VLS Problem:

If the line is not perfectly straight at Bias 0 in the

 

test image (see Figure 4).

Corrective Action:

Try the following steps:

1 Perform the ￿artridge ￿lignment ￿alibration (￿etails ' Users Guide) using genuine HP media then print the Print7Quality Plot again to see if there has been any improvement.

2 If the problem continues perform the ￿ccuracy ￿alibration (￿etails ' page 572) and print the Print7Quality Plot again to see if there has been any improvement.

3 If the error is still present, replace the failing cartridge and print the Print7Quality Plot again.

4 If the error continues try the following: D Replace the Trailing ￿able ' page 878.

D Replace the ￿arriage ￿ssembly ' page 8737. D Replace the Electronics Module ' page 8713.

Only replace one component at a time and check if the problem has gone before replacing another component￿ Using this procedure you will be able to determine exactly which component failed￿

Test Pattern 4: Color Alignm￿n￿ Q￿ali￿y T￿s￿

Upper Test: The first of these patterns tests alignment between the cyan and magenta cartridges; it should be blue with no cyan or magenta shadows. The second tests alignment between the cyan and yellow cartridges; it should be green with no cyan or yellow shadows. The third tests alignment between the magenta and yellow cartridges; it should be red, with no magenta or yellow shadows.

Lower Test: This test pattern is to check the color alignment, and produces 6￿patterns each with 2 different primary colors. In each pattern you will see primary color circles. If there is misalignment between the primary colors the composite color will be present in one part of the circle and white will be visible at the opposite side of the circle.

There are two types of misalignment (see Figures 5 and 6):

DHorizontal 7 when the misalignment is in the horizontal axis.

DVertical 7 when the misalignment is in the vertical axis.

Print Quality

HP DesignJet 430, 450C and 455CA Printers

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