Xerox 4400DT Service Manual - Page 174

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 the machine covers are in place and fit well so no outside light can enter the machine. Background Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Install a new Print Cartridge. 2. Print a Test Print. Is the background gone? Problem solved. Go to step 2. 2 1. Generate a Test Print and switch OFF the printer Go to step 3. Go to power halfway through the print cycle. High-Voltage 2. Carefully remove the Print Cartridge and inspect the toner image on the drum just before the transfer area (Transfer Roller). Power Supply (HVPS) Are the undeveloped areas of the drum clean Assembly on and without background? page 3-31. 3 Clean or replace the Fuser Assembly (page 6-66). Is the background is gone? Problem solved. Go to step 4. 4 Replace the following, in order, until the defective component is found: I HVPS PWB (RRP 9.6 on page 6-92) I Fuser Assembly (RRP 6.2 on page 6-66) I Transport Chute Assembly (RRP 6.1 on page 6-65) I Laser Assembly (RRP 7.4 on page 6-82) I Print Cartridge Side Guide (RRP 7.5 on page 6-83) I Engine Logic Board (RRP 9.3 on page 6-89). Phaser 4400 Laser Printer Service Manual 3-77