HP 450c HP DesignJet 430, 450C, and 455CA Printer - User's Guide - Page 154

Troubleshooting Solving print quality problems If there are jagged vertical or horizontal lines If problem is only with vertical black or gray lines, run the Black Cartridge Alignment Procedure, explained on page 5-4. 450C/455CA If problem is with any other color or orientation, run the Color Cartridge Test procedure, explained on page 5-8. If there are slightly warped lines The media itself may be warped. This can happen if it has been used or stored in an extreme environment. For all environmental specifications, see page 10-5. 450C/455CA If there are color "shadows" In the example on the left, a magenta "shadow", which is not part of the drawing, appears at the edge of a blue object. The cartridges need to be re-aligned. Run the Color Cartridge Test procedure, explained on page 5-8. If a cartridge is not printing at all Look to see if the cartridge is out of ink. See page 7-2. Try priming the cartridge to clear the nozzles. See page 7-7. If it is still not printing, remove the faulty cartridge and check the print nozzles to make sure the protective tape has been removed. If the print quality appears to be poor just in one part of the print Did you raise the cover during printing? Although the print continues after the interruption, the print quality in the area of the interruption cannot be guaranteed. 9-14