Step 1 Make sure all the packing materials on the imaging unit are removed. Does the problem remain? | Go to step 2. | The problem is solved. |
Step 2  Enter the Diagnostics menu, and then navigate to: Advanced Print Quality Samples > Advanced Print Quality Samples Check the test page.
Is only one color missing? | Go to step 3. | Go to step 5. |
Step 3 Check the contacts between the imaging unit and developer unit of the affected color. Are the contacts clean? | Go to step 5. | Go to step 4. |
Step 4 Clean the contacts. Does the problem remain? | Go to step 5. | The problem is solved. |
Step 5 - If the affected color is cyan, magenta, or yellow, then replace the developer unit of the affected color.
- If the affected color is black, then replace the imaging unit.
Does the problem remain? | Go to step 6. | The problem is solved. |
Step 6 Remove the imaging kit. Enter the Diagnostics menu, and then navigate to: Printer diagnostics & adjustments > Motor tests Select the developer unit motor of the affected color, and then touch Start.
Does the motor run? | Go to step 8. | Go to step 7. |
Step 7 Replace the motor. See Motor (EP drive) removal. Does the problem remain? | Go to step 8. | The problem is solved. |
Step 8 Manually turn the motor. While turning the motor, check if the couplers that drive the imaging kit move.
Do the couplers move? | Go to step 10. | Go to step 9. |
Step 9 Replace the EP gear box. See EP gear box removal. Does the problem remain? | Go to step 10. | The problem is solved. |
Step 10 Check if the pins on the HVPS freely move. Do the pins freely move? | Go to step 12. | Go to step 11. |
Step 11 Replace the HVPS. See HVPS removal. Does the problem remain? | Go to step 12. | The problem is solved. |
Step 12 Check the continuity of the cable on the JSC1 connector on the controller board. Does the cable have continuity? | Go to step 14. | Go to step 13. |
Step 13 Replace the cable. Does the problem remain? | Go to step 14. | The problem is solved. |
Step 14 Replace the printhead. See Printhead removal. Does the problem remain? | Go to step 15. | The problem is solved. |
Step 15 Replace the controller board. See Controller board removal. Does the problem remain? | Contact the next level of support. | The problem is solved. |