Xerox 4400DT Service Manual - Page 161

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 Check that the paper is within specifications. I Inspect the paper path, between feed and exit, for contamination or obstructions. Vertical Streaks Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Diagnostics and select "Engine Test Go to step 3. Go to step 2. Print." 2. Scroll to "Print Quantity" and press OK. 3. Press OK to move the cursor over the last digit, then press the UP key until the last digit is "5." Press "Back" to return to the Engine Test Print menu. 4. Scroll to Print Test Pattern and press OK. Do the test prints have vertical streaks? 2 1. Exit Service Diagnostics. Remove and The problem 2. When the printer is Ready, scroll to "Printable Pages" reseat the and press OK. 3. Scroll to "Print Configuration Pages" and press OK. Image Processor appears to be with the host Do the prints have vertical streaks? Board. If the computer or problems the cables. If persist, the problems replace the persist, Image replace the Processor Image Board (RRP Processor 9.2 on Board (RRP page 6-88). 9.2 on page 6-88). 3 1. Install a new Print Cartridge. 2. Print a Test Print. Are the vertical streaks gone? Problem solved. Go to step 4. 4 Inspect the laser beam path between the Laser Assembly and the Drum. Is the laser beam path free of obstructions? Go to step 5. Remove any obstructions from the laser beam path. 5 Inspect the Transfer Roller Assembly for contamination Go to step 6 Replace the and wear. Transfer Is the Transfer Roller free of contamination and wear? Roller Assembly (RRP 7.1 on page 6-79). 3-64 Phaser 4400 Laser Printer Service Manual