This comprehensive service manual provides detailed technical information and repair procedures for a range of Yamaha audio/video receivers, specifically the RX-V459, HTR-5940, DSP-AX459, and HTR-5935 models. The manual covers a wide range of topics, including troubleshooting, component identification, circuit diagrams, adjustment procedures, and replacement instructions. It serves as an essential resource for technicians and repair professionals seeking to diagnose and repair these receivers effectively. The manual's depth and clarity make it an invaluable tool for understanding the intricacies of these Yamaha models and ensuring successful repairs.