Xerox 4400DT Service Manual - Page 166

Spots Troubleshooting Procedure (cont'd.) Step Actions and Questions Yes No 3 1. Generate a Test Print and switch OFF the printer Go to step 4. 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) Is the image on the drum completely developed Assembly on with sharp, black, easy-to-read areas and no page 3-31. spots? 4 Warning: If the printer has been switched on, Go to step 5. Replace the the Fuser will be hot. Fuser 1. Open the Rear Cover. 2. Remove the Fuser Assembly. 3. Rotate the fuser idler gear manually and inspect the Assembly (RRP 6.2 on page 6-66). Heat Roller. 4. Open fuser jam access cover. 5. Rotate the fuser idler gear manually and inspect the Pressure Roller. Are the Heat Roller and the Pressure Roller free of surface defects and contamination? 5 Replace the following, in order, until the defective component is found: I Transfer Roller Assembly (RRP 7.1 on page 6-79) I Fuser Assembly (RRP 6.2 on page 6-66) I Transport Chute Assembly (RRP 6.1 on page 6-65) I HVPS PWB (RRP 9.6 on page 6-92) I Laser Assembly (RRP 7.4 on page 6-82) I Engine Logic Board (RRP 9.2 on page 6-88) Unfused Image The printed image is not fully fused to the paper. The image rubs off easily. Initial Actions I Check to ensure that the paper is within specification. Phaser 4400 Laser Printer Service Manual 3-69