This manual pertains to the McIntosh MR-77 tuner, a component noted for its engineering quality and reliability. While specific production years are not detailed, this document serves as an original service manual, offering comprehensive information for this particular unit. Its intended usage is for technical diagnostics and repair within a dealership environment.

The purpose of this manual is to provide detailed guidance for the maintenance and repair of the McIntosh MR-77 tuner. It covers essential areas including technical diagnostic procedures, disassembly and installation instructions, and electrical system information, supported by numerous illustrations, schematics, and wiring diagrams. Written by the manufacturer, this manual is designed to assist dealership technicians in ensuring the optimal performance and longevity of the component.