Xerox 4400DT Service Manual - Page 175

Uneven Density Image density varies within the page in either direction. Initial Actions I Load fresh dry paper. I Check that the correct Print Cartridge is properly installed and not empty. I Ensure that the machine is reasonably level. I Check to make sure the Laser path is clean and unobstructed. I Remove the Print Cartridge and check the Left and Right Guides for wear, contamination, obstructions, etc. I Clean the Laser window. Uneven Density Troubleshooting Procedure Step Actions and Questions Yes No 1 Print a Test Print. Does the Test Print output image contain uneven print? 2 1. Install a new Print Cartridge (PL 8.1 Drive and Xerographics on page 7-20). 2. Print a Test Print. Does the Test Print output image contain uneven print? Go to step 2. Go to Service Flowchart on page 2-2. Go to step 3. Problem solved. Go to Service Flowchart on page 2-2. 3 Check the Transfer Roller for contamination, even spring pressure, and proper installation. Is the Transfer Roller in good condition (not contaminated) and properly installed? Go to step 4. Repair or replace the Transfer Roller Assembly (RRP 7.1 on page 6-79). 3-78 Phaser 4400 Laser Printer Service Manual