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We explore in this paper certain phenomenological consequences - to be testedat the LHC - regarding the scalar sector of a SU(3)xSU(3)xU(1) gauge model withright-handed neutrinos. Our analysis is performed in a particular theoreticalapproach of treating gauge models with spontaneous symmetry breaking in which asingle free parameter 'a' finally remains to be tuned, once all the StandardModel phenomenology is recovered. It is also proved that this particular methodis flexible enough as to accommodate the traditional approach in which threeVEVs supply masses for gauge bosons and fermions, while three accompanyingneutral scalars survive the SSB and take part in various interactions. Two ofthem exhibit a hierarchy m(H3) = 2m(H2) with masses below the SM scale 246 GeV(independently of the parameter 'a') and the third one coming out very heavy(depending on 'a'), at a mass comparable to the overall breaking scale <phi>. Aplausible scenario implying <phi> in 1 - 10 TeV is then exploited.

The Higgs sector of a 3-3-1 model with right-handed neutrinos to be tested at the LHC