Xerox 4400DT Service Manual - Page 151

Light (Undertoned) Prints The overall image density is too light. Initial Actions I Inspect the printer paper path for items such as staples, paper clips, and paper scraps. I Check installation of the Print Cartridge. I Check that the Print Cartridge ground contacts (on the right side of the Print Cartridge and in the Print Cartridge Side Guide in the printer) are clean. I Ensure there are no obstructions in the Laser path. Light Prints Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Load fresh, dry paper. 2. Print a test print. Problem solved. Go to step 2. Does the image density meet specifications? 2 1. Install a new Print Cartridge. Go to Toner Go to step 3. 2. Print a test print. Sensor Does the image density meet specifications? Failure on page 3-8. 3 1. Remove the Print Cartridge. Go to step 4. Reform or 2. Inspect the Metal Grounding Contact on the Print Cartridge Side Guide. clean the Metal Grounding Is the Metal Grounding Contact intact and free Contact, so it of contamination? makes better contact with the drum shaft, or replace the Print Cartridge Side Guide (RRP 7.5 on page 6-83). 3-54 Phaser 4400 Laser Printer Service Manual