JC-55 JC-77. OPERATION MANUAL. • Please read the operation manual carefully for proper operation. FEATURES. • The Roland Jazz Chorus JC includes. Roland JC-55 Jazz Chorus (Ed.1) Service Manual.pdf 9365 Audio Schematics and Service Manuals files magnet Collections. Thumbnails Document OutlineView and Download Roland Jazz Chorus JC-55 operation manual online. Jazz Chorus JC-55 musical instrument amplifier pdf manual download. This page contains information about the Owner's Manual for the JC-55 from Roland Corporation. A locally cached version of "Owner's Manual" is available at: