HP Designjet 510 Printer series - Manual (Page 79)

Color alignment
When you look at the image you have printed:
See the Troubleshooting procedure for instructions on how to solve this problem.
The colored lines are printed
double and they are the wrong
colors
Vertical lines are misaligned or
fuzzy (not smooth)
The borders of colored blocks
are overlapped and the
overlapping areas have
different colors in them.