Xerox 4400DT Service Manual - Page 163

Horizontal 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 horizontal streaks? 2 1. Exit Service Diagnostics. Remove and The problem 2. When the printer is Ready, scroll to "Printable Pages" and press OK. 3. Scroll to "Print Configuration Pages" and press OK. reseat the Image Processor appears to be with the host Do the prints have horizontal 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 horizontal streaks gone? Problem solved. Go to step 4. 4 1. Remove the Print Cartridge. Go to step 5. Reform or 2. Inspect the metal grounding contacts on the Print Cartridge Side Guide. clean the Metal Is the metal grounding contact intact and free of Grounding contamination? Contact, so it makes better contact with the drum shaft, or replace the Print Cartridge Side Guide (RRP 7.5 on page 6-83). 5 Check for the continuity between the metal grounding Go to step 6. Replace the contacts and the printer body frame. Print Is there continuity between the grounding contacts and the Printer Frame? Cartridge Side Guide (RRP 7.5 on page 6-83). 6 Inspect the Transfer Roller Assembly for contamination Go to step 7. Replace the and wear. Transfer Is the Transfer Roller free of contamination and wear? Roller Assembly (RRP 7.1 on page 6-79). 3-66 Phaser 4400 Laser Printer Service Manual