This manual provides essential circuit diagram and servicing information for the 230R Car Radio, a model known for its band-spread tuning capabilities, and the Model 30X Short Wave Converter. These units represent a crucial part of classic vehicle audio systems. The 230R series likely dates from the 1950s or 1960s, a period of significant advancement in car radio technology, while the 30X accessory extended reception to shortwave frequencies. This documentation is invaluable for owners and technicians involved in the restoration and maintenance of these vintage automotive electronic components. The scope of this four-page English-language manual encompasses detailed circuit diagrams for both the 230R and the 30X Short Wave Converter, serving as the primary tool for troubleshooting and repair. It covers radio circuitry, converter circuitry, and general servicing information, providing component-level detail and insights into tuning circuits, audio output stages, and power supply elements. This technical information is intended for electronics technicians and experienced radio repair personnel, enabling them to diagnose and rectify common issues such as component degradation, intermittent connections, and tuning inaccuracies. The manual facilitates proper maintenance and repair, ensuring the optimal performance and longevity of these classic units.