This service manual pertains to the McIntosh MR-85 tuner, a high-fidelity audio component renowned for its engineering quality and reliability. McIntosh has a long-standing heritage in audio, and the MR-85 embodies this commitment to exceptional sound reproduction. This manual is designed to provide comprehensive information for maintaining and understanding this sophisticated piece of audio equipment.

The purpose of this manual is to serve as a definitive resource for dealership technicians and owners alike. It covers essential areas including detailed technical diagnostic procedures, disassembly and installation instructions, and comprehensive chassis and electrical system information, complete with included wiring diagrams. This document is the most complete available and aims to empower users with the knowledge necessary for optimal performance and longevity of their McIntosh MR-85 tuner.