Xerox 8500DN Service Manual - Page 224

Print-Quality Troubleshooting Fuzzy Text Troubleshooting Procedure Step Questions and Actions Yes No 4 1. Test the Drum Temperature Sensor with Complete. Service Diagnostics. 2. Check that the Drum Termperature Sensor is clean and properly positioned. Did this correct the problem? Go to Step 5. 5 1. Test the Y-Axis Encoder. 2. Run the Service Diagnostics Y-axis Encoder test. Is the Y-axis encoder working properly? Go to Step 6. Clean the encoder or replace the Drum Assembly. 6 Check X-Axis motion. See "White Stripes (Pinstripes)" on page 5-30 for troubleshooting this problem. Did this correct the problem? Complete. Go to Step 7. 7 Verify the Printhead is tilted forward against Complete. the Drum in the proper print position. Did this correct the problem? Poor Primary Color Fills Primary fills appear banded and inconsistent. 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 ■ Y-Axis Encoder ■ X-Axis Motor ■ Printhead Example Print s8500-039 5-18 Phaser 8400/8500/8550/8560 Color Printer Service Manual