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We present a model of neutrino masses within the framework of the EW-$\nu_R$model in which the experimentally desired form of the PMNS matrix is obtainedby applying an $A_4$ symmetry to the \emph{Higgs singlet sector} responsiblefor the neutrino Dirac mass matrix. This mechanism naturally avoids potentialconflict with the LHC data which severely constrains the Higgs sector, inparticular the Higgs doublets. Moreover, by making a simple $ans\ddot{a}tz$ weextract $\mathcal{M}_l {\mathcal{M}_l}^\dagger$ for the charged lepton sector.A similar $ans\ddot{a}tz$ is proposed for the quark sector. The sources ofmasses for the neutrinos are entirely different from those for the chargedleptons and for the quarks and this might explain why $U_{PMNS}$ is {\em verydifferent} from $V_{CKM}$.

On neutrino and charged lepton masses and mixings: A view from the electroweak-scale right-handed neutrino model