3-74 Phaser 4400 Laser Printer Service ManualRepeating DefectsRecurring marks, spots, lines, or voids.Initial Actions Check that the paper supply is dry and fresh. Inspect the printer paper path for items such as staples, paper clips and paperscraps. Check installation of the Print Cartridge. Check that the Print Cartridge ground contacts (on the right side of the PrintCartridge and in the Print Cartridge Side Guide in the printer) are clean.4 Warning: If the printer has been switched on,the Fuser will be hot.1. Open the Rear Cover and remove the FuserAssembly.2. Rotate the fuser idler gear manually and inspect theHeat Roller.3. Open the fuser jam access cover.4. Rotate the fuser idler gear manually and inspect thePressure Roller.Are the Heat Roller and the Pressure Roller freeof surface defects and contamination?Go to step 5. Replace theFuserAssembly(RRP 6.2 onpage 6-66).5 Replace the following, in order, until the defectivecomponent is found: Transfer Roller Assembly (RRP 7.1 on page 6-79) Transport Chute Assembly (RRP 6.1 on page 6-65)Troubleshooting Repeating DefectsStep Actions and Questions Yes No1 1. Replace paper with fresh, dry paper.2. Print a test print.Do the repeating defects still appear?Go to step 2. Problemsolved.2 Do the defects occur every: 38 mm (1.5 in.)? 50 mm (2.0 in.)? 90 mm (3.54 in.)?Install a newPrintCartridge.Go to step 33 Do the defects occur every: 59 mm (2.32 in.)?Replace theTransferRollerAssembly(RRP 7.1 onpage 6-79).Go to step 4.Spot Deletions Troubleshooting Procedure (cont'd.)Step Actions and Questions Yes No
