HP Designjet 2000/3000cp HP DesignJet 2500/2000CP Printer - User's Guide - Page 236

Troubleshooting Solving Image-Quality Problems Test Pattern 3: IMPORTANT Problem See: Corrective Action 1 Black, cyan, magenta and - Refer to 11-20, Color Alignment yellow columns are correct Quality Test and verify this problem. but banding in any, or all of See the recommended actions. the secondary color columns. This is an indication that there is a horizontal misalignment. 2 Different colors visible in the spaces between some or all of the columns (depending on the color of the printhead that is misaligned) This is an indication of vertical misalignment. Example C Refer to 11-20, Color Alignment Quality Test and verify this problem. See the recommended actions. NOTE:It is also possible that the banding was caused because you were using nonHP media. The performance of your printer can only be guaranteed if you use genuine HP media. Nozzle Print Test Use this test purely to confirm an error highlighted in Test Pattern 2:. Some of the printhead nozzle problems that you will see in this pattern do not mean you will not get perfect image quality results. The printer has internal corrections that will hide many nozzle defects. In this test all the 240 nozzles of each printhead are tested. For each of the four colors you will see the numbers 10 to 240 over the diagonally stepped lines in increments of 10. These numbers correspond to the nozzle number that prints each step. There are two printhead nozzle errors: n Nozzles not printing n Nozzles misdirected. 11-16