Oki C9300n C9300/C9500 User's Guide: Macintosh - Page 199

Longitudinal black stripes Possible cause Image drum is damaged. Toner is low. Periodic black lateral lines or spots. The image drum has been exposed to light. Remedy Replace image drum. Change toner cartridge. • If the lines or spots occur at intervals of approximately 44 - 94 mm, the image drum (green tube) is damaged or dirty. If damaged, replace the image drum cartridge. If dirty, wipe the image drum gently with soft tissue. If this does not work, replace the image drum. • If the lines or spots occur at intervals of approximately 113 mm, the fuser roller is damaged. Change the fuser unit. Remove the image drum from the printer and store it in a dark place for several hours. If this does not work, replace the image drum. Faint shading on unprinted sections Possible cause Paper has been affected by static electricity. Paper is too thick. Toner is low. Remedy Store paper within specified temperature and humidity levels. Use recommended paper. Change toner cartridge. Blurred letter edges Possible cause LED is dirty. Cannot print desired color because toner is low. Black formation method does not match application. Remedy Clean LED with lens cleaner or soft tissue. Replace toner cartridge. Open the printer driver and set black formation to CMYK. C9300/C9500 Troubleshooting • 197