This comprehensive service manual provides detailed instructions and technical information for repairing and servicing Yamaha Pacifica 312, 312ii, 312mii, and 312-mii guitars. The manual includes specifications, a parts list, exploded views, circuit board diagrams, and step-by-step disassembly procedures. You'll find detailed information on LSI pin descriptions, IC block diagrams, circuit board layouts, inspection procedures, and a MIDI implementation chart. This manual also includes a comprehensive overall circuit diagram. With its detailed illustrations and clear instructions, this manual is an essential tool for anyone looking to repair or maintain their Yamaha Pacifica guitar.

The Yamaha Pacifica 312 series is a popular line of electric guitars renowned for their versatility and affordability. The Pacifica 312, 312II, 312MII, and 312-MII models represent different iterations of this popular design, each offering a unique set of features and refinements. These guitars are designed to cater to a wide range of playing styles, from rock and blues to jazz and country. The Pacifica 312 series features a solid alder body, a sleek contoured design, and a bolt-on maple neck with a rosewood fingerboard. The guitars are equipped with a humbucker pickup in the bridge position and two single-coil pickups in the middle and neck positions, offering a variety of tonal options. The Pacifica 312 models also feature a 5-way pickup selector switch, a master volume knob, and tone knobs for each pickup. The guitars come with a vibrato bridge with a locking nut, allowing for expressive playing and pitch bending. The Yamaha Pacifica 312 series has undergone several notable updates throughout its evolution. The Pacifica 312II features upgraded pickups and a slimmer neck profile compared to the original 312. The Pacifica 312MII boasts a modern, sleek look with a black finish and black hardware. The Pacifica 312-MII, the latest iteration, incorporates advanced features such as a coil-tap switch for a greater variety of sounds and a locking tremolo bridge for enhanced stability and tuning accuracy. The Pacifica 312 series has garnered praise for its exceptional playability, comfortable feel, and versatility. These guitars are ideal for both beginner and experienced players seeking a reliable and affordable instrument capable of producing a wide range of tones. The Pacifica 312 series continues to be a popular choice for guitarists around the world, acknowledged for their exceptional value and ability to meet the demands of diverse musical styles.