazz Chorus schematic represents more than just a wiring diagram; it is the blueprint for the "King of Clean," a solid-state powerhouse that has remained in production since 1975. Understanding its circuit is essential for both maintenance and appreciating how it pioneered the modern chorus effect. Roland - Global Dual-Channel Preamp : The schematic

| Symbol | Meaning | |--------|---------| | IC1A, IC1B | Dual op-amp (first half, second half) | | VR1–VRxx | Trimpots for bias / chorus clock | | TP1, TP2 | Test points (voltages listed in service notes) | | MN3002 | BBD delay line | | MN3101 | Clock driver for BBD |