HP Designjet T620 Printer series - Manual (Page 133)

Edges of objects are stepped or not sharp
If edges of objects or lines appear to be poorly defined or lighter in density, and you have already set
the print-quality slider to Quality in the driver dialog (Mac OS Print dialog), select the custom print-quality
options, and try setting the quality level to Normal. See
Printing on page 45 .
Edges of objects are darker than expected
If edges of objects seem darker than expected, and you have already set the print-quality slider to
Quality in the driver dialog (Mac OS Print dialog), select the custom print-quality options, and try setting
the quality level to Normal. See
Printing on page 45 .
Horizontal lines at the end of a cut sheet print
This type of defect affects only the end of a print, within approximately 30 mm of the trailing edge of the
paper. You may see some very thin horizontal lines across the print.
To avoid this problem:
1. Print the Image Diagnostics Print. See The Image Diagnostics Print on page 133 .
2. Consider printing with roll paper.
3. Consider using larger margins around your image.
Vertical lines of different colors
If your print has vertical bands of different colors along it:
1. Try using thicker paper, choosing from the recommended paper types such as HP Heavyweight
Coated Paper and HP Super Heavyweight Paper. See
Order paper on page 106 .
2. Try using higher print-quality settings (see Printing on page 45 ). For instance, if you have set the
Print Quality slider to Speed, try setting it to Quality.
130 Chapter 13 Troubleshooting print-quality issues ENWW
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