Datasheets, service manuals, circuits, electronics, components, CAD
https://www.radioradar.net/en/service_manuals/audiotechnics_circuits/pioneer_ken-p5.html
Pioneer KEH-P515 X1M/UC, KEH-P5600 X1M/UC, KEH-P5650 X1M/ES
Block diagram, schematic diagrams of autoradio tape recorders Pioneer