5-36 Phaser 8400/8500/8550/8560 Color Printer Service Manual
Print-Quality Troubleshooting
Color Bands, RGBK Dither
The large, secondary colored areas in this print reveal banding and weak jets.
Look for: Vertical “bars” or bands of much lighter color or a different hue
running in-line in one or more of the solid fills.
Causes: A weak jet can cause banding; see the Weak/Missing Jets test print
on
page 5-34. Banding can also be caused by color-to-color misregistration.
Use the diagnostics to ensure that the Printhead and Drum thermals are
correct. Follow the instructions on the
“On-site Printhead Troubleshooting
Checklist (8400)” on page A-8
s8500-050
Banding
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