If print quality deteriorates or dots appear on printouts, perform this operation to clean the transfer roller. Cleaning the Transfer Roller
[Clean Fixing Assembly]
[Menu] [Adjustment/Maintenance] [Maintenance]
Perform this operation to clean the fixing assembly if black streaks appear on printed paper following procedures such as toner cartridge replacement. Cleaning the Fixing Assembly
[Clean Drum]
[Menu] [Adjustment/Maintenance] [Maintenance]
If print quality deteriorates, perform this operation to clean the drum unit. Cleaning the Drum
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[Adjustment/Maintenance] 
