HP Latex 260 Maintenance and troubleshooting guide - Page 64

Misaligned colors, Color intensity varies

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Misaligned colors If the colors are misaligned in any direction, the printheads may be misaligned. This is likely if you have not aligned the printheads for a long time, or if there has been a substrate jam. Align the printheads if necessary (see Align the printheads on page 11). You can check whether it is necessary by using the printhead status plot (see Use the printhead status plot on page 53). Color intensity varies If some printhead nozzles are in use while others in the same printhead are not, water evaporates slowly from the ink in the unused nozzles, making the color more intense. Thus, in such cases you may notice variations in color intensity in areas where the color of the image should be constant. If you notice such a problem, there are various possible solutions. ● At the front panel, select the icon, then select Image quality maintenance > Enable color variation correction. This correction will then remain enabled until you disable it. ● If you notice the variation in intensity near one side of the print, try rotating the image by 180 degrees before printing. This may solve the problem in some cases, as all the nozzles are refreshed whenever they enter the service station between passes. ● Use your RIP to add lateral color bars on the side of the plot that is close to the ink supplies. The color bars are designed to exercise all the printhead nozzles, to prevent the problem from occurring. NOTE: Not all RIPs provide this option. ● Add lateral color bars to the image, manually, before printing. In this case, you can either use the standard colors, or decide to include a particular color in which you have noticed the problem. The recommended width of each color bar is 3 mm. 58 Chapter 6 Troubleshoot print-quality issues ENWW

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Misaligned colors
If the colors are misaligned in any direction, the printheads may be misaligned. This is likely if you have not
aligned the printheads for a long time, or if there has been a substrate jam. Align the printheads if necessary
(see
Align the printheads
on page
11
). You can check whether it is necessary by using the printhead status
plot (see
Use the printhead status plot
on page
53
).
Color intensity varies
If some printhead nozzles are in use while others in the same printhead are not, water evaporates slowly
from the ink in the unused nozzles, making the color more intense. Thus, in such cases you may notice
variations in color intensity in areas where the color of the image should be constant.
If you notice such a problem, there are various possible solutions.
●
At the front panel, select the
icon, then select
Image quality maintenance
>
Enable color variation
correction
. This correction will then remain enabled until you disable it.
●
If you notice the variation in intensity near one side of the print, try rotating the image by 180 degrees
before printing. This may solve the problem in some cases, as all the nozzles are refreshed whenever
they enter the service station between passes.
●
Use your RIP to add lateral color bars on the side of the plot that is close to the ink supplies. The color
bars are designed to exercise all the printhead nozzles, to prevent the problem from occurring.
NOTE:
Not all RIPs provide this option.
●
Add lateral color bars to the image, manually, before printing. In this case, you can either use the
standard colors, or decide to include a particular color in which you have noticed the problem. The
recommended width of each color bar is 3 mm.
58
Chapter 6
Troubleshoot print-quality issues
ENWW