This comprehensive service manual for the Yamaha RX-V492 and R-V702 AV receivers provides detailed technical information and troubleshooting guidance for repair technicians. It covers a wide range of topics, including circuit diagrams, component specifications, adjustment procedures, and repair techniques. The manual is designed to assist qualified personnel in diagnosing and resolving issues related to the receiver's audio, video, and network functionalities. It includes detailed illustrations and explanations, making it a valuable resource for understanding the internal workings of these Yamaha AV receivers.