Jc-120 Schematic | 90% Tested |

Feature a built-in power cord compartment, rotary switches for effects selection, and discrete components on the PCB.

Most "stereo" amps use one power section to drive multiple speakers. The JC-120 has two independent power sections, each pushing 60 watts to its own 12-inch speaker. Phase Mixing: jc-120 schematic

When looking at the schematic, pay close attention to the in the power supply section, as these are the most common failure points in older units, leading to excessive hum. Additionally, the Chorus/Vibrato selector switch often requires cleaning or replacement if the effect fails to engage. Feature a built-in power cord compartment, rotary switches