This comprehensive service manual provides detailed technical information for the Yamaha R-V1103 and RX-V793 audio receivers. It includes a wealth of information to assist technicians in troubleshooting, repairing, and maintaining these receivers. The manual covers various aspects of the receivers, including circuit diagrams, component specifications, adjustment procedures, and troubleshooting tips. It also contains detailed information on each component and its functionality, facilitating a deeper understanding of the receivers' internal workings. This manual is an essential tool for qualified technicians and service professionals involved in the repair and maintenance of Yamaha R-V1103 and RX-V793 audio receivers.