Be sure to add me to your favorites list Original Roland SCB-40 SCB-60 SCB-100 Bass Guitar Amp Service Manual / Schematics Booklet from 1984. This is an original Roland service manual for the vintage Roland SCB-40, SCB-60, and SCB-100 bass guitar amplifiers. I have 2 of these available, both in good condition with some marks, but nothing that affects the info on the pages. This service manuals has specs, layout, parts lists, circuit boards, and circuit diagrams / schematics and more. It's from 1984 and was printed in Japan. This is a manual or document, this is NOT a piece of equipment or instrument. If you have any questions, I'm always happy to answer them. Thank you so much for looking! Thanks for looking! Check out my Store!