Xerox Phaser 8560MFP Service Documentation page 110

Figure 7 YMCKRGB Solid Fill Test Prints
Causes:
• Weak jets or improper Drum heating can cause uneven fills.
• To solve wrinkling, try different print media. Replace the maintenance kit to correct streak-
ing. Check the drum temperature sensor for debris build-up on the sensor. Check to see if
the sensor is in improper contact with the drum. See the Reverse Text test print. As a last
resort to fix wrinkling, replace the transfix roller, transfix load module, and transfix load
arm.
• If there is poor transfer on one side, check to see if the transfix load arm assemblies are
moving easily. Clean any contamination that may be interfering with the transfix arm
assembly movement. If either of the transfix load arm assemblies are worn, replace the
worn load arm assembly.
• If there are repeating white stripes on the print, there may be a problem with the X-Axis
motion, see IQ31.
Drum Seal
This print is used by manufacturing and Engineering only.
Paper Path
This print is used by Manufacturing and Engineering only.
Head to Drum Check
These prints indicate if the gap between the printhead and the drum is correct.
Image Quality
Lines: The horizontal lines of the print are made up of long and short dashes. Inspect the first
and last 1/2 in. (12 mm) of the black lines for the vertical distance between the short dashes
and long dashes. A difference indicates the printhead gaps at each end of the printhead are
not equal.
Text: Examine each end of the band of text. Look for fuzziness or differences between the qual-
ity of the characters on the left and right ends of the print. A difference indicates the printhead
gaps at each end of the printhead are not equal.
The ends of this system's printhead rests on two spacers on the ends of the drum that hold the
head-to-drum gap under much tighter control than in previous solid ink systems. There is no
head-to-drum adjustment possible in this system. If the gap is suspect, check that the print-
head is correctly and completely installed.
Figure 8 Head to Drum Check Test Print
Manual X-Axis (Scanner)
This print is used by Manufacturing and Engineering only.
Black, Red, Green, Blue, Cyan, Magenta, and Yellow Solid Fills
These single-sided test prints show the uniformity of fill for an individual color. There are also
used to purge discoloration of a particular jet.
10/2006
3-28
Initial Issue
Phaser 8510/8560MFP Multifunction Product