Datasheets, service manuals, circuits, electronics, components, CAD
https://www.radioradar.net/en/service_manuals/videotechnics_circuits/sony_slv_l49_l.html
Sony SLV-L49, L52, L59, L69HF, L72HF, L79HF, L89HF, X55, X66HF
Schematic diagram, oscillograms at the control points of the videorecorder Sony SLV-L49, L52, L59, L69HF, L72HF, L79HF, L89HF, X55, X66HF