HP 72SR manual Repeat steps 6 through 8 for each of the twelve heads

Use a printer’s loupe to select the pattern, since the lines in the patterns may be difficult to see.

+6 +4 +2 0 -2

Fig. 4-2. BiDi Registration pattern.

7.Press the , or ) control panel keys repeatedly until the num- ber next to the pattern that is closest to aligned perfectly is displayed.

For example, if pattern +2.0 is the closest aligned, press the , key to change the display to:

HEAD-1 +2.0

If a printhead is extremely out of alignment, there may be no pattern in alignment. Since the black vertical bars are nominally five pixels apart, you can add +5 or -5 to a pattern number to shift the colored bars right or left by one black bar. Alternatively, you can perform the BiDi Registration repeatedly, which will move the head in smaller increments, until the head is aligned.

8.Press ! (Proceed).

The control panel message increments the head number by one.

9.Repeat steps 6 through 8 for each of the twelve heads.

When you have entered registration values for all heads, the control panel displays this message:

Registration Successful

4-14 Manual Calibrations