Brother International MFC-6650MC Users Manual - English - Page 219

205 T R O U B L E S H O O T I N G A N D M A I N T E N A N C E DIFFICULTY SUGGESTIONS Printed pages are marked Markings may disappear by themselves. Try copying at regular intervals multiple pages to clear this problem. Markings may occur if the MFC has not been used for a long time. A possible cause is that the surface of the drum is scratched. You must then replace the drum unit with a new one. If the markings do not disappear, it may be that Example of Regular Marking the drum was marked or damaged by excessive exposure to light. In this case, replace the drum unit with a new one. Printed pages are blurred at Certain environmental conditions such as humidity, high the center or at either edge temperatures, etc. may cause this condition to occur. Make sure the MFC is placed on a flat, horizontal surface. Remove the drum unit with the toner cartridge installed. Try rocking them from side to side. You may clear a blurred Blurred Page page by wiping the scanner windows with a clean soft cloth. (See "Regular Maintenance", "Cleaning the Printer" and "Cleaning the Drum Unit" on pages 214 and 215.) If a blurred page occurs after cleaning and the display shows CHANGE DRUM SOON, replace the drum unit with a new one. Ghost images appear on printed page Ghost Images Adjust the print conditions by setting the Print Density function. Make sure that you use paper that meets the specifications. Rough surfaces or thick media can cause a ghost image. The drum unit is a consumable item and it is necessary to replace it periodically.