This comprehensive service repair manual covers the Yamaha RX-V540, RX-V540RDS, HTR-5650, HTR-5650RDS, and DSP-AX540 receivers. It provides detailed technical information and instructions for servicing and repairing these models. The manual includes circuit diagrams, component layouts, troubleshooting guides, adjustment procedures, and part replacement instructions. It is also compatible with the Yamaha RX-V440, RX-V440RDS, HTR-5640, HTR-5640RDS, and DSP-AX440 receivers.