This service manual covers the Yamaha RX-V757, DSP-AX757, and DSP-AX757SE models, along with related models RX-V657 and HTR-5860. These audio-visual receivers are engineered to deliver a premium home theater experience, featuring 7.1-channel surround sound, powerful 100W per channel RMS output, and advanced processing capabilities like DTS-ES, Dolby Digital EX, and Dolby Pro Logic IIx. With extensive connectivity options including HDMI, digital optical and coaxial inputs, and component video, these units are designed for versatile integration into any entertainment system. Notable features include various Cinema DSP modes and Yamaha's YPAO room calibration for optimized acoustics, ensuring high-fidelity audio reproduction.

The purpose of this comprehensive service manual is to provide detailed technical information and guidance for the maintenance, repair, and servicing of the specified Yamaha audio-visual receivers. It includes essential information such as schematics, troubleshooting guides, and likely a parts list, all presented in English. This document is an indispensable resource for technicians and owners seeking to understand the internal workings, diagnose issues, and perform necessary upkeep to ensure the optimal performance and longevity of their equipment.