Xerox 5500/YB User Guide - Page 208

Print-Quality Problems Diagnosing Print-Quality Problems (Continued) Problem Horizontal Dark Streaks There are black lines that appear horizontally on the page. Causes Solutions 1. The drum cartridge may be defective or at the end of its life. 2. The paper path may be contaminated with toner. 3. The fuser may be defective. 1. Replace the drum cartridge. 2. Print several blank sheets of paper to remove the toner accumulations. 3. Replace the fuser (in the maintenance kit). Repetitive Vertical Dark Streaks There are black lines that appear vertically on the page. For more information, see "Repeating Defects" on page 4-57. 1. The paper path may be contaminated with toner. 2. The drum cartridge may be defective or at the end of its life. 3. The fuser may be defective. 4. The transfer roller may be defective. 1. Print several blank sheets of paper to remove the toner accumulations. 2. Replace the drum cartridge. 3. Replace the fuser (in the maintenance kit). 4. Replace the transfer roller (in the maintenance kit). Dark Spots or Marks There are dark spots or marks that appear in a random pattern on the page. 1. The paper path may be contaminated with toner. 2. The drum cartridge may be defective. 3. The fuser may be defective. 4. The transfer roller may be defective. 1. Print several blank sheets of paper to remove the toner accumulations. 2. Replace the drum cartridge. 3. Replace the fuser (in the maintenance kit). 4. Replace the transfer roller (in the maintenance kit). Phaser® 5500 Laser Printer 4-55