Be sure to add me to your favorites list Yamaha TRB-4 II Electric Bass Guitar Service Manual and Parts List Booklet. This is a printed paper hardcopy reproduction of the Service manual for the Yamaha 4 string bass, model TRB-4 II. This one is in excellent condition and includes: Cover sheet / TOC Overall assembly / exploded view of the bridge and jack installation Parts list / full list of parts, * marks the new parts for this model Circuit board and circuit diagram / Wiring for F R pickups / Tone Volume 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!