Troubleshooting Steps Resolution1. Cycle power to the printer. Did this correct the problem? Yes – CompleteNo - Go to Step 2.2. Process Direction: Remove the Imaging Units and Transfer Unit. Inspect the ColorRegistration Sensors for dirt, debris or toner build-up. Are the sensors clean?Yes – Go to Step 3.No - Clean the sensors.3. Check the Color Registration Shutter. Run the Service Diagnostics Registration Shuttertest. Is the shutter functioning correctly?Yes – Go to Step 4.No - Replace the solenoid or harness.4. Inspect the Transfer Unit for tears or damage on the edges of the belt. Is the belt damaged? Yes – Replace Transfer Unit.No - Go to Step 5.5. Check the Drum drive gears for missing or worn gear teeth. Run the Service DiagnosticsImaging Unit Motors tests to visually inspect the gears. Are the gears working correctly?Yes – Go to Step 6.No - Replace the Drum Drive Gear.6. Replace the Registration Sensor Board. Did this fix the problem? Yes – Complete.No - Go to Step 7.7. Scan Direction: Use the configuration page to identify the problem color. Remove theImaging Unit of the suspect color. Inspect the grounding shaft. Has the shaft shifted?Yes – Replace the Imaging Unit.No - Go to Step 8.8. Check the Imaging Unit guides for debris or damage. Are the guides damaged orobstructed?Yes – Clean the guides on the chassisor replace assembly.No - Go to Step 9.9. Check the Color Registration Sensors for dirt or debris. Be sure to check in and around theregistration shutter.Yes – Clean the sensor.No - Go to Step 10.10. Check the Color Registration Shutter. Run the Service Diagnostics Registration Shuttertest. Is the shutter functioning correctly?Yes – Go to Step 11.No - Replace the solenoid or harness.11. Are the LED Head ribbon cables undamaged, properly routed and seated? Yes – Go to Step 12.No - Reseat, correctly route orreplace the wiring harness.12. Swap the LED Head of the problem color with any other LED Head. Print a Suppliespage. Has the problem moved with the LED Head?Yes – Replace the defective LEDHeadNo - Go to Step13.13. Replace the Registration Sensor Board. Did this fix the problem? Yes – Complete.No - Go to Step14.15. Replace the CUPU Board. End4.1 Troubleshooting Paper Feed46