A method for arranging print head chips, includes: (a) setting a first
fiducial mark and a second fiducial mark on a PCB for determining
coordinate positions of a plurality of array units that are arranged on
the PCB and calculating a print range of the array units, wherein each
array unit has a plurality of spots that are transversely arranged from
the first one of the spots to the last one of the spots in sequence; (b)
setting a third fiducial mark as a start point for arranging the first
spot of a first array unit of the array units on the PCB; and (c)
arranging other array units on the PCB in sequence according to the
coordinate positions and the start point.