That's what it is
I didn't understand your use of the abbreviation KR at first.
Anyway I bought
the same thing and it finally came. I've spent maybe the last two hours on it.
If you're getting a blank screen, the first thing I'd recommend would be trying other carts. I have one Japanese cart that shows nothing at all, and one that always pops up (Sailor Moon S). I also took the top cover off and my english reproduction of Shin Nekketsu kunio-kun works.
I found that you won't get picture if you turn on the comboy after power is already being applied to the jamma edge. You have to switch on the comboy then switch on the cabinet. You can get picture if you switch it off, back on, and then hit the restart button though.
The device shows great picture on my sony trinitron with ATP-300 supergun even though games restart every few minutes.
The picture does not synch on my Sega blast city. When the cabinet turns on, it makes a beeping sound and when the coin mech is triggered it makes a screech like space invaders. I tried 15,24, and 31 khz and none sychned up. There was picture but it was out of synch. I also tried with the nanao's remote unplugged.
As someone who's not technical, my guess is that the picture shows up on the trinitron pvm because it hasn't really been converted. So it works on the regular tv when my supergun outputs through S video.
My second guess it that maybe the device needs -5 volts or one of the other pins that is on the ATP-300 but not on the Sega Blast City Harness.
I'm going to test on my Astro City, Impress, and Aero Table when they get here.