HP Designjet T620 Printer series - Manual (Page 129)

1. Check that you are using appropriate print-quality settings. See Printing on page 45 .
2. Reseat the printheads by removing them and then reinserting them. See Remove a printhead
on page 88 and Insert a printhead on page 91 .
3. Align the printheads. See Align the printheads on page 142 .
Lines are blurred
Humidity can cause ink to soak into the paper, making the lines blurred and fuzzy. Try the following:
1. Check that your environmental conditions (temperature, humidity) are suitable for high-quality
printing. See
Environmental specifications on page 159 .
2. Check that the paper type selected in the front panel is the same as the paper type you are using.
To check on the front panel, use the
View loaded paper key .
3. Try changing to a heavier paper type, such as HP Heavyweight Coated Paper or HP Super
Heavyweight Plus Matte Paper.
4. Select a paper type that is slightly thinner than the paper you have loaded; this will persuade the
printer to use less ink. Here are some example paper types in ascending order of thickness: Plain
Paper, Coated Paper, Heavyweight Coated Paper, Super Heavyweight Plus Matte Paper.
5. If you are using glossy paper, try changing to a different type of glossy paper.
6. Align the printheads. See Align the printheads on page 142 .
126 Chapter 13 Troubleshooting print-quality issues ENWW
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