This comprehensive service manual provides detailed technical information and repair instructions for the Yamaha RX-V757, DSP-AX757, and DSP-AX757SE home theater receivers. It covers a wide range of topics, including schematic diagrams, component identification, troubleshooting procedures, and repair techniques. The manual also includes information on the RX-V657 and HTR-5860 models, making it a valuable resource for technicians and DIY enthusiasts seeking to maintain and repair these Yamaha receivers. The manual is written in English and offers clear explanations and illustrations to facilitate understanding and successful repairs.