It’s possible this schematic is the one for your stereo. It’s hard to read the tubes in the diagram you posted but I think they match .
https://www.radiomuseum.org/r/electrohom_catalina_am.html
Be careful about powering up a vintage device, you might cause serious damage by doing so. The most common failures are in the capacitors. My advice is to do some searching here in our resources and online about restoring vintage radios before you dive in.
