Lexmark Optra C Service Manual - Page 87

5045-001 Black Vertical Lines Symptom: Thin vertical black lines of any length, anywhere on the page. Cause: Worn out or damaged photoconductor. This may be caused by the photoconductor reaching end-of-life or damage resulting from a severe paper jam. Resolution: Replace the photoconductor. Do not use a used photoconductor for diagnostic purposes. The printer determines photoconductor life by its electrical characteristics. Swapping used photoconductors may result in inaccurate photoconductor life, which may result in customer dissatisfaction or a service call. Blur at Bottom of Page Symptom: A horizontal defect approximately 17 mm from the bottom of the page. This defect is composed of vertical streaks, smears or a blur. In severe cases, there may also be a blur 17 mm from the top of the page. Cause: Certain weight and composition papers (mostly cotton), are not adhering to the transfer drum. This causes the trailing edge to "flap", contacting the developer roller in the cartridge or the photoconductor. Resolution: Change paper types. Diagnostic Information 2-55