Troubleshooting 
 
106  Xerox
®
 Phaser
®
 6020 Printer 
  User Guide 
 
Symptom  Cause  Solution 
Blotchy or mottled images 
 
 
The paper is too light or too thin.  Choose a different paper type at the 
control panel, in the application, and in 
the print driver. 
The bias transfer roller voltage is 
insufficient for the paper type. 
Increase the bias transfer voltage for the 
selected paper type. For details, see 
Adjusting the Bias Transfer Roller on 
page 84. 
The fuser is not adjusted for the 
paper type. 
Adjust the fuser. For details, see 
Adjusting the Fuser on page 84. 
The relative humidity of the 
room is too high. 
Reduce the humidity in the room or move 
the printer to a new location. 
Paper curls or frequent jams in 
the rear cover 
The bias transfer roller needs to 
be refreshed. 
Refresh the bias transfer roller. For 
details, see Refreshing the Bias Transfer 
Roller on page 
84.