Semi-automatic printhead alignment
Tools required
This topic explains the concepts involved in this subject.
● HP OfficeJet Pro 7740 multi-function printer or HP OfficeJet 7612 scanner (for Japan and Asia/
Pacific regions)
● HP OfficeJet Pro 9010 / 9015 and 9020 scanners.
● Single sheet of Tabloid or A3 paper
● Triphase to monophase power adaptor (if needed)
NOTE: HP recommends setting up the multi-function printer or scanner by following the instructions
on the scanner fr
ont panel after it is first turned on. This step can be skipped for the semi-automatic
printhead alignment.
The validation plot
To check that the semi-automatic alignment has been performed correctly, you can print a diagnostic
plo
t. The following pattern is printed for each of the 15 dyes except the last. The pattern is designed
with each line being composed of two little segments. Those segments have an induced incremental
alignment error and are centered on the diamond (♦) and triangle (▲) positions.
The printhead is well aligned when all segments indicated by a diamond (♦) or a triangle (▲) are seen as
a single continuous line. If the line is broken into two pieces, repeat the process of printhead alignment.
NOTE: Not all the lines indicated by the diamond and triangle need to be perfectly aligned. A tolerance
o
f ±1 is accepted and is not a defect.
Figure 12-1 Well aligned examples
330 Chapter 12 Troubleshooting
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