Oki B431dn B411 B431 User Guide - Eng - Page 129
SYMPTOM, PROBLEM, SOLUTION, Clean LED array.
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SYMPTOM PROBLEM SOLUTION Page has repetitive marks. Oblong area of faint print appears on each page. Vertical white streaking or faint areas on page. Vertical black lines. Fuzzy print. Distorted print. Smeared or blotched print. Printed page is light/ blurred. Bold characters and dark lines are smeared. Damaged image drum cartridge causes repetitive marks every 1.6 inches (4.06 cm) due to surface nicks and scratches. Drop out caused by using paper exposed to high humidity. Toner is low and does not distribute properly, or the drum is worn out. LED array is dirty. Hardware problem. LED array is dirty. Paper path, lamp assembly, or fusing unit problem. Dirty rollers; toner dropped inside printer or image drum problem. Is toner low? Is paper meant for laser printers? LED array is dirty. Toner is low. Generate a cleaning page, repetitive marks may be temporary. Change paper stocks, check paper storage environment or use a dehumidifier; check toner level. Replace toner cartridge. Check drum and replace the drum, if necessary. Contact service. Clean LED array. Contact service. Clean LED array. Generate cleaning page. Contact service. Replace image drum and toner. Contact service. Replace toner cartridge. Use recommended paper. Clean LED array. Install new toner cartridge. 129 > B411/B431 Troubleshooting