5-28 Phaser 4500/4510 Service ManualPrint-Quality Troubleshooting3 1. Install a new print cartridge.2. Print a test print.Do the prints have horizontalstreaks?Problem solved. Go to step 4.4 Verify that the connectors on theLaser Assembly are firmlyconnected.Verify that the Laser Assembly isfirmly connected to the frame.Go to step 5. Reconnect theconnectors and/or re-install the LaserAssembly.5 Replace Drive Assembly and gearassembly housingReprint the problem image.Does the problem still occur?Go to step 6. Problem solved.6 Inspect the transfer rollerassembly for contamination andwear.Is the transfer roller free ofcontamination and wear?Go to step 7. Replace the transferroller assembly(page 8-45).7 1. On the control panel, scroll toInformation, then press theOK button.2. Scroll to Information Pages,then select the OK button.3. Scroll to Print Test Prints,then press the OK button.4. Switch OFF the printer powerhalfway through the print cycle.5. Carefully remove the printcartridge and inspect the tonerimage on the drum just beforethe transfer area (transferroller).Is the image on the Drumdeveloped with sharp, black,easily read areas and nohorizontal streaks?Go to step 8. Go to High-VoltagePower Supply(HVPS) Assembly(page 4-32).8 Inspect the toner image on thepaper immediately after thetransfer area (transfer roller).Is the toner image on the paperclear without any horizontalstreaks?Go to step 9. Replace the transferroller assembly(page 8-45).Horizontal Streaks Troubleshooting Procedure (continued)Step Actions and Questions Yes No
