I love cassette decks and thus I started to repair/fix old walkmans too. Specifically thin Panasonic stuff, which I reallllly preffer!
Welcome Alen, I don't think I have any Panasonic Cassette Decks, I've got a few Technics, post your equipment if you get a chance.
My decks are Sony (Walkmans Panasonic) Specifically Sony TC-K950ES. I fully repaired and calibrated it (oscilloscope, proper calibration tape, mirror tape....). A lot of work, but it was a joy. And now I can not believe how good good old cassettes sound on such deck!
The Sony looks like a nice deck, I've got a couple of it's little brothers out in the shop that I've used over the years. I thought you might have some Panasonic Component Tape Decks, we didn't get many over here, mostly all-in-ones. I've got some old test equipment I use for calibration on the rare occasion I get to mess around with my stuff, I'm self-taught since there's not a ton of information out there about the equipment. I've found some old magazine articles with the equipment and back in the 70's it was several thousand dollars. One unit is tagged from Ampex and the other from a well known US Audio Dealer, they've even have calibration stickers.