Lexmark C91 Series, Service Manual

Page: 159 / 493

Diagnostic aids
3-9
5055-xxx
When the Y value is correctly adjusted, the magenta radar image
should look like the following example. The Theta adjustment is
done in the same manner as the Y except Theta values are taken
from the right side of the test pages.
Summary Notes:
Objective: Using the X, Y, and T adjustment procedure, adjust the
color to overlay the radar image as precisely as possible.
X and Y values are taken from the left side. Theta is taken from the
right.
Increasing values for X drives the color radar right. Increasing values
for Y and Theta drive the color radar image down the page.
Do both the X and Y before attempting Theta.
Use a loop or magnifying glass (4x or higher) to make the job easier.
Yellow is very difficult. When you make the yellow adjustment, swap
the cyan toner cartridge with the yellow cartridge. Run through the
procedure making the correct adjustments to the yellow X, Y, and
Theta adjustment. Remember to swap the supplies position back to
the correct position when you finish.