HP Designjet T790 HP Designjet T790 and T1300 ePrinter - Image Quality Trouble - Page 14

4. Go to the front panel and press then to see the printhead alignment status. If the status is PENDING, you should align the printheads. See Using your printer. After alignment, you may wish to reprint your job in case the problem has been solved. 5. Go to the front panel and press then to see the paper advance 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 comes out of the printer, but has shallow waves in it, you are likely to see defects in the printed image, such as vertical stripes. This can happen when you use thin paper that becomes saturated with ink. Print-quality issues 1. Check that the paper type you have loaded corresponds to the paper type selected in the front panel and in your software. 2. Try changing to a thicker paper type, such as HP Heavyweight Coated Paper or HP Super Heavyweight Plus Matte Paper. 3. 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. The print is scuffed or scratched The black ink pigment can be scuffed or scratched when touched by a finger, a pen or some other object. This is particularly noticeable on coated paper. Glossy paper may be extremely sensitive to the basket or to anything else that it contacts soon after printing, depending on the amount of ink used and the environmental conditions at the time of printing. 10 Chapter 2 Troubleshooting print-quality issues ENWW