HP Designjet T790 HP Designjet T790 and T1300 ePrinter - Image Quality Trouble
HP Designjet T790 Manual
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- HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 1
DESIGNJET T790 and T1300 ePrinter series Image-quality troubleshooting guide - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 2
are set forth in the express warranty statement accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. All images used in this document are reproduced - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 3
Lines are discontinuous ...8 Lines are blurred ...8 Line lengths are inaccurate ...9 The whole image is blurry or grainy 9 The paper is not flat ...10 The print is scuffed or scratched 10 Ink marks on the paper ...11 Black ink comes off when you touch the print 12 Edges of objects are stepped or - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 4
iv ENWW - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 5
time on them. Most-common issues resolution The Print Quality Troubleshooting Wizard can help with the kinds of problems most commonly experienced with the printer. The following specific problems are covered: ● Horizontal lines across the image (banding) ● The whole image is blurry or grainy - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 6
Print quality troubleshooting in the Support group. ● 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. Alternatively, or if you have other problems, you can continue reading this guide - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 7
colors ● Lines are discontinuous ● Lines are blurred ● Line lengths are inaccurate ● The whole image is blurry or grainy ● The paper is not flat ● The print is scuffed or scratched ● Ink marks on the paper ● Black ink comes off when you touch the print ● Edges of objects are stepped or not sharp - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 8
● If you still have a problem Print-quality issues 4 Chapter 2 Troubleshooting print-quality issues ENWW - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 9
printer. ● Check that your ink cartridges and printheads have not passed their expiration dates: see Using your printer. Horizontal lines across the image (banding) If your printed image suffers from added horizontal lines as shown (the color may vary): 1. Check that the paper type you have loaded - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 10
paper advance calibration: see Using your printer. If the problem persists despite all the above actions, contact your customer service representative for further support. Lines appear stepped or jagged If lines in your image appear stepped or jagged when printed: 6 Chapter 2 Troubleshooting - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 11
that you are using appropriate print-quality settings. See Using your printer. 3. Select the custom print-quality options in the driver dialog, and turn on the Maximum detail option (if available). Lines print double or in the wrong colors This problem can have various visible symptoms: ● Colored - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 12
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. 8 Chapter 2 Troubleshooting print-quality issues ENWW - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 13
the room at a steady temperature between 10 and 30°C (50 and 86°F). 4. Load the roll of film and let it rest for five minutes before printing. 5. If you are still not satisfied, try recalibrating the paper advance. See Using your printer. The whole image is blurry or grainy 1. Check that the - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 14
calibration status. If the status is DEFAULT, you should perform paper advance calibration: see Using your printer. If the problem persists despite all the above actions, contact your customer service representative for further support. The paper is not flat If the paper does not lie flat when it - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 15
can damage the printheads. Try the following suggestions to avoid this problem: 1. Check that the paper type you have loaded corresponds to the paper type selected in the front panel and in your software. 2. Use a recommended paper type (see Using your printer) and the correct print settings. 3. If - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 16
are likely to mark the back of the paper. Clean the platen with a soft cloth. Clean each rib separately without touching the foam between the ribs. Black ink comes off when you touch the print This problem may be caused by printing with matte black ink on glossy paper. The printer will not use matte - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 17
fibers, dust or loose coating material. To avoid this problem: 1. Try cleaning the paper manually with a brush before printing, to remove any loose fibers or particles. 2. Always keep the cover of your printer closed. 3. Protect your paper rolls and sheets by storing them in bags or boxes. Colors - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 18
The Image Diagnostics Print on page 16. 7. Try using the color adjustment options to produce the colors you want. See Using your printer. If the problem persists despite all the above actions, contact your customer service representative for further support. Color accuracy using EPS or PDF images in - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 19
the PostScript printer driver to print your job, if you have not already tried it. ● The Windows HP-GL/2 and HP RTL driver dialog includes an option called Max. application resolution, which enables you to print successfully in this situation. You will not normally need to change the default setting - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 20
output. Here are some suggestions to help you to avoid this problem. ● Try using the PostScript printer driver to print your job, if you have not already tried it. ● Select a smaller page size and scale to the desired final page size in the driver or in the front panel. ● Save the file in another - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 21
responsible needs cleaning. However, if the rectangles look solid, do not worry about just a few missing dashes in part 2; these are acceptable because the printer can compensate for a few clogged nozzles. Here is an example of a gray printhead in a good state: ENWW The Image Diagnostics Print 17 - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 22
but it may be worth trying even if the printer has not suggested it. See Using your printer. 5. If the problem still remains, replace any persistently faulty printheads (see Using your printer), or contact HP Support (see Using your printer). 18 Chapter 2 Troubleshooting print-quality issues ENWW - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 23
printer. ● Check the driver you are using to print with. If it is a non-HP driver, consult the driver vendor about the problem. You could also try using the correct HP driver, if feasible. The latest HP drivers can be downloaded from http://www.hp.com/go/T790/drivers/ or http://www.hp.com/go/ T1300 - HP Designjet T790 | HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 24
of different colors 13 white spots 13 T troubleshooting most-common issues 1 P platen cleaning 12 print quality troubleshooting wizard 1 print-quality problems banding 5 black ink comes off 12 blurred lines 8 bottom of print 12 clipped at bottom 14 clipped image 15 clipped or missing PDF objects 16
DESIGNJET T790 and T1300 ePrinter
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Image-quality troubleshooting guide