4K Upscaling (NU8000)

I have a question on the Samsung (NU8000) 4K Upscaling does anyone know how to disable the 4K Upscaling, in the service menu? With this TV when I turn to a 4k channel, my eyes can’t tell any difference, in my Samsung 7 series I could see a world of difference between the 4K channels and HD channels.

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