Be sure to add me to your favorites list Yamaha BB614F 4 String Fretless Bass Guitar Service Manual. This is a printed paper hardcopy copy of a Service manual for the Yamaha 4 string fretless bass, model BB614F. This is in excellent condition and includes: Cover sheet / TOC Overall assembly / exploded views of the chrome bridge, tuning machine assembly, and Jack Installation. Parts list / full list of parts, * marks the new parts for this model. Electrical Parts Circuit board Circuit diagram Wiring / F R pickups, volume, balancer tone dials. Specifications / full specs on this bass guitar. 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. Thanks for looking! Check out my Store!