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5-42 Phaser 8400/8500/8550/8560 Color Printer Service Manual
Print-Quality Troubleshooting
Black, Red, Green, Blue, Cyan, Magenta, and Yellow Solid Fills
These prints show uniformity of fill. Check for the following:
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.
.
Primary causes:
1. Weak jets or uneven Drum heating may cause uneven fills.
2. To solve wrinkling, try different print media. Replace the Drum
Maintenance Kit to correct streaking. 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 Reverse Text test print on page 5-37.
3. 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 movement. If either of the Transfix Arm
assemblies are worn, replace the arm.
If there are repeating white stripes on the print, there may be a problem with
the X-Axis motion, see
“White Stripes (Pinstripes)” on page 30.
s8500-056