The book examines popular models of music centers of famous world manufacturers of audio equipment SAMSUNG (MAX-440), PHILIPS (EW17), AIWA (CUD DN858), SONY (HCD-D60GR7GR7JRX70). Their structural and circuit diagrams are given, the main operating modes and design are described in detail. Recommendations on adjustment of basic electrical parameters, on detection and elimination of typical faults are given.