HP 450c Service Manual - Page 81

Analyzing the PrintĆQuality Plot The PrintĆQuality Plot will contain six patterns as follows: 1 Cartridge Warm Up (See below). 2 Nozzle Print Test (See below). 3 Vertical Line Straightness Test ' page 6Ć7. 4 Color Alignment Quality Test ' page 6Ć9. 5 Color Variation Test ' page 6Ć11. 6 Banding Test ' page 6Ć12. Test Pattern 1: Cartridge WarmĆup This pattern warmsĆup the cartridges, leaving them in a perfect operating condition. You can ignore this pattern and continue with Test Pattern 2. Test Pattern 2: Nozzle Print Test In this test all the 96 nozzles of each cartridge are tested. For each of the 4 colors you will see the numbers 1 to 90 over the diagonally stepped lines in increments of 5. These numbers correspond to the nozzle number that prints each step. There are two cartridge nozzle errors (see Figure 1): D Nozzles not printing. D Nozzles misdirected. Figure 1 Print Quality HP DesignJet 430, 450C and 455CA Printers 6-5