Xerox 8500DN Service Manual - Page 229

Vertical Lines Appear Wavy Print-Quality Troubleshooting Straight vertical lines appear to be wavy and ill-formed. This problem is likely caused by too much oil on the Drum. Initial Actions ■ Check the media used is supported by this printer. ■ Check that the paper path is clean and clear of debris. Troubleshooting Reference Applicable Parts ■ Drum Temperature Sensor ■ X-Axis Motor ■ Y-Axis Encoder ■ Drum Maintenance Pivot Plate ■ Drum Maintenance Camshaft Example Print s8500-041 Wavy Vertical Lines Troubleshooting Procedure Step Questions and Actions Yes No 1 Check and clean the Drum Maintenance Kit Complete. wiper blade. Replace the kit if necessary. Did this correct the problem? Go to Step 2. 2 Check X-Axis motion and verify there is Complete. nothing interfering such as a poorly dressed cable or screw. Replace any defective parts. Did this correct the problem? Go to Step 3. 3 Test the Y-Axis Encoder. 1. Run the Service Diagnostics Y-Axis Encoder test. Is the Y-axis encoder working properly? Go to Step 4. Clean the Drum encoder or replace the Drum Assembly. Phaser 8400/8500/8550/8560 Color Printer Service Manual 5-23