I have the same problem, I'm in 4.2.2
I've made a wipe data, I can't make a wipe cache (it says Error and reboot),
and when i plug the tab in odin mode, Odin doesn't detect the device even if I check the debug mode, so i can't install another ROM or another kernel
So, how can i install an 4.1.2 ?
The device was NEVER rooted, no other kernel, and now i regret it