Awww, lazy manufacturer support.
The email address I contacted sent me a reply that says THEY only deal with stuff
sold in the U.S.
They gave me a new email address for worldwide support, if you want to try it:
www.panasonic.net
I checked the owners manual for your model, and it is ONLY for 120VAC 60Hz.
I lived in Japan for 2 1/2 years. They supplied 120VAC 50Hz. My tape decks, turntables and TV all were affected. The moving parts ran slower, and the TV had
horizonal lines running through the picture. (My stuff set for 120VAC 60Hz)
BUT, at that time, all the gear had user switchable voltage and cycle (Hertz) switchable inputs. Who knows with engineering these days (that was 1970's). I suppose a receiver might work at 50hz, if they built-in circuitry safeguards these days. But I'd contact the world-wide support email, and ask them, just to be sure.
Hope you get it running (with expected life-expectancy) with few problems.
By the way, all the Japanese audio gear I bought in Japan in the 1970's is still running flawlessly in my home today. Akai, Pioneer. I did buy U.S. speaker though, Acoustic Research (Teledyne), who may be out of business now, but speakers still
sound great.