THERE ARE NO oxidation. Television is new two months. If when power on tv press power on first from nad u3020 then the remote control of Sony do not work.as to block the FREQUENCIES.The same happens if you press first power on from sony Tv then should take out the batteries from Nad remote control.

Remote codes from Nad D3020.

Model D3020 Function Format Address Data Comment Hex Hex Dec Dec Address Data

Aux 1 NEC 877C 9B 34684 155

Aux 2 NEC 877C C0 34684 192

Bluetooth NEC 877C C2 34684 194

Coax 1 NEC 877C 85 34684 133

Computer NEC 877C 91 34684 145

Mute NEC 877C 94 34684 148

Optical 1 NEC 877C 89 34684 137

Optical 2 NEC 877C 8D 34684 141

Power Off NEC 877C C8 34684 200

Power On NEC 877C 25 34684 37

Source Down NEC 877C 1D 34684 29

Source Up NEC 877C 1A 34684 26

Volume Down NEC 877C 8C 34684 140

Volume Up NEC 877C 88 34684 136

November-18-13 IR Commands by Model Page 31 of 135