01/023-38825/8830 Printer Print Quality Initialization Procedure, Print DefectsPrint QualityPrint Quality Initialization ProcedurePrior to any print quality troubleshooting, validate that the problem is in the IOT by entering [9-55]. Select test pattern 5. Examine the test print for defects. If defects appear, complete thefollowing checklist. If the defects are still present after completing the checklist, refer to theImage Quality Defects and Classification information on the following pages to classify andrepair the problem.1. Drum life (Refer to Section 1)2. Ensure that the Charge Scorotron is not damaged or contaminated.3. Ensure that the Image Module Roller fully contacts the drum and does not exhibit abnor-mal wear or contamination.4. Refer to ADJ 9.2, Electrostatic Series and check that the following voltages are withinspecification:• Charge Scorotron (V High)• Image Module LED Duty Cycle (V Low)5. Check that the Toner Concentration (TC) is calibrated correctly [9-21-4]If the print quality defect is still present, go to the Print Defects in this section.Print DefectsPrint quality refers to the entire print. Defects can occur anywhere on the print. These defectscould be damaged media or print quality defects.Always eliminate problems that cause the damaged media before attempting to fix print qualityproblems. Some damaged media problems could cause print quality problems.Compare the print defect to the definitions on this page and the next page. After you havedetermined the definition that best describes the print defect, go to the Section Contents page.The Section Contents page will direct you to a Print Quality Problem / Cause Table. The Prob-lem / Cause Table lists the probable causes and corrective actions.The PROBABLE CAUSES are arranged in order of most probable cause to least probablecause or the ease of the check. CORRECTIVE ACTIONS are given for each cause. Read allof the probable causes before taking any corrective action.1. Start with the first PROBABLE CAUSE and continue through the list until you come to thecause that best applies to the image defect.2. Perform the CORRECTIVE ACTION.3. If the defect has been corrected, go to the Maintenance Activities in the Service Call Pro-cedures in Section 1. If the defect is still present, continue with the other PROBABLECAUSES.
