Classification using neural network after applying pca to my data.

I have a 192x1750 feature matrix, that is 192 features and 1750 samples. If i apply pca on this matrix, I get a 192x192 matrix. Now I am not sure how to classify this using neural network. I have 5 classes and my target vectors are of the form [1,0,0,0,0]. After doing pca, I am unsure on how to make my target matrix for correct classification using NN. My target vector before doing pca was 5x1750.