This comprehensive service manual provides detailed technical information for the Marantz SR5200 and SR6200 AV surround receivers. It is designed to empower technicians and individuals with the knowledge to diagnose and repair these sophisticated audio/video components. The manual includes detailed schematics, wiring diagrams, troubleshooting guides, and component specifications, covering a wide range of technical aspects, from power supply and amplifier circuits to digital audio processing and video signal management. This resource will be invaluable for anyone seeking to understand the inner workings of these receivers and perform repairs efficiently and effectively.