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Print Quality
6-11
HP DesignJet 430, 450C and 455CA Printers
3 If the problem continues perform the Accuracy
Calibration (Details ' page 5Ć2) and print the
PrintĆQuality Plot again to see if there has been
any improvement.
4 If the error continues try the following:
D Replace the Trailing Cable ' page 8Ć8.
D Replace the Carriage Assembly ' page 8Ć37.
D Replace the XĆaxis Assembly ' page 8Ć23.
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 5: Color Variation Test
This test produces four boxes; black, blue, cyan and yellow. In each box there
are two horizontal bands, the lower band is 100% shade, the upper band is
shaded from 100% scaling to 60%.
The purpose of this test is to determine at what percent the upper shading
becomes visible from the lower band. The best way to do this is to cover the
box with a piece of paper and slide the paper horizontally across the box. Stop
as soon as you see a different shade in the upper box. You can then determine
the percentage scaling from the figure at the top or bottom of the box.
Figure 7 (Correct)
Figure 8 (Incorrect)