Epson Stylus TX 121 alignment Problem

[railey505]

Hi to all, I have an epson tx121 all in one printer. Notice that the color YELLOW Text print out are vertically not align but the other basic color (Cyan, Magenta and Black) are Align. Tried going to Epson Maintenance and did the Print Head alignment (Vertical, Black and Color horizontal printing). Made realignment on the vertical Print Sheet (Twice), but still when I try to print some text, the Yellow color still are not align. Need your advice Guys. Thanks