  We study the phase diagrams and thermodynamic properties of a system of
coexisting itinerant electrons and local pairs (LP), in the presence of
diagonal disorder. The model considered takes into account both the charge
exchange couplings, responsible for superconducting orderings, and the
density-density interactions, which can stabilize charge ordered states in the
system. Depending on the strength of the random on-site potential, the
interactions and the particle concentrations the model is found to exhibit
several various phases, including the homogeneous ones: superconducting (SC),
charge density wave (CDW) and nonordered (NO), as well as the phase separated
states (CDW-SC and CDW-NO).
