Introduced in 1975, the JC-120 was a revolutionary product from Roland. At a time when tube amps dominated the market, Roland took a different approach, aiming to create the best clean amp ever made by leveraging the unique capabilities of solid-state technology.
Finding the correct documentation is crucial for any repair or modification. Here are the primary ways to source the schematic: jc-120 schematic
The 1979 Roland JC-120/160 Service Manual is the standard for these early solid-state designs. It includes: Introduced in 1975, the JC-120 was a revolutionary