Phaser 6121MFP Service Manual 5-7
Print-Quality Troubleshooting
Print Quality Troubleshooting
The following table provides a list of possible print quality problems and lists pages
for more information.
Printing Test Patterns
Many of the troubleshooting procedures require that you print one of the printers
built-in test patterns. Use the following procedure to print the test pattern.
1. On the initial screen, press the following keys in this order.
OK > Stop/Reset > 0 > 0 > Stop/Reset > 0 > 1.
2. Press the Down Arrow button to navigate to Function, and then press OK.
3. Navigate to Prn Test Pattern, and then press OK.
4. Select a paper tray and press OK.
5. Select a test pattern, and then press OK.
Print Quality Summary
Print Quality Problem Go to
Blank Copy or Black Copy 5-8
Light Print 5-10
Foggy Background 5-12
White or Colored Lines and Bands in Feed Direction 5-14
White or Colored Lines and Bands in Scan Direction 5-16
Black Spots 5-19
Gradation Reproduction Failure 5-20
Void Areas and White Spots 5-21
Colored Spots 5-23
Blurred Image 5-24
Incorrect Color Image Registration 5-25
Poor Fusing Performance or Offset 5-26
Brush Effect or Blurred Image 5-27
Back Marking 5-28
Uneven Pitch 5-29
Skew 5-31
Uneven Density in the Feed Direction 5-33
Uneven Density in The Scan Direction 5-34
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