Xerox 4400DT Service Manual - Page 154

Blank Prints Troubleshooting Procedure (cont'd.) Step Actions and Questions Yes 4 1. Remove the Print Cartridge. Go to step 5. 2. Inspect the Metal Grounding Contact on the Print Cartridge Side Guide. Is the Metal Grounding Contact intact and free of contamination? 5 Check for continuity between the Metal Grounding Contact and the printer frame. Is there continuity between the Grounding Contact and the printer frame? Go to step 6. 6 Is the Transfer Roller intact and free of Go to step 7. contamination? 7 1. Generate a Test Print as in step 1 and switch Go to step 8. OFF the printer power halfway through the print cycle. 2. Carefully remove the Print Cartridge and inspect the toner image on the drum just before the transfer area (Transfer Roller). Is the image on the drum completely developed with sharp, black, easy-to-read areas? 8 Replace in order until the problem is solved: I HVPS PWB (RRP 9.6 on page 6-92) I Laser Assembly (RRP 7.4 on page 6-82) I Transfer Roller Assembly (RRP 7.1 on page 6-79), I Engine Logic Board (RRP 9.3 on page 6-89). I LVPS PWB (RRP 9.5 on page 6-91) I Print Cartridge Side Guide (RRP 7.5 on page 6-83) No Reform or clean the Metal Grounding Contact, so they make better contact with the drum shaft, or replace the Print Cartridge Side Guide (RRP 7.5 on page 6-83). Replace the Print Cartridge Side Guide (RRP 7.5 on page 6-83). Replace the Transfer Roller Assembly (RRP 7.1 on page 6-79). Go to High-Voltage Power Supply (HVPS) Assembly on page 3-31. Phaser 4400 Laser Printer Service Manual 3-57