This comprehensive service manual provides in-depth technical information for the Yamaha RX-V661, HTR-6060, and DSP-AX761 receivers. It offers detailed instructions and diagrams for troubleshooting, repair, and maintenance. The manual covers various aspects of the receivers, including circuit diagrams, component specifications, alignment procedures, and troubleshooting guides. It is an essential resource for technicians, repair shops, and anyone involved in the servicing of these Yamaha receivers.