HP DesignJet T790 and T1300 Printer Series - Using your printer

General advice
When you have any print-quality problem:
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To achieve the best performance from your printer, use only genuine manufacturer's supplies and
accessories, whose reliability and performance have been thoroughly tested to give trouble-free
performance and best-quality prints. For details of recommended papers, see Order paper on page 120.
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Make sure that the paper type selected in the front panel is the same as the paper type loaded into the
printer (see View information about the paper on page 40). At the same time, check that the paper type has
been calibrated. Also make sure that the paper type selected in your software is the same as the paper
type loaded into the printer.
CAUTION: If you have the wrong paper type selected, you could experience poor print quality and
incorrect colors, and perhaps even damage to the printheads.
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Check that you are using the most appropriate print-quality settings for your purposes (see Printing
on page 46). You are likely to see lower print quality if you have moved the print-quality slider to the 'Speed'
end of the scale, or set the custom quality level to Fast.
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Check that your environmental conditions (temperature, humidity) are in the recommended range. See
Environmental specications on page 177.
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Check that your ink cartridges and printheads have not passed their expiration dates: see Maintain the ink
cartridges on page 116.
Print quality troubleshooting wizard
The Print Quality Troubleshooting Wizard can help with the following problems:
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Horizontal lines across the image (banding)
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The whole image is blurry or grainy
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Lines are too thick, too thin or missing
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Colors are inaccurate
To start the wizard:
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From the HP Utility for Windows: go to the Support tab, and select Print quality troubleshooting.
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From the HP Utility for Mac OS: select Print quality troubleshooting in the Support group.
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From the Mac OS Print dialog: go to the Services panel, select Device Maintenance, then select Print quality
troubleshooting from the list of maintenance tasks.
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From the Embedded Web Server: go to the Support tab, select Troubleshooting, then select Print quality
troubleshooting.
ENWW General advice 141