Xerox Phaser 6120

Image-Quality Problems
Phaser® 6120 Color Laser Printer Service Manual
4-29
Gradation Reproduction Failure
Typical Faulty Images
Troubleshooting Procedure
Step Section Check Item Result Action
1 Imaging Unit Is the outside of the imaging unit
dirty?
YES Clean.
2 Laser (PH)
Unit
Is the window surface dirty? YES Clean.
3 Density
Sensor
Is the sensor dirty? YES Clean.
4 Have steps 1-3 eliminated the
problem?
NO
■ Replace the Toner Cartridge.
■ Replace the Laser Unit (PH).
■ Replace the Density Sensor.
■ Replace the High Voltage
Unit.
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