This document provides schematics for the Audio Innovations Series 500, a product from 1989. While specific details on its intended usage or unique selling points are not elaborated, the focus on component schematics suggests an emphasis on understanding its internal workings, particularly its vacuum tube power amplifier and power supply sections. The inclusion of phono section schematics from related years indicates a comprehensive look at the audio signal path.

This manual serves as a technical reference for the Audio Innovations Series 500. It contains detailed schematics for the Phono Section, Switching, Power Amp, and Power Supply. The primary purpose is to aid in the understanding and potential repair of the unit by providing visual representations of its electrical components and their interconnections. While scheduled maintenance intervals and common fault diagnoses are not explicitly covered, the detailed schematics are essential for technicians and enthusiasts seeking to maintain or troubleshoot this audio equipment.