HP DesignJet T790 and T1300 Printer Series - Using your printer
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Use a RIP to print the le.
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Reduce the resolution of bitmap images in your application software.
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Select a lower print quality in order to reduce the resolution of the printed image.
NOTE: If you are working under Mac OS, not all of these options are available.
These options are suggested for troubleshooting purposes and may adversely aect the nal output quality or
the time necessary to generate the print job. Therefore, they should be cancelled if they do not help to solve the
problem.
A PDF le is clipped or objects are missing
In older versions of Adobe Acrobat or Adobe Reader, large PDF les could be clipped or lose some objects when
printing with the HP-GL/2 and HP RTL driver at high resolution. In order to avoid such problems, upgrade your
Adobe Acrobat or Adobe Reader software to the latest version. From version 7 onwards, these problems should
be solved.
The Image Diagnostics Print
The Image Diagnostics Print consists of patterns designed to highlight printhead reliability problems. It helps you
to check the performance of the printheads that are currently installed in your printer, and whether any printhead
suers from clogging or other problems.
To print the Image Diagnostics Print:
1. Use the same paper type that you were using when you detected a problem.
2. Check that the selected paper type is the same as the paper type loaded into the printer. See View
information about the paper on page 40.
3.
At the printer's front panel, press , then , then select Image Quality Maintenance > Print
diagnostic image
.
It takes about two minutes to print the Image Diagnostics Print.
The print is divided into two parts, both of which test printhead performance.
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Part 1 (top) consists of rectangles of pure colors, one for each printhead. This part represents the print
quality that you will get from each color.
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Part 2 (bottom) consists of small dashes, one for each nozzle on each printhead. This part complements
the rst, and aims more specically to detect how many faulty nozzles each printhead has.
Please look carefully at the print. The names of the colors are shown above the rectangles and in the center of
the patterns of dashes.
152 Chapter 17 Troubleshooting print-quality issues ENWW