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Phaser 8400/8500/8550/8560 Color Printer Service Manual 5-29
Print-Quality Troubleshooting
Repeating Defects on Print
The distance between each artifact of a repeating image defect reveals which
imaging component is causing the defect. Transfix Roller defects show up as
light spots in solid fill areas.
Initial Actions
■ Check the media used is supported by this printer.
■ Check that the paper path is clean and clear of debris.
4 Test the Preheater temperature.
Does the Preheater operate within the
normal operating range? Replace the
Preheater if necessary.
Did this correct the problem?
Replace in the following order:
■ Preheater
■ Electronics Module
Troubleshooting Reference
Applicable Parts Example Print
■ Transfix Roller
■ Drum Assembly
Repeating Defects Troubleshooting Procedure
Step Questions and Actions
Yes No
1 Repeating defects that occur every 11.6 cm
(4.58 in.) and do not move across the X-
Axis are caused by the Transfix Roller.
Clean or replace the Transfix Roller.
Did this correct the problem?
Complete. Go to Step 2.
Ink Smears on First Printed Side of Duplex Print Troubleshooting Procedure
Step Questions and Actions
Yes No
s8500-045