yes, the q50 with nc50 and serial adapter can do 1 way serial output to a device.  the only 2 way communication available is with the pre-configured devices.

what is the model of the samsung tv?  i havent controlled a samsung with rs232 yet, but sometimes you can get lucky and find the codes in the manual for certain brands.

otherwise ask here and someone can probably email you the codes.  you could also call samsung and ask them to give you the codes.