Internal cleaning During the printing process, paper, toner, and dust particles can accumulate inside the printer. Over time, this buildup can cause print quality problems such as toner specks or smearing. This printer has an internal cleaning mode that can correct and prevent these types of problems. WARNING! Before you begin these steps, turn the printer off and unplug all power cords to avoid shock hazard. Step 1 Open the top cover. Figure 28. Top cover Step 2 Remove the toner cartridge. Figure 29. Remove toner cartridge 62 Chapter 4 Printer maintenance C7058-90936