How much have you used the machine so far? [USER=384]@Digerati[/USER] has given you good advice as far as checking things, particularly how hot the power brick on the charger gets.
But remember, when these machines are brand spankin' new there can be some "burn off" from the heat sink and pipe as these heat up for the first time. And the longer they're heating up the further down the pipe will get warm and have some "burn off" (usually of oils from pressing).
But if you're smelling a "burning plastic" smell, that would be concerning in a new machine. I know nothing specific about the machine you have, but over the decades there have been occasional ones that were just very poorly designed in terms of how they packed in the "hot stuff" in relation to stuff that should not really get hot.
