9-26
Phaser 600 Color Printer
9
Checks and Adjustments
Drum step adjustment
1.
Ensure that the printhead drive voltages are correct as explained in
the earlier procedure,“Printhead drive voltage adjustment” on
page 9-15.
2.
Scroll to and enter the Extended Service Support menu and then scroll
to the
Drum Step Pattern
menu item. Press
to print a
drum step test pattern so you can determine if a drum step change is
required.
3.
Examine the resulting print. With a magnifying lens, examine the
convergence test print; it shows a series of alignment patterns, each
indicates a 10 vertical pixels difference drum step variation. The
pattern at the bottom of the print shows the current drum step setting.
Ignore the gradiated appearance of many of the patterns; that is an
artifact the test. Only look for the thin horizontal black and white
lines.
4.
Under ordinary circumstances, the drum step pattern 0 should show
the best convergence. If thin horizontal black lines are visible the
drum is stepping too far between printhead passes. If thin horizontal
white lines are visible the drum is not stepping far enough between
printhead passes.
5.
If the value must be changed, scroll to the Drum Step menu. Press the
Menu
button. The currently set convergence value is displayed, for
example:
Drum Step: 2
. Use the arrow keys to set the displayed
value to the desired value. Press
Select
to saves the displayed
value.
6.
Scroll back to
Drum Step Pattern
menu and print another test
print to check the adjustment.
If the alignment does not remain consistent, then the Y-axis belt
tension may be incorrect. Check, clean and adjust, if necessary.