Greetings from RojoLand!
Not sure what you mean by synchro (not "sincro") recording. Are you referring to what's known as "sel-sync" or "simul-sync" on some reel-to-reel machines, where you listen to a track already recorded while recording another track along with it (and that's done by playing the already-recorded track on the deck's *record* head while also recording the other track). I'm not aware of any cassette decks set up for that (I could be wrong!).
The "sincro [sic] recording output" thing, I don't understand at all. The CD player just outputs (unless you are talking about a CD *recorder*, and I know of no such machine that could, or needs to, do simul-sync), so the notion of a CD player having a synchro output makes no sense.
If you have some literature that describes what you are asking about, I'd love to see it. What model of Technics (not "Tehnics") recorder? I might want to chase down its manuals.
Take care,
—
J. E. Knox "The Victor Freak"