Repeating dark spots about 30mm intervals check

Issue description

Spots of toner are seen on every printed page, repeating at a 30mm (1.18 inch) frequency. See sample printouts below.

Print defect samples

Solution

1. This defect is most likely due to a damaged Charge Roll.

   The Charge Roll is included in the Photoconductor (PC) Unit.



2. To resolve the issue, replace the PC Unit.

Service action

This print quality defect is most likely due to a damaged Charge Roll. However, be sure to measure the defect interval accurately to determine which hardware part is causing the issue.

1. Ask the customer to send a sample printout via fax or e‑mail.



2. Identify the cause of the issue using the Print Defects Guide from the Help Menu. To do this, navigate to: Menus button > Help > Print Defects Guide .



3. Measure the defect's interval. Refer to the sample printouts in the customer-level section of this document to see how the measurement was done.

   Note:  The Charge Rollrepeating defect distance is 30mm (1.18 inch).



4. Check the Supply Level of the Photoconductor Unit by printing Device Statistics. To do this, navigate to: Menu button > Reports > Device Statistics.



5. If the Supply level is low, tell the customer to purchase a replacement Photoconductor Unit as it may already be worn out.



6. If the Supply level is still sufficient, proceed with the next step.



7. Check whether the customer has a different Photoconductor Unit in order to try swapping it with the original as a test, since if the defect clears when using a different Photoconductor Unit that would prove the original is defective. Should the customer not have a replacement unit to try this test with, however, send a replacement Photoconductor Unit as the original one might be defective.



8. If the defect persists even after replacing the Photoconductor Unit, escalate the call to your next level of support.