Reference material is provided for troubleshooting and repair of audio frequency amplifiers, as well as radio receivers of the most common models. The method of selection and replacement of radio components of domestic and foreign production during REA repair is considered. The inclusion of microcircuits of foreign amplifiers, as well as cascades of radio receivers on transistors and microcircuits, their circuit solutions are given. For a wide range of radio amateurs and craftsmen involved in the repair of radio equipment.