This answer is somewhat poor as may be my question. Nevertheless it seems very obvious, at least to me, that I want to upgrade the firmware. This answer is in terms of apply power and push the power-on button and not worth this money.
The deal: the disk you refer to, will not be released, the dvd-player inside is a DVR-107-XA for which, even from the Japanese site, no real firmware is provided. Don't be fooled, firmware upgrade DVRA07XLA_FW122.EXE does noy work. Latest level should be 1.22 I've got 1.16. At least show some determination and pop up a firmware site holding either the iso-image or the firmware or send it to me directly.