Datasheets, service manuals, circuits, electronics, components, CAD
https://www.radioradar.net/en/service_manuals/audiotechnics_circuits/pioneer_keh_p515x1m_uc.html
Pioneer KEH-P515 / P5600 / 5650
The schematic cicuit diagrams of the autoradio tape recorder Pioneer KEH-P515 X1M/UC, KEH-P5600 X1M/UC, KEH-P5650 X1M/ES