This service manual covers the Yamaha RX-V730, RX-V730RDS, RX-V630, RX-V630RDS, HTR-5560, HTR-5560RDS, DSP-AX630, and DSP-AX630SE models, representing Yamaha's early 2000s AV receiver generation. These units are engineered to deliver robust audio and video performance, supporting a wide array of surround sound formats including Dolby Digital, DTS, and various advanced processing modes. With comprehensive connectivity options for both digital and analog sources, and powerful amplification, these receivers were designed for immersive home entertainment experiences. The inclusion of features like an RDS-enabled tuner and advanced remote control capabilities underscores their sophisticated design.

The purpose of this English-language service manual is to provide detailed technical information for service personnel. It encompasses essential maintenance procedures, troubleshooting guides, detailed technical specifications, and critical safety guidelines necessary for the proper upkeep and repair of these AV receivers. By consulting this manual, technicians and service professionals can ensure the optimal performance and longevity of the Yamaha RX-V730 series and related models, addressing potential issues with accuracy and efficiency.