This service and repair manual covers the Yamaha RX-V730, RX-V730RDS, RX-V630, and RX-V630RDS AV receivers. These units are engineered to deliver high-quality audio performance, with the RX-V730 providing 100W per channel and the RX-V630 offering 95W per channel, both at 8 ohms. They feature advanced digital signal processing with multiple surround sound programs, including Dolby Digital, DTS, and Dolby Pro Logic II, for an immersive listening experience. The robust construction, with dimensions of 435 x 171 x 439 mm and weights of 14.0 kg for the RX-V730 and 13.5 kg for the RX-V630, underscores their build quality and reliability.

This comprehensive manual is designed for certified Yamaha technicians and individuals undertaking DIY repairs. It provides essential information for troubleshooting and maintaining these AV receivers, covering areas such as cleaning procedures for both exterior surfaces and ventilation systems, and detailed diagnostic steps for common issues like no sound, intermittent audio, display problems, and power failures. The manual also emphasizes preventative maintenance, particularly the importance of proper ventilation to prevent overheating. Its purpose is to equip users with the knowledge required to ensure the optimal performance and longevity of their Yamaha AV receivers.