09/2007
3-29
Phaser 8860/8860MFP Service Manual
Image Quality
Initial Issue
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. They are also
used to purge discoloration of a particular jet or color.
Figure 9 Single Primary Solid Fill Test Prints
Look for:
1. Even, uniform fills throughout the print.
2. There should be no wrinkling or deformity of the paper throughout the print.
3. Poor transfer on one side.
4. Repeating white stripes.
Causes:
1. Weak jets or uneven drum heating may cause uneven fills
2. 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 or the sensor is
not in proper contact with the drum. See the test print Reverse Text.
3. If there is poor transfer, check to see if the transfix load arm assemblies are moving easily.
Clean any contamination that may be interfering with the transfix arm assembly move-
ment. If either of the transfix load arm assemblies are worn, replace the worn load arm
assembly.
4. If there are repeating white stripes on the print, there may be a problem with the X-Axis
motion.
OHP Color Bands
This print is used by Manufacturing and Engineering only.
Primary Solid Fills 10x
This item enables you to print 10, single-sided, solid-fill, prints in Cyan, Magenta, Yellow or
black. These prints can be used to determine if the drum or Transfix Roller have a defect.
Drum defects do not move in the X-position print-to-print; but it does move into the Y-position
print-to-print; drum defects do not repeat down the page.
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