Image-Quality Problems
Phaser® 6120 Color Laser Printer Service Manual
4-39
Back Marking
Typical Faulty Images
Troubleshooting Procedure
Step Section Check Item Result Action
1 Paper path Is there a foreign object in the paper
path?
YES Remove the foreign object.
2 Fusing Unit Is the Fusing Entrance Guide Plate
dirty or scratched?
YES Clean or replace.
3 Is the Fusing Roller scratched or
dirty?
YES Replace the Fusing Unit.
4 Transfer Belt
Unit
Is the Transfer Belt dirty with
fingerprints or foreign matter?
YES Clean.
5 Is the 2nd Transfer Roller scratched? YES Replace the Transfer Roller.
6 Have steps 1-5 eliminated the
problem?
NO
■ Replace the Transfer Belt Unit.
■ Replace the High Voltage
Unit.
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