Specifications

7.5.5 The Checkerboard Pattern
1. Press the SET TOF (8) key and observe that the printer display
changes to [.c b P]. The Checkerboard Pattern is printed (see Fig-
ure 7–7). Press the FCT (9) key to stop printing the pattern; press
the FCT (9) key again to resume printing the same pattern.
2. The checkerboard pattern is an overview of the entire adjustment
procedure. If all the adjustment procedures have been correctly
performed and the hardware is operating correctly, the checkerboard
pattern should appear as a uniform gray with no apparent streaks
or zigzags. If the checkerboard pattern is the same as Figure 7–7,
replace the logic board retainer, replace the left side panel, and
return to normal operations.
3. If the checkerboard pattern is not the same as Figure 7–7 and the
adjustment procedures have been correctly performed, it indicates
the the print actuator modules should be swapped, realigned, or
replaced.
Figure 7–7: Checkerboard Pattern Sample Printout
RE7586
KEY 8: CHECKERBOARD PATTERN
7.6 Print Actuator Module Adjustment Procedure
Good alignment of the print actuator modules shows a vertical series
of black and white rectangles at the two gap areas (Figure 7–6 A). Bad
alignment (excessive gap between the modules) of the print actuator mod-
ules shows a vertical white line dividing the black and white rectangles
(Figure 7–6 B).
7–16 PRINT QUALITY ADJUSTMENT PROCEDURES