The bulk electronic structures of two high-order quaternary approximants F-type icosahedral (i)-Al-Pd-TM quasicrystal: Al-Pd-Cr-Fe and Al-Pd-Mo-Fe, having similar electron to atom (e/a) ratio as i-Al-Pd-Mn quasicrystal, have been investigated by hard x-ray photoelectron spectroscopy. We establish the presence a well-formed pseudogap at Fermi level in both approximants. turns out be deeper compa...