Driver Versions: - PCL6 1.04.14.01 - PS 1.04.14.01 - PPD file version 1.0 (MXM753N, MXM753U, MXM623N, MXM623U, MXM283N, MXM363N, MXM453N, MXM503N, MXM363U, MXM453U, MXM503U) - PPD file version 1.3 (MXB401, MXB400P, MXB402, MXB402SC)