HP 1050c Service Manual - Page 155

Print Quality NOTE How to fix the Nozzle Defects If your printer has nozzle defects, it does not mean that you will not get perfect print quality results. The printer has automatic procedures to hide many nozzle defects. This type of problem affects mostly Normal and Draft modes. 1 Go to the Printer submenu and press Enter. Utilities Recover Printheads All, cyan,magenta yellow, black Ready Ink CYAN MAGENTA YELLOW BLACK Printer submenu 2 Go to the Utilities/Recover Printheads. 3 Select the printhead color that is responsible for the problem. The printer will try to 'Recover' the defective printhead. If you are not sure which printhead color is giving you the problem select all of the printheads. Please wait as the process of recovery takes a few minutes. 4 Reprint the Print Quality Test to check that the defective nozzles have been corrected. 5 If the error is still present, replace the worst printheads. Color Alignment Print Test This part of the Print Quality Test is designed to check the color alignment. It produces twelve patterns each with two different primary colors. In each pattern you will see a cross surrounded by another color. If there is misalignment between the colors there will be inconsistent spacing between the cross and the other color. There are two types of misalignment: n Horizontal - when the misalignment is in the horizontal axis. n Vertical - when the misalignment is in the vertical axis. HP DesignJets 1050C and 1055CM Printers Service Manual 6-7