@ja_kub_sz I'm glad to know your dealer is working with you on this; it can be nerve-racking buying gear from a relatively unknown manufacturer (unknown in the West anyway). I know my dealer spoke to Cen Grand about this, as he's taken a gamble too when deciding to distribute for them in the UK. I met my distributor at an audio show here in the UK during the summer; he said he'd sent the unit back to them to look at, with a full breakdown of the problem.
But, as I say I couldn't be happier with the Cen Grand Super Clock, works flawlessly. Very happy with the distributor too; I'd email him, and he'd call me within the hour when I was having problems with the original Standard model. Of course, the heavily discounted/free upgrade to the Super Clock was very generous and most welcome too. Hats off for great dealers/distributors 🍻